diff --git a/source/dnode/vnode/src/meta/metaCache.c b/source/dnode/vnode/src/meta/metaCache.c
index 21a1014e875b340873ea798010384d098d3d4c71..366c072b6f83cf40e404408843504257b2b107f5 100644
--- a/source/dnode/vnode/src/meta/metaCache.c
+++ b/source/dnode/vnode/src/meta/metaCache.c
@@ -508,11 +508,11 @@ static void freePayload(const void* key, size_t keyLen, void* value) {
 
   const uint64_t* p = key;
   if (keyLen != sizeof(int64_t) * 4) {
-    metaError("key length is invalid, length:%d, expect:%d", (int32_t) keyLen, (int32_t) sizeof(uint64_t)*2);
+    metaError("key length is invalid, length:%d, expect:%d", (int32_t)keyLen, (int32_t)sizeof(uint64_t) * 2);
     return;
   }
 
-  SHashObj* pHashObj = (SHashObj*)p[0];
+  SHashObj*            pHashObj = (SHashObj*)p[0];
   STagFilterResEntry** pEntry = taosHashGet(pHashObj, &p[1], sizeof(uint64_t));
 
   {
@@ -525,12 +525,13 @@ static void freePayload(const void* key, size_t keyLen, void* value) {
     while ((pNode = tdListNext(&iter)) != NULL) {
       uint64_t* digest = (uint64_t*)pNode->data;
       if (digest[0] == p[2] && digest[1] == p[3]) {
-        tdListPopNode(&((*pEntry)->list), pNode);
+        void* tmp = tdListPopNode(&((*pEntry)->list), pNode);
+        taosMemoryFree(tmp);
 
         int64_t et = taosGetTimestampUs();
         metaInfo("clear items in cache, remain cached item:%d, elapsed time:%.2fms", listNEles(&((*pEntry)->list)),
-                 (et - st)/1000.0);
-        return;
+                 (et - st) / 1000.0);
+        break;
       }
     }
   }
diff --git a/source/dnode/vnode/src/tq/tq.c b/source/dnode/vnode/src/tq/tq.c
index cca241a1cf7926b9df4e19aaad884ffa081382ee..3e13eaa6e8d27e4141f5d198b4632102dedece89 100644
--- a/source/dnode/vnode/src/tq/tq.c
+++ b/source/dnode/vnode/src/tq/tq.c
@@ -816,7 +816,6 @@ int32_t tqProcessSubscribeReq(STQ* pTq, int64_t version, char* msg, int32_t msgL
     // TODO version should be assigned and refed during preprocess
     SWalRef* pRef = walRefCommittedVer(pTq->pVnode->pWal);
     if (pRef == NULL) {
-      ASSERT(0);
       return -1;
     }
     int64_t ver = pRef->refVer;
@@ -837,12 +836,9 @@ int32_t tqProcessSubscribeReq(STQ* pTq, int64_t version, char* msg, int32_t msgL
 
       pHandle->execHandle.task =
           qCreateQueueExecTaskInfo(pHandle->execHandle.execCol.qmsg, &handle, &pHandle->execHandle.numOfCols, NULL);
-      ASSERT(pHandle->execHandle.task);
       void* scanner = NULL;
       qExtractStreamScanner(pHandle->execHandle.task, &scanner);
-      ASSERT(scanner);
       pHandle->execHandle.pExecReader = qExtractReaderFromStreamScanner(scanner);
-      ASSERT(pHandle->execHandle.pExecReader);
     } else if (pHandle->execHandle.subType == TOPIC_SUB_TYPE__DB) {
       pHandle->pWalReader = walOpenReader(pTq->pVnode->pWal, NULL);
       pHandle->execHandle.pExecReader = tqOpenReader(pTq->pVnode);
@@ -875,8 +871,7 @@ int32_t tqProcessSubscribeReq(STQ* pTq, int64_t version, char* msg, int32_t msgL
     taosHashPut(pTq->pHandle, req.subKey, strlen(req.subKey), pHandle, sizeof(STqHandle));
     tqDebug("try to persist handle %s consumer %" PRId64, req.subKey, pHandle->consumerId);
     if (tqMetaSaveHandle(pTq, req.subKey, pHandle) < 0) {
-      // TODO
-      ASSERT(0);
+      return -1;
     }
   } else {
     /*ASSERT(pExec->consumerId == req.oldConsumerId);*/
@@ -886,8 +881,7 @@ int32_t tqProcessSubscribeReq(STQ* pTq, int64_t version, char* msg, int32_t msgL
     atomic_add_fetch_32(&pHandle->epoch, 1);
     taosMemoryFree(req.qmsg);
     if (tqMetaSaveHandle(pTq, req.subKey, pHandle) < 0) {
-      // TODO
-      ASSERT(0);
+      return -1;
     }
     // close handle
   }
diff --git a/source/dnode/vnode/src/tq/tqMeta.c b/source/dnode/vnode/src/tq/tqMeta.c
index 3ad01e2370bae65d474d06c0f4dde37c1df96f48..34f57bc697a2e6ad0fb80f8a437b12bb9070dea0 100644
--- a/source/dnode/vnode/src/tq/tqMeta.c
+++ b/source/dnode/vnode/src/tq/tqMeta.c
@@ -71,17 +71,14 @@ int32_t tDecodeSTqHandle(SDecoder* pDecoder, STqHandle* pHandle) {
 
