diff --git a/include/common/tmsg.h b/include/common/tmsg.h
index e0dcfbd54442854c991f03510b1e7ba78fc9032b..ee858ad506c91650ad3a7dc0bd3da8f6ad44b81a 100644
--- a/include/common/tmsg.h
+++ b/include/common/tmsg.h
@@ -241,6 +241,7 @@ typedef struct {
   int32_t schemaLen;  // schema length, if length is 0, no schema exists
   int16_t numOfRows;  // total number of rows in current submit block
   // head of SSubmitBlk
+  int32_t     numOfBlocks;
   const void* pMsg;
 } SSubmitMsgIter;
 
diff --git a/source/common/src/tmsg.c b/source/common/src/tmsg.c
index 9c6c532bcd071bf8799e28076a9ea147d5b81443..e7ee164be725465a0368e39d2f7dcfc9a24eb5d9 100644
--- a/source/common/src/tmsg.c
+++ b/source/common/src/tmsg.c
@@ -35,6 +35,7 @@ int32_t tInitSubmitMsgIter(const SSubmitReq *pMsg, SSubmitMsgIter *pIter) {
   }
 
   pIter->totalLen = htonl(pMsg->length);
+  pIter->numOfBlocks = htonl(pMsg->numOfBlocks);
   ASSERT(pIter->totalLen > 0);
   pIter->len = 0;
   pIter->pMsg = pMsg;
diff --git a/source/dnode/mnode/impl/src/mndDb.c b/source/dnode/mnode/impl/src/mndDb.c
index 6d7a638c30818d64e436f2de989c7d2fe1d7b9c5..a2a925b0bd23ce62fc95114a7439091a47d90797 100644
--- a/source/dnode/mnode/impl/src/mndDb.c
+++ b/source/dnode/mnode/impl/src/mndDb.c
@@ -1344,6 +1344,9 @@ int32_t mndValidateDbInfo(SMnode *pMnode, SDbVgVersion *pDbs, int32_t numOfDbs,
       mDebug("db:%s, version & numOfTable not changed", pDbVgVersion->dbFName);
       mndReleaseDb(pMnode, pDb);
       continue;
+    } else {
+      mDebug("db:%s, vgroup version changed from %d to %d", pDbVgVersion->dbFName, pDbVgVersion->vgVersion,
+             pDb->vgVersion);
     }
 
     usedbRsp.pVgroupInfos = taosArrayInit(pDb->cfg.numOfVgroups, sizeof(SVgroupInfo));
diff --git a/source/dnode/vnode/src/vnd/vnodeSvr.c b/source/dnode/vnode/src/vnd/vnodeSvr.c
index 47eaf2d5a5e270cabbb33290682bd9c7f096b5c3..4b0016a746ac04d36b8c87576f11af561bba5203 100644
--- a/source/dnode/vnode/src/vnd/vnodeSvr.c
+++ b/source/dnode/vnode/src/vnd/vnodeSvr.c
@@ -715,8 +715,8 @@ static int vnodeProcessSubmitReq(SVnode *pVnode, int64_t version, void *pReq, in
     goto _exit;
   }
 
-  submitRsp.pArray = taosArrayInit(pSubmitReq->numOfBlocks, sizeof(SSubmitBlkRsp));
-  newTbUids = taosArrayInit(pSubmitReq->numOfBlocks, sizeof(int64_t));
+  submitRsp.pArray = taosArrayInit(msgIter.numOfBlocks, sizeof(SSubmitBlkRsp));
+  newTbUids = taosArrayInit(msgIter.numOfBlocks, sizeof(int64_t));
   if (!submitRsp.pArray) {
     pRsp->code = TSDB_CODE_OUT_OF_MEMORY;
     goto _exit;
diff --git a/tests/script/jenkins/basic.txt b/tests/script/jenkins/basic.txt
index c93374956483d94550d614d7c99c77bba4bf1dd0..32056e8d0ceb2d128b25b86e24ce9d42dfa6ba15 100644
--- a/tests/script/jenkins/basic.txt
+++ b/tests/script/jenkins/basic.txt
@@ -58,7 +58,7 @@
 ./test.sh -f tsim/mnode/basic1.sim
 ./test.sh -f tsim/mnode/basic2.sim
 ./test.sh -f tsim/mnode/basic3.sim
-#./test.sh -f tsim/mnode/basic4.sim
+./test.sh -f tsim/mnode/basic4.sim
 
