diff --git a/src/inc/taosdef.h b/src/inc/taosdef.h
index 1e0ddf0f9f23a10f5e5ad573d78488b2892f896f..251e3a9e4031cc0c4e48fe7c89ba1f1c1535c704 100644
--- a/src/inc/taosdef.h
+++ b/src/inc/taosdef.h
@@ -206,7 +206,7 @@ void tsDataSwap(void *pLeft, void *pRight, int32_t type, int32_t size);
 #define TSDB_MAX_SAVED_SQL_LEN    TSDB_MAX_COLUMNS * 64
 #define TSDB_MAX_SQL_LEN          TSDB_PAYLOAD_SIZE
 #define TSDB_MAX_SQL_SHOW_LEN     256
-#define TSDB_MAX_ALLOWED_SQL_LEN  (8*1024*1024U)          // sql length should be less than 6mb
+#define TSDB_MAX_ALLOWED_SQL_LEN  (8*1024*1024U)          // sql length should be less than 8mb
 
 #define TSDB_MAX_BYTES_PER_ROW    TSDB_MAX_COLUMNS * 64
 #define TSDB_MAX_TAGS_LEN         65536
diff --git a/tests/script/general/alter/cached_schema_after_alter.sim b/tests/script/general/alter/cached_schema_after_alter.sim
index 921cfee3d11fbaaff55cd945f18b3635fda9b0e1..d06856d5ff62e5cf96508994906847f690cfa593 100644
--- a/tests/script/general/alter/cached_schema_after_alter.sim
+++ b/tests/script/general/alter/cached_schema_after_alter.sim
@@ -53,7 +53,7 @@ endi
 
 print ================== restart server to commit data into disk
 system sh/exec.sh -n dnode1 -s stop -x SIGINT
-sleep 2000
+sleep 5000
 system sh/exec.sh -n dnode1 -s start
 print ================== server restart completed
 sql connect
diff --git a/tests/script/general/alter/metrics.sim b/tests/script/general/alter/metrics.sim
index b346b3b2c039be2aed4b9f03b50944bf18a34004..a2c5b7b465302cf6e8d5e9c634ca7d80009a652e 100644
--- a/tests/script/general/alter/metrics.sim
+++ b/tests/script/general/alter/metrics.sim
@@ -375,9 +375,9 @@ endi
 print ======== step9
 print ======== step10
 system sh/exec.sh -n dnode1 -s stop -x SIGINT
-sleep 3000
+sleep 5000
 system sh/exec.sh -n dnode1 -s start
-sleep 3000
+sleep 5000
 
 sql use d2
 sql describe tb
diff --git a/tests/script/general/alter/table.sim b/tests/script/general/alter/table.sim
index c6402b45f748a20957f14e60b6ce1075f587ec22..25d3b4206655ba1a2f1a3397b397fea770411c5f 100644
--- a/tests/script/general/alter/table.sim
+++ b/tests/script/general/alter/table.sim
@@ -326,9 +326,9 @@ endi
 print ======== step9
 print ======== step10
 system sh/exec.sh -n dnode1 -s stop -x SIGINT
-sleep 3000
+sleep 5000
 system sh/exec.sh -n dnode1 -s start
-sleep 3000
+sleep 5000
 
 sql use d1
 sql describe tb
diff --git a/tests/script/general/cache/restart_metrics.sim b/tests/script/general/cache/restart_metrics.sim
index c85a66869ac6cc24fc14645ccf1aa4fc7a1f4e8f..376a491f2604c7802fdf688208f67fbf99b7a273 100644
--- a/tests/script/general/cache/restart_metrics.sim
+++ b/tests/script/general/cache/restart_metrics.sim
@@ -57,7 +57,8 @@ system sh/exec.sh -n dnode1 -s start
 
 print =============== step3
 print ==> sleep 8 seconds to renew cache
-sleep 8000
+sql reset query cache
+sleep 1000
 
 print =============== step4
 sql create database $db
diff --git a/tests/script/general/column/commit.sim b/tests/script/general/column/commit.sim
index 035d28d3e523a2657f52a818a1c3481c0d6e371d..c574db1aa9dd28139251b4aa0433200e5fde230a 100644
--- a/tests/script/general/column/commit.sim
+++ b/tests/script/general/column/commit.sim
@@ -89,9 +89,9 @@ endi
 
 print =============== step4
 system sh/exec.sh -n dnode1 -s stop -x SIGINT
-sleep 4000
+sleep 5000
 system sh/exec.sh -n dnode1 -s start
-sleep 3000
+sleep 5000
 
 print =============== step5
 
diff --git a/tests/script/general/column/metrics.sim b/tests/script/general/column/metrics.sim
index 401a4ae54ea896e1ff72b17c58bf2275f9ce8cf0..673b66c9e266a68171161c88d3e2dfadd9d446da 100644
--- a/tests/script/general/column/metrics.sim
+++ b/tests/script/general/column/metrics.sim
@@ -157,9 +157,9 @@ endi
 
 print =============== step4
 system sh/exec.sh -n dnode1 -s stop -x SIGINT
-sleep 1000
+sleep 5000
 system sh/exec.sh -n dnode1 -s start
-sleep 2000
+sleep 5000
 
 print =============== step5
 
diff --git a/tests/script/general/column/table.sim b/tests/script/general/column/table.sim
index 8e9c44fc466457e682848cd93de5359c8a213781..aec0dc3c75031f9c4e167ffae5511ff34e4ec886 100644
--- a/tests/script/general/column/table.sim
+++ b/tests/script/general/column/table.sim
@@ -129,9 +129,9 @@ endi
 
 print =============== step4
 system sh/exec.sh -n dnode1 -s stop -x SIGINT
-sleep 1000
+sleep 5000
 system sh/exec.sh -n dnode1 -s start
-sleep 2000
+sleep 5000
 
 print ==============  step5
 
diff --git a/tests/script/general/compress/commitlog.sim b/tests/script/general/compress/commitlog.sim
index 7c167db3f3a2d97de1efc7f34856d32c83686fa3..b5d653fe83e94045c6f5f7ce7f58104504ad5330 100644
--- a/tests/script/general/compress/commitlog.sim
+++ b/tests/script/general/compress/commitlog.sim
@@ -89,7 +89,7 @@ print =============== step4
 system sh/exec.sh -n dnode1 -s stop -x SIGINT
 sleep 5000
 system sh/exec.sh -n dnode1 -s start
-sleep 3000
+sleep 5000
 
 print =============== step5
 
diff --git a/tests/script/general/compress/compress.sim b/tests/script/general/compress/compress.sim
index 93fdcbaafab9bdbe3b845a282a6720788f91abfe..6975f879968107bd142a3595869fc120bc1daa02 100644
--- a/tests/script/general/compress/compress.sim
+++ b/tests/script/general/compress/compress.sim
@@ -84,7 +84,7 @@ print =============== step4
 system sh/exec.sh -n dnode1 -s stop -x SIGINT
 sleep 5000
 system sh/exec.sh -n dnode1 -s start
-sleep 3000
+sleep 5000
 
 print =============== step5
 
diff --git a/tests/script/general/compress/compress2.sim b/tests/script/general/compress/compress2.sim
index 0eb58bd94b8476b1cfe087a3dd5ed60f02f5ca0e..cf96f572ace4a693b1c5640986510d2f5a4d9d74 100644
--- a/tests/script/general/compress/compress2.sim
+++ b/tests/script/general/compress/compress2.sim
@@ -84,7 +84,7 @@ print =============== step4
 system sh/exec.sh -n dnode1 -s stop -x SIGINT
 sleep 5000
 system sh/exec.sh -n dnode1 -s start
-sleep 3000
+sleep 5000
 
 print =============== step5
 
diff --git a/tests/script/general/db/alter_tables_d2.sim b/tests/script/general/db/alter_tables_d2.sim
index 1fd24f9cec5b54c1be7531f24a3f590d94b28e38..bf950a5e49db189cb2b4dda47c5cd85030bf46d7 100644
--- a/tests/script/general/db/alter_tables_d2.sim
+++ b/tests/script/general/db/alter_tables_d2.sim
@@ -211,10 +211,10 @@ endi
 print ============================ step7
 system sh/exec.sh -n dnode1 -s stop -x SIGINT
 system sh/exec.sh -n dnode2 -s stop -x SIGINT
-sleep 1000
+sleep 5000
 system sh/exec.sh -n dnode1 -s start
 system sh/exec.sh -n dnode2 -s start
-sleep 3000
+sleep 5000
 
 sql reset query cache
 sleep 1000
@@ -334,10 +334,10 @@ endi
 print ============================ step10
 system sh/exec.sh -n dnode1 -s stop -x SIGINT
 system sh/exec.sh -n dnode2 -s stop -x SIGINT
-sleep 1000
+sleep 5000
 system sh/exec.sh -n dnode1 -s start
 system sh/exec.sh -n dnode2 -s start
-sleep 3000
+sleep 5000
 
 sql reset query cache
 sleep 1000
diff --git a/tests/script/general/db/alter_tables_v1.sim b/tests/script/general/db/alter_tables_v1.sim
index 17aa746ce37465d1dfb177de544275cd5c00ca65..ccddb8f95926197b25dcf27b9ab0eb24a8b5410f 100644
--- a/tests/script/general/db/alter_tables_v1.sim
+++ b/tests/script/general/db/alter_tables_v1.sim
@@ -143,9 +143,9 @@ endi
 
 print ============================ step7
 system sh/exec.sh -n dnode1 -s stop -x SIGINT
-sleep 1000
+sleep 5000
 system sh/exec.sh -n dnode1 -s start
-sleep 3000
+sleep 5000
 
 sql reset query cache
 sleep 1000
@@ -245,9 +245,9 @@ endi
 
 print ============================ step10
 system sh/exec.sh -n dnode1 -s stop -x SIGINT
-sleep 1000
+sleep 5000
 system sh/exec.sh -n dnode1 -s start
-sleep 3000
+sleep 5000
 
 sql reset query cache
 sleep 1000
diff --git a/tests/script/general/db/alter_tables_v4.sim b/tests/script/general/db/alter_tables_v4.sim
index db00219ed03d20eaf369b4c7386dd1f774cf4417..75687b417e9dd41fb229e12c6478f7bb4fed723d 100644
--- a/tests/script/general/db/alter_tables_v4.sim
+++ b/tests/script/general/db/alter_tables_v4.sim
@@ -204,9 +204,9 @@ endi
 
 print ============================ step7
 system sh/exec.sh -n dnode1 -s stop -x SIGINT
-sleep 1000
+sleep 5000
 system sh/exec.sh -n dnode1 -s start
-sleep 3000
+sleep 5000
 
 sql reset query cache
 sleep 1000
@@ -325,9 +325,9 @@ endi
 
 print ============================ step10
 system sh/exec.sh -n dnode1 -s stop -x SIGINT
-sleep 1000
+sleep 5000
 system sh/exec.sh -n dnode1 -s start
-sleep 3000
+sleep 5000
 
 sql reset query cache
 sleep 1000
diff --git a/tests/script/general/db/alter_vgroups.sim b/tests/script/general/db/alter_vgroups.sim
index 1aae7b93830b5d0ed80e7087af6772cbac1a4947..93f3b1c0e5f25bfc17e2761ff695c3f7d8d27513 100644
--- a/tests/script/general/db/alter_vgroups.sim
+++ b/tests/script/general/db/alter_vgroups.sim
@@ -70,9 +70,9 @@ endi
 print ============================ step3
 system sh/exec.sh -n dnode1 -s stop -x SIGINT
 system sh/cfg.sh -n dnode1 -c numOfTotalVnodes -v 2
-sleep 1000
+sleep 5000
 system sh/exec.sh -n dnode1 -s start
-sleep 3000
+sleep 5000
 
 sql create table db.t100 using db.st tags(0)
 sql create table db.t101 using db.st tags(1)
@@ -132,9 +132,9 @@ print ============================ step5
 
 system sh/exec.sh -n dnode1 -s stop -x SIGINT
 system sh/cfg.sh -n dnode1 -c numOfTotalVnodes -v 3
-sleep 1000
+sleep 5000
 system sh/exec.sh -n dnode1 -s start
-sleep 3000
+sleep 5000
 
 sql create table db.t200 using db.st tags(0)
 sql create table db.t201 using db.st tags(1)
diff --git a/tests/script/general/db/backup/keep.sim b/tests/script/general/db/backup/keep.sim
index 156b32ba4c85764b2a53d77119c61aaff71baefc..29771fc97815c6781cfa3e44fbbfa81760859633 100644
--- a/tests/script/general/db/backup/keep.sim
+++ b/tests/script/general/db/backup/keep.sim
@@ -50,9 +50,9 @@ endi
 
 print ======== step2 stop dnode
 system sh/exec.sh -n dnode2 -s stop -x SIGINT
-sleep 3000
+sleep 5000
 system sh/exec.sh -n dnode2 -s start
-sleep 3000
+sleep 5000
 
 sql select * from tb
 print ===> rows $rows
@@ -112,9 +112,9 @@ endi
 
 print ======== step5 stop dnode
 system sh/exec.sh -n dnode2 -s stop -x SIGINT
-sleep 3000
+sleep 5000
 system sh/exec.sh -n dnode2 -s start
-sleep 3000
+sleep 5000
 
 sql select * from tb
 print ===> rows $rows
diff --git a/tests/script/general/db/delete.sim b/tests/script/general/db/delete.sim
index f95676088bf8a6b9fa67aad863ddf2054f327f86..6d0090a78de2a1847dff4d4df5c9f2fe2f67e983 100644
--- a/tests/script/general/db/delete.sim
+++ b/tests/script/general/db/delete.sim
@@ -43,7 +43,7 @@ endi
 
 print ======= step3
 system sh/exec.sh -n dnode1 -s stop  -x SIGINT
-sleep 1000
+sleep 5000
 system sh/exec.sh -n dnode1 -s start 
 
 $x = 0
diff --git a/tests/script/general/db/dropdnodes.sim b/tests/script/general/db/dropdnodes.sim
index 7ba5e7b66e26a506f6204259a60e8acd69454b6c..be160910c57bf493662a725886ce463b1fe59f4b 100644
--- a/tests/script/general/db/dropdnodes.sim
+++ b/tests/script/general/db/dropdnodes.sim
@@ -70,7 +70,7 @@ endi
 print ========== step3
 
 system sh/exec.sh -n dnode2 -s stop -x SIGINT
-sleep 500
+sleep 5000
 sql drop dnode $hostname2
 sleep 2000
 
@@ -101,4 +101,5 @@ endi
 sql_error select * from db.t1
 sql_error select * from db.t9
 
-system sh/exec.sh -n dnode1 -s stop -x SIGINT
\ No newline at end of file
+system sh/exec.sh -n dnode1 -s stop -x SIGINT
+system sh/exec.sh -n dnode2 -s stop -x SIGINT
\ No newline at end of file
diff --git a/tests/script/general/import/replica1.sim b/tests/script/general/import/replica1.sim
index c212e8723e7430102217403c9a8901fb480010a4..d450b3fb49883df2d83b2969d951b981c30b65af 100644
--- a/tests/script/general/import/replica1.sim
+++ b/tests/script/general/import/replica1.sim
@@ -93,7 +93,7 @@ endi
 
 print ================== dnode restart
 system sh/exec.sh -n dnode1 -s stop -x SIGINT
-sleep 3000
+sleep 5000
 system sh/exec.sh -n dnode1 -s start
 sleep 5000
 
@@ -162,7 +162,7 @@ endi
 
 print ================= step10
 system sh/exec.sh -n dnode1 -s stop -x SIGINT
-sleep 3000
+sleep 5000
 system sh/exec.sh -n dnode1 -s start
 sleep 5000
 
diff --git a/tests/script/general/insert/insert_drop.sim b/tests/script/general/insert/insert_drop.sim
index c688a35557649bcd2e07a9b30dcefe4629f682cd..cf29656067bc237d01141d0e11386d90d1a69f67 100644
--- a/tests/script/general/insert/insert_drop.sim
+++ b/tests/script/general/insert/insert_drop.sim
@@ -43,7 +43,7 @@ print ====== tables created
 
 print ================== restart server to commit data into disk
 system sh/exec.sh -n dnode1 -s stop -x SIGINT
-sleep 3000
+sleep 5000
 system sh/exec.sh -n dnode1 -s start
 print ================== server restart completed
 
@@ -69,7 +69,7 @@ endw
 
 print ================== restart server to commit data into disk
 system sh/exec.sh -n dnode1 -s stop -x SIGINT
-sleep 4000
+sleep 5000
 system sh/exec.sh -n dnode1 -s start
 print ================== server restart completed
 
diff --git a/tests/script/general/parser/auto_create_tb.sim b/tests/script/general/parser/auto_create_tb.sim
index ad65ea723f4ffb47b1596fed432916e1265fcc04..6065daa6d36cee7979f5dcaff7e6784ed9a1d6e3 100644
--- a/tests/script/general/parser/auto_create_tb.sim
+++ b/tests/script/general/parser/auto_create_tb.sim
@@ -208,7 +208,7 @@ endi
 
 print ================== restart server to commit data into disk
 system sh/exec.sh -n dnode1 -s stop -x SIGINT
-sleep 2000
+sleep 5000
 system sh/exec.sh -n dnode1 -s start
 print ================== server restart completed
 sql connect
diff --git a/tests/script/general/parser/commit.sim b/tests/script/general/parser/commit.sim
index f1c980f3dbec5b0c7efc8eaafcbc4df6767d84e0..ecf7113926049de29a27761dc3c317d701a5cebd 100644
--- a/tests/script/general/parser/commit.sim
+++ b/tests/script/general/parser/commit.sim
@@ -81,7 +81,7 @@ endw
 
 print ================== restart server to commit data into disk
 system sh/exec.sh -n dnode1 -s stop -x SIGINT
-sleep 3000
+sleep 5000
 system sh/exec.sh -n dnode1 -s start
 sleep 3000
 print ================== server restart completed
diff --git a/tests/script/general/parser/first_last.sim b/tests/script/general/parser/first_last.sim
index 48288daecae4790ffd221f4a45689557e2ac9e8e..fa2d7675d2c6b249f939e897098ac04d4cd18ab0 100644
--- a/tests/script/general/parser/first_last.sim
+++ b/tests/script/general/parser/first_last.sim
@@ -75,7 +75,7 @@ run general/parser/first_last_query.sim
 
 print ================== restart server to commit data into disk
 system sh/exec.sh -n dnode1 -s stop -x SIGINT
-sleep 3000
+sleep 5000
 system sh/exec.sh -n dnode1 -s start
 print ================== server restart completed
 sql connect
diff --git a/tests/script/general/parser/interp.sim b/tests/script/general/parser/interp.sim
index 4033d1c73575600930bef2c08f8254ea8c7ac4ce..1cd857162d9a764519d2edd6f790f9fd1c083b61 100644
--- a/tests/script/general/parser/interp.sim
+++ b/tests/script/general/parser/interp.sim
@@ -60,7 +60,7 @@ run general/parser/interp_test.sim
 
 print ================== restart server to commit data into disk
 system sh/exec.sh -n dnode1 -s stop -x SIGINT
-sleep 2000
+sleep 5000
 system sh/exec.sh -n dnode1 -s start
 print ================== server restart completed
 
diff --git a/tests/script/general/parser/lastrow.sim b/tests/script/general/parser/lastrow.sim
index 29f535942d6284345b9c84e863ec3b254fd25192..48f6e65a4fa8d41ac64aa08e529f8704f19f3b45 100644
--- a/tests/script/general/parser/lastrow.sim
+++ b/tests/script/general/parser/lastrow.sim
@@ -61,7 +61,7 @@ run general/parser/lastrow_query.sim
 
 print ================== restart server to commit data into disk
 system sh/exec.sh -n dnode1 -s stop -x SIGINT
-sleep 3000
+sleep 5000
 system sh/exec.sh -n dnode1 -s start
 print ================== server restart completed
 sql connect
diff --git a/tests/script/general/parser/limit.sim b/tests/script/general/parser/limit.sim
index e3e952bdd3e56a61eff32ea301c8f403eda186ff..2129c6b82ab1170a69e240a85d1b55a0e9c1190c 100644
--- a/tests/script/general/parser/limit.sim
+++ b/tests/script/general/parser/limit.sim
@@ -61,7 +61,7 @@ run general/parser/limit_stb.sim
 
 print ================== restart server to commit data into disk
 system sh/exec.sh -n dnode1 -s stop -x SIGINT
-sleep 2000
+sleep 5000
 system sh/exec.sh -n dnode1 -s start
 print ================== server restart completed
 sql connect
diff --git a/tests/script/general/parser/limit1.sim b/tests/script/general/parser/limit1.sim
index 48fb6aaedeef38ed26fc0cde92d5b7869afcb3ba..84b760ced940de7f63f5e5497dfce92b30a5a1b7 100644
--- a/tests/script/general/parser/limit1.sim
+++ b/tests/script/general/parser/limit1.sim
@@ -61,7 +61,7 @@ run general/parser/limit1_stb.sim
 
 print ================== restart server to commit data into disk
 system sh/exec.sh -n dnode1 -s stop -x SIGINT
-sleep 2000
+sleep 5000
 system sh/exec.sh -n dnode1 -s start
 print ================== server restart completed
 
diff --git a/tests/script/general/parser/limit1_tblocks100.sim b/tests/script/general/parser/limit1_tblocks100.sim
index 126c3227a7eb21852f8fcf23333a99a20e6a1763..99ffd31f6dbb405876c9a00b5d903469ab445a20 100644
--- a/tests/script/general/parser/limit1_tblocks100.sim
+++ b/tests/script/general/parser/limit1_tblocks100.sim
@@ -61,7 +61,7 @@ run general/parser/limit1_stb.sim
 
 print ================== restart server to commit data into disk
 system sh/exec.sh -n dnode1 -s stop -x SIGINT
-sleep 2000
+sleep 5000
 system sh/exec.sh -n dnode1 -s start
 print ================== server restart completed
 
diff --git a/tests/script/general/parser/limit2.sim b/tests/script/general/parser/limit2.sim
index 5f71232585dbd9a3aa3551e0bf5e10d3fd89df8f..d16ee29cf789f2e1fe362ee32db8fc10f823ae3e 100644
--- a/tests/script/general/parser/limit2.sim
+++ b/tests/script/general/parser/limit2.sim
@@ -71,7 +71,7 @@ print ================== restart server to commit data into disk
 system sh/exec.sh -n dnode1 -s stop -x SIGINT
 
 return
-sleep 3000
+sleep 5000
 system sh/exec.sh -n dnode1 -s start
 print ================== server restart completed
 
diff --git a/tests/script/general/parser/select_from_cache_disk.sim b/tests/script/general/parser/select_from_cache_disk.sim
index 9ffdf817d732d0600ec02618eddc19d7deb75305..629d4567614a610c4bc41090aaafd7f625ad205c 100644
--- a/tests/script/general/parser/select_from_cache_disk.sim
+++ b/tests/script/general/parser/select_from_cache_disk.sim
@@ -36,7 +36,7 @@ sql insert into $tb values ('2018-09-17 09:00:00.030', 3)
 
 print ================== restart server to commit data into disk
 system sh/exec.sh -n dnode1 -s stop -x SIGINT
-sleep 3000
+sleep 5000
 system sh/exec.sh -n dnode1 -s start
 print ================== server restart completed
 sql connect
diff --git a/tests/script/general/parser/single_row_in_tb.sim b/tests/script/general/parser/single_row_in_tb.sim
index 200047140e8ea85b972ba46a5e7f113561b77f01..2313a98b41b0075c8acd6441d9cd7efb6273fea0 100644
--- a/tests/script/general/parser/single_row_in_tb.sim
+++ b/tests/script/general/parser/single_row_in_tb.sim
@@ -31,7 +31,7 @@ run general/parser/single_row_in_tb_query.sim
 
 print ================== restart server to commit data into disk
 system sh/exec.sh -n dnode1 -s stop -x SIGINT
-sleep 2000
+sleep 5000
 system sh/exec.sh -n dnode1 -s start
 print ================== server restart completed
 
diff --git a/tests/script/general/parser/slimit.sim b/tests/script/general/parser/slimit.sim
index be63f91803a2857c2afadc52d995263544b2f3a8..3d28ac3d5429a9753d13db777013019859e359a8 100644
--- a/tests/script/general/parser/slimit.sim
+++ b/tests/script/general/parser/slimit.sim
@@ -98,7 +98,7 @@ run general/parser/slimit_query.sim
 
 print ================== restart server to commit data into disk
 system sh/exec.sh -n dnode1 -s stop -x SIGINT
-sleep 3000
+sleep 5000
 system sh/exec.sh -n dnode1 -s start
 print ================== server restart completed
 sql connect
diff --git a/tests/script/general/parser/slimit1.sim b/tests/script/general/parser/slimit1.sim
index b987a6852ba0cf64c35888e4984aaa140eb51674..05e34bc7f41e7bd807ce81fcbfe00ae5e0026776 100644
--- a/tests/script/general/parser/slimit1.sim
+++ b/tests/script/general/parser/slimit1.sim
@@ -57,7 +57,7 @@ run general/parser/slimit1_query.sim
 
 print ================== restart server to commit data into disk
 system sh/exec.sh -n dnode1 -s stop -x SIGINT
-sleep 3000
+sleep 5000
 system sh/exec.sh -n dnode1 -s start
 print ================== server restart completed
 sql connect
diff --git a/tests/script/general/parser/slimit_alter_tags.sim b/tests/script/general/parser/slimit_alter_tags.sim
index b8397f950c37e8fcdb083f931111b508ddaf7671..54bc868f6a975ede6f1031a9560b444bd491acad 100644
--- a/tests/script/general/parser/slimit_alter_tags.sim
+++ b/tests/script/general/parser/slimit_alter_tags.sim
@@ -170,7 +170,7 @@ endi
 
 print ================== restart server to commit data into disk
 system sh/exec.sh -n dnode1 -s stop -x SIGINT
-sleep 2000
+sleep 5000
 system sh/exec.sh -n dnode1 -s start
 print ================== server restart completed
 sql connect
diff --git a/tests/script/general/parser/tbnameIn.sim b/tests/script/general/parser/tbnameIn.sim
index 16302888d078c3b9eaefd6746c54ed0ab48673b6..fd5f32972ad9e0d0f89875d1f89d2734fd2cbdd8 100644
--- a/tests/script/general/parser/tbnameIn.sim
+++ b/tests/script/general/parser/tbnameIn.sim
@@ -68,7 +68,7 @@ run general/parser/tbnameIn_query.sim
 
 print ================== restart server to commit data into disk
 system sh/exec.sh -n dnode1 -s stop -x SIGINT
-sleep 2000
+sleep 5000
 system sh/exec.sh -n dnode1 -s start
 print ================== server restart completed
 
diff --git a/tests/script/general/stable/disk.sim b/tests/script/general/stable/disk.sim
index 0865719a147c2ecde394af0b5758b73909b1d53a..c7ddfb0591f14db7d11af779048a3fb50b6e2c34 100644
--- a/tests/script/general/stable/disk.sim
+++ b/tests/script/general/stable/disk.sim
@@ -58,7 +58,7 @@ endi
 
 sleep 1000
 system sh/exec.sh -n dnode1 -s stop -x SIGINT
-sleep 3000
+sleep 5000
 system sh/exec.sh -n dnode1 -s start
 sleep 6000
 
diff --git a/tests/script/general/stable/dnode3.sim b/tests/script/general/stable/dnode3.sim
index 38d05a924b819acb5551924c613f8b827a322b6e..7e85641598070b9a63b85245f3b49720c168dc6d 100644
--- a/tests/script/general/stable/dnode3.sim
+++ b/tests/script/general/stable/dnode3.sim
@@ -213,11 +213,4 @@ if $rows != 0 then
   return -1
 endi
 
