diff --git a/source/dnode/mnode/impl/src/mndConsumer.c b/source/dnode/mnode/impl/src/mndConsumer.c
index 8b67d2e8a4..dd0d2212fa 100644
--- a/source/dnode/mnode/impl/src/mndConsumer.c
+++ b/source/dnode/mnode/impl/src/mndConsumer.c
@@ -399,7 +399,7 @@ static int32_t mndProcessSubscribeReq(SRpcMsg *pMsg) {
 
   int32_t newTopicNum = taosArrayGetSize(newSub);
   // check topic existance
-  STrans *pTrans = mndTransCreate(pMnode, TRN_POLICY_RETRY, TRN_TYPE_SUBSCRIBE, &pMsg->rpcMsg);
+  STrans *pTrans = mndTransCreate(pMnode, TRN_POLICY_RETRY, TRN_TYPE_SUBSCRIBE, pMsg);
   if (pTrans == NULL) goto SUBSCRIBE_OVER;
 
   for (int32_t i = 0; i < newTopicNum; i++) {
diff --git a/source/dnode/mnode/impl/src/mndSubscribe.c b/source/dnode/mnode/impl/src/mndSubscribe.c
index b8570ed134..71c8ac8daf 100644
--- a/source/dnode/mnode/impl/src/mndSubscribe.c
+++ b/source/dnode/mnode/impl/src/mndSubscribe.c
@@ -390,7 +390,7 @@ static int32_t mndDoRebalance(SMnode *pMnode, const SMqRebInputObj *pInput, SMqR
 }
 
 static int32_t mndPersistRebResult(SMnode *pMnode, SRpcMsg *pMsg, const SMqRebOutputObj *pOutput) {
-  STrans *pTrans = mndTransCreate(pMnode, TRN_POLICY_ROLLBACK, TRN_TYPE_REBALANCE, &pMsg->rpcMsg);
+  STrans *pTrans = mndTransCreate(pMnode, TRN_POLICY_ROLLBACK, TRN_TYPE_REBALANCE, pMsg);
   if (pTrans == NULL) {
     return -1;
   }
diff --git a/source/dnode/mnode/impl/src/mndTopic.c b/source/dnode/mnode/impl/src/mndTopic.c
index 63168a147f..2bbed471f6 100644
--- a/source/dnode/mnode/impl/src/mndTopic.c
+++ b/source/dnode/mnode/impl/src/mndTopic.c
@@ -464,22 +464,24 @@ static int32_t mndDropTopic(SMnode *pMnode, STrans *pTrans, SRpcMsg *pReq, SMqTo
 }
 
 static int32_t mndProcessDropTopicReq(SRpcMsg *pReq) {
-  SMnode        *pMnode = pReq->pNode;
+  SMnode        *pMnode = pReq->info.node;
   SSdb          *pSdb = pMnode->pSdb;
   SMDropTopicReq dropReq = {0};
 
   if (tDeserializeSMDropTopicReq(pReq->pCont, pReq->contLen, &dropReq) != 0) {
     terrno = TSDB_CODE_INVALID_MSG;
-    }
+    return -1;
   }
 
+  SMqTopicObj *pTopic = mndAcquireTopic(pMnode, dropReq.name);
   if (pTopic->refConsumerCnt != 0) {
+    mndReleaseTopic(pMnode, pTopic);
     terrno = TSDB_CODE_MND_TOPIC_SUBSCRIBED;
     mError("topic:%s, failed to drop since %s", dropReq.name, terrstr());
     return -1;
   }
 
-  STrans *pTrans = mndTransCreate(pMnode, TRN_POLICY_ROLLBACK, TRN_TYPE_DROP_TOPIC, &pReq->rpcMsg);
+  STrans *pTrans = mndTransCreate(pMnode, TRN_POLICY_ROLLBACK, TRN_TYPE_DROP_TOPIC, pReq);
   if (pTrans == NULL) {
     mError("topic:%s, failed to drop since %s", pTopic->name, terrstr());
     return -1;
diff --git a/source/libs/function/src/udfd.c b/source/libs/function/src/udfd.c
index 19421072f8..1bb775de5b 100644
--- a/source/libs/function/src/udfd.c
+++ b/source/libs/function/src/udfd.c
@@ -529,8 +529,8 @@ typedef struct SUdfdRpcSendRecvInfo {
 
 
 void udfdProcessRpcRsp(void *parent, SRpcMsg *pMsg, SEpSet *pEpSet) {
-  SUdfdRpcSendRecvInfo *msgInfo = (SUdfdRpcSendRecvInfo *)pMsg->ahandle;
-  ASSERT(pMsg->ahandle != NULL);
+  SUdfdRpcSendRecvInfo *msgInfo = (SUdfdRpcSendRecvInfo *)pMsg->info.ahandle;
+  ASSERT(pMsg->info.ahandle != NULL);
 
   if (pEpSet) {
     if (!isEpsetEqual(&global.mgmtEp.epSet, pEpSet)) {
@@ -609,7 +609,7 @@ int32_t udfdConnectToMNode() {
   rpcMsg.msgType = TDMT_MND_CONNECT;
   rpcMsg.pCont = pReq;
   rpcMsg.contLen = contLen;
-  rpcMsg.ahandle = msgInfo;
+  rpcMsg.info.ahandle = msgInfo;
   rpcSendRequest(global.clientRpc, &global.mgmtEp.epSet, &rpcMsg, NULL);
 
   uv_sem_wait(&msgInfo->resultSem);
@@ -639,7 +639,7 @@ int32_t udfdFillUdfInfoFromMNode(void *clientRpc, char *udfName, SUdf *udf) {
   rpcMsg.pCont = pReq;
   rpcMsg.contLen = contLen;
   rpcMsg.msgType = TDMT_MND_RETRIEVE_FUNC;
-  rpcMsg.ahandle = msgInfo;
+  rpcMsg.info.ahandle = msgInfo;
   rpcSendRequest(clientRpc, &global.mgmtEp.epSet, &rpcMsg, NULL);
 
   uv_sem_wait(&msgInfo->resultSem);
diff --git a/tests/script/tsim/query/explain.sim b/tests/script/tsim/query/explain.sim
index 71f7969c83..21162a99b0 100644
--- a/tests/script/tsim/query/explain.sim
+++ b/tests/script/tsim/query/explain.sim
@@ -1,12 +1,8 @@
 system sh/stop_dnodes.sh
-
 system sh/deploy.sh -n dnode1 -i 1
-system sh/cfg.sh -n dnode1 -c wallevel -v 2
-system sh/cfg.sh -n dnode1 -c numOfMnodes -v 1
 
 print ========= start dnode1 as LEADER
 system sh/exec.sh -n dnode1 -s start
-sleep 2000
 sql connect
 
 print ======== step1