diff --git a/source/common/src/tmsgcb.c b/source/libs/transport/src/tmsgcb.c
similarity index 77%
rename from source/common/src/tmsgcb.c
rename to source/libs/transport/src/tmsgcb.c
index b8eec655b125eadf3a8e4f199168ef4bf96109a0..aefc25fab45dd5e49ad7667176d9e4aabd867298 100644
--- a/source/common/src/tmsgcb.c
+++ b/source/libs/transport/src/tmsgcb.c
@@ -16,20 +16,33 @@
 #define _DEFAULT_SOURCE
 #include "tmsgcb.h"
 #include "taoserror.h"
+#include "trpc.h"
 
 static SMsgCb defaultMsgCb;
 
 void tmsgSetDefault(const SMsgCb* msgcb) { defaultMsgCb = *msgcb; }
 
 int32_t tmsgPutToQueue(const SMsgCb* msgcb, EQueueType qtype, SRpcMsg* pMsg) {
-  return (*msgcb->putToQueueFp)(msgcb->mgmt, qtype, pMsg);
+  int32_t code = (*msgcb->putToQueueFp)(msgcb->mgmt, qtype, pMsg);
+  if (code != 0) {
+    rpcFreeCont(pMsg->pCont);
+    pMsg->pCont = NULL;
+  }
+  return code;
 }
 
 int32_t tmsgGetQueueSize(const SMsgCb* msgcb, int32_t vgId, EQueueType qtype) {
   return (*msgcb->qsizeFp)(msgcb->mgmt, vgId, qtype);
 }
 
-int32_t tmsgSendReq(const SEpSet* epSet, SRpcMsg* pMsg) { return (*defaultMsgCb.sendReqFp)(epSet, pMsg); }
+int32_t tmsgSendReq(const SEpSet* epSet, SRpcMsg* pMsg) {
+  int32_t code = (*defaultMsgCb.sendReqFp)(epSet, pMsg);
+  if (code != 0) {
+    rpcFreeCont(pMsg->pCont);
+    pMsg->pCont = NULL;
+  }
+  return code;
+}
 
 void tmsgSendRsp(SRpcMsg* pMsg) { return (*defaultMsgCb.sendRspFp)(pMsg); }
 
diff --git a/tests/script/tsim/valgrind/basic2.sim b/tests/script/tsim/valgrind/basic2.sim
index 157ac002e60a31a7b27c7d22e6a5fad9cca02079..1a76d8ce5c410c6e3bfa159ca535fcc472df2a34 100644
--- a/tests/script/tsim/valgrind/basic2.sim
+++ b/tests/script/tsim/valgrind/basic2.sim
@@ -4,29 +4,107 @@ system sh/cfg.sh -n dnode1 -c debugflag -v 131
 system sh/exec.sh -n dnode1 -s start -v
 sql connect
 
-print =============== step1: create drop show dnodes
+print =============== step1: show dnodes
 $x = 0
 step1:
 	$x = $x + 1
 	sleep 1000
 	if $x == 10 then
-	  print ----> dnode not ready!
+	  print ---> dnode not ready!
 		return -1
 	endi
 sql show dnodes
-print ----> $data00 $data01 $data02 $data03 $data04 $data05
+print ---> $data00 $data01 $data02 $data03 $data04 $data05
 if $rows != 1 then
   return -1
 endi
+if $data(1)[4] != ready then
+  goto step1
+endi
+
+print =============== step2: create alter drop show user
+sql create user u1 pass 'taosdata'
+sql show users
+sql alter user u1 sysinfo 1
+sql alter user u1 enable 1
+sql alter user u1 pass 'taosdata'
+sql drop user u1
+sql_error alter user u2 sysinfo 0
+
+print =============== step3: create drop dnode
+sql create dnode $hostname port 7200
+sql drop dnode 2
+sql alter dnode 1 'debugflag 131'
 
-print =============== step2
-sql create database db vgroups 1 buffer 3
-sql use db
-sql create table if not exists stb (ts timestamp, c1 int, c2 float, c3 double) tags (t1 int unsigned)
-sql create table ct1 using stb tags(1000)
-sql insert into ct1 values(now+0s, 10, 2.0, 3.0)
-sql insert into ct1 values(now+1s, 11, 2.1, 3.1)(now+2s, -12, -2.2, -3.2)(now+3s, -13, -2.3, -3.3)
+print =============== step4:
+
+print =============== run show xxxx
+sql show dnodes
+if $rows != 1 then 
+  return -1
+endi
 
+sql show mnodes
+if $rows != 1 then 
+  return -1
+endi
 
-_OVER:
+sql show databases
+if $rows != 2 then
+  return -1
+endi
+
+sql show users
+if $rows != 1 then 
+  return -1
+endi
+
+print =============== run select * from information_schema.xxxx
+sql select * from information_schema.`dnodes`
+if $rows != 1 then 
+  return -1
+endi
+
+sql select * from information_schema.`mnodes`
+if $rows != 1 then 
+  return -1
+endi
+
+sql select * from information_schema.user_users
+if $rows != 1 then 
+  return -1
+endi
+
+sql show variables;
+if $rows != 4 then
+  return -1
+endi
+
+sql show dnode 1 variables;
+if $rows <= 0 then
+  return -1
+endi
+
+sql show local variables;
+if $rows <= 0 then
+  return -1
+endi
+
+print =============== stop
 system sh/exec.sh -n dnode1 -s stop -x SIGINT
+
+print =============== check
+print ----> start to check if there are ERRORS in vagrind log file for each dnode
+system_content sh/checkValgrind.sh -n dnode1 
+
+print cmd return result ----> [ $system_content ]
+if $system_content <= 0 then
+  return 0
+endi 
+
+$null=
+if $system_content == $null then
+  return 0
+endi 
+
+return -1