-system sh/exec.sh -n dnode1 -s stop  -x SIGINT
-system sh/exec.sh -n dnode2 -s stop  -x SIGINT
-system sh/exec.sh -n dnode3 -s stop  -x SIGINT
-system sh/exec.sh -n dnode4 -s stop  -x SIGINT
-system sh/exec.sh -n dnode5 -s stop  -x SIGINT
-system sh/exec.sh -n dnode6 -s stop  -x SIGINT
-system sh/exec.sh -n dnode7 -s stop  -x SIGINT
-system sh/exec.sh -n dnode8 -s stop  -x SIGINT
\ No newline at end of file
+system sh/exec.sh -n dnode1 -s stop  -x SIGINT
\ No newline at end of file
diff --git a/tests/script/general/tag/commit.sim b/tests/script/general/tag/commit.sim
index 94dc13f0cff9b6dc62024ce4f6138fe4f5f38311..fca94ee7d41b58c40128a2bf2774782572c83934 100644
--- a/tests/script/general/tag/commit.sim
+++ b/tests/script/general/tag/commit.sim
@@ -824,7 +824,7 @@ endi
 system sh/exec.sh -n dnode1 -s stop -x SIGINT
 sleep 5000
 system sh/exec.sh -n dnode1 -s start
-sleep 3000
+sleep 5000
 