 # ---- show
 ./test.sh -f tsim/show/basic.sim
diff --git a/tests/script/tsim/db/alter_replica_31.sim b/tests/script/tsim/db/alter_replica_31.sim
new file mode 100644
index 0000000000000000000000000000000000000000..896d6708b779cc7896b06f0da1eeb8ca178243d1
--- /dev/null
+++ b/tests/script/tsim/db/alter_replica_31.sim
@@ -0,0 +1,146 @@
+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/exec.sh -n dnode1 -s start
+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 connect
+
+print =============== step1: create dnodes
+sql create dnode $hostname port 7200
+sql create dnode $hostname port 7300
+sql create dnode $hostname port 7400
+
+$x = 0
+step1:
+	$x = $x + 1
+	sleep 1000
+	if $x == 10 then
+	  print ====> dnode not ready!
+		return -1
+	endi
+sql show dnodes
+print ===> rows: $rows 
+print ===> $data00 $data01 $data02 $data03 $data04 $data05
+print ===> $data10 $data11 $data12 $data13 $data14 $data15
+print ===> $data20 $data21 $data22 $data23 $data24 $data25
+print ===> $data30 $data31 $data32 $data33 $data24 $data35
+if $rows != 4 then
+  return -1
+endi
+if $data(1)[4] != ready then
+  goto step1
+endi
+if $data(2)[4] != ready then
+  goto step1
+endi
+if $data(3)[4] != ready then
+  goto step1
+endi
+if $data(4)[4] != ready then
+  goto step1
+endi
+
+print =============== step2: create database
+sql create database db vgroups 1 replica 3
+sql show databases
+if $rows != 3 then 
+  return -1
+endi
+if $data(db)[4] != 3 then 
+  return -1
+endi
+
+sql show dnodes
+if $data(2)[2] != 1 then
+  return -1
+endi
+if $data(3)[2] != 1 then
+  return -1
+endi
+if $data(4)[2] != 1 then
+  return -1
+endi
+
+# vnodes
+sql show dnodes
+if $data(2)[2] != 1 then
+  return -1
+endi
+if $data(3)[2] != 1 then
+  return -1
+endi
+if $data(4)[2] != 1 then
+  return -1
+endi
+
+# v1_dnode
+sql show db.vgroups
+print ===> $data00 $data01 $data02 $data03 $data04 $data05 $data06 $data07 $data08
+if $data(2)[3] != 4 then
+  return -1
+endi
+if $data(2)[5] != 3 then
+  return -1
+endi
+if $data(2)[7] != 2 then
+  return -1
+endi
+
+sql create table db.stb (ts timestamp, c1 int, c2 binary(4)) tags(t1 int, t2 binary(16)) comment "abd"
+sql create table db.ctb using db.stb tags(101, "102")
+sql insert into db.ctb values(now, 1, "2")
+
+sql show db.vgroups
+print ===> $data00 $data01 $data02 $data03 $data04 $data05 $data06 $data07 $data08
+
+sleep 1000
+sql select * from db.ctb
+print ===> $data00 $data01 $data02 $data03 $data04 $data05
+
+if $rows != 1 then
+  return -1
+endi
+
+sleep 3000
+
+print ============= step3: alter database
+sql alter database db replica 1
+
+$x = 0
+step3:
+	$x = $x + 1
+	sleep 1000
+	if $x == 10 then
+	  print ====> dnode not ready!
+		return -1
+	endi
+sql show db.vgroups
+print ===> rows: $rows 
+if $rows != 1 then
+  goto step3
+endi
+if $data(2)[3] != 4 then
+  goto step3
+endi
+if $data(2)[5] != NULL then
+  goto step3
+endi
+if $data(2)[7] != NULL then
+  goto step3
+endi
+
+print ============= step5: stop dnode 2
+return
+sql select * from db.stb
+if $rows != 1 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
\ No newline at end of file