diff --git a/source/dnode/mnode/impl/src/mndSma.c b/source/dnode/mnode/impl/src/mndSma.c
index e82e5e0870..b2bffd68a6 100644
--- a/source/dnode/mnode/impl/src/mndSma.c
+++ b/source/dnode/mnode/impl/src/mndSma.c
@@ -238,6 +238,7 @@ SSmaObj *mndAcquireSma(SMnode *pMnode, char *smaName) {
   SSmaObj *pSma = sdbAcquire(pSdb, SDB_SMA, smaName);
   if (pSma == NULL && terrno == TSDB_CODE_SDB_OBJ_NOT_THERE) {
     terrno = TSDB_CODE_MND_SMA_NOT_EXIST;
+    ASSERT(0);
   }
   return pSma;
 }
@@ -812,12 +813,14 @@ static int32_t mndDropSma(SMnode *pMnode, SRpcMsg *pReq, SDbObj *pDb, SSmaObj *p
     if (mndDropStreamTasks(pMnode, pTrans, pStream) < 0) {
       mError("stream:%s, failed to drop task since %s", pStream->name, terrstr());
       sdbRelease(pMnode->pSdb, pStream);
+      ASSERT(0);
       goto _OVER;
     }
 
     // drop stream
     if (mndPersistDropStreamLog(pMnode, pTrans, pStream) < 0) {
       sdbRelease(pMnode->pSdb, pStream);
+      ASSERT(0);
       goto _OVER;
     }
   }
@@ -832,6 +835,9 @@ static int32_t mndDropSma(SMnode *pMnode, SRpcMsg *pReq, SDbObj *pDb, SSmaObj *p
   code = 0;
 
 _OVER:
+  if(code != 0) {
+    ASSERT(0);
+  }
   mndTransDrop(pTrans);
   mndReleaseVgroup(pMnode, pVgroup);
   mndReleaseStb(pMnode, pStb);
@@ -930,6 +936,7 @@ static int32_t mndProcessDropSmaReq(SRpcMsg *pReq) {
       goto _OVER;
     } else {
       terrno = TSDB_CODE_MND_SMA_NOT_EXIST;
+      ASSERT(0);
       goto _OVER;
     }
   }
diff --git a/source/dnode/vnode/src/meta/metaQuery.c b/source/dnode/vnode/src/meta/metaQuery.c
index db71c21615..797a60baf6 100644
--- a/source/dnode/vnode/src/meta/metaQuery.c
+++ b/source/dnode/vnode/src/meta/metaQuery.c
@@ -599,9 +599,11 @@ STSmaWrapper *metaGetSmaInfoByTable(SMeta *pMeta, tb_uid_t uid, bool deepCopy) {
   for (int i = 0; i < pSW->number; ++i) {
     smaId = *(tb_uid_t *)taosArrayGet(pSmaIds, i);
     if (metaGetTableEntryByUid(&mr, smaId) < 0) {
+      tDecoderClear(&mr.coder);
       metaWarn("vgId:%d, no entry for tbId:%" PRIi64 ", smaId:%" PRIi64, TD_VID(pMeta->pVnode), uid, smaId);
       continue;
     }
+    tDecoderClear(&mr.coder);
     pTSma = pSW->tSma + smaIdx;
     memcpy(pTSma, mr.me.smaEntry.tsma, sizeof(STSma));
     if (deepCopy) {
diff --git a/source/dnode/vnode/src/sma/smaRollup.c b/source/dnode/vnode/src/sma/smaRollup.c
index fd57441847..1c6d65c4d8 100644
--- a/source/dnode/vnode/src/sma/smaRollup.c
+++ b/source/dnode/vnode/src/sma/smaRollup.c
@@ -848,6 +848,7 @@ static int32_t tdRSmaRestoreQTaskInfoInit(SSma *pSma, int64_t *nTables) {
                terrstr());
       goto _err;
     }
+    tDecoderClear(&mr.coder);
     ASSERT(mr.me.type == TSDB_SUPER_TABLE);
     ASSERT(mr.me.uid == suid);
     if (TABLE_IS_ROLLUP(mr.me.flags)) {
diff --git a/source/libs/executor/src/scanoperator.c b/source/libs/executor/src/scanoperator.c
index c150b64940..c71292733a 100644
--- a/source/libs/executor/src/scanoperator.c
+++ b/source/libs/executor/src/scanoperator.c
@@ -758,6 +758,7 @@ static int32_t doGetTableRowSize(void* pMeta, uint64_t uid, int32_t* rowLen, con
     }
   } else if (mr.me.type == TSDB_CHILD_TABLE) {
     uint64_t suid = mr.me.ctbEntry.suid;
+    tDecoderClear(&mr.coder);
     code = metaGetTableEntryByUid(&mr, suid);
     if (code != TSDB_CODE_SUCCESS) {
       qError("failed to get table meta, uid:0x%" PRIx64 ", code:%s, %s", suid, tstrerror(terrno), idstr);
@@ -2510,6 +2511,7 @@ static SSDataBlock* doTagScan(SOperatorInfo* pOperator) {
   while (pInfo->curPos < size && count < pOperator->resultInfo.capacity) {
     STableKeyInfo* item = taosArrayGet(pInfo->pTableList->pTableList, pInfo->curPos);
     int32_t        code = metaGetTableEntryByUid(&mr, item->uid);
+    tDecoderClear(&mr.coder);
     if (code != TSDB_CODE_SUCCESS) {
       qError("failed to get table meta, uid:0x%" PRIx64 ", code:%s, %s", item->uid, tstrerror(terrno),
              GET_TASKID(pTaskInfo));