 print =============== step1
 $i = 0
diff --git a/tests/script/unique/arbitrator/dn3_mn1_replica_change_dropDnod.sim b/tests/script/unique/arbitrator/dn3_mn1_replica_change_dropDnod.sim
new file mode 100644
index 0000000000000000000000000000000000000000..a7aaf018f13ef9dadf26350598af3722726341e6
--- /dev/null
+++ b/tests/script/unique/arbitrator/dn3_mn1_replica_change_dropDnod.sim
@@ -0,0 +1,137 @@
+system sh/stop_dnodes.sh
+system sh/deploy.sh -n dnode1 -i 1
+system sh/deploy.sh -n dnode2 -i 2
+system sh/deploy.sh -n dnode3 -i 3
+system sh/deploy.sh -n dnode4 -i 4
+
+system sh/cfg.sh -n dnode1 -c numOfMnodes -v 1
+system sh/cfg.sh -n dnode2 -c numOfMnodes -v 1
+system sh/cfg.sh -n dnode3 -c numOfMnodes -v 1
+
+system sh/cfg.sh -n dnode1 -c walLevel -v 2
+system sh/cfg.sh -n dnode2 -c walLevel -v 2
+system sh/cfg.sh -n dnode3 -c walLevel -v 2
+system sh/cfg.sh -n dnode4 -c walLevel -v 2
+
+system sh/cfg.sh -n dnode1 -c balanceInterval -v 10
+system sh/cfg.sh -n dnode2 -c balanceInterval -v 10
+system sh/cfg.sh -n dnode3 -c balanceInterval -v 10
+system sh/cfg.sh -n dnode4 -c balanceInterval -v 10
+
+system sh/cfg.sh -n dnode1 -c numOfTotalVnodes -v 4
+system sh/cfg.sh -n dnode2 -c numOfTotalVnodes -v 4
+system sh/cfg.sh -n dnode3 -c numOfTotalVnodes -v 4
+system sh/cfg.sh -n dnode4 -c numOfTotalVnodes -v 4
+
+system sh/cfg.sh -n dnode1 -c alternativeRole -v 1
+system sh/cfg.sh -n dnode2 -c alternativeRole -v 2
+system sh/cfg.sh -n dnode3 -c alternativeRole -v 2
+system sh/cfg.sh -n dnode4 -c alternativeRole -v 2
+
+system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v 4
+system sh/cfg.sh -n dnode2 -c maxtablesPerVnode -v 4
+system sh/cfg.sh -n dnode3 -c maxtablesPerVnode -v 4
+system sh/cfg.sh -n dnode4 -c maxtablesPerVnode -v 4
+system sh/cfg.sh -n dnode5 -c maxtablesPerVnode -v 4
+
+system sh/cfg.sh -n dnode1 -c arbitrator -v $arbitrator
+system sh/cfg.sh -n dnode2 -c arbitrator -v $arbitrator
+system sh/cfg.sh -n dnode3 -c arbitrator -v $arbitrator
+
+print ============== step0: start tarbitrator
+system sh/exec_tarbitrator.sh -s start
+
+print ============== step1: start dnode1, only deploy mnode
+system sh/exec.sh -n dnode1 -s start
+sleep 3000
+sql connect
+
+print ============== step2: start dnode2/dnode3/dnode4 and add into cluster , then create database with replica 2, and create table, insert data
+system sh/exec.sh -n dnode2 -s start
+system sh/exec.sh -n dnode3 -s start
+system sh/exec.sh -n dnode4 -s start
+sql create dnode $hostname2
+sql create dnode $hostname3
+sql create dnode $hostname4
+sleep 3000
+
+$totalTableNum = 10000
+$sleepTimer = 10000
+
+$db = db
+sql create database $db replica 2 maxTables $totalTableNum
+sql use $db
+
+# create table , insert data
+$stb = stb
+sql create table $stb (ts timestamp, c1 int) tags(t1 int)
+$rowNum = 100
+$tblNum = $totalTableNum
+$totalRows = 0
+$tsStart = 1420041600000
+
+$i = 0
+while $i < $tblNum
+  $tb = tb . $i
+  sql create table $tb using $stb tags( $i )
+ 
+  $x = 0
+  while $x < $rowNum
+    $ts = $tsStart + $x
+    sql insert into $tb values ( $ts + 0a , $x ) ( $ts + 1a , $x ) ( $ts + 2a , $x ) ( $ts + 3a , $x ) ( $ts + 4a , $x ) ( $ts + 5a , $x ) ( $ts + 6a , $x ) ( $ts + 7a , $x ) ( $ts + 8a , $x ) ( $ts + 9a , $x ) ( $ts + 10a , $x ) ( $ts + 11a , $x ) ( $ts + 12a , $x ) ( $ts + 13a , $x ) ( $ts + 14a , $x ) ( $ts + 15a , $x ) ( $ts + 16a , $x ) ( $ts + 17a , $x ) ( $ts + 18a , $x ) ( $ts + 19a , $x ) ( $ts + 20a , $x ) ( $ts + 21a , $x ) ( $ts + 22a , $x ) ( $ts + 23a , $x ) ( $ts + 24a , $x ) ( $ts + 25a , $x ) ( $ts + 26a , $x ) ( $ts + 27a , $x ) ( $ts + 28a , $x ) ( $ts + 29a , $x ) ( $ts + 30a , $x ) ( $ts + 31a , $x ) ( $ts + 32a , $x ) ( $ts + 33a , $x ) ( $ts + 34a , $x ) ( $ts + 25a , $x ) ( $ts + 26a , $x ) ( $ts + 27a , $x ) ( $ts + 28a , $x ) ( $ts + 29a , $x ) ( $ts + 30a , $x ) ( $ts + 31a , $x ) ( $ts + 32a , $x ) ( $ts + 33a , $x ) ( $ts + 34a , $x ) ( $ts + 35a , $x ) ( $ts + 36a , $x ) ( $ts + 37a , $x ) ( $ts + 38a , $x ) ( $ts + 39a , $x ) ( $ts + 40a , $x ) ( $ts + 41a , $x ) ( $ts + 42a , $x ) ( $ts + 43a , $x ) ( $ts + 44a , $x ) ( $ts + 45a , $x ) ( $ts + 46a , $x ) ( $ts + 47a , $x ) ( $ts + 48a , $x ) ( $ts + 49a , $x ) ( $ts + 50a , $x ) ( $ts + 51a , $x ) ( $ts + 52a , $x ) ( $ts + 53a , $x ) ( $ts + 54a , $x ) ( $ts + 55a , $x ) ( $ts + 56a , $x ) ( $ts + 57a , $x ) ( $ts + 58a , $x ) ( $ts + 59a , $x ) 
+    $x = $x + 60
+  endw 
+  $totalRows = $totalRows + $x
+  print       info: inserted $x rows into $tb and totalRows: $totalRows
+  $i = $i + 1
+endw 
+
+sql select count(*) from $stb
+sleep 1000
+print data00 $data00
+if $data00 != $totalRows then
+	return -1
+endi
+
+print ============== step3: drop dnode4, then check rows
+#system sh/exec.sh -n dnode4 -s stop -x SIGINT
+sql drop dnode $hostname4
+sleep $sleepTimer
+
+wait_dnode4_dropped:
+sql show dnodes
+if $rows != 3 then
+  sleep 2000
+  goto wait_dnode4_dropped
+endi
+print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1
+print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2
+print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3
+#print $data0_4  $data1_4  $data2_4  $data3_4  $data4_4
+#print $data0_5  $data1_5  $data2_5  $data3_5  $data4_5
+#print $data0_6  $data1_6  $data2_6  $data3_6  $data4_6
+#$dnode1Status = $data4_1  
+$dnode2Status = $data4_2
+$dnode3Status = $data4_3  
+$dnode4Status = $data4_4 
+#$dnode5Status = $data4_5
+
+if $dnode2Status != ready then
+  sleep 2000
+  goto wait_dnode4_dropped
+endi
+if $dnode3Status != ready then
+  sleep 2000
+  goto wait_dnode4_dropped
+endi
+
+sql reset query cache
+sql select count(*) from $stb
+sleep 1000
+print data00 $data00
+if $data00 != $totalRows then
+	return -1
+endi
+
+print      drop dnode $hostname3, return error: not drop dnode for repica is 2, need 2 dnodes.
+sql_error drop dnode $hostname3
diff --git a/tests/script/unique/arbitrator/dn3_mn1_vnode_corruptFile_offline.sim b/tests/script/unique/arbitrator/dn3_mn1_vnode_corruptFile_offline.sim
new file mode 100644
index 0000000000000000000000000000000000000000..9f6486cfcb80531c902892b9e853ed9b172d42cb
--- /dev/null
+++ b/tests/script/unique/arbitrator/dn3_mn1_vnode_corruptFile_offline.sim
@@ -0,0 +1,226 @@
+system sh/stop_dnodes.sh
+system sh/deploy.sh -n dnode1 -i 1
+system sh/deploy.sh -n dnode2 -i 2
+system sh/deploy.sh -n dnode3 -i 3
+system sh/deploy.sh -n dnode4 -i 4
+
+system sh/cfg.sh -n dnode1 -c numOfMnodes -v 1
+system sh/cfg.sh -n dnode2 -c numOfMnodes -v 1
+system sh/cfg.sh -n dnode3 -c numOfMnodes -v 1
+
+system sh/cfg.sh -n dnode1 -c walLevel -v 2
+system sh/cfg.sh -n dnode2 -c walLevel -v 2
+system sh/cfg.sh -n dnode3 -c walLevel -v 2
+system sh/cfg.sh -n dnode4 -c walLevel -v 2
+
+system sh/cfg.sh -n dnode1 -c balanceInterval -v 10
+system sh/cfg.sh -n dnode2 -c balanceInterval -v 10
+system sh/cfg.sh -n dnode3 -c balanceInterval -v 10
+system sh/cfg.sh -n dnode4 -c balanceInterval -v 10
+
+system sh/cfg.sh -n dnode1 -c numOfTotalVnodes -v 4
+system sh/cfg.sh -n dnode2 -c numOfTotalVnodes -v 4
+system sh/cfg.sh -n dnode3 -c numOfTotalVnodes -v 4
+system sh/cfg.sh -n dnode4 -c numOfTotalVnodes -v 4
+
+system sh/cfg.sh -n dnode1 -c alternativeRole -v 1
+system sh/cfg.sh -n dnode2 -c alternativeRole -v 2
+system sh/cfg.sh -n dnode3 -c alternativeRole -v 2
+system sh/cfg.sh -n dnode4 -c alternativeRole -v 2
+
+system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v 4
+system sh/cfg.sh -n dnode2 -c maxtablesPerVnode -v 4
+system sh/cfg.sh -n dnode3 -c maxtablesPerVnode -v 4
+system sh/cfg.sh -n dnode4 -c maxtablesPerVnode -v 4
+system sh/cfg.sh -n dnode5 -c maxtablesPerVnode -v 4
+
+system sh/cfg.sh -n dnode1 -c arbitrator -v $arbitrator
+system sh/cfg.sh -n dnode2 -c arbitrator -v $arbitrator
+system sh/cfg.sh -n dnode3 -c arbitrator -v $arbitrator
+
+print ============== step0: start tarbitrator
+system sh/exec_tarbitrator.sh -s start
+
+print ============== step1: start dnode1, only deploy mnode
+system sh/exec.sh -n dnode1 -s start
+sleep 3000
+sql connect
+
+print ============== step2: start dnode2/dnode3 and add into cluster , then create database with replica 2, and create table, insert data
+system sh/exec.sh -n dnode2 -s start
+system sh/exec.sh -n dnode3 -s start
+#system sh/exec.sh -n dnode4 -s start
+sql create dnode $hostname2
+sql create dnode $hostname3
+#sql create dnode $hostname4
+sleep 3000
+
+$totalTableNum = 100
+$sleepTimer = 3000
+
+$db = db
+sql create database $db replica 3 maxTables $totalTableNum
+sql use $db
+
+# create table , insert data
+$stb = stb
+sql create table $stb (ts timestamp, c1 int) tags(t1 int)
+$rowNum = 100
+$tblNum = $totalTableNum
+$totalRows = 0
+$tsStart = 1420041600000
+
+$i = 0
+while $i < $tblNum
+  $tb = tb . $i
+  sql create table $tb using $stb tags( $i )
+ 
+  $x = 0
+  while $x < $rowNum
+    $ts = $tsStart + $x
+    sql insert into $tb values ( $ts + 0a , $x ) ( $ts + 1a , $x ) ( $ts + 2a , $x ) ( $ts + 3a , $x ) ( $ts + 4a , $x ) ( $ts + 5a , $x ) ( $ts + 6a , $x ) ( $ts + 7a , $x ) ( $ts + 8a , $x ) ( $ts + 9a , $x ) ( $ts + 10a , $x ) ( $ts + 11a , $x ) ( $ts + 12a , $x ) ( $ts + 13a , $x ) ( $ts + 14a , $x ) ( $ts + 15a , $x ) ( $ts + 16a , $x ) ( $ts + 17a , $x ) ( $ts + 18a , $x ) ( $ts + 19a , $x ) ( $ts + 20a , $x ) ( $ts + 21a , $x ) ( $ts + 22a , $x ) ( $ts + 23a , $x ) ( $ts + 24a , $x ) ( $ts + 25a , $x ) ( $ts + 26a , $x ) ( $ts + 27a , $x ) ( $ts + 28a , $x ) ( $ts + 29a , $x ) ( $ts + 30a , $x ) ( $ts + 31a , $x ) ( $ts + 32a , $x ) ( $ts + 33a , $x ) ( $ts + 34a , $x ) ( $ts + 25a , $x ) ( $ts + 26a , $x ) ( $ts + 27a , $x ) ( $ts + 28a , $x ) ( $ts + 29a , $x ) ( $ts + 30a , $x ) ( $ts + 31a , $x ) ( $ts + 32a , $x ) ( $ts + 33a , $x ) ( $ts + 34a , $x ) ( $ts + 35a , $x ) ( $ts + 36a , $x ) ( $ts + 37a , $x ) ( $ts + 38a , $x ) ( $ts + 39a , $x ) ( $ts + 40a , $x ) ( $ts + 41a , $x ) ( $ts + 42a , $x ) ( $ts + 43a , $x ) ( $ts + 44a , $x ) ( $ts + 45a , $x ) ( $ts + 46a , $x ) ( $ts + 47a , $x ) ( $ts + 48a , $x ) ( $ts + 49a , $x ) ( $ts + 50a , $x ) ( $ts + 51a , $x ) ( $ts + 52a , $x ) ( $ts + 53a , $x ) ( $ts + 54a , $x ) ( $ts + 55a , $x ) ( $ts + 56a , $x ) ( $ts + 57a , $x ) ( $ts + 58a , $x ) ( $ts + 59a , $x ) 
+    $x = $x + 60
+  endw 
+  $totalRows = $totalRows + $x
+  print       info: inserted $x rows into $tb and totalRows: $totalRows
+  $i = $i + 1
+endw 
+
+sql select count(*) from $stb
+sleep 1000
+print data00 $data00
+if $data00 != $totalRows then
+	return -1
+endi
+
+print ============== step3: stop dnode3, then corrupt vnode data file in dnode3
+system sh/exec.sh -n dnode3 -s stop -x SIGINT
+sleep $sleepTimer
+wait_dnode3_offline_0:
+sql show dnodes
+if $rows != 3 then
+  sleep 2000
+  goto wait_dnode3_offline_0
+endi
+print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1
+print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2
+print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3
+#print $data0_4  $data1_4  $data2_4  $data3_4  $data4_4
+#print $data0_5  $data1_5  $data2_5  $data3_5  $data4_5
+#print $data0_6  $data1_6  $data2_6  $data3_6  $data4_6
+#$dnode1Status = $data4_1  
+$dnode2Status = $data4_2
+$dnode3Status = $data4_3  
+$dnode4Status = $data4_4 
+#$dnode5Status = $data4_5
+
+if $dnode3Status != offline then
+  sleep 2000
+  goto wait_dnode3_offline_0
+endi
+
+wait_dnode3_vgroup_offline:
+sql show vgroups
+if $rows != 1 then
+  sleep 2000
+  goto wait_dnode3_vgroup_offline
+endi
+print show vgroups:
+print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
+print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
+print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
+$dnode3Vtatus = $data4_2
+$dnode2Vtatus = $data7_2
+
+if $dnode3Vtatus != offline then
+  sleep 2000
+  goto wait_dnode3_vgroup_offline
+endi
+if $dnode2Vtatus != master then
+  sleep 2000
+  goto wait_dnode3_vgroup_offline
+endi
+
+# del the second row
+system sed '2d' ../../../sim/dnode3/data/vnode/vnode2/tsdb/data/v1849.data
+sleep 1000
+
+print ============== step4: restart dnode3, and run query 
+system sh/exec.sh -n dnode3 -s start
+sleep $sleepTimer
+wait_dnode3_reready:
+sql show dnodes
+if $rows != 3 then
+  sleep 2000
+  goto wait_dnode3_reready
+endi
+print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1
+print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2
+print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3
+#print $data0_4  $data1_4  $data2_4  $data3_4  $data4_4
+#print $data0_5  $data1_5  $data2_5  $data3_5  $data4_5
+#print $data0_6  $data1_6  $data2_6  $data3_6  $data4_6
+#$dnode1Status = $data4_1  
+$dnode2Status = $data4_2
+$dnode3Status = $data4_3  
+$dnode4Status = $data4_4 
+#$dnode5Status = $data4_5
+
+if $dnode3Status != ready then
+  sleep 2000
+  goto wait_dnode4_reready
+endi
+
+sql select count(*) from $stb
+print data00 $data00
+if $data00 != $totalRows then
+	return -1
+endi
+
+print ============== step5: stop dnode2, and check if dnode3 sync success
+system sh/exec.sh -n dnode2 -s stop -x SIGINT
+sleep $sleepTimer
+wait_dnode2_offline_0:
+sql show dnodes
+if $rows != 3 then
+  sleep 2000
+  goto wait_dnode2_offline_0
+endi
+print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1
+print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2
+print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3
+#print $data0_4  $data1_4  $data2_4  $data3_4  $data4_4
+#print $data0_5  $data1_5  $data2_5  $data3_5  $data4_5
+#print $data0_6  $data1_6  $data2_6  $data3_6  $data4_6
+#$dnode1Status = $data4_1  
+$dnode2Status = $data4_2
+$dnode3Status = $data4_3  
+$dnode4Status = $data4_4 
+#$dnode5Status = $data4_5
+
+if $dnode2Status != offline then
+  sleep 2000
+  goto wait_dnode2_offline_0
+endi
+
+wait_dnode3_vgroup_master:
+sql show vgroups
+if $rows != 1 then
+  sleep 2000
+  goto wait_dnode3_vgroup_master
+endi
+print show vgroups:
+print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
+print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
+print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
+$dnode2Vtatus = $data4_2
+$dnode3Vtatus = $data7_2
+
+if $dnode2Vtatus != offline then
+  sleep 2000
+  goto wait_dnode3_vgroup_master
+endi
+if $dnode3Vtatus != master then
+  sleep 2000
+  goto wait_dnode3_vgroup_master
+endi
diff --git a/tests/script/unique/arbitrator/dn3_mn1_vnode_corruptFile_online.sim b/tests/script/unique/arbitrator/dn3_mn1_vnode_corruptFile_online.sim
new file mode 100644
index 0000000000000000000000000000000000000000..b3b71ccf51123b97db474ccaf3415c10b9aff946
--- /dev/null
+++ b/tests/script/unique/arbitrator/dn3_mn1_vnode_corruptFile_online.sim
@@ -0,0 +1,154 @@
+system sh/stop_dnodes.sh
+system sh/deploy.sh -n dnode1 -i 1
+system sh/deploy.sh -n dnode2 -i 2
+system sh/deploy.sh -n dnode3 -i 3
+system sh/deploy.sh -n dnode4 -i 4
+
+system sh/cfg.sh -n dnode1 -c numOfMnodes -v 1
+system sh/cfg.sh -n dnode2 -c numOfMnodes -v 1
+system sh/cfg.sh -n dnode3 -c numOfMnodes -v 1
+
+system sh/cfg.sh -n dnode1 -c walLevel -v 2
+system sh/cfg.sh -n dnode2 -c walLevel -v 2
+system sh/cfg.sh -n dnode3 -c walLevel -v 2
+system sh/cfg.sh -n dnode4 -c walLevel -v 2
+
+system sh/cfg.sh -n dnode1 -c balanceInterval -v 10
+system sh/cfg.sh -n dnode2 -c balanceInterval -v 10
+system sh/cfg.sh -n dnode3 -c balanceInterval -v 10
+system sh/cfg.sh -n dnode4 -c balanceInterval -v 10
+
+system sh/cfg.sh -n dnode1 -c numOfTotalVnodes -v 4
+system sh/cfg.sh -n dnode2 -c numOfTotalVnodes -v 4
+system sh/cfg.sh -n dnode3 -c numOfTotalVnodes -v 4
+system sh/cfg.sh -n dnode4 -c numOfTotalVnodes -v 4
+
+system sh/cfg.sh -n dnode1 -c alternativeRole -v 1
+system sh/cfg.sh -n dnode2 -c alternativeRole -v 2
+system sh/cfg.sh -n dnode3 -c alternativeRole -v 2
+system sh/cfg.sh -n dnode4 -c alternativeRole -v 2
+
+system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v 4
+system sh/cfg.sh -n dnode2 -c maxtablesPerVnode -v 4
+system sh/cfg.sh -n dnode3 -c maxtablesPerVnode -v 4
+system sh/cfg.sh -n dnode4 -c maxtablesPerVnode -v 4
+system sh/cfg.sh -n dnode5 -c maxtablesPerVnode -v 4
+
+system sh/cfg.sh -n dnode1 -c arbitrator -v $arbitrator
+system sh/cfg.sh -n dnode2 -c arbitrator -v $arbitrator
+system sh/cfg.sh -n dnode3 -c arbitrator -v $arbitrator
+
+print ============== step0: start tarbitrator
+system sh/exec_tarbitrator.sh -s start
+
+print ============== step1: start dnode1, only deploy mnode
+system sh/exec.sh -n dnode1 -s start
+sleep 3000
+sql connect
+
+print ============== step2: start dnode2/dnode3 and add into cluster , then create database with replica 2, and create table, insert data
+system sh/exec.sh -n dnode2 -s start
+system sh/exec.sh -n dnode3 -s start
+#system sh/exec.sh -n dnode4 -s start
+sql create dnode $hostname2
+sql create dnode $hostname3
+#sql create dnode $hostname4
+sleep 3000
+
+$totalTableNum = 100
+$sleepTimer = 3000
+
+$db = db
+sql create database $db replica 3 maxTables $totalTableNum
+sql use $db
+
+# create table , insert data
+$stb = stb
+sql create table $stb (ts timestamp, c1 int) tags(t1 int)
+$rowNum = 100
+$tblNum = $totalTableNum
+$totalRows = 0
+$tsStart = 1420041600000
+
+$i = 0
+while $i < $tblNum
+  $tb = tb . $i
+  sql create table $tb using $stb tags( $i )
+ 
+  $x = 0
+  while $x < $rowNum
+    $ts = $tsStart + $x
+    sql insert into $tb values ( $ts + 0a , $x ) ( $ts + 1a , $x ) ( $ts + 2a , $x ) ( $ts + 3a , $x ) ( $ts + 4a , $x ) ( $ts + 5a , $x ) ( $ts + 6a , $x ) ( $ts + 7a , $x ) ( $ts + 8a , $x ) ( $ts + 9a , $x ) ( $ts + 10a , $x ) ( $ts + 11a , $x ) ( $ts + 12a , $x ) ( $ts + 13a , $x ) ( $ts + 14a , $x ) ( $ts + 15a , $x ) ( $ts + 16a , $x ) ( $ts + 17a , $x ) ( $ts + 18a , $x ) ( $ts + 19a , $x ) ( $ts + 20a , $x ) ( $ts + 21a , $x ) ( $ts + 22a , $x ) ( $ts + 23a , $x ) ( $ts + 24a , $x ) ( $ts + 25a , $x ) ( $ts + 26a , $x ) ( $ts + 27a , $x ) ( $ts + 28a , $x ) ( $ts + 29a , $x ) ( $ts + 30a , $x ) ( $ts + 31a , $x ) ( $ts + 32a , $x ) ( $ts + 33a , $x ) ( $ts + 34a , $x ) ( $ts + 25a , $x ) ( $ts + 26a , $x ) ( $ts + 27a , $x ) ( $ts + 28a , $x ) ( $ts + 29a , $x ) ( $ts + 30a , $x ) ( $ts + 31a , $x ) ( $ts + 32a , $x ) ( $ts + 33a , $x ) ( $ts + 34a , $x ) ( $ts + 35a , $x ) ( $ts + 36a , $x ) ( $ts + 37a , $x ) ( $ts + 38a , $x ) ( $ts + 39a , $x ) ( $ts + 40a , $x ) ( $ts + 41a , $x ) ( $ts + 42a , $x ) ( $ts + 43a , $x ) ( $ts + 44a , $x ) ( $ts + 45a , $x ) ( $ts + 46a , $x ) ( $ts + 47a , $x ) ( $ts + 48a , $x ) ( $ts + 49a , $x ) ( $ts + 50a , $x ) ( $ts + 51a , $x ) ( $ts + 52a , $x ) ( $ts + 53a , $x ) ( $ts + 54a , $x ) ( $ts + 55a , $x ) ( $ts + 56a , $x ) ( $ts + 57a , $x ) ( $ts + 58a , $x ) ( $ts + 59a , $x ) 
+    $x = $x + 60
+  endw 
+  $totalRows = $totalRows + $x
+  print       info: inserted $x rows into $tb and totalRows: $totalRows
+  $i = $i + 1
+endw 
+
+sql select count(*) from $stb
+sleep 1000
+print data00 $data00
+if $data00 != $totalRows then
+	return -1
+endi
+
+print ============== step3: corrupt vnode data file in dnode3, not stop dnode3
+# del the second row
+system sed '2d' ../../../sim/dnode3/data/vnode/vnode2/tsdb/data/v1849.data
+sleep 1000
+
+print ============== step4: run query 
+sql select count(*) from $stb
+print data00 $data00
+if $data00 != $totalRows then
+	return -1
+endi
+
+print ============== step5: stop dnode2, and check if dnode3 sync success
+system sh/exec.sh -n dnode2 -s stop -x SIGINT
+sleep $sleepTimer
+wait_dnode2_offline_0:
+sql show dnodes
+if $rows != 3 then
+  sleep 2000
+  goto wait_dnode2_offline_0
+endi
+print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1
+print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2
+print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3
+#print $data0_4  $data1_4  $data2_4  $data3_4  $data4_4
+#print $data0_5  $data1_5  $data2_5  $data3_5  $data4_5
+#print $data0_6  $data1_6  $data2_6  $data3_6  $data4_6
+#$dnode1Status = $data4_1  
+$dnode2Status = $data4_2
+$dnode3Status = $data4_3  
+$dnode4Status = $data4_4 
+#$dnode5Status = $data4_5
+
+if $dnode2Status != offline then
+  sleep 2000
+  goto wait_dnode2_offline_0
+endi
+
+wait_dnode3_vgroup_master:
+sql show vgroups
+if $rows != 1 then
+  sleep 2000
+  goto wait_dnode3_vgroup_master
+endi
+print show vgroups:
+print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
+print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
+print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
+$dnode2Vtatus = $data4_2
+$dnode3Vtatus = $data7_2
+
+if $dnode2Vtatus != offline then
+  sleep 2000
+  goto wait_dnode3_vgroup_master
+endi
+if $dnode3Vtatus != master then
+  sleep 2000
+  goto wait_dnode3_vgroup_master
+endi
diff --git a/tests/script/unique/arbitrator/dn3_mn1_vnode_delDir.sim b/tests/script/unique/arbitrator/dn3_mn1_vnode_delDir.sim
new file mode 100644
index 0000000000000000000000000000000000000000..46b4023aa2ebae2a70ce81465ba9c435e8d8556a
--- /dev/null
+++ b/tests/script/unique/arbitrator/dn3_mn1_vnode_delDir.sim
@@ -0,0 +1,273 @@
+system sh/stop_dnodes.sh
+system sh/deploy.sh -n dnode1 -i 1
+system sh/deploy.sh -n dnode2 -i 2
+system sh/deploy.sh -n dnode3 -i 3
+system sh/deploy.sh -n dnode4 -i 4
+
+system sh/cfg.sh -n dnode1 -c numOfMnodes -v 1
+system sh/cfg.sh -n dnode2 -c numOfMnodes -v 1
+system sh/cfg.sh -n dnode3 -c numOfMnodes -v 1
+
+system sh/cfg.sh -n dnode1 -c walLevel -v 2
+system sh/cfg.sh -n dnode2 -c walLevel -v 2
+system sh/cfg.sh -n dnode3 -c walLevel -v 2
+system sh/cfg.sh -n dnode4 -c walLevel -v 2
+
+system sh/cfg.sh -n dnode1 -c balanceInterval -v 10
+system sh/cfg.sh -n dnode2 -c balanceInterval -v 10
+system sh/cfg.sh -n dnode3 -c balanceInterval -v 10
+system sh/cfg.sh -n dnode4 -c balanceInterval -v 10
+
+system sh/cfg.sh -n dnode1 -c numOfTotalVnodes -v 4
+system sh/cfg.sh -n dnode2 -c numOfTotalVnodes -v 4
+system sh/cfg.sh -n dnode3 -c numOfTotalVnodes -v 4
+system sh/cfg.sh -n dnode4 -c numOfTotalVnodes -v 4
+
+system sh/cfg.sh -n dnode1 -c alternativeRole -v 1
+system sh/cfg.sh -n dnode2 -c alternativeRole -v 2
+system sh/cfg.sh -n dnode3 -c alternativeRole -v 2
+system sh/cfg.sh -n dnode4 -c alternativeRole -v 2
+
+system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v 4
+system sh/cfg.sh -n dnode2 -c maxtablesPerVnode -v 4
+system sh/cfg.sh -n dnode3 -c maxtablesPerVnode -v 4
+system sh/cfg.sh -n dnode4 -c maxtablesPerVnode -v 4
+system sh/cfg.sh -n dnode5 -c maxtablesPerVnode -v 4
+
+system sh/cfg.sh -n dnode1 -c arbitrator -v $arbitrator
+system sh/cfg.sh -n dnode2 -c arbitrator -v $arbitrator
+system sh/cfg.sh -n dnode3 -c arbitrator -v $arbitrator
+
+print ============== step0: start tarbitrator
+system sh/exec_tarbitrator.sh -s start
+
+print ============== step1: start dnode1, only deploy mnode
+system sh/exec.sh -n dnode1 -s start
+sleep 3000
+sql connect
+
+print ============== step2: start dnode2/dnode3/dnode4 and add into cluster , then create database with replica 2, and create table, insert data
+system sh/exec.sh -n dnode2 -s start
+system sh/exec.sh -n dnode3 -s start
+system sh/exec.sh -n dnode4 -s start
+sql create dnode $hostname2
+sql create dnode $hostname3
+sql create dnode $hostname4
+sleep 3000
+
+$totalTableNum = 100
+$sleepTimer = 3000
+
+$db = db
+sql create database $db replica 3 maxTables $totalTableNum
+sql use $db
+
+# create table , insert data
+$stb = stb
+sql create table $stb (ts timestamp, c1 int) tags(t1 int)
+$rowNum = 100
+$tblNum = $totalTableNum
+$totalRows = 0
+$tsStart = 1420041600000
+
+$i = 0
+while $i < $tblNum
+  $tb = tb . $i
+  sql create table $tb using $stb tags( $i )
+ 
+  $x = 0
+  while $x < $rowNum
+    $ts = $tsStart + $x
+    sql insert into $tb values ( $ts + 0a , $x ) ( $ts + 1a , $x ) ( $ts + 2a , $x ) ( $ts + 3a , $x ) ( $ts + 4a , $x ) ( $ts + 5a , $x ) ( $ts + 6a , $x ) ( $ts + 7a , $x ) ( $ts + 8a , $x ) ( $ts + 9a , $x ) ( $ts + 10a , $x ) ( $ts + 11a , $x ) ( $ts + 12a , $x ) ( $ts + 13a , $x ) ( $ts + 14a , $x ) ( $ts + 15a , $x ) ( $ts + 16a , $x ) ( $ts + 17a , $x ) ( $ts + 18a , $x ) ( $ts + 19a , $x ) ( $ts + 20a , $x ) ( $ts + 21a , $x ) ( $ts + 22a , $x ) ( $ts + 23a , $x ) ( $ts + 24a , $x ) ( $ts + 25a , $x ) ( $ts + 26a , $x ) ( $ts + 27a , $x ) ( $ts + 28a , $x ) ( $ts + 29a , $x ) ( $ts + 30a , $x ) ( $ts + 31a , $x ) ( $ts + 32a , $x ) ( $ts + 33a , $x ) ( $ts + 34a , $x ) ( $ts + 25a , $x ) ( $ts + 26a , $x ) ( $ts + 27a , $x ) ( $ts + 28a , $x ) ( $ts + 29a , $x ) ( $ts + 30a , $x ) ( $ts + 31a , $x ) ( $ts + 32a , $x ) ( $ts + 33a , $x ) ( $ts + 34a , $x ) ( $ts + 35a , $x ) ( $ts + 36a , $x ) ( $ts + 37a , $x ) ( $ts + 38a , $x ) ( $ts + 39a , $x ) ( $ts + 40a , $x ) ( $ts + 41a , $x ) ( $ts + 42a , $x ) ( $ts + 43a , $x ) ( $ts + 44a , $x ) ( $ts + 45a , $x ) ( $ts + 46a , $x ) ( $ts + 47a , $x ) ( $ts + 48a , $x ) ( $ts + 49a , $x ) ( $ts + 50a , $x ) ( $ts + 51a , $x ) ( $ts + 52a , $x ) ( $ts + 53a , $x ) ( $ts + 54a , $x ) ( $ts + 55a , $x ) ( $ts + 56a , $x ) ( $ts + 57a , $x ) ( $ts + 58a , $x ) ( $ts + 59a , $x ) 
+    $x = $x + 60
+  endw 
+  $totalRows = $totalRows + $x
+  print       info: inserted $x rows into $tb and totalRows: $totalRows
+  $i = $i + 1
+endw 
+
+sql select count(*) from $stb
+sleep 1000
+print data00 $data00
+if $data00 != $totalRows then
+	return -1
+endi
+
+print ============== step3: stop dnode4, and remove its vnodeX subdirector 
+system sh/exec.sh -n dnode4 -s stop -x SIGINT
+sleep $sleepTimer
+wait_dnode4_offline_0:
+sql show dnodes
+if $rows != 4 then
+  sleep 2000
+  goto wait_dnode4_offline_0
+endi
+print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1
+print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2