 int32_t tqMetaOpen(STQ* pTq) {
   if (tdbOpen(pTq->path, 16 * 1024, 1, &pTq->pMetaDB, 0) < 0) {
-    ASSERT(0);
     return -1;
   }
 
   if (tdbTbOpen("tq.db", -1, -1, NULL, pTq->pMetaDB, &pTq->pExecStore, 0) < 0) {
-    ASSERT(0);
     return -1;
   }
 
   if (tdbTbOpen("tq.check.db", -1, -1, NULL, pTq->pMetaDB, &pTq->pCheckStore, 0) < 0) {
-    ASSERT(0);
     return -1;
   }
 
@@ -197,40 +194,49 @@ int32_t tqMetaSaveHandle(STQ* pTq, const char* key, const STqHandle* pHandle) {
   int32_t code;
   int32_t vlen;
   tEncodeSize(tEncodeSTqHandle, pHandle, vlen, code);
-  ASSERT(code == 0);
 
   tqDebug("tq save %s(%d) consumer %" PRId64 " vgId:%d", pHandle->subKey, (int32_t)strlen(pHandle->subKey),
           pHandle->consumerId, TD_VID(pTq->pVnode));
 
   void* buf = taosMemoryCalloc(1, vlen);
   if (buf == NULL) {
-    ASSERT(0);
+    return -1;
   }
 
   SEncoder encoder;
   tEncoderInit(&encoder, buf, vlen);
 
   if (tEncodeSTqHandle(&encoder, pHandle) < 0) {
-    ASSERT(0);
+    tEncoderClear(&encoder);
+    taosMemoryFree(buf);
+    return -1;
   }
 
   TXN* txn;
 
   if (tdbBegin(pTq->pMetaDB, &txn, tdbDefaultMalloc, tdbDefaultFree, NULL, TDB_TXN_WRITE | TDB_TXN_READ_UNCOMMITTED) <
       0) {
-    ASSERT(0);
+    tEncoderClear(&encoder);
+    taosMemoryFree(buf);
+    return -1;
   }
 
   if (tdbTbUpsert(pTq->pExecStore, key, (int)strlen(key), buf, vlen, txn) < 0) {
-    ASSERT(0);
+    tEncoderClear(&encoder);
+    taosMemoryFree(buf);
+    return -1;
   }
 
   if (tdbCommit(pTq->pMetaDB, txn) < 0) {
-    ASSERT(0);
+    tEncoderClear(&encoder);
+    taosMemoryFree(buf);
+    return -1;
   }
 
   if (tdbPostCommit(pTq->pMetaDB, txn) < 0) {
-    ASSERT(0);
+    tEncoderClear(&encoder);
+    taosMemoryFree(buf);
+    return -1;
   }
 
   tEncoderClear(&encoder);
diff --git a/source/libs/executor/src/executil.c b/source/libs/executor/src/executil.c
index a98accba774692e555ce28162fc36723e84fb2fa..040e67713d370fcae4b8893fbf7d3b69b71a4e71 100644
--- a/source/libs/executor/src/executil.c
+++ b/source/libs/executor/src/executil.c
@@ -1086,13 +1086,12 @@ int32_t getTableList(void* metaHandle, void* pVnode, SScanPhysiNode* pScanNode,
       size_t size = numOfTables * sizeof(uint64_t) + sizeof(int32_t);
       char*  pPayload = taosMemoryMalloc(size);
 