+print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3
+#print $data0_4  $data1_4  $data2_4  $data3_4  $data4_4
+#print $data0_5  $data1_5  $data2_5  $data3_5  $data4_5
+#print $data0_6  $data1_6  $data2_6  $data3_6  $data4_6
+#$dnode1Status = $data4_1  
+$dnode2Status = $data4_2
+$dnode3Status = $data4_3  
+$dnode4Status = $data4_4 
+#$dnode5Status = $data4_5
+
+if $dnode4Status != offline then
+  sleep 2000
+  goto wait_dnode4_offline_0
+endi
+
+wait_dnode4_vgroup_offline:
+sql show vgroups
+if $rows != 1 then
+  sleep 2000
+  goto wait_dnode4_vgroup_offline
+endi
+print show vgroups:
+print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
+print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
+print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
+$dnode4Vtatus = $data4_2
+$dnode3Vtatus = $data7_2
+
+if $dnode4Vtatus != offline then
+  sleep 2000
+  goto wait_dnode4_vgroup_offline
+endi
+if $dnode3Vtatus != master then
+  sleep 2000
+  goto wait_dnode4_vgroup_offline
+endi
+
+
+system rm -rf ../../../sim/dnode4/data/vnode/*
+sleep 1000
+
+print ============== step4: restart dnode4, waiting sync end 
+system sh/exec.sh -n dnode4 -s start
+sleep $sleepTimer
+wait_dnode4_reready:
+sql show dnodes
+if $rows != 4 then
+  sleep 2000
+  goto wait_dnode4_reready
+endi
+print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1
+print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2
+print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3
+#print $data0_4  $data1_4  $data2_4  $data3_4  $data4_4
+#print $data0_5  $data1_5  $data2_5  $data3_5  $data4_5
+#print $data0_6  $data1_6  $data2_6  $data3_6  $data4_6
+#$dnode1Status = $data4_1  
+$dnode2Status = $data4_2
+$dnode3Status = $data4_3  
+$dnode4Status = $data4_4 
+#$dnode5Status = $data4_5
+
+if $dnode4Status != ready then
+  sleep 2000
+  goto wait_dnode4_reready
+endi
+
+wait_dnode4_vgroup_slave:
+sql show vgroups
+if $rows != 1 then
+  sleep 2000
+  goto wait_dnode4_vgroup_slave
+endi
+print show vgroups:
+print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
+print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
+print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
+$dnode4Vtatus = $data4_2
+$dnode3Vtatus = $data7_2
+
+print dnode4Vtatus: $dnode4Vtatus
+print dnode3Vtatus: $dnode3Vtatus 
+if $dnode4Vtatus != slave then
+  sleep 2000
+  goto wait_dnode4_vgroup_slave
+endi
+if $dnode3Vtatus != master then
+  sleep 2000
+  goto wait_dnode4_vgroup_slave
+endi
+
+print ============== step5: stop dnode3/dnode2, and check rows
+system sh/exec.sh -n dnode2 -s stop
+system sh/exec.sh -n dnode3 -s stop
+sleep $sleepTimer
+
+wait_dnode23_offline:
+sql show dnodes
+if $rows != 4 then
+  sleep 2000
+  goto wait_dnode23_offline
+endi
+print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1
+print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2
+print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3
+print $data0_4  $data1_4  $data2_4  $data3_4  $data4_4
+#print $data0_5  $data1_5  $data2_5  $data3_5  $data4_5
+#print $data0_6  $data1_6  $data2_6  $data3_6  $data4_6
+#$dnode1Status = $data4_1  
+$dnode2Status = $data4_2
+$dnode3Status = $data4_3  
+$dnode4Status = $data4_4 
+#$dnode5Status = $data4_5
+
+if $dnode2Status != offline then
+  sleep 2000
+  goto wait_dnode23_offline
+endi
+if $dnode3Status != offline then
+  sleep 2000
+  goto wait_dnode23_offline
+endi
+if $dnode4Status != ready then
+  sleep 2000
+  goto wait_dnode23_offline
+endi
+
+wait_dnode4_vgroup_master:
+sql show vgroups
+if $rows != 1 then
+  sleep 2000
+  goto wait_dnode4_vgroup_master
+endi
+print show vgroups:
+print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
+print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
+print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
+$dnode4Vtatus = $data4_2
+$dnode3Vtatus = $data7_2
+
+print dnode4Vtatus: $dnode4Vtatus
+print dnode3Vtatus: $dnode3Vtatus 
+if $dnode4Vtatus != master then
+  sleep 2000
+  goto wait_dnode4_vgroup_master
+endi
+if $dnode3Vtatus != offline then
+  sleep 2000
+  goto wait_dnode4_vgroup_master
+endi
+
+# check using select
+sql select count(*) from $stb
+print data00 $data00
+if $data00 != $totalRows then
+	return -1
+endi
+
+sql insert into $tb values ( now , 20000 ) ( now + 1a, 20001 ) ( now + 2a, 20002 )
+$totalRows = $totalRows + 3
+
+sql select count(*) from $stb
+print data00 $data00
+if $data00 != $totalRows then
+	return -1
+endi
+
diff --git a/tests/script/unique/arbitrator/offline_replica2_alterTable_online.sim b/tests/script/unique/arbitrator/offline_replica2_alterTable_online.sim
new file mode 100644
index 0000000000000000000000000000000000000000..990c77b0506019ace2bcc7a0ade1be09a0515638
--- /dev/null
+++ b/tests/script/unique/arbitrator/offline_replica2_alterTable_online.sim
@@ -0,0 +1,205 @@
+system sh/stop_dnodes.sh
+system sh/deploy.sh -n dnode1 -i 1
+system sh/deploy.sh -n dnode2 -i 2
+system sh/deploy.sh -n dnode3 -i 3
+system sh/deploy.sh -n dnode4 -i 4
+
+system sh/cfg.sh -n dnode1 -c numOfMnodes -v 1
+system sh/cfg.sh -n dnode2 -c numOfMnodes -v 1
+system sh/cfg.sh -n dnode3 -c numOfMnodes -v 1
+system sh/cfg.sh -n dnode4 -c numOfMnodes -v 1
+
+system sh/cfg.sh -n dnode1 -c walLevel -v 2
+system sh/cfg.sh -n dnode2 -c walLevel -v 2
+system sh/cfg.sh -n dnode3 -c walLevel -v 2
+system sh/cfg.sh -n dnode4 -c walLevel -v 2
+
+system sh/cfg.sh -n dnode1 -c balanceInterval -v 10
+system sh/cfg.sh -n dnode2 -c balanceInterval -v 10
+system sh/cfg.sh -n dnode3 -c balanceInterval -v 10
+system sh/cfg.sh -n dnode4 -c balanceInterval -v 10
+
+system sh/cfg.sh -n dnode1 -c numOfTotalVnodes -v 4
+system sh/cfg.sh -n dnode2 -c numOfTotalVnodes -v 4
+system sh/cfg.sh -n dnode3 -c numOfTotalVnodes -v 4
+system sh/cfg.sh -n dnode4 -c numOfTotalVnodes -v 4
+
+system sh/cfg.sh -n dnode1 -c alternativeRole -v 1
+system sh/cfg.sh -n dnode2 -c alternativeRole -v 2
+system sh/cfg.sh -n dnode3 -c alternativeRole -v 2
+system sh/cfg.sh -n dnode4 -c alternativeRole -v 2
+
+system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v 4
+system sh/cfg.sh -n dnode2 -c maxtablesPerVnode -v 4
+system sh/cfg.sh -n dnode3 -c maxtablesPerVnode -v 4
+system sh/cfg.sh -n dnode4 -c maxtablesPerVnode -v 4
+
+system sh/cfg.sh -n dnode1 -c arbitrator -v $arbitrator
+system sh/cfg.sh -n dnode2 -c arbitrator -v $arbitrator
+system sh/cfg.sh -n dnode3 -c arbitrator -v $arbitrator
+system sh/cfg.sh -n dnode4 -c arbitrator -v $arbitrator
+
+print ============== step0: start tarbitrator
+system sh/exec_tarbitrator.sh -s start
+
+print ============== step1: start dnode1, only deploy mnode
+system sh/exec.sh -n dnode1 -s start
+sleep 3000
+sql connect
+
+print ============== step2: start dnode2/dnode3/dnode4 and add into cluster , then create database with replica 3, and create table, insert data
+system sh/exec.sh -n dnode2 -s start
+#system sh/exec.sh -n dnode3 -s start
+system sh/exec.sh -n dnode4 -s start
+sql create dnode $hostname2
+#sql create dnode $hostname3
+sql create dnode $hostname4
+sleep 3000
+
+$totalTableNum = 100
+$sleepTimer = 3000
+
+$db = db
+print create database $db replica 3 maxTables $totalTableNum
+sql create database $db replica 3 maxTables $totalTableNum
+sql use $db
+
+# create table , insert data
+$stb = stb
+sql create table $stb (ts timestamp, c1 int) tags(t1 int)
+$rowNum = 500
+$tblNum = $totalTableNum
+$totalRows = 0
+$tsStart = 1420041600000
+$tsEnd = 0
+
+$i = 0
+while $i < $tblNum
+  $tb = tb . $i
+  sql create table $tb using $stb tags( $i )
+ 
+  $x = 0
+  while $x < $rowNum
+    $ts = $tsStart + $x
+    sql insert into $tb values ( $ts + 0a , $x ) ( $ts + 1a , $x ) ( $ts + 2a , $x ) ( $ts + 3a , $x ) ( $ts + 4a , $x ) ( $ts + 5a , $x ) ( $ts + 6a , $x ) ( $ts + 7a , $x ) ( $ts + 8a , $x ) ( $ts + 9a , $x ) ( $ts + 10a , $x ) ( $ts + 11a , $x ) ( $ts + 12a , $x ) ( $ts + 13a , $x ) ( $ts + 14a , $x ) ( $ts + 15a , $x ) ( $ts + 16a , $x ) ( $ts + 17a , $x ) ( $ts + 18a , $x ) ( $ts + 19a , $x ) ( $ts + 20a , $x ) ( $ts + 21a , $x ) ( $ts + 22a , $x ) ( $ts + 23a , $x ) ( $ts + 24a , $x ) ( $ts + 25a , $x ) ( $ts + 26a , $x ) ( $ts + 27a , $x ) ( $ts + 28a , $x ) ( $ts + 29a , $x ) ( $ts + 30a , $x ) ( $ts + 31a , $x ) ( $ts + 32a , $x ) ( $ts + 33a , $x ) ( $ts + 34a , $x ) ( $ts + 25a , $x ) ( $ts + 26a , $x ) ( $ts + 27a , $x ) ( $ts + 28a , $x ) ( $ts + 29a , $x ) ( $ts + 30a , $x ) ( $ts + 31a , $x ) ( $ts + 32a , $x ) ( $ts + 33a , $x ) ( $ts + 34a , $x ) ( $ts + 35a , $x ) ( $ts + 36a , $x ) ( $ts + 37a , $x ) ( $ts + 38a , $x ) ( $ts + 39a , $x ) ( $ts + 40a , $x ) ( $ts + 41a , $x ) ( $ts + 42a , $x ) ( $ts + 43a , $x ) ( $ts + 44a , $x ) ( $ts + 45a , $x ) ( $ts + 46a , $x ) ( $ts + 47a , $x ) ( $ts + 48a , $x ) ( $ts + 49a , $x ) ( $ts + 50a , $x ) ( $ts + 51a , $x ) ( $ts + 52a , $x ) ( $ts + 53a , $x ) ( $ts + 54a , $x ) ( $ts + 55a , $x ) ( $ts + 56a , $x ) ( $ts + 57a , $x ) ( $ts + 58a , $x ) ( $ts + 59a , $x ) 
+    $x = $x + 60
+  endw 
+  $totalRows = $totalRows + $x
+  print       info: inserted $x rows into $tb and totalRows: $totalRows
+  $i = $i + 1
+endw 
+$tsEnd = $tsStart + $totalRows / $tblNum
+
+sql select count(*) from $stb
+print data00 $data00
+if $data00 != $totalRows then
+	return -1
+endi
+
+print ============== step3: stop dnode4 
+system sh/exec.sh -n dnode4 -s stop -x SIGINT
+sleep $sleepTimer
+wait_dnode4_offline_0:
+sql show dnodes
+if $rows != 3 then
+  sleep 2000
+  goto wait_dnode4_offline_0
+endi
+print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1
+print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2
+print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3
+#print $data0_4  $data1_4  $data2_4  $data3_4  $data4_4
+#print $data0_5  $data1_5  $data2_5  $data3_5  $data4_5
+#print $data0_6  $data1_6  $data2_6  $data3_6  $data4_6
+#$dnode1Status = $data4_1  
+$dnode2Status = $data4_2
+$dnode3Status = $data4_3  
+$dnode4Status = $data4_4 
+#$dnode5Status = $data4_5
+
+if $dnode4Status != offline then
+  sleep 2000
+  goto wait_dnode4_offline_0
+endi
+
+wait_dnode4_vgroup_offline:
+sql show vgroups
+if $rows != 1 then
+  sleep 2000
+  goto wait_dnode4_vgroup_offline
+endi
+print show vgroups:
+print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
+print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
+print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
+$dnode4Vtatus = $data4_2
+$dnode3Vtatus = $data7_2
+
+if $dnode4Vtatus != offline then
+  sleep 2000
+  goto wait_dnode4_vgroup_offline
+endi
+if $dnode3Vtatus != master then
+  sleep 2000
+  goto wait_dnode4_vgroup_offline
+endi
+
+print ============== step4: alter table and insert more data rows
+sql alter table $stb drop column c1
+sql alter table $stb add column f1 double
+
+$i = 0
+while $i < $tblNum
+  $tb = tb . $i
+  sql inset into $tb values (now, 10001) (now + 1s, 10002) (now + 2s, 10003) (now + 3s, 10004)
+  $i = $i + 1
+endw 
+$addRows = 4 * $tblNum
+$totalRows = $totalRows + $addRows
+
+print ============== step5: restart dnode4, waiting dnode4 synced
+system sh/exec.sh -n dnode4 -s start
+
+wait_dnode4_ready:
+sql show dnodes
+if $rows != 3 then
+  sleep 2000
+  goto wait_dnode4_ready
+endi
+print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1
+print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2
+print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3
+print $data0_4  $data1_4  $data2_4  $data3_4  $data4_4
+#print $data0_5  $data1_5  $data2_5  $data3_5  $data4_5
+#print $data0_6  $data1_6  $data2_6  $data3_6  $data4_6
+#$dnode1Status = $data4_1  
+#$dnode2Status = $data4_2
+$dnode3Status = $data4_3  
+$dnode4Status = $data4_4 
+#$dnode5Status = $data4_5
+
+if $dnode4Status != ready then
+  sleep 2000
+  goto wait_dnode4_ready
+endi
+
+print ============== step6: check result
+
+sql reset query cache
+
+$cnt = 0
+wait_table_dropped:
+$cnt = $cnt + 1
+if $cnt == 20 then
+  return -1
+endi
+sql select count(*) from $stb
+if $data00 != $totalRows then
+  print data00: $data00 totalRows: $totalRows
+	sleep 2000
+	goto wait_table_dropped
+endi
+
+
+
+
diff --git a/tests/script/unique/arbitrator/offline_replica2_createTable_online.sim b/tests/script/unique/arbitrator/offline_replica2_createTable_online.sim
new file mode 100644
index 0000000000000000000000000000000000000000..eb76908ac9f3b6ac8635e194b05948a16652e7a9
--- /dev/null
+++ b/tests/script/unique/arbitrator/offline_replica2_createTable_online.sim
@@ -0,0 +1,217 @@
+system sh/stop_dnodes.sh
+system sh/deploy.sh -n dnode1 -i 1
+system sh/deploy.sh -n dnode2 -i 2
+system sh/deploy.sh -n dnode3 -i 3
+system sh/deploy.sh -n dnode4 -i 4
+
+system sh/cfg.sh -n dnode1 -c numOfMnodes -v 1
+system sh/cfg.sh -n dnode2 -c numOfMnodes -v 1
+system sh/cfg.sh -n dnode3 -c numOfMnodes -v 1
+system sh/cfg.sh -n dnode4 -c numOfMnodes -v 1
+
+system sh/cfg.sh -n dnode1 -c walLevel -v 2
+system sh/cfg.sh -n dnode2 -c walLevel -v 2
+system sh/cfg.sh -n dnode3 -c walLevel -v 2
+system sh/cfg.sh -n dnode4 -c walLevel -v 2
+
+system sh/cfg.sh -n dnode1 -c balanceInterval -v 10
+system sh/cfg.sh -n dnode2 -c balanceInterval -v 10
+system sh/cfg.sh -n dnode3 -c balanceInterval -v 10
+system sh/cfg.sh -n dnode4 -c balanceInterval -v 10
+
+system sh/cfg.sh -n dnode1 -c numOfTotalVnodes -v 4
+system sh/cfg.sh -n dnode2 -c numOfTotalVnodes -v 4
+system sh/cfg.sh -n dnode3 -c numOfTotalVnodes -v 4
+system sh/cfg.sh -n dnode4 -c numOfTotalVnodes -v 4
+
+system sh/cfg.sh -n dnode1 -c alternativeRole -v 1
+system sh/cfg.sh -n dnode2 -c alternativeRole -v 2
+system sh/cfg.sh -n dnode3 -c alternativeRole -v 2
+system sh/cfg.sh -n dnode4 -c alternativeRole -v 2
+
+system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v 4
+system sh/cfg.sh -n dnode2 -c maxtablesPerVnode -v 4
+system sh/cfg.sh -n dnode3 -c maxtablesPerVnode -v 4
+system sh/cfg.sh -n dnode4 -c maxtablesPerVnode -v 4
+
+system sh/cfg.sh -n dnode1 -c arbitrator -v $arbitrator
+system sh/cfg.sh -n dnode2 -c arbitrator -v $arbitrator
+system sh/cfg.sh -n dnode3 -c arbitrator -v $arbitrator
+system sh/cfg.sh -n dnode4 -c arbitrator -v $arbitrator
+
+print ============== step0: start tarbitrator
+system sh/exec_tarbitrator.sh -s start
+
+print ============== step1: start dnode1, only deploy mnode
+system sh/exec.sh -n dnode1 -s start
+sleep 3000
+sql connect
+
+print ============== step2: start dnode2/dnode3/dnode4 and add into cluster , then create database with replica 3, and create table, insert data
+system sh/exec.sh -n dnode2 -s start
+#system sh/exec.sh -n dnode3 -s start
+system sh/exec.sh -n dnode4 -s start
+sql create dnode $hostname2
+#sql create dnode $hostname3
+sql create dnode $hostname4
+sleep 3000
+
+$totalTableNum = 100
+$sleepTimer = 3000
+
+$db = db
+print create database $db replica 3 maxTables $totalTableNum
+sql create database $db replica 3 maxTables $totalTableNum
+sql use $db
+
+# create table , insert data
+$stb = stb
+sql create table $stb (ts timestamp, c1 int) tags(t1 int)
+$rowNum = 500
+$tblNum = $totalTableNum
+$totalRows = 0
+$tsStart = 1420041600000
+$tsEnd = 0
+
+$i = 0
+while $i < $tblNum
+  $tb = tb . $i
+  sql create table $tb using $stb tags( $i )
+ 
+  $x = 0
+  while $x < $rowNum
+    $ts = $tsStart + $x
+    sql insert into $tb values ( $ts + 0a , $x ) ( $ts + 1a , $x ) ( $ts + 2a , $x ) ( $ts + 3a , $x ) ( $ts + 4a , $x ) ( $ts + 5a , $x ) ( $ts + 6a , $x ) ( $ts + 7a , $x ) ( $ts + 8a , $x ) ( $ts + 9a , $x ) ( $ts + 10a , $x ) ( $ts + 11a , $x ) ( $ts + 12a , $x ) ( $ts + 13a , $x ) ( $ts + 14a , $x ) ( $ts + 15a , $x ) ( $ts + 16a , $x ) ( $ts + 17a , $x ) ( $ts + 18a , $x ) ( $ts + 19a , $x ) ( $ts + 20a , $x ) ( $ts + 21a , $x ) ( $ts + 22a , $x ) ( $ts + 23a , $x ) ( $ts + 24a , $x ) ( $ts + 25a , $x ) ( $ts + 26a , $x ) ( $ts + 27a , $x ) ( $ts + 28a , $x ) ( $ts + 29a , $x ) ( $ts + 30a , $x ) ( $ts + 31a , $x ) ( $ts + 32a , $x ) ( $ts + 33a , $x ) ( $ts + 34a , $x ) ( $ts + 25a , $x ) ( $ts + 26a , $x ) ( $ts + 27a , $x ) ( $ts + 28a , $x ) ( $ts + 29a , $x ) ( $ts + 30a , $x ) ( $ts + 31a , $x ) ( $ts + 32a , $x ) ( $ts + 33a , $x ) ( $ts + 34a , $x ) ( $ts + 35a , $x ) ( $ts + 36a , $x ) ( $ts + 37a , $x ) ( $ts + 38a , $x ) ( $ts + 39a , $x ) ( $ts + 40a , $x ) ( $ts + 41a , $x ) ( $ts + 42a , $x ) ( $ts + 43a , $x ) ( $ts + 44a , $x ) ( $ts + 45a , $x ) ( $ts + 46a , $x ) ( $ts + 47a , $x ) ( $ts + 48a , $x ) ( $ts + 49a , $x ) ( $ts + 50a , $x ) ( $ts + 51a , $x ) ( $ts + 52a , $x ) ( $ts + 53a , $x ) ( $ts + 54a , $x ) ( $ts + 55a , $x ) ( $ts + 56a , $x ) ( $ts + 57a , $x ) ( $ts + 58a , $x ) ( $ts + 59a , $x ) 
+    $x = $x + 60
+  endw 
+  $totalRows = $totalRows + $x
+  print       info: inserted $x rows into $tb and totalRows: $totalRows
+  $i = $i + 1
+endw 
+$tsEnd = $tsStart + $totalRows / $tblNum
+
+sql select count(*) from $stb
+print data00 $data00
+if $data00 != $totalRows then
+	return -1
+endi
+
+print ============== step3: stop dnode4 
+system sh/exec.sh -n dnode4 -s stop -x SIGINT
+sleep $sleepTimer
+wait_dnode4_offline_0:
+sql show dnodes
+if $rows != 3 then
+  sleep 2000
+  goto wait_dnode4_offline_0
+endi
+print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1
+print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2
+print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3
+#print $data0_4  $data1_4  $data2_4  $data3_4  $data4_4
+#print $data0_5  $data1_5  $data2_5  $data3_5  $data4_5
+#print $data0_6  $data1_6  $data2_6  $data3_6  $data4_6
+#$dnode1Status = $data4_1  
+$dnode2Status = $data4_2
+$dnode3Status = $data4_3  
+$dnode4Status = $data4_4 
+#$dnode5Status = $data4_5
+
+if $dnode4Status != offline then
+  sleep 2000
+  goto wait_dnode4_offline_0
+endi
+
+wait_dnode4_vgroup_offline:
+sql show vgroups
+if $rows != 1 then
+  sleep 2000
+  goto wait_dnode4_vgroup_offline
+endi
+print show vgroups:
+print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
+print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
+print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
+$dnode4Vtatus = $data4_2
+$dnode3Vtatus = $data7_2
+
+if $dnode4Vtatus != offline then
+  sleep 2000
+  goto wait_dnode4_vgroup_offline
+endi
+if $dnode3Vtatus != master then
+  sleep 2000
+  goto wait_dnode4_vgroup_offline
+endi
+
+print ============== step4: create more tables and insert data rows
+$tsStart = $tsEnd + 1000
+$i = $tblNum
+$tblNum = $tblNum * 2
+while $i < $tblNum
+  $tb = tb . $i
+  sql create table $tb using $stb tags( $i )
+  
+  $x = 0
+  while $x < $rowNum
+    $ts = $tsStart + $x
+    sql insert into $tb values ( $ts + 0a , $x ) ( $ts + 1a , $x ) ( $ts + 2a , $x ) ( $ts + 3a , $x ) ( $ts + 4a , $x ) ( $ts + 5a , $x ) ( $ts + 6a , $x ) ( $ts + 7a , $x ) ( $ts + 8a , $x ) ( $ts + 9a , $x ) ( $ts + 10a , $x ) ( $ts + 11a , $x ) ( $ts + 12a , $x ) ( $ts + 13a , $x ) ( $ts + 14a , $x ) ( $ts + 15a , $x ) ( $ts + 16a , $x ) ( $ts + 17a , $x ) ( $ts + 18a , $x ) ( $ts + 19a , $x ) ( $ts + 20a , $x ) ( $ts + 21a , $x ) ( $ts + 22a , $x ) ( $ts + 23a , $x ) ( $ts + 24a , $x ) ( $ts + 25a , $x ) ( $ts + 26a , $x ) ( $ts + 27a , $x ) ( $ts + 28a , $x ) ( $ts + 29a , $x ) ( $ts + 30a , $x ) ( $ts + 31a , $x ) ( $ts + 32a , $x ) ( $ts + 33a , $x ) ( $ts + 34a , $x ) ( $ts + 25a , $x ) ( $ts + 26a , $x ) ( $ts + 27a , $x ) ( $ts + 28a , $x ) ( $ts + 29a , $x ) ( $ts + 30a , $x ) ( $ts + 31a , $x ) ( $ts + 32a , $x ) ( $ts + 33a , $x ) ( $ts + 34a , $x ) ( $ts + 35a , $x ) ( $ts + 36a , $x ) ( $ts + 37a , $x ) ( $ts + 38a , $x ) ( $ts + 39a , $x ) ( $ts + 40a , $x ) ( $ts + 41a , $x ) ( $ts + 42a , $x ) ( $ts + 43a , $x ) ( $ts + 44a , $x ) ( $ts + 45a , $x ) ( $ts + 46a , $x ) ( $ts + 47a , $x ) ( $ts + 48a , $x ) ( $ts + 49a , $x ) ( $ts + 50a , $x ) ( $ts + 51a , $x ) ( $ts + 52a , $x ) ( $ts + 53a , $x ) ( $ts + 54a , $x ) ( $ts + 55a , $x ) ( $ts + 56a , $x ) ( $ts + 57a , $x ) ( $ts + 58a , $x ) ( $ts + 59a , $x ) 
+    $x = $x + 60
+  endw 
+  $totalRows = $totalRows + $x
+  print       info: inserted $x rows into $tb and totalRows: $totalRows
+  $i = $i + 1
+endw 
+
+sql select count(*) from $stb
+print data00 $data00
+if $data00 != $totalRows then
+	return -1
+endi
+
+print ============== step5: restart dnode4, waiting dnode4 synced
+system sh/exec.sh -n dnode4 -s start
+
+wait_dnode4_ready:
+sql show dnodes
+if $rows != 3 then
+  sleep 2000
+  goto wait_dnode4_ready
+endi
+print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1
+print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2
+print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3
+print $data0_4  $data1_4  $data2_4  $data3_4  $data4_4
+#print $data0_5  $data1_5  $data2_5  $data3_5  $data4_5
+#print $data0_6  $data1_6  $data2_6  $data3_6  $data4_6
+#$dnode1Status = $data4_1  
+#$dnode2Status = $data4_2
+$dnode3Status = $data4_3  
+$dnode4Status = $data4_4 
+#$dnode5Status = $data4_5
+
+if $dnode4Status != ready then
+  sleep 2000
+  goto wait_dnode4_ready
+endi
+
+print ============== step6: check result
+
+sql reset query cache
+
+$cnt = 0
+wait_table_altered:
+$cnt = $cnt + 1
+if $cnt == 20 then
+  return -1
+endi
+sql select count(*) from $stb
+if $data00 != $totalRows then
+  print data00: $data00
+	sleep 2000
+	goto wait_table_altered
+endi
+
+
+
+
diff --git a/tests/script/unique/arbitrator/offline_replica2_dropDb_online.sim b/tests/script/unique/arbitrator/offline_replica2_dropDb_online.sim
new file mode 100644
index 0000000000000000000000000000000000000000..f4af4f4c9dbc7c9c019dabcb28539c0ab576b9ed
--- /dev/null
+++ b/tests/script/unique/arbitrator/offline_replica2_dropDb_online.sim
@@ -0,0 +1,169 @@
+system sh/stop_dnodes.sh
+system sh/deploy.sh -n dnode1 -i 1
+system sh/deploy.sh -n dnode2 -i 2
+system sh/deploy.sh -n dnode3 -i 3
+system sh/deploy.sh -n dnode4 -i 4
+
+system sh/cfg.sh -n dnode1 -c numOfMnodes -v 1
+system sh/cfg.sh -n dnode2 -c numOfMnodes -v 1
+system sh/cfg.sh -n dnode3 -c numOfMnodes -v 1
+system sh/cfg.sh -n dnode4 -c numOfMnodes -v 1
+
+system sh/cfg.sh -n dnode1 -c walLevel -v 2
+system sh/cfg.sh -n dnode2 -c walLevel -v 2
+system sh/cfg.sh -n dnode3 -c walLevel -v 2
+system sh/cfg.sh -n dnode4 -c walLevel -v 2
+
+system sh/cfg.sh -n dnode1 -c balanceInterval -v 10
+system sh/cfg.sh -n dnode2 -c balanceInterval -v 10
+system sh/cfg.sh -n dnode3 -c balanceInterval -v 10
+system sh/cfg.sh -n dnode4 -c balanceInterval -v 10
+
+system sh/cfg.sh -n dnode1 -c numOfTotalVnodes -v 4
+system sh/cfg.sh -n dnode2 -c numOfTotalVnodes -v 4
+system sh/cfg.sh -n dnode3 -c numOfTotalVnodes -v 4
+system sh/cfg.sh -n dnode4 -c numOfTotalVnodes -v 4
+
+system sh/cfg.sh -n dnode1 -c alternativeRole -v 1
+system sh/cfg.sh -n dnode2 -c alternativeRole -v 2
+system sh/cfg.sh -n dnode3 -c alternativeRole -v 2
+system sh/cfg.sh -n dnode4 -c alternativeRole -v 2
+
+system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v 4
+system sh/cfg.sh -n dnode2 -c maxtablesPerVnode -v 4
+system sh/cfg.sh -n dnode3 -c maxtablesPerVnode -v 4
+system sh/cfg.sh -n dnode4 -c maxtablesPerVnode -v 4
+
+system sh/cfg.sh -n dnode1 -c arbitrator -v $arbitrator
+system sh/cfg.sh -n dnode2 -c arbitrator -v $arbitrator
+system sh/cfg.sh -n dnode3 -c arbitrator -v $arbitrator
+system sh/cfg.sh -n dnode4 -c arbitrator -v $arbitrator
+
+print ============== step0: start tarbitrator
+system sh/exec_tarbitrator.sh -s start
+
+print ============== step1: start dnode1, only deploy mnode
+system sh/exec.sh -n dnode1 -s start
+sleep 3000
+sql connect
+
+print ============== step2: start dnode2/dnode3/dnode4 and add into cluster , then create database with replica 2, and create table, insert data
+system sh/exec.sh -n dnode2 -s start
+#system sh/exec.sh -n dnode3 -s start
+system sh/exec.sh -n dnode4 -s start
+sql create dnode $hostname2
+#sql create dnode $hostname3
+sql create dnode $hostname4
+sleep 3000
+
+$totalTableNum = 100
+$sleepTimer = 3000
+
+$db = db
+print create database $db replica 2 maxTables $totalTableNum
+sql create database $db replica 2 maxTables $totalTableNum
+sql use $db
+
+# create table , insert data
+$stb = stb
+sql create table $stb (ts timestamp, c1 int) tags(t1 int)
+$rowNum = 500
+$tblNum = $totalTableNum
+$totalRows = 0
+$tsStart = 1420041600000
+$tsEnd = 0
+
+$i = 0
+while $i < $tblNum
+  $tb = tb . $i
+  sql create table $tb using $stb tags( $i )
+ 
+  $x = 0
+  while $x < $rowNum
+    $ts = $tsStart + $x
+    sql insert into $tb values ( $ts + 0a , $x ) ( $ts + 1a , $x ) ( $ts + 2a , $x ) ( $ts + 3a , $x ) ( $ts + 4a , $x ) ( $ts + 5a , $x ) ( $ts + 6a , $x ) ( $ts + 7a , $x ) ( $ts + 8a , $x ) ( $ts + 9a , $x ) ( $ts + 10a , $x ) ( $ts + 11a , $x ) ( $ts + 12a , $x ) ( $ts + 13a , $x ) ( $ts + 14a , $x ) ( $ts + 15a , $x ) ( $ts + 16a , $x ) ( $ts + 17a , $x ) ( $ts + 18a , $x ) ( $ts + 19a , $x ) ( $ts + 20a , $x ) ( $ts + 21a , $x ) ( $ts + 22a , $x ) ( $ts + 23a , $x ) ( $ts + 24a , $x ) ( $ts + 25a , $x ) ( $ts + 26a , $x ) ( $ts + 27a , $x ) ( $ts + 28a , $x ) ( $ts + 29a , $x ) ( $ts + 30a , $x ) ( $ts + 31a , $x ) ( $ts + 32a , $x ) ( $ts + 33a , $x ) ( $ts + 34a , $x ) ( $ts + 25a , $x ) ( $ts + 26a , $x ) ( $ts + 27a , $x ) ( $ts + 28a , $x ) ( $ts + 29a , $x ) ( $ts + 30a , $x ) ( $ts + 31a , $x ) ( $ts + 32a , $x ) ( $ts + 33a , $x ) ( $ts + 34a , $x ) ( $ts + 35a , $x ) ( $ts + 36a , $x ) ( $ts + 37a , $x ) ( $ts + 38a , $x ) ( $ts + 39a , $x ) ( $ts + 40a , $x ) ( $ts + 41a , $x ) ( $ts + 42a , $x ) ( $ts + 43a , $x ) ( $ts + 44a , $x ) ( $ts + 45a , $x ) ( $ts + 46a , $x ) ( $ts + 47a , $x ) ( $ts + 48a , $x ) ( $ts + 49a , $x ) ( $ts + 50a , $x ) ( $ts + 51a , $x ) ( $ts + 52a , $x ) ( $ts + 53a , $x ) ( $ts + 54a , $x ) ( $ts + 55a , $x ) ( $ts + 56a , $x ) ( $ts + 57a , $x ) ( $ts + 58a , $x ) ( $ts + 59a , $x ) 
+    $x = $x + 60
+  endw 
+  $totalRows = $totalRows + $x
+  print       info: inserted $x rows into $tb and totalRows: $totalRows
+  $i = $i + 1
+endw 
+$tsEnd = $tsStart + $totalRows / $tblNum
+
+sql select count(*) from $stb
+print data00 $data00
+if $data00 != $totalRows then
+	return -1
+endi
+
+print ============== step3: stop dnode4 
+system sh/exec.sh -n dnode4 -s stop -x SIGINT
+sleep $sleepTimer
+wait_dnode4_offline_0:
+sql show dnodes
+if $rows != 3 then
+  sleep 2000
+  goto wait_dnode4_offline_0
+endi
+print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1
+print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2
+print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3
+#print $data0_4  $data1_4  $data2_4  $data3_4  $data4_4
+#print $data0_5  $data1_5  $data2_5  $data3_5  $data4_5
+#print $data0_6  $data1_6  $data2_6  $data3_6  $data4_6
+#$dnode1Status = $data4_1  
+$dnode2Status = $data4_2
+$dnode3Status = $data4_3  
+$dnode4Status = $data4_4 
+#$dnode5Status = $data4_5
+
+if $dnode4Status != offline then
+  sleep 2000
+  goto wait_dnode4_offline_0
+endi
+
+wait_dnode4_vgroup_offline:
+sql show vgroups
+if $rows != 1 then
+  sleep 2000
+  goto wait_dnode4_vgroup_offline
+endi
+print show vgroups:
+print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
+print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
+print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
+$dnode4Vtatus = $data4_2
+$dnode3Vtatus = $data7_2
+
+if $dnode4Vtatus != offline then
+  sleep 2000
+  goto wait_dnode4_vgroup_offline
+endi
+if $dnode3Vtatus != master then
+  sleep 2000
+  goto wait_dnode4_vgroup_offline
+endi
+
+print ============== step4: drop db
+sql drop database $db
+
+print ============== step5: restart dnode4 
+system sh/exec.sh -n dnode4 -s start
+
+print ============== step6: check result
+sql reset query cache
+$cnt = 0
+wait_database_dropped:
+$cnt = $cnt + 1
+if $cnt == 20 then
+  return -1
+endi
+sql show databases
+if $rows != 0 then
+	sleep 2000
+	goto wait_database_dropped
+endi
+
+
+
+
diff --git a/tests/script/unique/arbitrator/offline_replica2_dropTable_online.sim b/tests/script/unique/arbitrator/offline_replica2_dropTable_online.sim
new file mode 100644
index 0000000000000000000000000000000000000000..56e468bf1a38dbf768b68f0d7bf36d311016f9a6
--- /dev/null
+++ b/tests/script/unique/arbitrator/offline_replica2_dropTable_online.sim
@@ -0,0 +1,203 @@
+system sh/stop_dnodes.sh
+system sh/deploy.sh -n dnode1 -i 1
+system sh/deploy.sh -n dnode2 -i 2
+system sh/deploy.sh -n dnode3 -i 3
+system sh/deploy.sh -n dnode4 -i 4
+
+system sh/cfg.sh -n dnode1 -c numOfMnodes -v 1
+system sh/cfg.sh -n dnode2 -c numOfMnodes -v 1
+system sh/cfg.sh -n dnode3 -c numOfMnodes -v 1
+system sh/cfg.sh -n dnode4 -c numOfMnodes -v 1
+
+system sh/cfg.sh -n dnode1 -c walLevel -v 2
+system sh/cfg.sh -n dnode2 -c walLevel -v 2
+system sh/cfg.sh -n dnode3 -c walLevel -v 2
+system sh/cfg.sh -n dnode4 -c walLevel -v 2
+
+system sh/cfg.sh -n dnode1 -c balanceInterval -v 10
+system sh/cfg.sh -n dnode2 -c balanceInterval -v 10
+system sh/cfg.sh -n dnode3 -c balanceInterval -v 10
+system sh/cfg.sh -n dnode4 -c balanceInterval -v 10
+
+system sh/cfg.sh -n dnode1 -c numOfTotalVnodes -v 4
+system sh/cfg.sh -n dnode2 -c numOfTotalVnodes -v 4
+system sh/cfg.sh -n dnode3 -c numOfTotalVnodes -v 4
+system sh/cfg.sh -n dnode4 -c numOfTotalVnodes -v 4
+
+system sh/cfg.sh -n dnode1 -c alternativeRole -v 1
+system sh/cfg.sh -n dnode2 -c alternativeRole -v 2
+system sh/cfg.sh -n dnode3 -c alternativeRole -v 2
+system sh/cfg.sh -n dnode4 -c alternativeRole -v 2
+
+system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v 4
+system sh/cfg.sh -n dnode2 -c maxtablesPerVnode -v 4
+system sh/cfg.sh -n dnode3 -c maxtablesPerVnode -v 4
+system sh/cfg.sh -n dnode4 -c maxtablesPerVnode -v 4
+
+system sh/cfg.sh -n dnode1 -c arbitrator -v $arbitrator
+system sh/cfg.sh -n dnode2 -c arbitrator -v $arbitrator
+system sh/cfg.sh -n dnode3 -c arbitrator -v $arbitrator
+system sh/cfg.sh -n dnode4 -c arbitrator -v $arbitrator
+
+print ============== step0: start tarbitrator
+system sh/exec_tarbitrator.sh -s start
+
+print ============== step1: start dnode1, only deploy mnode
+system sh/exec.sh -n dnode1 -s start
+sleep 3000
+sql connect
+
+print ============== step2: start dnode2/dnode3/dnode4 and add into cluster , then create database with replica 3, and create table, insert data
+system sh/exec.sh -n dnode2 -s start
+#system sh/exec.sh -n dnode3 -s start
+system sh/exec.sh -n dnode4 -s start
+sql create dnode $hostname2
+#sql create dnode $hostname3
+sql create dnode $hostname4
+sleep 3000
+
+$totalTableNum = 100
+$sleepTimer = 3000
+
+$db = db
+print create database $db replica 3 maxTables $totalTableNum
+sql create database $db replica 3 maxTables $totalTableNum
+sql use $db
+
+# create table , insert data
+$stb = stb
+sql create table $stb (ts timestamp, c1 int) tags(t1 int)
+$rowNum = 500
+$tblNum = $totalTableNum
+$totalRows = 0
+$tsStart = 1420041600000
+$tsEnd = 0
+
+$i = 0
+while $i < $tblNum
+  $tb = tb . $i
+  sql create table $tb using $stb tags( $i )
+ 
+  $x = 0
+  while $x < $rowNum
+    $ts = $tsStart + $x
+    sql insert into $tb values ( $ts + 0a , $x ) ( $ts + 1a , $x ) ( $ts + 2a , $x ) ( $ts + 3a , $x ) ( $ts + 4a , $x ) ( $ts + 5a , $x ) ( $ts + 6a , $x ) ( $ts + 7a , $x ) ( $ts + 8a , $x ) ( $ts + 9a , $x ) ( $ts + 10a , $x ) ( $ts + 11a , $x ) ( $ts + 12a , $x ) ( $ts + 13a , $x ) ( $ts + 14a , $x ) ( $ts + 15a , $x ) ( $ts + 16a , $x ) ( $ts + 17a , $x ) ( $ts + 18a , $x ) ( $ts + 19a , $x ) ( $ts + 20a , $x ) ( $ts + 21a , $x ) ( $ts + 22a , $x ) ( $ts + 23a , $x ) ( $ts + 24a , $x ) ( $ts + 25a , $x ) ( $ts + 26a , $x ) ( $ts + 27a , $x ) ( $ts + 28a , $x ) ( $ts + 29a , $x ) ( $ts + 30a , $x ) ( $ts + 31a , $x ) ( $ts + 32a , $x ) ( $ts + 33a , $x ) ( $ts + 34a , $x ) ( $ts + 25a , $x ) ( $ts + 26a , $x ) ( $ts + 27a , $x ) ( $ts + 28a , $x ) ( $ts + 29a , $x ) ( $ts + 30a , $x ) ( $ts + 31a , $x ) ( $ts + 32a , $x ) ( $ts + 33a , $x ) ( $ts + 34a , $x ) ( $ts + 35a , $x ) ( $ts + 36a , $x ) ( $ts + 37a , $x ) ( $ts + 38a , $x ) ( $ts + 39a , $x ) ( $ts + 40a , $x ) ( $ts + 41a , $x ) ( $ts + 42a , $x ) ( $ts + 43a , $x ) ( $ts + 44a , $x ) ( $ts + 45a , $x ) ( $ts + 46a , $x ) ( $ts + 47a , $x ) ( $ts + 48a , $x ) ( $ts + 49a , $x ) ( $ts + 50a , $x ) ( $ts + 51a , $x ) ( $ts + 52a , $x ) ( $ts + 53a , $x ) ( $ts + 54a , $x ) ( $ts + 55a , $x ) ( $ts + 56a , $x ) ( $ts + 57a , $x ) ( $ts + 58a , $x ) ( $ts + 59a , $x ) 
+    $x = $x + 60
+  endw 
+  $totalRows = $totalRows + $x
+  print       info: inserted $x rows into $tb and totalRows: $totalRows
+  $i = $i + 1
+endw 
+$tsEnd = $tsStart + $totalRows / $tblNum
+
+sql select count(*) from $stb
+print data00 $data00
+if $data00 != $totalRows then
+	return -1
+endi
+
+print ============== step3: stop dnode4 
+system sh/exec.sh -n dnode4 -s stop -x SIGINT
+sleep $sleepTimer
+wait_dnode4_offline_0:
+sql show dnodes
+if $rows != 3 then
+  sleep 2000
+  goto wait_dnode4_offline_0
+endi
+print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1
+print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2
+print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3
+#print $data0_4  $data1_4  $data2_4  $data3_4  $data4_4
+#print $data0_5  $data1_5  $data2_5  $data3_5  $data4_5
+#print $data0_6  $data1_6  $data2_6  $data3_6  $data4_6
+#$dnode1Status = $data4_1  
+$dnode2Status = $data4_2
+$dnode3Status = $data4_3  
+$dnode4Status = $data4_4 
+#$dnode5Status = $data4_5
+
+if $dnode4Status != offline then
+  sleep 2000
+  goto wait_dnode4_offline_0
+endi
+
+wait_dnode4_vgroup_offline:
+sql show vgroups
+if $rows != 1 then
+  sleep 2000
+  goto wait_dnode4_vgroup_offline
+endi
+print show vgroups:
+print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
+print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
+print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
+$dnode4Vtatus = $data4_2
+$dnode3Vtatus = $data7_2
+
+if $dnode4Vtatus != offline then
+  sleep 2000
+  goto wait_dnode4_vgroup_offline
+endi
+if $dnode3Vtatus != master then
+  sleep 2000
+  goto wait_dnode4_vgroup_offline
+endi
+
+print ============== step4: drop some tables
+$i = 1
+$dropTblNum = 21
+
+while $i < $dropTblNum
+  $tb = tb . $i
+  sql drop table if exists $tb
+  $i = $i + 1
+endw 
+$tblNum = $tblNum - 20
+
+print ============== step5: restart dnode4, waiting dnode4 synced
+system sh/exec.sh -n dnode4 -s start
+
+wait_dnode4_ready:
+sql show dnodes
+if $rows != 3 then
+  sleep 2000
+  goto wait_dnode4_ready
+endi
+print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1
+print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2
+print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3
+print $data0_4  $data1_4  $data2_4  $data3_4  $data4_4
+#print $data0_5  $data1_5  $data2_5  $data3_5  $data4_5
+#print $data0_6  $data1_6  $data2_6  $data3_6  $data4_6
+#$dnode1Status = $data4_1  
+#$dnode2Status = $data4_2
+$dnode3Status = $data4_3  
+$dnode4Status = $data4_4 
+#$dnode5Status = $data4_5
+
+if $dnode4Status != ready then
+  sleep 2000
+  goto wait_dnode4_ready
+endi
+
+print ============== step6: check result
+
+sql reset query cache
+
+$cnt = 0
+wait_table_dropped:
+$cnt = $cnt + 1
+if $cnt == 20 then
+  return -1
+endi
+sql select count(tbname) from $stb
+if $data00 != $tblNum then
+  print data00: $data00 tblNum: $tblNum
+	sleep 2000
+	goto wait_table_dropped
+endi
+
+
+
+
diff --git a/tests/script/unique/arbitrator/offline_replica3_alterTable_online.sim b/tests/script/unique/arbitrator/offline_replica3_alterTable_online.sim
new file mode 100644
index 0000000000000000000000000000000000000000..24deed212dd0df338afe7296cc7d998498620c26
--- /dev/null
+++ b/tests/script/unique/arbitrator/offline_replica3_alterTable_online.sim
@@ -0,0 +1,205 @@
+system sh/stop_dnodes.sh
+system sh/deploy.sh -n dnode1 -i 1
+system sh/deploy.sh -n dnode2 -i 2
+system sh/deploy.sh -n dnode3 -i 3
+system sh/deploy.sh -n dnode4 -i 4
+
+system sh/cfg.sh -n dnode1 -c numOfMnodes -v 1
+system sh/cfg.sh -n dnode2 -c numOfMnodes -v 1
+system sh/cfg.sh -n dnode3 -c numOfMnodes -v 1
+system sh/cfg.sh -n dnode4 -c numOfMnodes -v 1
+
+system sh/cfg.sh -n dnode1 -c walLevel -v 2
+system sh/cfg.sh -n dnode2 -c walLevel -v 2
+system sh/cfg.sh -n dnode3 -c walLevel -v 2
+system sh/cfg.sh -n dnode4 -c walLevel -v 2
+
+system sh/cfg.sh -n dnode1 -c balanceInterval -v 10
+system sh/cfg.sh -n dnode2 -c balanceInterval -v 10
+system sh/cfg.sh -n dnode3 -c balanceInterval -v 10
+system sh/cfg.sh -n dnode4 -c balanceInterval -v 10
+
+system sh/cfg.sh -n dnode1 -c numOfTotalVnodes -v 4
+system sh/cfg.sh -n dnode2 -c numOfTotalVnodes -v 4
+system sh/cfg.sh -n dnode3 -c numOfTotalVnodes -v 4
+system sh/cfg.sh -n dnode4 -c numOfTotalVnodes -v 4
+
+system sh/cfg.sh -n dnode1 -c alternativeRole -v 1
+system sh/cfg.sh -n dnode2 -c alternativeRole -v 2
+system sh/cfg.sh -n dnode3 -c alternativeRole -v 2
+system sh/cfg.sh -n dnode4 -c alternativeRole -v 2
+
+system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v 4
+system sh/cfg.sh -n dnode2 -c maxtablesPerVnode -v 4
+system sh/cfg.sh -n dnode3 -c maxtablesPerVnode -v 4
+system sh/cfg.sh -n dnode4 -c maxtablesPerVnode -v 4
+
+system sh/cfg.sh -n dnode1 -c arbitrator -v $arbitrator
+system sh/cfg.sh -n dnode2 -c arbitrator -v $arbitrator
+system sh/cfg.sh -n dnode3 -c arbitrator -v $arbitrator
+system sh/cfg.sh -n dnode4 -c arbitrator -v $arbitrator
+
+print ============== step0: start tarbitrator
+system sh/exec_tarbitrator.sh -s start
+
+print ============== step1: start dnode1, only deploy mnode
+system sh/exec.sh -n dnode1 -s start
+sleep 3000
+sql connect
+
+print ============== step2: start dnode2/dnode3/dnode4 and add into cluster , then create database with replica 3, and create table, insert data
+system sh/exec.sh -n dnode2 -s start
+system sh/exec.sh -n dnode3 -s start
+system sh/exec.sh -n dnode4 -s start
+sql create dnode $hostname2
+sql create dnode $hostname3
+sql create dnode $hostname4
+sleep 3000
+
+$totalTableNum = 100
+$sleepTimer = 3000
+
+$db = db
+print create database $db replica 3 maxTables $totalTableNum
+sql create database $db replica 3 maxTables $totalTableNum
+sql use $db
+
+# create table , insert data
+$stb = stb
+sql create table $stb (ts timestamp, c1 int) tags(t1 int)
+$rowNum = 500
+$tblNum = $totalTableNum
+$totalRows = 0
+$tsStart = 1420041600000
+$tsEnd = 0
+
+$i = 0
+while $i < $tblNum
+  $tb = tb . $i
+  sql create table $tb using $stb tags( $i )
+ 
+  $x = 0
+  while $x < $rowNum
+    $ts = $tsStart + $x
+    sql insert into $tb values ( $ts + 0a , $x ) ( $ts + 1a , $x ) ( $ts + 2a , $x ) ( $ts + 3a , $x ) ( $ts + 4a , $x ) ( $ts + 5a , $x ) ( $ts + 6a , $x ) ( $ts + 7a , $x ) ( $ts + 8a , $x ) ( $ts + 9a , $x ) ( $ts + 10a , $x ) ( $ts + 11a , $x ) ( $ts + 12a , $x ) ( $ts + 13a , $x ) ( $ts + 14a , $x ) ( $ts + 15a , $x ) ( $ts + 16a , $x ) ( $ts + 17a , $x ) ( $ts + 18a , $x ) ( $ts + 19a , $x ) ( $ts + 20a , $x ) ( $ts + 21a , $x ) ( $ts + 22a , $x ) ( $ts + 23a , $x ) ( $ts + 24a , $x ) ( $ts + 25a , $x ) ( $ts + 26a , $x ) ( $ts + 27a , $x ) ( $ts + 28a , $x ) ( $ts + 29a , $x ) ( $ts + 30a , $x ) ( $ts + 31a , $x ) ( $ts + 32a , $x ) ( $ts + 33a , $x ) ( $ts + 34a , $x ) ( $ts + 25a , $x ) ( $ts + 26a , $x ) ( $ts + 27a , $x ) ( $ts + 28a , $x ) ( $ts + 29a , $x ) ( $ts + 30a , $x ) ( $ts + 31a , $x ) ( $ts + 32a , $x ) ( $ts + 33a , $x ) ( $ts + 34a , $x ) ( $ts + 35a , $x ) ( $ts + 36a , $x ) ( $ts + 37a , $x ) ( $ts + 38a , $x ) ( $ts + 39a , $x ) ( $ts + 40a , $x ) ( $ts + 41a , $x ) ( $ts + 42a , $x ) ( $ts + 43a , $x ) ( $ts + 44a , $x ) ( $ts + 45a , $x ) ( $ts + 46a , $x ) ( $ts + 47a , $x ) ( $ts + 48a , $x ) ( $ts + 49a , $x ) ( $ts + 50a , $x ) ( $ts + 51a , $x ) ( $ts + 52a , $x ) ( $ts + 53a , $x ) ( $ts + 54a , $x ) ( $ts + 55a , $x ) ( $ts + 56a , $x ) ( $ts + 57a , $x ) ( $ts + 58a , $x ) ( $ts + 59a , $x ) 
+    $x = $x + 60
+  endw 
+  $totalRows = $totalRows + $x
+  print       info: inserted $x rows into $tb and totalRows: $totalRows
+  $i = $i + 1
+endw 
+$tsEnd = $tsStart + $totalRows / $tblNum
+
+sql select count(*) from $stb
+print data00 $data00
+if $data00 != $totalRows then
+	return -1
+endi
+
+print ============== step3: stop dnode4 
+system sh/exec.sh -n dnode4 -s stop -x SIGINT
+sleep $sleepTimer
+wait_dnode4_offline_0:
+sql show dnodes
+if $rows != 4 then
+  sleep 2000
+  goto wait_dnode4_offline_0
+endi
+print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1
+print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2
+print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3
+#print $data0_4  $data1_4  $data2_4  $data3_4  $data4_4
+#print $data0_5  $data1_5  $data2_5  $data3_5  $data4_5
+#print $data0_6  $data1_6  $data2_6  $data3_6  $data4_6
+#$dnode1Status = $data4_1  
+$dnode2Status = $data4_2
+$dnode3Status = $data4_3  
+$dnode4Status = $data4_4 
+#$dnode5Status = $data4_5
+
+if $dnode4Status != offline then
+  sleep 2000
+  goto wait_dnode4_offline_0
+endi
+
+wait_dnode4_vgroup_offline:
+sql show vgroups
+if $rows != 1 then
+  sleep 2000
+  goto wait_dnode4_vgroup_offline
+endi
+print show vgroups:
+print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
+print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
+print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
+$dnode4Vtatus = $data4_2
+$dnode3Vtatus = $data7_2
+
+if $dnode4Vtatus != offline then
+  sleep 2000
+  goto wait_dnode4_vgroup_offline
+endi
+if $dnode3Vtatus != master then
+  sleep 2000
+  goto wait_dnode4_vgroup_offline
+endi
+
+print ============== step4: alter table and insert more data rows
+sql alter table $stb drop column c1
+sql alter table $stb add column f1 double
+
+$i = 0
+while $i < $tblNum
+  $tb = tb . $i
+  sql inset into $tb values (now, 10001) (now + 1s, 10002) (now + 2s, 10003) (now + 3s, 10004)
+  $i = $i + 1
+endw 
+$addRows = 4 * $tblNum
+$totalRows = $totalRows + $addRows
+
+print ============== step5: restart dnode4, waiting dnode4 synced
+system sh/exec.sh -n dnode4 -s start
+
+wait_dnode4_ready:
+sql show dnodes
+if $rows != 4 then
+  sleep 2000
+  goto wait_dnode4_ready
+endi
+print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1
+print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2
+print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3
+print $data0_4  $data1_4  $data2_4  $data3_4  $data4_4
+#print $data0_5  $data1_5  $data2_5  $data3_5  $data4_5
+#print $data0_6  $data1_6  $data2_6  $data3_6  $data4_6
+#$dnode1Status = $data4_1  
+#$dnode2Status = $data4_2
+$dnode3Status = $data4_3  
+$dnode4Status = $data4_4 
+#$dnode5Status = $data4_5
+
+if $dnode4Status != ready then
+  sleep 2000
+  goto wait_dnode4_ready
+endi
+
+print ============== step6: check result
+
+sql reset query cache
+
+$cnt = 0
+wait_table_dropped:
+$cnt = $cnt + 1
+if $cnt == 20 then
+  return -1
+endi
+sql select count(*) from $stb
+if $data00 != $totalRows then
+  print data00: $data00 totalRows: $totalRows
+	sleep 2000
+	goto wait_table_dropped
+endi
+
+
+
+
diff --git a/tests/script/unique/arbitrator/offline_replica3_createTable_online.sim b/tests/script/unique/arbitrator/offline_replica3_createTable_online.sim
new file mode 100644
index 0000000000000000000000000000000000000000..f395d5721192c33bdcdbd8a057f2edd0ca454ada
--- /dev/null
+++ b/tests/script/unique/arbitrator/offline_replica3_createTable_online.sim
@@ -0,0 +1,217 @@
+system sh/stop_dnodes.sh
+system sh/deploy.sh -n dnode1 -i 1
+system sh/deploy.sh -n dnode2 -i 2
+system sh/deploy.sh -n dnode3 -i 3
+system sh/deploy.sh -n dnode4 -i 4
+
+system sh/cfg.sh -n dnode1 -c numOfMnodes -v 1
+system sh/cfg.sh -n dnode2 -c numOfMnodes -v 1
+system sh/cfg.sh -n dnode3 -c numOfMnodes -v 1
+system sh/cfg.sh -n dnode4 -c numOfMnodes -v 1
+
+system sh/cfg.sh -n dnode1 -c walLevel -v 2
+system sh/cfg.sh -n dnode2 -c walLevel -v 2
+system sh/cfg.sh -n dnode3 -c walLevel -v 2
+system sh/cfg.sh -n dnode4 -c walLevel -v 2
+
+system sh/cfg.sh -n dnode1 -c balanceInterval -v 10
+system sh/cfg.sh -n dnode2 -c balanceInterval -v 10
+system sh/cfg.sh -n dnode3 -c balanceInterval -v 10
+system sh/cfg.sh -n dnode4 -c balanceInterval -v 10
+
+system sh/cfg.sh -n dnode1 -c numOfTotalVnodes -v 4
+system sh/cfg.sh -n dnode2 -c numOfTotalVnodes -v 4
+system sh/cfg.sh -n dnode3 -c numOfTotalVnodes -v 4
+system sh/cfg.sh -n dnode4 -c numOfTotalVnodes -v 4
+
+system sh/cfg.sh -n dnode1 -c alternativeRole -v 1
+system sh/cfg.sh -n dnode2 -c alternativeRole -v 2
+system sh/cfg.sh -n dnode3 -c alternativeRole -v 2
+system sh/cfg.sh -n dnode4 -c alternativeRole -v 2
+
+system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v 4
+system sh/cfg.sh -n dnode2 -c maxtablesPerVnode -v 4
+system sh/cfg.sh -n dnode3 -c maxtablesPerVnode -v 4
+system sh/cfg.sh -n dnode4 -c maxtablesPerVnode -v 4
+
+system sh/cfg.sh -n dnode1 -c arbitrator -v $arbitrator
+system sh/cfg.sh -n dnode2 -c arbitrator -v $arbitrator
+system sh/cfg.sh -n dnode3 -c arbitrator -v $arbitrator
+system sh/cfg.sh -n dnode4 -c arbitrator -v $arbitrator
+
+print ============== step0: start tarbitrator
+system sh/exec_tarbitrator.sh -s start
+
+print ============== step1: start dnode1, only deploy mnode
+system sh/exec.sh -n dnode1 -s start
+sleep 3000
+sql connect
+
+print ============== step2: start dnode2/dnode3/dnode4 and add into cluster , then create database with replica 3, and create table, insert data
+system sh/exec.sh -n dnode2 -s start
+system sh/exec.sh -n dnode3 -s start
+system sh/exec.sh -n dnode4 -s start
+sql create dnode $hostname2
+sql create dnode $hostname3
+sql create dnode $hostname4
+sleep 3000
+
+$totalTableNum = 100
+$sleepTimer = 3000
+
+$db = db
+print create database $db replica 3 maxTables $totalTableNum
+sql create database $db replica 3 maxTables $totalTableNum
+sql use $db
+
+# create table , insert data
+$stb = stb
+sql create table $stb (ts timestamp, c1 int) tags(t1 int)
+$rowNum = 500
+$tblNum = $totalTableNum
+$totalRows = 0
+$tsStart = 1420041600000
+$tsEnd = 0
+
+$i = 0
+while $i < $tblNum
+  $tb = tb . $i
+  sql create table $tb using $stb tags( $i )
+ 
+  $x = 0
+  while $x < $rowNum
+    $ts = $tsStart + $x
+    sql insert into $tb values ( $ts + 0a , $x ) ( $ts + 1a , $x ) ( $ts + 2a , $x ) ( $ts + 3a , $x ) ( $ts + 4a , $x ) ( $ts + 5a , $x ) ( $ts + 6a , $x ) ( $ts + 7a , $x ) ( $ts + 8a , $x ) ( $ts + 9a , $x ) ( $ts + 10a , $x ) ( $ts + 11a , $x ) ( $ts + 12a , $x ) ( $ts + 13a , $x ) ( $ts + 14a , $x ) ( $ts + 15a , $x ) ( $ts + 16a , $x ) ( $ts + 17a , $x ) ( $ts + 18a , $x ) ( $ts + 19a , $x ) ( $ts + 20a , $x ) ( $ts + 21a , $x ) ( $ts + 22a , $x ) ( $ts + 23a , $x ) ( $ts + 24a , $x ) ( $ts + 25a , $x ) ( $ts + 26a , $x ) ( $ts + 27a , $x ) ( $ts + 28a , $x ) ( $ts + 29a , $x ) ( $ts + 30a , $x ) ( $ts + 31a , $x ) ( $ts + 32a , $x ) ( $ts + 33a , $x ) ( $ts + 34a , $x ) ( $ts + 25a , $x ) ( $ts + 26a , $x ) ( $ts + 27a , $x ) ( $ts + 28a , $x ) ( $ts + 29a , $x ) ( $ts + 30a , $x ) ( $ts + 31a , $x ) ( $ts + 32a , $x ) ( $ts + 33a , $x ) ( $ts + 34a , $x ) ( $ts + 35a , $x ) ( $ts + 36a , $x ) ( $ts + 37a , $x ) ( $ts + 38a , $x ) ( $ts + 39a , $x ) ( $ts + 40a , $x ) ( $ts + 41a , $x ) ( $ts + 42a , $x ) ( $ts + 43a , $x ) ( $ts + 44a , $x ) ( $ts + 45a , $x ) ( $ts + 46a , $x ) ( $ts + 47a , $x ) ( $ts + 48a , $x ) ( $ts + 49a , $x ) ( $ts + 50a , $x ) ( $ts + 51a , $x ) ( $ts + 52a , $x ) ( $ts + 53a , $x ) ( $ts + 54a , $x ) ( $ts + 55a , $x ) ( $ts + 56a , $x ) ( $ts + 57a , $x ) ( $ts + 58a , $x ) ( $ts + 59a , $x ) 
+    $x = $x + 60
+  endw 
+  $totalRows = $totalRows + $x
+  print       info: inserted $x rows into $tb and totalRows: $totalRows
+  $i = $i + 1
+endw 
+$tsEnd = $tsStart + $totalRows / $tblNum
+
+sql select count(*) from $stb
+print data00 $data00
+if $data00 != $totalRows then
+	return -1
+endi
+
+print ============== step3: stop dnode4 
+system sh/exec.sh -n dnode4 -s stop -x SIGINT
+sleep $sleepTimer
+wait_dnode4_offline_0:
+sql show dnodes
+if $rows != 4 then
+  sleep 2000
+  goto wait_dnode4_offline_0
+endi
+print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1
+print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2
+print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3
+#print $data0_4  $data1_4  $data2_4  $data3_4  $data4_4
+#print $data0_5  $data1_5  $data2_5  $data3_5  $data4_5
+#print $data0_6  $data1_6  $data2_6  $data3_6  $data4_6
+#$dnode1Status = $data4_1  
+$dnode2Status = $data4_2
+$dnode3Status = $data4_3  
+$dnode4Status = $data4_4 
+#$dnode5Status = $data4_5
+
+if $dnode4Status != offline then
+  sleep 2000
+  goto wait_dnode4_offline_0
+endi
+
+wait_dnode4_vgroup_offline:
+sql show vgroups
+if $rows != 1 then
+  sleep 2000
+  goto wait_dnode4_vgroup_offline
+endi
+print show vgroups:
+print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
+print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
+print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
+$dnode4Vtatus = $data4_2
+$dnode3Vtatus = $data7_2
+
+if $dnode4Vtatus != offline then
+  sleep 2000
+  goto wait_dnode4_vgroup_offline
+endi
+if $dnode3Vtatus != master then
+  sleep 2000
+  goto wait_dnode4_vgroup_offline
+endi
+
+print ============== step4: create more tables and insert data rows
+$tsStart = $tsEnd + 1000
+$i = $tblNum
+$tblNum = $tblNum * 2
+while $i < $tblNum
+  $tb = tb . $i
+  sql create table $tb using $stb tags( $i )
+  
+  $x = 0
+  while $x < $rowNum
+    $ts = $tsStart + $x
+    sql insert into $tb values ( $ts + 0a , $x ) ( $ts + 1a , $x ) ( $ts + 2a , $x ) ( $ts + 3a , $x ) ( $ts + 4a , $x ) ( $ts + 5a , $x ) ( $ts + 6a , $x ) ( $ts + 7a , $x ) ( $ts + 8a , $x ) ( $ts + 9a , $x ) ( $ts + 10a , $x ) ( $ts + 11a , $x ) ( $ts + 12a , $x ) ( $ts + 13a , $x ) ( $ts + 14a , $x ) ( $ts + 15a , $x ) ( $ts + 16a , $x ) ( $ts + 17a , $x ) ( $ts + 18a , $x ) ( $ts + 19a , $x ) ( $ts + 20a , $x ) ( $ts + 21a , $x ) ( $ts + 22a , $x ) ( $ts + 23a , $x ) ( $ts + 24a , $x ) ( $ts + 25a , $x ) ( $ts + 26a , $x ) ( $ts + 27a , $x ) ( $ts + 28a , $x ) ( $ts + 29a , $x ) ( $ts + 30a , $x ) ( $ts + 31a , $x ) ( $ts + 32a , $x ) ( $ts + 33a , $x ) ( $ts + 34a , $x ) ( $ts + 25a , $x ) ( $ts + 26a , $x ) ( $ts + 27a , $x ) ( $ts + 28a , $x ) ( $ts + 29a , $x ) ( $ts + 30a , $x ) ( $ts + 31a , $x ) ( $ts + 32a , $x ) ( $ts + 33a , $x ) ( $ts + 34a , $x ) ( $ts + 35a , $x ) ( $ts + 36a , $x ) ( $ts + 37a , $x ) ( $ts + 38a , $x ) ( $ts + 39a , $x ) ( $ts + 40a , $x ) ( $ts + 41a , $x ) ( $ts + 42a , $x ) ( $ts + 43a , $x ) ( $ts + 44a , $x ) ( $ts + 45a , $x ) ( $ts + 46a , $x ) ( $ts + 47a , $x ) ( $ts + 48a , $x ) ( $ts + 49a , $x ) ( $ts + 50a , $x ) ( $ts + 51a , $x ) ( $ts + 52a , $x ) ( $ts + 53a , $x ) ( $ts + 54a , $x ) ( $ts + 55a , $x ) ( $ts + 56a , $x ) ( $ts + 57a , $x ) ( $ts + 58a , $x ) ( $ts + 59a , $x ) 
+    $x = $x + 60
+  endw 
+  $totalRows = $totalRows + $x
+  print       info: inserted $x rows into $tb and totalRows: $totalRows
+  $i = $i + 1
+endw 
+
+sql select count(*) from $stb
+print data00 $data00
+if $data00 != $totalRows then
+	return -1
+endi
+
+print ============== step5: restart dnode4, waiting dnode4 synced
+system sh/exec.sh -n dnode4 -s start
+
+wait_dnode4_ready:
+sql show dnodes
+if $rows != 4 then
+  sleep 2000
+  goto wait_dnode4_ready
+endi
+print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1
+print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2
+print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3
+print $data0_4  $data1_4  $data2_4  $data3_4  $data4_4
+#print $data0_5  $data1_5  $data2_5  $data3_5  $data4_5
+#print $data0_6  $data1_6  $data2_6  $data3_6  $data4_6
+#$dnode1Status = $data4_1  
+#$dnode2Status = $data4_2
+$dnode3Status = $data4_3  
+$dnode4Status = $data4_4 
+#$dnode5Status = $data4_5
+
+if $dnode4Status != ready then
+  sleep 2000
+  goto wait_dnode4_ready
+endi
+
+print ============== step6: check result
+
+sql reset query cache
+
+$cnt = 0
+wait_table_altered:
+$cnt = $cnt + 1
+if $cnt == 20 then
+  return -1
+endi
+sql select count(*) from $stb
+if $data00 != $totalRows then
+  print data00: $data00
+	sleep 2000
+	goto wait_table_altered
+endi
+
+
+
+
diff --git a/tests/script/unique/arbitrator/offline_replica3_dropDb_online.sim b/tests/script/unique/arbitrator/offline_replica3_dropDb_online.sim
new file mode 100644
index 0000000000000000000000000000000000000000..0c7211d9e57428f56c8cd36bc16cc8f85d58bd4a
--- /dev/null
+++ b/tests/script/unique/arbitrator/offline_replica3_dropDb_online.sim
@@ -0,0 +1,169 @@
+system sh/stop_dnodes.sh
+system sh/deploy.sh -n dnode1 -i 1
+system sh/deploy.sh -n dnode2 -i 2
+system sh/deploy.sh -n dnode3 -i 3
+system sh/deploy.sh -n dnode4 -i 4
+
+system sh/cfg.sh -n dnode1 -c numOfMnodes -v 1
+system sh/cfg.sh -n dnode2 -c numOfMnodes -v 1
+system sh/cfg.sh -n dnode3 -c numOfMnodes -v 1
+system sh/cfg.sh -n dnode4 -c numOfMnodes -v 1
+
+system sh/cfg.sh -n dnode1 -c walLevel -v 2
+system sh/cfg.sh -n dnode2 -c walLevel -v 2
+system sh/cfg.sh -n dnode3 -c walLevel -v 2
+system sh/cfg.sh -n dnode4 -c walLevel -v 2
+
+system sh/cfg.sh -n dnode1 -c balanceInterval -v 10
+system sh/cfg.sh -n dnode2 -c balanceInterval -v 10
+system sh/cfg.sh -n dnode3 -c balanceInterval -v 10
+system sh/cfg.sh -n dnode4 -c balanceInterval -v 10
+
+system sh/cfg.sh -n dnode1 -c numOfTotalVnodes -v 4
+system sh/cfg.sh -n dnode2 -c numOfTotalVnodes -v 4
+system sh/cfg.sh -n dnode3 -c numOfTotalVnodes -v 4
+system sh/cfg.sh -n dnode4 -c numOfTotalVnodes -v 4
+
+system sh/cfg.sh -n dnode1 -c alternativeRole -v 1
+system sh/cfg.sh -n dnode2 -c alternativeRole -v 2
+system sh/cfg.sh -n dnode3 -c alternativeRole -v 2
+system sh/cfg.sh -n dnode4 -c alternativeRole -v 2
+
+system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v 4
+system sh/cfg.sh -n dnode2 -c maxtablesPerVnode -v 4
+system sh/cfg.sh -n dnode3 -c maxtablesPerVnode -v 4
+system sh/cfg.sh -n dnode4 -c maxtablesPerVnode -v 4
+
+system sh/cfg.sh -n dnode1 -c arbitrator -v $arbitrator
+system sh/cfg.sh -n dnode2 -c arbitrator -v $arbitrator
+system sh/cfg.sh -n dnode3 -c arbitrator -v $arbitrator
+system sh/cfg.sh -n dnode4 -c arbitrator -v $arbitrator
+
+print ============== step0: start tarbitrator
+system sh/exec_tarbitrator.sh -s start
+
+print ============== step1: start dnode1, only deploy mnode
+system sh/exec.sh -n dnode1 -s start
+sleep 3000
+sql connect
+
+print ============== step2: start dnode2/dnode3/dnode4 and add into cluster , then create database with replica 3, and create table, insert data
+system sh/exec.sh -n dnode2 -s start
+system sh/exec.sh -n dnode3 -s start
+system sh/exec.sh -n dnode4 -s start
+sql create dnode $hostname2
+sql create dnode $hostname3
+sql create dnode $hostname4
+sleep 3000
+
+$totalTableNum = 100
+$sleepTimer = 3000
+
+$db = db
+print create database $db replica 3 maxTables $totalTableNum
+sql create database $db replica 3 maxTables $totalTableNum
+sql use $db
+
+# create table , insert data
+$stb = stb
+sql create table $stb (ts timestamp, c1 int) tags(t1 int)
+$rowNum = 500
+$tblNum = $totalTableNum
+$totalRows = 0
+$tsStart = 1420041600000
+$tsEnd = 0
+
+$i = 0
+while $i < $tblNum
+  $tb = tb . $i
+  sql create table $tb using $stb tags( $i )
+ 
+  $x = 0
+  while $x < $rowNum
+    $ts = $tsStart + $x
+    sql insert into $tb values ( $ts + 0a , $x ) ( $ts + 1a , $x ) ( $ts + 2a , $x ) ( $ts + 3a , $x ) ( $ts + 4a , $x ) ( $ts + 5a , $x ) ( $ts + 6a , $x ) ( $ts + 7a , $x ) ( $ts + 8a , $x ) ( $ts + 9a , $x ) ( $ts + 10a , $x ) ( $ts + 11a , $x ) ( $ts + 12a , $x ) ( $ts + 13a , $x ) ( $ts + 14a , $x ) ( $ts + 15a , $x ) ( $ts + 16a , $x ) ( $ts + 17a , $x ) ( $ts + 18a , $x ) ( $ts + 19a , $x ) ( $ts + 20a , $x ) ( $ts + 21a , $x ) ( $ts + 22a , $x ) ( $ts + 23a , $x ) ( $ts + 24a , $x ) ( $ts + 25a , $x ) ( $ts + 26a , $x ) ( $ts + 27a , $x ) ( $ts + 28a , $x ) ( $ts + 29a , $x ) ( $ts + 30a , $x ) ( $ts + 31a , $x ) ( $ts + 32a , $x ) ( $ts + 33a , $x ) ( $ts + 34a , $x ) ( $ts + 25a , $x ) ( $ts + 26a , $x ) ( $ts + 27a , $x ) ( $ts + 28a , $x ) ( $ts + 29a , $x ) ( $ts + 30a , $x ) ( $ts + 31a , $x ) ( $ts + 32a , $x ) ( $ts + 33a , $x ) ( $ts + 34a , $x ) ( $ts + 35a , $x ) ( $ts + 36a , $x ) ( $ts + 37a , $x ) ( $ts + 38a , $x ) ( $ts + 39a , $x ) ( $ts + 40a , $x ) ( $ts + 41a , $x ) ( $ts + 42a , $x ) ( $ts + 43a , $x ) ( $ts + 44a , $x ) ( $ts + 45a , $x ) ( $ts + 46a , $x ) ( $ts + 47a , $x ) ( $ts + 48a , $x ) ( $ts + 49a , $x ) ( $ts + 50a , $x ) ( $ts + 51a , $x ) ( $ts + 52a , $x ) ( $ts + 53a , $x ) ( $ts + 54a , $x ) ( $ts + 55a , $x ) ( $ts + 56a , $x ) ( $ts + 57a , $x ) ( $ts + 58a , $x ) ( $ts + 59a , $x ) 
+    $x = $x + 60
+  endw 
+  $totalRows = $totalRows + $x
+  print       info: inserted $x rows into $tb and totalRows: $totalRows
+  $i = $i + 1
+endw 
+$tsEnd = $tsStart + $totalRows / $tblNum
+
+sql select count(*) from $stb
+print data00 $data00
+if $data00 != $totalRows then
+	return -1
+endi
+
+print ============== step3: stop dnode4 
+system sh/exec.sh -n dnode4 -s stop -x SIGINT
+sleep $sleepTimer
+wait_dnode4_offline_0:
+sql show dnodes
+if $rows != 4 then
+  sleep 2000
+  goto wait_dnode4_offline_0
+endi
+print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1
+print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2
+print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3
+#print $data0_4  $data1_4  $data2_4  $data3_4  $data4_4
+#print $data0_5  $data1_5  $data2_5  $data3_5  $data4_5
+#print $data0_6  $data1_6  $data2_6  $data3_6  $data4_6
+#$dnode1Status = $data4_1  
+$dnode2Status = $data4_2
+$dnode3Status = $data4_3  
+$dnode4Status = $data4_4 
+#$dnode5Status = $data4_5
+
+if $dnode4Status != offline then
+  sleep 2000
+  goto wait_dnode4_offline_0
+endi
+
+wait_dnode4_vgroup_offline:
+sql show vgroups
+if $rows != 1 then
+  sleep 2000
+  goto wait_dnode4_vgroup_offline
+endi
+print show vgroups:
+print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
+print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
+print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
+$dnode4Vtatus = $data4_2
+$dnode3Vtatus = $data7_2
+
+if $dnode4Vtatus != offline then
+  sleep 2000
+  goto wait_dnode4_vgroup_offline
+endi
+if $dnode3Vtatus != master then
+  sleep 2000
+  goto wait_dnode4_vgroup_offline
+endi
+
+print ============== step4: drop db
+sql drop database $db
+
+print ============== step5: restart dnode4 
+system sh/exec.sh -n dnode4 -s start
+
+print ============== step6: check result
+sql reset query cache
+$cnt = 0
+wait_database_dropped:
+$cnt = $cnt + 1
+if $cnt == 20 then
+  return -1
+endi
+sql show databases
+if $rows != 0 then
+	sleep 2000
+	goto wait_database_dropped
+endi
+
+
+
+
diff --git a/tests/script/unique/arbitrator/offline_replica3_dropTable_online.sim b/tests/script/unique/arbitrator/offline_replica3_dropTable_online.sim
new file mode 100644
index 0000000000000000000000000000000000000000..8e59acc23430104890560197770de6f3591dfeff
--- /dev/null
+++ b/tests/script/unique/arbitrator/offline_replica3_dropTable_online.sim
@@ -0,0 +1,203 @@
+system sh/stop_dnodes.sh
+system sh/deploy.sh -n dnode1 -i 1
+system sh/deploy.sh -n dnode2 -i 2
+system sh/deploy.sh -n dnode3 -i 3
+system sh/deploy.sh -n dnode4 -i 4
+
+system sh/cfg.sh -n dnode1 -c numOfMnodes -v 1
+system sh/cfg.sh -n dnode2 -c numOfMnodes -v 1
+system sh/cfg.sh -n dnode3 -c numOfMnodes -v 1
+system sh/cfg.sh -n dnode4 -c numOfMnodes -v 1
+
+system sh/cfg.sh -n dnode1 -c walLevel -v 2
+system sh/cfg.sh -n dnode2 -c walLevel -v 2
+system sh/cfg.sh -n dnode3 -c walLevel -v 2
+system sh/cfg.sh -n dnode4 -c walLevel -v 2
+
+system sh/cfg.sh -n dnode1 -c balanceInterval -v 10
+system sh/cfg.sh -n dnode2 -c balanceInterval -v 10
+system sh/cfg.sh -n dnode3 -c balanceInterval -v 10
+system sh/cfg.sh -n dnode4 -c balanceInterval -v 10
+
+system sh/cfg.sh -n dnode1 -c numOfTotalVnodes -v 4
+system sh/cfg.sh -n dnode2 -c numOfTotalVnodes -v 4
+system sh/cfg.sh -n dnode3 -c numOfTotalVnodes -v 4
+system sh/cfg.sh -n dnode4 -c numOfTotalVnodes -v 4
+
+system sh/cfg.sh -n dnode1 -c alternativeRole -v 1
+system sh/cfg.sh -n dnode2 -c alternativeRole -v 2
+system sh/cfg.sh -n dnode3 -c alternativeRole -v 2
+system sh/cfg.sh -n dnode4 -c alternativeRole -v 2
+
+system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v 4
+system sh/cfg.sh -n dnode2 -c maxtablesPerVnode -v 4
+system sh/cfg.sh -n dnode3 -c maxtablesPerVnode -v 4
+system sh/cfg.sh -n dnode4 -c maxtablesPerVnode -v 4
+
+system sh/cfg.sh -n dnode1 -c arbitrator -v $arbitrator
+system sh/cfg.sh -n dnode2 -c arbitrator -v $arbitrator
+system sh/cfg.sh -n dnode3 -c arbitrator -v $arbitrator
+system sh/cfg.sh -n dnode4 -c arbitrator -v $arbitrator
+
+print ============== step0: start tarbitrator
+system sh/exec_tarbitrator.sh -s start
+
+print ============== step1: start dnode1, only deploy mnode
+system sh/exec.sh -n dnode1 -s start
+sleep 3000
+sql connect
+
+print ============== step2: start dnode2/dnode3/dnode4 and add into cluster , then create database with replica 3, and create table, insert data
+system sh/exec.sh -n dnode2 -s start
+system sh/exec.sh -n dnode3 -s start
+system sh/exec.sh -n dnode4 -s start
+sql create dnode $hostname2
+sql create dnode $hostname3
+sql create dnode $hostname4
+sleep 3000
+
+$totalTableNum = 100
+$sleepTimer = 3000
+
+$db = db
+print create database $db replica 3 maxTables $totalTableNum
+sql create database $db replica 3 maxTables $totalTableNum
+sql use $db
+
+# create table , insert data
+$stb = stb
+sql create table $stb (ts timestamp, c1 int) tags(t1 int)
+$rowNum = 500
+$tblNum = $totalTableNum
+$totalRows = 0
+$tsStart = 1420041600000
+$tsEnd = 0
+
+$i = 0
+while $i < $tblNum
+  $tb = tb . $i
+  sql create table $tb using $stb tags( $i )
+ 
+  $x = 0
+  while $x < $rowNum
+    $ts = $tsStart + $x
+    sql insert into $tb values ( $ts + 0a , $x ) ( $ts + 1a , $x ) ( $ts + 2a , $x ) ( $ts + 3a , $x ) ( $ts + 4a , $x ) ( $ts + 5a , $x ) ( $ts + 6a , $x ) ( $ts + 7a , $x ) ( $ts + 8a , $x ) ( $ts + 9a , $x ) ( $ts + 10a , $x ) ( $ts + 11a , $x ) ( $ts + 12a , $x ) ( $ts + 13a , $x ) ( $ts + 14a , $x ) ( $ts + 15a , $x ) ( $ts + 16a , $x ) ( $ts + 17a , $x ) ( $ts + 18a , $x ) ( $ts + 19a , $x ) ( $ts + 20a , $x ) ( $ts + 21a , $x ) ( $ts + 22a , $x ) ( $ts + 23a , $x ) ( $ts + 24a , $x ) ( $ts + 25a , $x ) ( $ts + 26a , $x ) ( $ts + 27a , $x ) ( $ts + 28a , $x ) ( $ts + 29a , $x ) ( $ts + 30a , $x ) ( $ts + 31a , $x ) ( $ts + 32a , $x ) ( $ts + 33a , $x ) ( $ts + 34a , $x ) ( $ts + 25a , $x ) ( $ts + 26a , $x ) ( $ts + 27a , $x ) ( $ts + 28a , $x ) ( $ts + 29a , $x ) ( $ts + 30a , $x ) ( $ts + 31a , $x ) ( $ts + 32a , $x ) ( $ts + 33a , $x ) ( $ts + 34a , $x ) ( $ts + 35a , $x ) ( $ts + 36a , $x ) ( $ts + 37a , $x ) ( $ts + 38a , $x ) ( $ts + 39a , $x ) ( $ts + 40a , $x ) ( $ts + 41a , $x ) ( $ts + 42a , $x ) ( $ts + 43a , $x ) ( $ts + 44a , $x ) ( $ts + 45a , $x ) ( $ts + 46a , $x ) ( $ts + 47a , $x ) ( $ts + 48a , $x ) ( $ts + 49a , $x ) ( $ts + 50a , $x ) ( $ts + 51a , $x ) ( $ts + 52a , $x ) ( $ts + 53a , $x ) ( $ts + 54a , $x ) ( $ts + 55a , $x ) ( $ts + 56a , $x ) ( $ts + 57a , $x ) ( $ts + 58a , $x ) ( $ts + 59a , $x ) 
+    $x = $x + 60
+  endw 
+  $totalRows = $totalRows + $x
+  print       info: inserted $x rows into $tb and totalRows: $totalRows
+  $i = $i + 1
+endw 
+$tsEnd = $tsStart + $totalRows / $tblNum
+
+sql select count(*) from $stb
+print data00 $data00
+if $data00 != $totalRows then
+	return -1
+endi
+
+print ============== step3: stop dnode4 
+system sh/exec.sh -n dnode4 -s stop -x SIGINT
+sleep $sleepTimer
+wait_dnode4_offline_0:
+sql show dnodes
+if $rows != 4 then
+  sleep 2000
+  goto wait_dnode4_offline_0
+endi
+print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1
+print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2
+print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3
+#print $data0_4  $data1_4  $data2_4  $data3_4  $data4_4
+#print $data0_5  $data1_5  $data2_5  $data3_5  $data4_5
+#print $data0_6  $data1_6  $data2_6  $data3_6  $data4_6
+#$dnode1Status = $data4_1  
+$dnode2Status = $data4_2
+$dnode3Status = $data4_3  
+$dnode4Status = $data4_4 
+#$dnode5Status = $data4_5
+
+if $dnode4Status != offline then
+  sleep 2000
+  goto wait_dnode4_offline_0
+endi
+
+wait_dnode4_vgroup_offline:
+sql show vgroups
+if $rows != 1 then
+  sleep 2000
+  goto wait_dnode4_vgroup_offline
+endi
+print show vgroups:
+print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
+print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
+print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
+$dnode4Vtatus = $data4_2
+$dnode3Vtatus = $data7_2
+
+if $dnode4Vtatus != offline then
+  sleep 2000
+  goto wait_dnode4_vgroup_offline
+endi
+if $dnode3Vtatus != master then
+  sleep 2000
+  goto wait_dnode4_vgroup_offline
+endi
+
+print ============== step4: drop some tables
+$i = 1
+$dropTblNum = 21
+
+while $i < $dropTblNum
+  $tb = tb . $i
+  sql drop table if exists $tb
+  $i = $i + 1
+endw 
+$tblNum = $tblNum - 20
+
+print ============== step5: restart dnode4, waiting dnode4 synced
+system sh/exec.sh -n dnode4 -s start
+
+wait_dnode4_ready:
+sql show dnodes
+if $rows != 4 then
+  sleep 2000
+  goto wait_dnode4_ready
+endi
+print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1
+print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2
+print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3
+print $data0_4  $data1_4  $data2_4  $data3_4  $data4_4
+#print $data0_5  $data1_5  $data2_5  $data3_5  $data4_5
+#print $data0_6  $data1_6  $data2_6  $data3_6  $data4_6
+#$dnode1Status = $data4_1  
+#$dnode2Status = $data4_2
+$dnode3Status = $data4_3  
+$dnode4Status = $data4_4 
+#$dnode5Status = $data4_5
+
+if $dnode4Status != ready then
+  sleep 2000
+  goto wait_dnode4_ready
+endi
+
+print ============== step6: check result
+
+sql reset query cache
+
+$cnt = 0
+wait_table_dropped:
+$cnt = $cnt + 1
+if $cnt == 20 then
+  return -1
+endi
+sql select count(tbname) from $stb
+if $data00 != $tblNum then
+  print data00: $data00 tblNum: $tblNum
+	sleep 2000
+	goto wait_table_dropped
+endi
+
+
+
+
diff --git a/tests/script/unique/arbitrator/sync_replica2_alterTable_add.sim b/tests/script/unique/arbitrator/sync_replica2_alterTable_add.sim
new file mode 100644
index 0000000000000000000000000000000000000000..06747ed5892d29e6c73372ac45ccdcaac9aef37f
--- /dev/null
+++ b/tests/script/unique/arbitrator/sync_replica2_alterTable_add.sim
@@ -0,0 +1,193 @@
+system sh/stop_dnodes.sh
+system sh/deploy.sh -n dnode1 -i 1
+system sh/deploy.sh -n dnode2 -i 2
+system sh/deploy.sh -n dnode3 -i 3
+system sh/deploy.sh -n dnode4 -i 4
+
+system sh/cfg.sh -n dnode1 -c numOfMnodes -v 1
+system sh/cfg.sh -n dnode2 -c numOfMnodes -v 1
+system sh/cfg.sh -n dnode3 -c numOfMnodes -v 1
+system sh/cfg.sh -n dnode4 -c numOfMnodes -v 1
+
+system sh/cfg.sh -n dnode1 -c walLevel -v 2
+system sh/cfg.sh -n dnode2 -c walLevel -v 2
+system sh/cfg.sh -n dnode3 -c walLevel -v 2
+system sh/cfg.sh -n dnode4 -c walLevel -v 2
+
+system sh/cfg.sh -n dnode1 -c balanceInterval -v 10
+system sh/cfg.sh -n dnode2 -c balanceInterval -v 10
+system sh/cfg.sh -n dnode3 -c balanceInterval -v 10
+system sh/cfg.sh -n dnode4 -c balanceInterval -v 10
+
+system sh/cfg.sh -n dnode1 -c numOfTotalVnodes -v 4
+system sh/cfg.sh -n dnode2 -c numOfTotalVnodes -v 4
+system sh/cfg.sh -n dnode3 -c numOfTotalVnodes -v 4
+system sh/cfg.sh -n dnode4 -c numOfTotalVnodes -v 4
+
+system sh/cfg.sh -n dnode1 -c alternativeRole -v 1
+system sh/cfg.sh -n dnode2 -c alternativeRole -v 2
+system sh/cfg.sh -n dnode3 -c alternativeRole -v 2
+system sh/cfg.sh -n dnode4 -c alternativeRole -v 2
+
+system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v 4
+system sh/cfg.sh -n dnode2 -c maxtablesPerVnode -v 4
+system sh/cfg.sh -n dnode3 -c maxtablesPerVnode -v 4
+system sh/cfg.sh -n dnode4 -c maxtablesPerVnode -v 4
+
+system sh/cfg.sh -n dnode1 -c arbitrator -v $arbitrator
+system sh/cfg.sh -n dnode2 -c arbitrator -v $arbitrator
+system sh/cfg.sh -n dnode3 -c arbitrator -v $arbitrator
+system sh/cfg.sh -n dnode4 -c arbitrator -v $arbitrator
+
+print ============== step0: start tarbitrator
+system sh/exec_tarbitrator.sh -s start
+
+print ============== step1: start dnode1, only deploy mnode
+system sh/exec.sh -n dnode1 -s start
+sleep 3000
+sql connect
+
+print ============== step2: start dnode2/dnode3/dnode4 and add into cluster , then create database with replica 3, and create table, insert data
+system sh/exec.sh -n dnode2 -s start
+#system sh/exec.sh -n dnode3 -s start
+system sh/exec.sh -n dnode4 -s start
+sql create dnode $hostname2
+#sql create dnode $hostname3
+sql create dnode $hostname4
+sleep 3000
+
+$totalTableNum = 100
+$sleepTimer = 3000
+
+$db = db
+print create database $db replica 3 maxTables $totalTableNum
+sql create database $db replica 3 maxTables $totalTableNum
+sql use $db
+
+# create table , insert data
+$stb = stb
+sql create table $stb (ts timestamp, c1 int) tags(t1 int)
+$rowNum = 500
+$tblNum = $totalTableNum
+$totalRows = 0
+$tsStart = 1420041600000
+$tsEnd = 0
+
+$i = 0
+while $i < $tblNum
+  $tb = tb . $i
+  sql create table $tb using $stb tags( $i )
+ 
+  $x = 0
+  while $x < $rowNum
+    $ts = $tsStart + $x
+    sql insert into $tb values ( $ts + 0a , $x ) ( $ts + 1a , $x ) ( $ts + 2a , $x ) ( $ts + 3a , $x ) ( $ts + 4a , $x ) ( $ts + 5a , $x ) ( $ts + 6a , $x ) ( $ts + 7a , $x ) ( $ts + 8a , $x ) ( $ts + 9a , $x ) ( $ts + 10a , $x ) ( $ts + 11a , $x ) ( $ts + 12a , $x ) ( $ts + 13a , $x ) ( $ts + 14a , $x ) ( $ts + 15a , $x ) ( $ts + 16a , $x ) ( $ts + 17a , $x ) ( $ts + 18a , $x ) ( $ts + 19a , $x ) ( $ts + 20a , $x ) ( $ts + 21a , $x ) ( $ts + 22a , $x ) ( $ts + 23a , $x ) ( $ts + 24a , $x ) ( $ts + 25a , $x ) ( $ts + 26a , $x ) ( $ts + 27a , $x ) ( $ts + 28a , $x ) ( $ts + 29a , $x ) ( $ts + 30a , $x ) ( $ts + 31a , $x ) ( $ts + 32a , $x ) ( $ts + 33a , $x ) ( $ts + 34a , $x ) ( $ts + 25a , $x ) ( $ts + 26a , $x ) ( $ts + 27a , $x ) ( $ts + 28a , $x ) ( $ts + 29a , $x ) ( $ts + 30a , $x ) ( $ts + 31a , $x ) ( $ts + 32a , $x ) ( $ts + 33a , $x ) ( $ts + 34a , $x ) ( $ts + 35a , $x ) ( $ts + 36a , $x ) ( $ts + 37a , $x ) ( $ts + 38a , $x ) ( $ts + 39a , $x ) ( $ts + 40a , $x ) ( $ts + 41a , $x ) ( $ts + 42a , $x ) ( $ts + 43a , $x ) ( $ts + 44a , $x ) ( $ts + 45a , $x ) ( $ts + 46a , $x ) ( $ts + 47a , $x ) ( $ts + 48a , $x ) ( $ts + 49a , $x ) ( $ts + 50a , $x ) ( $ts + 51a , $x ) ( $ts + 52a , $x ) ( $ts + 53a , $x ) ( $ts + 54a , $x ) ( $ts + 55a , $x ) ( $ts + 56a , $x ) ( $ts + 57a , $x ) ( $ts + 58a , $x ) ( $ts + 59a , $x ) 
+    $x = $x + 60
+  endw 
+  $totalRows = $totalRows + $x
+  print       info: inserted $x rows into $tb and totalRows: $totalRows
+  $i = $i + 1
+endw 
+$tsEnd = $tsStart + $totalRows / $tblNum
+
+sql select count(*) from $stb
+print data00 $data00
+if $data00 != $totalRows then
+	return -1
+endi
+
+print ============== step3: stop dnode4 
+system sh/exec.sh -n dnode4 -s stop -x SIGINT
+sleep $sleepTimer
+wait_dnode4_offline_0:
+sql show dnodes
+if $rows != 3 then
+  sleep 2000
+  goto wait_dnode4_offline_0
+endi
+print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1
+print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2
+print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3
+#print $data0_4  $data1_4  $data2_4  $data3_4  $data4_4
+#print $data0_5  $data1_5  $data2_5  $data3_5  $data4_5
+#print $data0_6  $data1_6  $data2_6  $data3_6  $data4_6
+#$dnode1Status = $data4_1  
+$dnode2Status = $data4_2
+$dnode3Status = $data4_3  
+$dnode4Status = $data4_4 
+#$dnode5Status = $data4_5
+
+if $dnode4Status != offline then
+  sleep 2000
+  goto wait_dnode4_offline_0
+endi
+
+wait_dnode4_vgroup_offline:
+sql show vgroups
+if $rows != 1 then
+  sleep 2000
+  goto wait_dnode4_vgroup_offline
+endi
+print show vgroups:
+print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
+print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
+print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
+$dnode4Vtatus = $data4_2
+$dnode3Vtatus = $data7_2
+
+if $dnode4Vtatus != offline then
+  sleep 2000
+  goto wait_dnode4_vgroup_offline
+endi
+if $dnode3Vtatus != master then
+  sleep 2000
+  goto wait_dnode4_vgroup_offline
+endi
+
+print ============== step4: insert more data rows
+$tsStart = $tsEnd + 1000
+$i = 0
+while $i < $tblNum
+  $tb = tb . $i
+ 
+  $x = 0
+  while $x < $rowNum
+    $ts = $tsStart + $x
+    sql insert into $tb values ( $ts + 0a , $x ) ( $ts + 1a , $x ) ( $ts + 2a , $x ) ( $ts + 3a , $x ) ( $ts + 4a , $x ) ( $ts + 5a , $x ) ( $ts + 6a , $x ) ( $ts + 7a , $x ) ( $ts + 8a , $x ) ( $ts + 9a , $x ) ( $ts + 10a , $x ) ( $ts + 11a , $x ) ( $ts + 12a , $x ) ( $ts + 13a , $x ) ( $ts + 14a , $x ) ( $ts + 15a , $x ) ( $ts + 16a , $x ) ( $ts + 17a , $x ) ( $ts + 18a , $x ) ( $ts + 19a , $x ) ( $ts + 20a , $x ) ( $ts + 21a , $x ) ( $ts + 22a , $x ) ( $ts + 23a , $x ) ( $ts + 24a , $x ) ( $ts + 25a , $x ) ( $ts + 26a , $x ) ( $ts + 27a , $x ) ( $ts + 28a , $x ) ( $ts + 29a , $x ) ( $ts + 30a , $x ) ( $ts + 31a , $x ) ( $ts + 32a , $x ) ( $ts + 33a , $x ) ( $ts + 34a , $x ) ( $ts + 25a , $x ) ( $ts + 26a , $x ) ( $ts + 27a , $x ) ( $ts + 28a , $x ) ( $ts + 29a , $x ) ( $ts + 30a , $x ) ( $ts + 31a , $x ) ( $ts + 32a , $x ) ( $ts + 33a , $x ) ( $ts + 34a , $x ) ( $ts + 35a , $x ) ( $ts + 36a , $x ) ( $ts + 37a , $x ) ( $ts + 38a , $x ) ( $ts + 39a , $x ) ( $ts + 40a , $x ) ( $ts + 41a , $x ) ( $ts + 42a , $x ) ( $ts + 43a , $x ) ( $ts + 44a , $x ) ( $ts + 45a , $x ) ( $ts + 46a , $x ) ( $ts + 47a , $x ) ( $ts + 48a , $x ) ( $ts + 49a , $x ) ( $ts + 50a , $x ) ( $ts + 51a , $x ) ( $ts + 52a , $x ) ( $ts + 53a , $x ) ( $ts + 54a , $x ) ( $ts + 55a , $x ) ( $ts + 56a , $x ) ( $ts + 57a , $x ) ( $ts + 58a , $x ) ( $ts + 59a , $x ) 
+    $x = $x + 60
+  endw 
+  $totalRows = $totalRows + $x
+  print       info: inserted $x rows into $tb and totalRows: $totalRows
+  $i = $i + 1
+endw 
+
+sql select count(*) from $stb
+print data00 $data00
+if $data00 != $totalRows then
+	return -1
+endi
+
+print ============== step5: restart dnode4, while alter table and insert data in other thead when dnode4 is syncing
+system sh/exec.sh -n dnode4 -s start
+run_back unique/arbitrator/sync_replica_alterTable_background_add.sim
+
+print ============== step6: check result
+#in background.sim, add one column and insert 200 rows
+$totalRows = $totalRows + 200
+
+$cnt = 0
+wait_table_altered:
+$cnt = $cnt + 1
+if $cnt == 20 then
+  return -1
+endi
+sql select count(*) from $stb
+if $data00 != $totalRows then
+  print data00: $data00
+	sleep 2000
+	goto wait_table_altered
+endi
+
+
+
+
diff --git a/tests/script/unique/arbitrator/sync_replica2_alterTable_drop.sim b/tests/script/unique/arbitrator/sync_replica2_alterTable_drop.sim
new file mode 100644
index 0000000000000000000000000000000000000000..ecd8208281a1467595cd928d853384eb7ad86ac3
--- /dev/null
+++ b/tests/script/unique/arbitrator/sync_replica2_alterTable_drop.sim
@@ -0,0 +1,193 @@
+system sh/stop_dnodes.sh
+system sh/deploy.sh -n dnode1 -i 1
+system sh/deploy.sh -n dnode2 -i 2
+system sh/deploy.sh -n dnode3 -i 3
+system sh/deploy.sh -n dnode4 -i 4
+
+system sh/cfg.sh -n dnode1 -c numOfMnodes -v 1
+system sh/cfg.sh -n dnode2 -c numOfMnodes -v 1
+system sh/cfg.sh -n dnode3 -c numOfMnodes -v 1
+system sh/cfg.sh -n dnode4 -c numOfMnodes -v 1
+
+system sh/cfg.sh -n dnode1 -c walLevel -v 2
+system sh/cfg.sh -n dnode2 -c walLevel -v 2
+system sh/cfg.sh -n dnode3 -c walLevel -v 2
+system sh/cfg.sh -n dnode4 -c walLevel -v 2
+
+system sh/cfg.sh -n dnode1 -c balanceInterval -v 10
+system sh/cfg.sh -n dnode2 -c balanceInterval -v 10
+system sh/cfg.sh -n dnode3 -c balanceInterval -v 10
+system sh/cfg.sh -n dnode4 -c balanceInterval -v 10
+
+system sh/cfg.sh -n dnode1 -c numOfTotalVnodes -v 4
+system sh/cfg.sh -n dnode2 -c numOfTotalVnodes -v 4
+system sh/cfg.sh -n dnode3 -c numOfTotalVnodes -v 4
+system sh/cfg.sh -n dnode4 -c numOfTotalVnodes -v 4
+
+system sh/cfg.sh -n dnode1 -c alternativeRole -v 1
+system sh/cfg.sh -n dnode2 -c alternativeRole -v 2
+system sh/cfg.sh -n dnode3 -c alternativeRole -v 2
+system sh/cfg.sh -n dnode4 -c alternativeRole -v 2
+
+system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v 4
+system sh/cfg.sh -n dnode2 -c maxtablesPerVnode -v 4
+system sh/cfg.sh -n dnode3 -c maxtablesPerVnode -v 4
+system sh/cfg.sh -n dnode4 -c maxtablesPerVnode -v 4
+
+system sh/cfg.sh -n dnode1 -c arbitrator -v $arbitrator
+system sh/cfg.sh -n dnode2 -c arbitrator -v $arbitrator
+system sh/cfg.sh -n dnode3 -c arbitrator -v $arbitrator
+system sh/cfg.sh -n dnode4 -c arbitrator -v $arbitrator
+
+print ============== step0: start tarbitrator
+system sh/exec_tarbitrator.sh -s start
+
+print ============== step1: start dnode1, only deploy mnode
+system sh/exec.sh -n dnode1 -s start
+sleep 3000
+sql connect
+
+print ============== step2: start dnode2/dnode3/dnode4 and add into cluster , then create database with replica 3, and create table, insert data
+system sh/exec.sh -n dnode2 -s start
+#system sh/exec.sh -n dnode3 -s start
+system sh/exec.sh -n dnode4 -s start
+sql create dnode $hostname2
+#sql create dnode $hostname3
+sql create dnode $hostname4
+sleep 3000
+
+$totalTableNum = 100
+$sleepTimer = 3000
+
+$db = db
+print create database $db replica 3 maxTables $totalTableNum
+sql create database $db replica 3 maxTables $totalTableNum
+sql use $db
+
+# create table , insert data
+$stb = stb
+sql create table $stb (ts timestamp, c1 int) tags(t1 int)
+$rowNum = 500
+$tblNum = $totalTableNum
+$totalRows = 0
+$tsStart = 1420041600000
+$tsEnd = 0
+
+$i = 0
+while $i < $tblNum
+  $tb = tb . $i
+  sql create table $tb using $stb tags( $i )
+ 
+  $x = 0
+  while $x < $rowNum
+    $ts = $tsStart + $x
+    sql insert into $tb values ( $ts + 0a , $x ) ( $ts + 1a , $x ) ( $ts + 2a , $x ) ( $ts + 3a , $x ) ( $ts + 4a , $x ) ( $ts + 5a , $x ) ( $ts + 6a , $x ) ( $ts + 7a , $x ) ( $ts + 8a , $x ) ( $ts + 9a , $x ) ( $ts + 10a , $x ) ( $ts + 11a , $x ) ( $ts + 12a , $x ) ( $ts + 13a , $x ) ( $ts + 14a , $x ) ( $ts + 15a , $x ) ( $ts + 16a , $x ) ( $ts + 17a , $x ) ( $ts + 18a , $x ) ( $ts + 19a , $x ) ( $ts + 20a , $x ) ( $ts + 21a , $x ) ( $ts + 22a , $x ) ( $ts + 23a , $x ) ( $ts + 24a , $x ) ( $ts + 25a , $x ) ( $ts + 26a , $x ) ( $ts + 27a , $x ) ( $ts + 28a , $x ) ( $ts + 29a , $x ) ( $ts + 30a , $x ) ( $ts + 31a , $x ) ( $ts + 32a , $x ) ( $ts + 33a , $x ) ( $ts + 34a , $x ) ( $ts + 25a , $x ) ( $ts + 26a , $x ) ( $ts + 27a , $x ) ( $ts + 28a , $x ) ( $ts + 29a , $x ) ( $ts + 30a , $x ) ( $ts + 31a , $x ) ( $ts + 32a , $x ) ( $ts + 33a , $x ) ( $ts + 34a , $x ) ( $ts + 35a , $x ) ( $ts + 36a , $x ) ( $ts + 37a , $x ) ( $ts + 38a , $x ) ( $ts + 39a , $x ) ( $ts + 40a , $x ) ( $ts + 41a , $x ) ( $ts + 42a , $x ) ( $ts + 43a , $x ) ( $ts + 44a , $x ) ( $ts + 45a , $x ) ( $ts + 46a , $x ) ( $ts + 47a , $x ) ( $ts + 48a , $x ) ( $ts + 49a , $x ) ( $ts + 50a , $x ) ( $ts + 51a , $x ) ( $ts + 52a , $x ) ( $ts + 53a , $x ) ( $ts + 54a , $x ) ( $ts + 55a , $x ) ( $ts + 56a , $x ) ( $ts + 57a , $x ) ( $ts + 58a , $x ) ( $ts + 59a , $x ) 
+    $x = $x + 60
+  endw 
+  $totalRows = $totalRows + $x
+  print       info: inserted $x rows into $tb and totalRows: $totalRows
+  $i = $i + 1
+endw 
+$tsEnd = $tsStart + $totalRows / $tblNum
+
+sql select count(*) from $stb
+print data00 $data00
+if $data00 != $totalRows then
+	return -1
+endi
+
+print ============== step3: stop dnode4 
+system sh/exec.sh -n dnode4 -s stop -x SIGINT
+sleep $sleepTimer
+wait_dnode4_offline_0:
+sql show dnodes
+if $rows != 3 then
+  sleep 2000
+  goto wait_dnode4_offline_0
+endi
+print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1
+print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2
+print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3
+#print $data0_4  $data1_4  $data2_4  $data3_4  $data4_4
+#print $data0_5  $data1_5  $data2_5  $data3_5  $data4_5
+#print $data0_6  $data1_6  $data2_6  $data3_6  $data4_6
+#$dnode1Status = $data4_1  
+$dnode2Status = $data4_2
+$dnode3Status = $data4_3  
+$dnode4Status = $data4_4 
+#$dnode5Status = $data4_5
+
+if $dnode4Status != offline then
+  sleep 2000
+  goto wait_dnode4_offline_0
+endi
+
+wait_dnode4_vgroup_offline:
+sql show vgroups
+if $rows != 1 then
+  sleep 2000
+  goto wait_dnode4_vgroup_offline
+endi
+print show vgroups:
+print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
+print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
+print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
+$dnode4Vtatus = $data4_2
+$dnode3Vtatus = $data7_2
+
+if $dnode4Vtatus != offline then
+  sleep 2000
+  goto wait_dnode4_vgroup_offline
+endi
+if $dnode3Vtatus != master then
+  sleep 2000
+  goto wait_dnode4_vgroup_offline
+endi
+
+print ============== step4: insert more data rows
+$tsStart = $tsEnd + 1000
+$i = 0
+while $i < $tblNum
+  $tb = tb . $i
+ 
+  $x = 0
+  while $x < $rowNum
+    $ts = $tsStart + $x
+    sql insert into $tb values ( $ts + 0a , $x ) ( $ts + 1a , $x ) ( $ts + 2a , $x ) ( $ts + 3a , $x ) ( $ts + 4a , $x ) ( $ts + 5a , $x ) ( $ts + 6a , $x ) ( $ts + 7a , $x ) ( $ts + 8a , $x ) ( $ts + 9a , $x ) ( $ts + 10a , $x ) ( $ts + 11a , $x ) ( $ts + 12a , $x ) ( $ts + 13a , $x ) ( $ts + 14a , $x ) ( $ts + 15a , $x ) ( $ts + 16a , $x ) ( $ts + 17a , $x ) ( $ts + 18a , $x ) ( $ts + 19a , $x ) ( $ts + 20a , $x ) ( $ts + 21a , $x ) ( $ts + 22a , $x ) ( $ts + 23a , $x ) ( $ts + 24a , $x ) ( $ts + 25a , $x ) ( $ts + 26a , $x ) ( $ts + 27a , $x ) ( $ts + 28a , $x ) ( $ts + 29a , $x ) ( $ts + 30a , $x ) ( $ts + 31a , $x ) ( $ts + 32a , $x ) ( $ts + 33a , $x ) ( $ts + 34a , $x ) ( $ts + 25a , $x ) ( $ts + 26a , $x ) ( $ts + 27a , $x ) ( $ts + 28a , $x ) ( $ts + 29a , $x ) ( $ts + 30a , $x ) ( $ts + 31a , $x ) ( $ts + 32a , $x ) ( $ts + 33a , $x ) ( $ts + 34a , $x ) ( $ts + 35a , $x ) ( $ts + 36a , $x ) ( $ts + 37a , $x ) ( $ts + 38a , $x ) ( $ts + 39a , $x ) ( $ts + 40a , $x ) ( $ts + 41a , $x ) ( $ts + 42a , $x ) ( $ts + 43a , $x ) ( $ts + 44a , $x ) ( $ts + 45a , $x ) ( $ts + 46a , $x ) ( $ts + 47a , $x ) ( $ts + 48a , $x ) ( $ts + 49a , $x ) ( $ts + 50a , $x ) ( $ts + 51a , $x ) ( $ts + 52a , $x ) ( $ts + 53a , $x ) ( $ts + 54a , $x ) ( $ts + 55a , $x ) ( $ts + 56a , $x ) ( $ts + 57a , $x ) ( $ts + 58a , $x ) ( $ts + 59a , $x ) 
+    $x = $x + 60
+  endw 
+  $totalRows = $totalRows + $x
+  print       info: inserted $x rows into $tb and totalRows: $totalRows
+  $i = $i + 1
+endw 
+
+sql select count(*) from $stb
+print data00 $data00
+if $data00 != $totalRows then
+	return -1
+endi
+
+print ============== step5: restart dnode4, while alter table and insert data in other thead when dnode4 is syncing
+system sh/exec.sh -n dnode4 -s start
+run_back unique/arbitrator/sync_replica_alterTable_background_drop.sim
+
+print ============== step6: check result
+#in background.sim, drop one column and add one new column, then insert 200 rows
+$totalRows = $totalRows + 200
+
+$cnt = 0
+wait_table_altered:
+$cnt = $cnt + 1
+if $cnt == 20 then
+  return -1
+endi
+sql select count(*) from $stb
+if $data00 != $totalRows then
+  print data00: $data00
+	sleep 2000
+	goto wait_table_altered
+endi
+
+
+
+
diff --git a/tests/script/unique/arbitrator/sync_replica3_alterTable_add.sim b/tests/script/unique/arbitrator/sync_replica3_alterTable_add.sim
new file mode 100644
index 0000000000000000000000000000000000000000..d9dcea2b2212a468ac3465804e2553b4e2ddfe7c
--- /dev/null
+++ b/tests/script/unique/arbitrator/sync_replica3_alterTable_add.sim
@@ -0,0 +1,193 @@
+system sh/stop_dnodes.sh
+system sh/deploy.sh -n dnode1 -i 1
+system sh/deploy.sh -n dnode2 -i 2
+system sh/deploy.sh -n dnode3 -i 3
+system sh/deploy.sh -n dnode4 -i 4
+
+system sh/cfg.sh -n dnode1 -c numOfMnodes -v 1
+system sh/cfg.sh -n dnode2 -c numOfMnodes -v 1
+system sh/cfg.sh -n dnode3 -c numOfMnodes -v 1
+system sh/cfg.sh -n dnode4 -c numOfMnodes -v 1
+
+system sh/cfg.sh -n dnode1 -c walLevel -v 2
+system sh/cfg.sh -n dnode2 -c walLevel -v 2
+system sh/cfg.sh -n dnode3 -c walLevel -v 2
+system sh/cfg.sh -n dnode4 -c walLevel -v 2
+
+system sh/cfg.sh -n dnode1 -c balanceInterval -v 10
+system sh/cfg.sh -n dnode2 -c balanceInterval -v 10
+system sh/cfg.sh -n dnode3 -c balanceInterval -v 10
+system sh/cfg.sh -n dnode4 -c balanceInterval -v 10
+
+system sh/cfg.sh -n dnode1 -c numOfTotalVnodes -v 4
+system sh/cfg.sh -n dnode2 -c numOfTotalVnodes -v 4
+system sh/cfg.sh -n dnode3 -c numOfTotalVnodes -v 4
+system sh/cfg.sh -n dnode4 -c numOfTotalVnodes -v 4
+
+system sh/cfg.sh -n dnode1 -c alternativeRole -v 1
+system sh/cfg.sh -n dnode2 -c alternativeRole -v 2
+system sh/cfg.sh -n dnode3 -c alternativeRole -v 2
+system sh/cfg.sh -n dnode4 -c alternativeRole -v 2
+
+system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v 4
+system sh/cfg.sh -n dnode2 -c maxtablesPerVnode -v 4
+system sh/cfg.sh -n dnode3 -c maxtablesPerVnode -v 4
+system sh/cfg.sh -n dnode4 -c maxtablesPerVnode -v 4
+
+system sh/cfg.sh -n dnode1 -c arbitrator -v $arbitrator
+system sh/cfg.sh -n dnode2 -c arbitrator -v $arbitrator
+system sh/cfg.sh -n dnode3 -c arbitrator -v $arbitrator
+system sh/cfg.sh -n dnode4 -c arbitrator -v $arbitrator
+
+print ============== step0: start tarbitrator
+system sh/exec_tarbitrator.sh -s start
+
+print ============== step1: start dnode1, only deploy mnode
+system sh/exec.sh -n dnode1 -s start
+sleep 3000
+sql connect
+
+print ============== step2: start dnode2/dnode3/dnode4 and add into cluster , then create database with replica 3, and create table, insert data
+system sh/exec.sh -n dnode2 -s start
+system sh/exec.sh -n dnode3 -s start
+system sh/exec.sh -n dnode4 -s start
+sql create dnode $hostname2
+sql create dnode $hostname3
+sql create dnode $hostname4
+sleep 3000
+
+$totalTableNum = 100
+$sleepTimer = 3000
+
+$db = db
+print create database $db replica 3 maxTables $totalTableNum
+sql create database $db replica 3 maxTables $totalTableNum
+sql use $db
+
+# create table , insert data
+$stb = stb
+sql create table $stb (ts timestamp, c1 int) tags(t1 int)
+$rowNum = 500
+$tblNum = $totalTableNum
+$totalRows = 0
+$tsStart = 1420041600000
+$tsEnd = 0
+
+$i = 0
+while $i < $tblNum
+  $tb = tb . $i
+  sql create table $tb using $stb tags( $i )
+ 
+  $x = 0
+  while $x < $rowNum
+    $ts = $tsStart + $x
+    sql insert into $tb values ( $ts + 0a , $x ) ( $ts + 1a , $x ) ( $ts + 2a , $x ) ( $ts + 3a , $x ) ( $ts + 4a , $x ) ( $ts + 5a , $x ) ( $ts + 6a , $x ) ( $ts + 7a , $x ) ( $ts + 8a , $x ) ( $ts + 9a , $x ) ( $ts + 10a , $x ) ( $ts + 11a , $x ) ( $ts + 12a , $x ) ( $ts + 13a , $x ) ( $ts + 14a , $x ) ( $ts + 15a , $x ) ( $ts + 16a , $x ) ( $ts + 17a , $x ) ( $ts + 18a , $x ) ( $ts + 19a , $x ) ( $ts + 20a , $x ) ( $ts + 21a , $x ) ( $ts + 22a , $x ) ( $ts + 23a , $x ) ( $ts + 24a , $x ) ( $ts + 25a , $x ) ( $ts + 26a , $x ) ( $ts + 27a , $x ) ( $ts + 28a , $x ) ( $ts + 29a , $x ) ( $ts + 30a , $x ) ( $ts + 31a , $x ) ( $ts + 32a , $x ) ( $ts + 33a , $x ) ( $ts + 34a , $x ) ( $ts + 25a , $x ) ( $ts + 26a , $x ) ( $ts + 27a , $x ) ( $ts + 28a , $x ) ( $ts + 29a , $x ) ( $ts + 30a , $x ) ( $ts + 31a , $x ) ( $ts + 32a , $x ) ( $ts + 33a , $x ) ( $ts + 34a , $x ) ( $ts + 35a , $x ) ( $ts + 36a , $x ) ( $ts + 37a , $x ) ( $ts + 38a , $x ) ( $ts + 39a , $x ) ( $ts + 40a , $x ) ( $ts + 41a , $x ) ( $ts + 42a , $x ) ( $ts + 43a , $x ) ( $ts + 44a , $x ) ( $ts + 45a , $x ) ( $ts + 46a , $x ) ( $ts + 47a , $x ) ( $ts + 48a , $x ) ( $ts + 49a , $x ) ( $ts + 50a , $x ) ( $ts + 51a , $x ) ( $ts + 52a , $x ) ( $ts + 53a , $x ) ( $ts + 54a , $x ) ( $ts + 55a , $x ) ( $ts + 56a , $x ) ( $ts + 57a , $x ) ( $ts + 58a , $x ) ( $ts + 59a , $x ) 
+    $x = $x + 60
+  endw 
+  $totalRows = $totalRows + $x
+  print       info: inserted $x rows into $tb and totalRows: $totalRows
+  $i = $i + 1
+endw 
+$tsEnd = $tsStart + $totalRows / $tblNum
+
+sql select count(*) from $stb
+print data00 $data00
+if $data00 != $totalRows then
+	return -1
+endi
+
+print ============== step3: stop dnode4 
+system sh/exec.sh -n dnode4 -s stop -x SIGINT
+sleep $sleepTimer
+wait_dnode4_offline_0:
+sql show dnodes
+if $rows != 4 then
+  sleep 2000
+  goto wait_dnode4_offline_0
+endi
+print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1
+print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2
+print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3
+#print $data0_4  $data1_4  $data2_4  $data3_4  $data4_4
+#print $data0_5  $data1_5  $data2_5  $data3_5  $data4_5
+#print $data0_6  $data1_6  $data2_6  $data3_6  $data4_6
+#$dnode1Status = $data4_1  
+$dnode2Status = $data4_2
+$dnode3Status = $data4_3  
+$dnode4Status = $data4_4 
+#$dnode5Status = $data4_5
+
+if $dnode4Status != offline then
+  sleep 2000
+  goto wait_dnode4_offline_0
+endi
+
+wait_dnode4_vgroup_offline:
+sql show vgroups
+if $rows != 1 then
+  sleep 2000
+  goto wait_dnode4_vgroup_offline
+endi
+print show vgroups:
+print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
+print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
+print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
+$dnode4Vtatus = $data4_2
+$dnode3Vtatus = $data7_2
+
+if $dnode4Vtatus != offline then
+  sleep 2000
+  goto wait_dnode4_vgroup_offline
+endi
+if $dnode3Vtatus != master then
+  sleep 2000
+  goto wait_dnode4_vgroup_offline
+endi
+
+print ============== step4: insert more data rows
+$tsStart = $tsEnd + 1000
+$i = 0
+while $i < $tblNum
+  $tb = tb . $i
+ 
+  $x = 0
+  while $x < $rowNum
+    $ts = $tsStart + $x
+    sql insert into $tb values ( $ts + 0a , $x ) ( $ts + 1a , $x ) ( $ts + 2a , $x ) ( $ts + 3a , $x ) ( $ts + 4a , $x ) ( $ts + 5a , $x ) ( $ts + 6a , $x ) ( $ts + 7a , $x ) ( $ts + 8a , $x ) ( $ts + 9a , $x ) ( $ts + 10a , $x ) ( $ts + 11a , $x ) ( $ts + 12a , $x ) ( $ts + 13a , $x ) ( $ts + 14a , $x ) ( $ts + 15a , $x ) ( $ts + 16a , $x ) ( $ts + 17a , $x ) ( $ts + 18a , $x ) ( $ts + 19a , $x ) ( $ts + 20a , $x ) ( $ts + 21a , $x ) ( $ts + 22a , $x ) ( $ts + 23a , $x ) ( $ts + 24a , $x ) ( $ts + 25a , $x ) ( $ts + 26a , $x ) ( $ts + 27a , $x ) ( $ts + 28a , $x ) ( $ts + 29a , $x ) ( $ts + 30a , $x ) ( $ts + 31a , $x ) ( $ts + 32a , $x ) ( $ts + 33a , $x ) ( $ts + 34a , $x ) ( $ts + 25a , $x ) ( $ts + 26a , $x ) ( $ts + 27a , $x ) ( $ts + 28a , $x ) ( $ts + 29a , $x ) ( $ts + 30a , $x ) ( $ts + 31a , $x ) ( $ts + 32a , $x ) ( $ts + 33a , $x ) ( $ts + 34a , $x ) ( $ts + 35a , $x ) ( $ts + 36a , $x ) ( $ts + 37a , $x ) ( $ts + 38a , $x ) ( $ts + 39a , $x ) ( $ts + 40a , $x ) ( $ts + 41a , $x ) ( $ts + 42a , $x ) ( $ts + 43a , $x ) ( $ts + 44a , $x ) ( $ts + 45a , $x ) ( $ts + 46a , $x ) ( $ts + 47a , $x ) ( $ts + 48a , $x ) ( $ts + 49a , $x ) ( $ts + 50a , $x ) ( $ts + 51a , $x ) ( $ts + 52a , $x ) ( $ts + 53a , $x ) ( $ts + 54a , $x ) ( $ts + 55a , $x ) ( $ts + 56a , $x ) ( $ts + 57a , $x ) ( $ts + 58a , $x ) ( $ts + 59a , $x ) 
+    $x = $x + 60
+  endw 
+  $totalRows = $totalRows + $x
+  print       info: inserted $x rows into $tb and totalRows: $totalRows
+  $i = $i + 1
+endw 
+
+sql select count(*) from $stb
+print data00 $data00
+if $data00 != $totalRows then
+	return -1
+endi
+
+print ============== step5: restart dnode4, while alter table and insert data in other thead when dnode4 is syncing
+system sh/exec.sh -n dnode4 -s start
+run_back unique/arbitrator/sync_replica_alterTable_background_add.sim
+
+print ============== step6: check result
+#in background.sim, add one column and insert 200 rows
+$totalRows = $totalRows + 200
+
+$cnt = 0
+wait_table_altered:
+$cnt = $cnt + 1
+if $cnt == 20 then
+  return -1
+endi
+sql select count(*) from $stb
+if $data00 != $totalRows then
+  print data00: $data00 totalRows: $totalRows
+	sleep 2000
+	goto wait_table_altered
+endi
+
+
+
+
diff --git a/tests/script/unique/arbitrator/sync_replica3_alterTable_drop.sim b/tests/script/unique/arbitrator/sync_replica3_alterTable_drop.sim
new file mode 100644
index 0000000000000000000000000000000000000000..2c0a9f874796bd3911cfa7348364de9a6203e2a1
--- /dev/null
+++ b/tests/script/unique/arbitrator/sync_replica3_alterTable_drop.sim
@@ -0,0 +1,193 @@
+system sh/stop_dnodes.sh
+system sh/deploy.sh -n dnode1 -i 1
+system sh/deploy.sh -n dnode2 -i 2
+system sh/deploy.sh -n dnode3 -i 3
+system sh/deploy.sh -n dnode4 -i 4
+
+system sh/cfg.sh -n dnode1 -c numOfMnodes -v 1
+system sh/cfg.sh -n dnode2 -c numOfMnodes -v 1
+system sh/cfg.sh -n dnode3 -c numOfMnodes -v 1
+system sh/cfg.sh -n dnode4 -c numOfMnodes -v 1
+
+system sh/cfg.sh -n dnode1 -c walLevel -v 2
+system sh/cfg.sh -n dnode2 -c walLevel -v 2
+system sh/cfg.sh -n dnode3 -c walLevel -v 2
+system sh/cfg.sh -n dnode4 -c walLevel -v 2
+
+system sh/cfg.sh -n dnode1 -c balanceInterval -v 10
+system sh/cfg.sh -n dnode2 -c balanceInterval -v 10
+system sh/cfg.sh -n dnode3 -c balanceInterval -v 10
+system sh/cfg.sh -n dnode4 -c balanceInterval -v 10
+
+system sh/cfg.sh -n dnode1 -c numOfTotalVnodes -v 4
+system sh/cfg.sh -n dnode2 -c numOfTotalVnodes -v 4
+system sh/cfg.sh -n dnode3 -c numOfTotalVnodes -v 4
+system sh/cfg.sh -n dnode4 -c numOfTotalVnodes -v 4
+
+system sh/cfg.sh -n dnode1 -c alternativeRole -v 1
+system sh/cfg.sh -n dnode2 -c alternativeRole -v 2
+system sh/cfg.sh -n dnode3 -c alternativeRole -v 2
+system sh/cfg.sh -n dnode4 -c alternativeRole -v 2
+
+system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v 4
+system sh/cfg.sh -n dnode2 -c maxtablesPerVnode -v 4
+system sh/cfg.sh -n dnode3 -c maxtablesPerVnode -v 4
+system sh/cfg.sh -n dnode4 -c maxtablesPerVnode -v 4
+
+system sh/cfg.sh -n dnode1 -c arbitrator -v $arbitrator
+system sh/cfg.sh -n dnode2 -c arbitrator -v $arbitrator
+system sh/cfg.sh -n dnode3 -c arbitrator -v $arbitrator
+system sh/cfg.sh -n dnode4 -c arbitrator -v $arbitrator
+
+print ============== step0: start tarbitrator
+system sh/exec_tarbitrator.sh -s start
+
+print ============== step1: start dnode1, only deploy mnode
+system sh/exec.sh -n dnode1 -s start
+sleep 3000
+sql connect
+
+print ============== step2: start dnode2/dnode3/dnode4 and add into cluster , then create database with replica 3, and create table, insert data
+system sh/exec.sh -n dnode2 -s start
+system sh/exec.sh -n dnode3 -s start
+system sh/exec.sh -n dnode4 -s start
+sql create dnode $hostname2
+sql create dnode $hostname3
+sql create dnode $hostname4
+sleep 3000
+
+$totalTableNum = 100
+$sleepTimer = 3000
+
+$db = db
+print create database $db replica 3 maxTables $totalTableNum
+sql create database $db replica 3 maxTables $totalTableNum
+sql use $db
+
+# create table , insert data
+$stb = stb
+sql create table $stb (ts timestamp, c1 int) tags(t1 int)
+$rowNum = 500
+$tblNum = $totalTableNum
+$totalRows = 0
+$tsStart = 1420041600000
+$tsEnd = 0
+
+$i = 0
+while $i < $tblNum
+  $tb = tb . $i
+  sql create table $tb using $stb tags( $i )
+ 
+  $x = 0
+  while $x < $rowNum
+    $ts = $tsStart + $x
+    sql insert into $tb values ( $ts + 0a , $x ) ( $ts + 1a , $x ) ( $ts + 2a , $x ) ( $ts + 3a , $x ) ( $ts + 4a , $x ) ( $ts + 5a , $x ) ( $ts + 6a , $x ) ( $ts + 7a , $x ) ( $ts + 8a , $x ) ( $ts + 9a , $x ) ( $ts + 10a , $x ) ( $ts + 11a , $x ) ( $ts + 12a , $x ) ( $ts + 13a , $x ) ( $ts + 14a , $x ) ( $ts + 15a , $x ) ( $ts + 16a , $x ) ( $ts + 17a , $x ) ( $ts + 18a , $x ) ( $ts + 19a , $x ) ( $ts + 20a , $x ) ( $ts + 21a , $x ) ( $ts + 22a , $x ) ( $ts + 23a , $x ) ( $ts + 24a , $x ) ( $ts + 25a , $x ) ( $ts + 26a , $x ) ( $ts + 27a , $x ) ( $ts + 28a , $x ) ( $ts + 29a , $x ) ( $ts + 30a , $x ) ( $ts + 31a , $x ) ( $ts + 32a , $x ) ( $ts + 33a , $x ) ( $ts + 34a , $x ) ( $ts + 25a , $x ) ( $ts + 26a , $x ) ( $ts + 27a , $x ) ( $ts + 28a , $x ) ( $ts + 29a , $x ) ( $ts + 30a , $x ) ( $ts + 31a , $x ) ( $ts + 32a , $x ) ( $ts + 33a , $x ) ( $ts + 34a , $x ) ( $ts + 35a , $x ) ( $ts + 36a , $x ) ( $ts + 37a , $x ) ( $ts + 38a , $x ) ( $ts + 39a , $x ) ( $ts + 40a , $x ) ( $ts + 41a , $x ) ( $ts + 42a , $x ) ( $ts + 43a , $x ) ( $ts + 44a , $x ) ( $ts + 45a , $x ) ( $ts + 46a , $x ) ( $ts + 47a , $x ) ( $ts + 48a , $x ) ( $ts + 49a , $x ) ( $ts + 50a , $x ) ( $ts + 51a , $x ) ( $ts + 52a , $x ) ( $ts + 53a , $x ) ( $ts + 54a , $x ) ( $ts + 55a , $x ) ( $ts + 56a , $x ) ( $ts + 57a , $x ) ( $ts + 58a , $x ) ( $ts + 59a , $x ) 
+    $x = $x + 60
+  endw 
+  $totalRows = $totalRows + $x
+  print       info: inserted $x rows into $tb and totalRows: $totalRows
+  $i = $i + 1
+endw 
+$tsEnd = $tsStart + $totalRows / $tblNum
+
+sql select count(*) from $stb
+print data00 $data00
+if $data00 != $totalRows then
+	return -1
+endi
+
+print ============== step3: stop dnode4 
+system sh/exec.sh -n dnode4 -s stop -x SIGINT
+sleep $sleepTimer
+wait_dnode4_offline_0:
+sql show dnodes
+if $rows != 4 then
+  sleep 2000
+  goto wait_dnode4_offline_0
+endi
+print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1
+print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2
+print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3
+#print $data0_4  $data1_4  $data2_4  $data3_4  $data4_4
+#print $data0_5  $data1_5  $data2_5  $data3_5  $data4_5
+#print $data0_6  $data1_6  $data2_6  $data3_6  $data4_6
+#$dnode1Status = $data4_1  
+$dnode2Status = $data4_2
+$dnode3Status = $data4_3  
+$dnode4Status = $data4_4 
+#$dnode5Status = $data4_5
+
+if $dnode4Status != offline then
+  sleep 2000
+  goto wait_dnode4_offline_0
+endi
+
+wait_dnode4_vgroup_offline:
+sql show vgroups
+if $rows != 1 then
+  sleep 2000
+  goto wait_dnode4_vgroup_offline
+endi
+print show vgroups:
+print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
+print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
+print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
+$dnode4Vtatus = $data4_2
+$dnode3Vtatus = $data7_2
+
+if $dnode4Vtatus != offline then
+  sleep 2000
+  goto wait_dnode4_vgroup_offline
+endi
+if $dnode3Vtatus != master then
+  sleep 2000
+  goto wait_dnode4_vgroup_offline
+endi
+
+print ============== step4: insert more data rows
+$tsStart = $tsEnd + 1000
+$i = 0
+while $i < $tblNum
+  $tb = tb . $i
+ 
+  $x = 0
+  while $x < $rowNum
+    $ts = $tsStart + $x
+    sql insert into $tb values ( $ts + 0a , $x ) ( $ts + 1a , $x ) ( $ts + 2a , $x ) ( $ts + 3a , $x ) ( $ts + 4a , $x ) ( $ts + 5a , $x ) ( $ts + 6a , $x ) ( $ts + 7a , $x ) ( $ts + 8a , $x ) ( $ts + 9a , $x ) ( $ts + 10a , $x ) ( $ts + 11a , $x ) ( $ts + 12a , $x ) ( $ts + 13a , $x ) ( $ts + 14a , $x ) ( $ts + 15a , $x ) ( $ts + 16a , $x ) ( $ts + 17a , $x ) ( $ts + 18a , $x ) ( $ts + 19a , $x ) ( $ts + 20a , $x ) ( $ts + 21a , $x ) ( $ts + 22a , $x ) ( $ts + 23a , $x ) ( $ts + 24a , $x ) ( $ts + 25a , $x ) ( $ts + 26a , $x ) ( $ts + 27a , $x ) ( $ts + 28a , $x ) ( $ts + 29a , $x ) ( $ts + 30a , $x ) ( $ts + 31a , $x ) ( $ts + 32a , $x ) ( $ts + 33a , $x ) ( $ts + 34a , $x ) ( $ts + 25a , $x ) ( $ts + 26a , $x ) ( $ts + 27a , $x ) ( $ts + 28a , $x ) ( $ts + 29a , $x ) ( $ts + 30a , $x ) ( $ts + 31a , $x ) ( $ts + 32a , $x ) ( $ts + 33a , $x ) ( $ts + 34a , $x ) ( $ts + 35a , $x ) ( $ts + 36a , $x ) ( $ts + 37a , $x ) ( $ts + 38a , $x ) ( $ts + 39a , $x ) ( $ts + 40a , $x ) ( $ts + 41a , $x ) ( $ts + 42a , $x ) ( $ts + 43a , $x ) ( $ts + 44a , $x ) ( $ts + 45a , $x ) ( $ts + 46a , $x ) ( $ts + 47a , $x ) ( $ts + 48a , $x ) ( $ts + 49a , $x ) ( $ts + 50a , $x ) ( $ts + 51a , $x ) ( $ts + 52a , $x ) ( $ts + 53a , $x ) ( $ts + 54a , $x ) ( $ts + 55a , $x ) ( $ts + 56a , $x ) ( $ts + 57a , $x ) ( $ts + 58a , $x ) ( $ts + 59a , $x ) 
+    $x = $x + 60
+  endw 
+  $totalRows = $totalRows + $x
+  print       info: inserted $x rows into $tb and totalRows: $totalRows
+  $i = $i + 1
+endw 
+
+sql select count(*) from $stb
+print data00 $data00
+if $data00 != $totalRows then
+	return -1
+endi
+
+print ============== step5: restart dnode4, while alter table and insert data in other thead when dnode4 is syncing
+system sh/exec.sh -n dnode4 -s start
+run_back unique/arbitrator/sync_replica_alterTable_background_drop.sim
+
+print ============== step6: check result
+#in background.sim, drop one column and add one new column, then insert 200 rows
+$totalRows = $totalRows + 200
+
+$cnt = 0
+wait_table_altered:
+$cnt = $cnt + 1
+if $cnt == 20 then
+  return -1
+endi
+sql select count(*) from $stb
+if $data00 != $totalRows then
+  print data00: $data00
+	sleep 2000
+	goto wait_table_altered
+endi
+
+
+
+
diff --git a/tests/script/unique/arbitrator/sync_replica_alterTable_background_add.sim b/tests/script/unique/arbitrator/sync_replica_alterTable_background_add.sim
new file mode 100644
index 0000000000000000000000000000000000000000..c5f9157e268b64a5e078b24d2843bec130de94d3
--- /dev/null
+++ b/tests/script/unique/arbitrator/sync_replica_alterTable_background_add.sim
@@ -0,0 +1,25 @@
+sql connect
+
+$db = db
+$stb = stb
+print =============== sync_replica_alterTable_background_add.sim step0: alter table and insert data
+$totalTableNum = 100
+
+sql use $db
+
+#sql create table $stb (ts timestamp, c1 int) tags(t1 int)
+print alter table $stb add column f1 float
+sql alter table $stb add column f1 float
+
+$tblNum = $totalTableNum
+$alterTblNum = 51
+
+$i = 1
+while $i < $alterTblNum
+  $tb = tb . $i
+  sql insert into $tb values (now, 10001, 10001) (now + 1s, 10002, 10002) (now + 2s, 10003, 10003) (now + 3s, 10004, 10004)
+  $i = $i + 1
+endw 
+
+
+
diff --git a/tests/script/unique/arbitrator/sync_replica_alterTable_background_drop.sim b/tests/script/unique/arbitrator/sync_replica_alterTable_background_drop.sim
new file mode 100644
index 0000000000000000000000000000000000000000..5540eb96dfbe48b745bb9f728a31aa3d4068cd35
--- /dev/null
+++ b/tests/script/unique/arbitrator/sync_replica_alterTable_background_drop.sim
@@ -0,0 +1,25 @@
+sql connect
+
+$db = db
+$stb = stb
+print =============== sync_replica_alterTable_background_drop.sim step0: alter table and insert data
+$totalTableNum = 100
+
+sql use $db
+
+#sql create table $stb (ts timestamp, c1 int) tags(t1 int)
+sql alter table $stb drop column c1
+sql alter table $stb add column f1 double
+
+$tblNum = $totalTableNum
+$alterTblNum = 51
+
+$i = 1
+while $i < $alterTblNum
+  $tb = tb . $i
+  sql insert into $tb values (now, 10001) (now + 1s, 10002) (now + 2s, 10003) (now + 3s, 10004)
+  $i = $i + 1
+endw 
+
+
+
diff --git a/tests/script/unique/big/balance.sim b/tests/script/unique/big/balance.sim
index 09fca14931a74d2da342ffbd6bc4f25951230e20..b2a15b0b9637c5f6a7af492b12b4dc4621ca2014 100644
--- a/tests/script/unique/big/balance.sim
+++ b/tests/script/unique/big/balance.sim
@@ -171,6 +171,7 @@ if $data2_3 != 2 then
 endi
 
 system sh/exec.sh -n dnode2 -s stop -x SIGINT
+sleep 5000
 
 sql reset query cache
 sleep 1000
@@ -227,6 +228,7 @@ if $data2_3 != null then
 endi
 
 system sh/exec.sh -n dnode3 -s stop -x SIGINT
+sleep 5000
 
 sql reset query cache
 sleep 1000
diff --git a/tests/script/unique/cluster/balance1.sim b/tests/script/unique/cluster/balance1.sim
index 80dfd81e343a8bf637fde037c43921da5ac10959..c402c111cfdd69bdb61998e4acd214526eb30463 100644
--- a/tests/script/unique/cluster/balance1.sim
+++ b/tests/script/unique/cluster/balance1.sim
@@ -163,7 +163,7 @@ print dnode4 ==> $dnode4Role
 print ============================== step5
 print ========= add dnode2
 system sh/exec.sh -n dnode2 -s stop -x SIGINT
-sleep 3000
+sleep 5000
 system sh/exec.sh -n dnode3 -s start
 sql create dnode $hostname3
 sleep 9000
diff --git a/tests/script/unique/cluster/balance3.sim b/tests/script/unique/cluster/balance3.sim
index 77eba2a2a50cf44c157584a0560e428e0aea72cc..8920ec9fc15a3191232a31164dc3d1c4f67d1808 100644
--- a/tests/script/unique/cluster/balance3.sim
+++ b/tests/script/unique/cluster/balance3.sim
@@ -381,6 +381,7 @@ if $dnode7Vnodes != 3 then
 endi
 
 system sh/exec.sh -n dnode1 -s stop -x SIGINT
+sleep 5000
 
 print ============================== step11
 print ========= add db4
@@ -429,6 +430,7 @@ if $dnode7Vnodes != 4 then
 endi
 
 system sh/exec.sh -n dnode1 -s stop  -x SIGINT
+sleep 5000
 
 print ============================== step13
 sql reset query cache
diff --git a/tests/script/unique/db/commit.sim b/tests/script/unique/db/commit.sim
index 98256b01dc71e1a4fef1fe6016a91c2a949355e6..caff3c6a7898090b307d487ccdf2b8ac0dd7a1f3 100644
--- a/tests/script/unique/db/commit.sim
+++ b/tests/script/unique/db/commit.sim
@@ -50,7 +50,7 @@ print ======== step2 stop dnode
 system sh/exec.sh -n dnode2 -s stop -x SIGINT
 sleep 5000
 system sh/exec.sh -n dnode2 -s start
-sleep 3000
+sleep 5000
 
 sql select * from tb order by ts desc
 print ===> rows $rows
@@ -101,7 +101,7 @@ print ======== step5 stop dnode
 system sh/exec.sh -n dnode2 -s stop -x SIGINT
 sleep 5000
 system sh/exec.sh -n dnode2 -s start
-sleep 3000
+sleep 5000
 
 sql select * from tb
 print ===> rows $rows
diff --git a/tests/script/unique/db/delete.sim b/tests/script/unique/db/delete.sim
index d9b6e8a9f9b40926a7eb26402139a4f7632a4202..819da67c8afe6ae55d2981e18ff379c9322b89f6 100644
--- a/tests/script/unique/db/delete.sim
+++ b/tests/script/unique/db/delete.sim
@@ -69,7 +69,7 @@ system sh/exec.sh -n dnode1 -s stop  -x SIGINT
 system sh/exec.sh -n dnode2 -s stop  -x SIGINT
 system sh/exec.sh -n dnode3 -s stop  -x SIGINT
 
-sleep 1000
+sleep 5000
 system sh/exec.sh -n dnode1 -s start
 system sh/exec.sh -n dnode2 -s start
 system sh/exec.sh -n dnode3 -s start
diff --git a/tests/script/unique/db/replica_add13.sim b/tests/script/unique/db/replica_add13.sim
index 1b5a01a9fd99b579810c48303352541ff2d5e045..9cc1545bfa2c3da96ae15e78a559571e0ae623e4 100644
--- a/tests/script/unique/db/replica_add13.sim
+++ b/tests/script/unique/db/replica_add13.sim
@@ -171,7 +171,7 @@ print ========= step6
 system sh/exec.sh -n dnode2 -s start
 sleep 5000
 system sh/exec.sh -n dnode3 -s stop -x SIGINT
-sleep 3000
+sleep 5000
 
 sql insert into d1.t1 values(1589529000014, 4)
 sql insert into d2.t2 values(1589529000024, 4)
@@ -206,7 +206,7 @@ print ========= step7
 system sh/exec.sh -n dnode3 -s start
 sleep 5000
 system sh/exec.sh -n dnode4 -s stop -x SIGINT
-sleep 3000
+sleep 5000
 
 sql insert into d1.t1 values(1589529000015, 5)
 sql insert into d2.t2 values(1589529000025, 5)
@@ -237,7 +237,7 @@ print ========= step8
 system sh/exec.sh -n dnode4 -s start
 sleep 5000
 system sh/exec.sh -n dnode2 -s stop -x SIGINT
-sleep 3000
+sleep 5000
 
 sql insert into d1.t1 values(1589529000016, 6)
 sql insert into d2.t2 values(1589529000026, 6)
diff --git a/tests/script/unique/db/replica_reduce21.sim b/tests/script/unique/db/replica_reduce21.sim
index 9dc5abcd0df179dc4089a6d425d10d8a8a633eb7..a61cb84c11598f8ecf738d3c8e7d7abc5ff66742 100644
--- a/tests/script/unique/db/replica_reduce21.sim
+++ b/tests/script/unique/db/replica_reduce21.sim
@@ -118,7 +118,7 @@ endi
 
 print ======== step9 stop dnode2
 system sh/exec.sh -n dnode2 -s stop -x SIGINT
-sleep 3000
+sleep 5000
 
 sql insert into d5.t5 values(now, 3)
 sql insert into d2.t2 values(now, 3)
diff --git a/tests/script/unique/dnode/balance2.sim b/tests/script/unique/dnode/balance2.sim
index 374e3dd5ba4539345dd356cc047a0fbd0a9afa14..e23562d8b47c122ccba442d0c053a6887f550060 100644
--- a/tests/script/unique/dnode/balance2.sim
+++ b/tests/script/unique/dnode/balance2.sim
@@ -84,6 +84,7 @@ if $data2_3 != 2 then
 endi
 
 system sh/exec.sh -n dnode2 -s stop -x SIGINT
+sleep 5000
 
 print ========== step3
 sql create dnode $hostname4
@@ -210,6 +211,7 @@ if $data2_5 != 3 then
 endi
 
 system sh/exec.sh -n dnode2 -s stop -x SIGINT
+sleep 5000
 
 sql reset query cache
 sleep 1000
diff --git a/tests/script/unique/dnode/balance3.sim b/tests/script/unique/dnode/balance3.sim
index 786b4404ba0da917fbc278d529c33fcce8c75112..a09fd7e4ea99a3ac0ed0fee159111c3b8e1d98b1 100644
--- a/tests/script/unique/dnode/balance3.sim
+++ b/tests/script/unique/dnode/balance3.sim
@@ -99,7 +99,7 @@ if $data2_4 != 2 then
 endi
 
 system sh/exec.sh -n dnode2 -s stop -x SIGINT
-
+sleep 5000
 print ========== step
 sql create dnode $hostname5
 system sh/exec.sh -n dnode5 -s start
@@ -239,6 +239,7 @@ if $data2_5 != 3 then
 endi
 
 system sh/exec.sh -n dnode3 -s stop -x SIGINT
+sleep 5000
 
 sql reset query cache
 sleep 1000
diff --git a/tests/script/unique/dnode/balancex.sim b/tests/script/unique/dnode/balancex.sim
index fdb20434ffe542831b43adadfb5bc05605ba029c..0d5da5bbf647c8ebf798745b77e3c15650254718 100644
--- a/tests/script/unique/dnode/balancex.sim
+++ b/tests/script/unique/dnode/balancex.sim
@@ -140,6 +140,7 @@ if $data2_3 != 3 then
 endi
 
 system sh/exec.sh -n dnode2 -s stop -x SIGINT
+sleep 5000
 
 sql reset query cache
 sleep 1000
diff --git a/tests/script/unique/dnode/remove1.sim b/tests/script/unique/dnode/remove1.sim
index 5c4d30e728ddb1bfc50dc437d9378b3f79555c5b..246808c56cba9527a061e3252b397290bfee88f2 100644
--- a/tests/script/unique/dnode/remove1.sim
+++ b/tests/script/unique/dnode/remove1.sim
@@ -110,6 +110,7 @@ if $data2_2 != null then
 endi
 
 system sh/exec.sh -n dnode2 -s stop -x SIGINT
+sleep 5000
 
 print ========== step5
 sql create dnode $hostname4
diff --git a/tests/script/unique/dnode/remove2.sim b/tests/script/unique/dnode/remove2.sim
index 76c5fbb08e34e516e4ea050fee2c2a7f140096cb..cf9954c7672099ad97253ca326e05f5bca4d54a5 100644
--- a/tests/script/unique/dnode/remove2.sim
+++ b/tests/script/unique/dnode/remove2.sim
@@ -76,7 +76,7 @@ endi
 print ========== step3
 system sh/exec.sh -n dnode2 -s stop -x SIGINT
 sql drop dnode $hostname2
-sleep 4000
+sleep 5000
 
 sql show dnodes
 print dnode1 openVnodes $data2_1
diff --git a/tests/script/unique/dnode/vnode_clean.sim b/tests/script/unique/dnode/vnode_clean.sim
index 6ab63bd94f270aa7cdc878b5b5dff0daa376ac8e..e1ee1da2aa7c7291dccc3e674a6eae50165fa358 100644
--- a/tests/script/unique/dnode/vnode_clean.sim
+++ b/tests/script/unique/dnode/vnode_clean.sim
@@ -101,7 +101,7 @@ endi
 system sh/exec.sh -n dnode2 -s stop -x SIGINT
 
 print ========== step5
-sleep 2000
+sleep 5000
 sql create dnode $hostname3
 system sh/exec.sh -n dnode3 -s start
 
@@ -222,7 +222,8 @@ if $data2_4 != 4 then
   goto show9
 endi
 
-system sh/exec.sh -n dnode3 -s stop -x SIGINT
+system sh/exec.sh -n dnode3 -s stop 
+sleep 5000
 
 print ========== step10
 sql select * from d1.t1  order by t desc
diff --git a/tests/script/unique/mnode/mgmt22.sim b/tests/script/unique/mnode/mgmt22.sim
index 08fe8d346a8d57006b552727d14292b4d559777d..d55e36d7fc627c3dcfb3e9c21c9396960a0c9287 100644
--- a/tests/script/unique/mnode/mgmt22.sim
+++ b/tests/script/unique/mnode/mgmt22.sim
@@ -47,7 +47,7 @@ print should not drop master
 
 print ============== step4
 system sh/exec.sh -n dnode1 -s stop -x SIGINT
-sleep 2000
+sleep 5000
 sql_error show mnodes
 print error of no master
 
diff --git a/tests/script/windows/alter/metrics.sim b/tests/script/windows/alter/metrics.sim
index ce003a98363488f1be2969104420c59a10628a1f..323e150d41410c780680bf41b7e8c7f2c5aaee66 100644
--- a/tests/script/windows/alter/metrics.sim
+++ b/tests/script/windows/alter/metrics.sim
@@ -368,9 +368,9 @@ endi
 print ======== step9
 print ======== step10
 system sh/exec.sh -n dnode1 -s stop -x SIGINT
-sleep 3000
+sleep 5000
 system sh/exec.sh -n dnode1 -s start
-sleep 3000
+sleep 5000
 
 sql use d2
 sql describe tb
diff --git a/tests/script/windows/alter/table.sim b/tests/script/windows/alter/table.sim
index 155debda0de7f5617d33fc20146c578dae344ebb..e6b5d695510cf66ee4accc0a329fe44597f1cdce 100644
--- a/tests/script/windows/alter/table.sim
+++ b/tests/script/windows/alter/table.sim
@@ -319,9 +319,9 @@ endi
 print ======== step9
 print ======== step10
 system sh/exec.sh -n dnode1 -s stop -x SIGINT
-sleep 3000
+sleep 5000
 system sh/exec.sh -n dnode1 -s start
-sleep 3000
+sleep 5000
 
 sql use d1
 sql describe tb
diff --git a/tests/test-all.sh b/tests/test-all.sh
index cee638e03c9996d15201928e076f2d2d400a612c..485c852dc50782e80f9263f5df7e9bad3deab6a5 100755
--- a/tests/test-all.sh
+++ b/tests/test-all.sh
@@ -24,65 +24,74 @@ GREEN_DARK='\033[0;32m'
 GREEN_UNDERLINE='\033[4;32m'
 NC='\033[0m'
 
-echo "### run TSIM test case ###"
-cd script
-
-[ -f out.log ] && rm -f out.log
-
-if [ "$1" == "cron" ]; then
-  echo "### run TSIM regression test ###"
-  runSimCaseOneByOne regressionSuite.sim
-elif [ "$1" == "full" ]; then
-  echo "### run TSIM full test ###"
-  runSimCaseOneByOne fullGeneralSuite.sim
-else
-  echo "### run TSIM smoke test ###"
-  runSimCaseOneByOne basicSuite.sim
-fi
+totalFailed=0
+totalPyFailed=0
 
-totalSuccess=`grep 'success' out.log | wc -l`
-totalBasic=`grep success out.log | grep Suite | wc -l`
 
-if [ "$totalSuccess" -gt "0" ]; then
-  totalSuccess=`expr $totalSuccess - $totalBasic`
-fi
+current_dir=`pwd`
 
-echo -e "${GREEN} ### Total $totalSuccess TSIM case(s) succeed! ### ${NC}"
+if [ "$2" != "python" ]; then
+  echo "### run TSIM test case ###"
+  cd $current_dir/script
 
-totalFailed=`grep 'failed\|fault' out.log | wc -l`
-# echo -e "${RED} ### Total $totalFailed TSIM case(s) failed! ### ${NC}"
+  [ -f out.log ] && rm -f out.log
+  if [ "$1" == "cron" ]; then
+    echo "### run TSIM regression test ###"
+    runSimCaseOneByOne regressionSuite.sim
+  elif [ "$1" == "full" ]; then
+    echo "### run TSIM full test ###"
+    runSimCaseOneByOne fullGeneralSuite.sim
+  else
+    echo "### run TSIM smoke test ###"
+    runSimCaseOneByOne basicSuite.sim
+  fi
 
-if [ "$totalFailed" -ne "0" ]; then
-  echo -e "${RED} ### Total $totalFailed TSIM case(s) failed! ### ${NC}"
+  totalSuccess=`grep 'success' out.log | wc -l`
+  totalBasic=`grep success out.log | grep Suite | wc -l`
 
-#  exit $totalFailed
-fi
+  if [ "$totalSuccess" -gt "0" ]; then
+    totalSuccess=`expr $totalSuccess - $totalBasic`
+  fi
 
-echo "### run Python test case ###"
-cd ../pytest
+  echo -e "${GREEN} ### Total $totalSuccess TSIM case(s) succeed! ### ${NC}"
 
-[ -f pytest-out.log ] && rm -f pytest-out.log
+  totalFailed=`grep 'failed\|fault' out.log | wc -l`
+# echo -e "${RED} ### Total $totalFailed TSIM case(s) failed! ### ${NC}"
 
-if [ "$1" == "cron" ]; then
-  echo "### run Python regression test ###"
-  runPyCaseOneByOne regressiontest.sh
-elif [ "$1" == "full" ]; then
-  echo "### run Python full test ###"
-  runPyCaseOneByOne fulltest.sh
-else
-  echo "### run Python smoke test ###"
-  runPyCaseOneByOne smoketest.sh
-fi
-totalPySuccess=`grep 'successfully executed' pytest-out.log | wc -l`
+  if [ "$totalFailed" -ne "0" ]; then
+    echo -e "${RED} ### Total $totalFailed TSIM case(s) failed! ### ${NC}"
 
-if [ "$totalPySuccess" -gt "0" ]; then
-  echo -e "${GREEN} ### Total $totalPySuccess python case(s) succeed! ### ${NC}"
+#  exit $totalFailed
+  fi
 fi
 
-totalPyFailed=`grep 'failed\|fault' pytest-out.log | wc -l`
-if [ "$totalPyFailed" -ne "0" ]; then
-  echo -e "${RED} ### Total $totalPyFailed python case(s) failed! ### ${NC}"
+if [ "$2" != "sim" ]; then
+  echo "### run Python test case ###"
+  cd $current_dir/pytest
+
+  [ -f pytest-out.log ] && rm -f pytest-out.log
+
+  if [ "$1" == "cron" ]; then
+    echo "### run Python regression test ###"
+    runPyCaseOneByOne regressiontest.sh
+  elif [ "$1" == "full" ]; then
+    echo "### run Python full test ###"
+    runPyCaseOneByOne fulltest.sh
+  else
+    echo "### run Python smoke test ###"
+    runPyCaseOneByOne smoketest.sh
+  fi
+  totalPySuccess=`grep 'successfully executed' pytest-out.log | wc -l`
+
+  if [ "$totalPySuccess" -gt "0" ]; then
+    echo -e "${GREEN} ### Total $totalPySuccess python case(s) succeed! ### ${NC}"
+  fi
+
+  totalPyFailed=`grep 'failed\|fault' pytest-out.log | wc -l`
+  if [ "$totalPyFailed" -ne "0" ]; then
+    echo -e "${RED} ### Total $totalPyFailed python case(s) failed! ### ${NC}"
 #  exit $totalPyFailed
+  fi
 fi
 
 exit $(($totalFailed + $totalPyFailed))