+      *(int32_t*)pPayload = numOfTables;
       if (numOfTables > 0) {
-        *(int32_t*)pPayload = numOfTables;
         memcpy(pPayload + sizeof(int32_t), taosArrayGet(pUidList, 0), numOfTables * sizeof(uint64_t));
       }
 
       metaUidFilterCachePut(metaHandle, pScanNode->suid, context.digest, tListLen(context.digest), pPayload, size, 1);
-      taosMemoryFree(pPayload);
     }
   }
 
diff --git a/source/libs/wal/src/walWrite.c b/source/libs/wal/src/walWrite.c
index 643fc839998d317b0ea4f9f0883ce2cc5715f054..96c77d09717df50920252b311c90607db5ab4dc8 100644
--- a/source/libs/wal/src/walWrite.c
+++ b/source/libs/wal/src/walWrite.c
@@ -87,8 +87,6 @@ int32_t walApplyVer(SWal *pWal, int64_t ver) {
 }
 
 int32_t walCommit(SWal *pWal, int64_t ver) {
-  ASSERT(pWal->vers.commitVer >= pWal->vers.snapshotVer);
-  ASSERT(pWal->vers.commitVer <= pWal->vers.lastVer);
   if (ver < pWal->vers.commitVer) {
     return 0;
   }
@@ -138,25 +136,21 @@ int32_t walRollback(SWal *pWal, int64_t ver) {
   TdFilePtr pIdxFile = taosOpenFile(fnameStr, TD_FILE_WRITE | TD_FILE_READ | TD_FILE_APPEND);
 
   if (pIdxFile == NULL) {
-    ASSERT(0);
     taosThreadMutexUnlock(&pWal->mutex);
     return -1;
   }
   int64_t idxOff = walGetVerIdxOffset(pWal, ver);
   code = taosLSeekFile(pIdxFile, idxOff, SEEK_SET);
   if (code < 0) {
-    ASSERT(0);
     taosThreadMutexUnlock(&pWal->mutex);
     return -1;
   }
   // read idx file and get log file pos
   SWalIdxEntry entry;
   if (taosReadFile(pIdxFile, &entry, sizeof(SWalIdxEntry)) != sizeof(SWalIdxEntry)) {
-    ASSERT(0);
     taosThreadMutexUnlock(&pWal->mutex);
     return -1;
   }
-  ASSERT(entry.ver == ver);
 
   walBuildLogName(pWal, walGetCurFileFirstVer(pWal), fnameStr);
   TdFilePtr pLogFile = taosOpenFile(fnameStr, TD_FILE_WRITE | TD_FILE_READ | TD_FILE_APPEND);
@@ -176,24 +170,19 @@ int32_t walRollback(SWal *pWal, int64_t ver) {
   }
   // validate offset
   SWalCkHead head;
-  ASSERT(taosValidFile(pLogFile));
-  int64_t size = taosReadFile(pLogFile, &head, sizeof(SWalCkHead));
+  int64_t    size = taosReadFile(pLogFile, &head, sizeof(SWalCkHead));
   if (size != sizeof(SWalCkHead)) {
-    ASSERT(0);
     taosThreadMutexUnlock(&pWal->mutex);
     return -1;
   }
   code = walValidHeadCksum(&head);
 
-  ASSERT(code == 0);
   if (code != 0) {
     terrno = TSDB_CODE_WAL_FILE_CORRUPTED;
-    ASSERT(0);
     taosThreadMutexUnlock(&pWal->mutex);
     return -1;
   }
   if (head.head.version != ver) {
-    ASSERT(0);
     terrno = TSDB_CODE_WAL_FILE_CORRUPTED;
     taosThreadMutexUnlock(&pWal->mutex);
     return -1;
@@ -202,22 +191,17 @@ int32_t walRollback(SWal *pWal, int64_t ver) {
   // truncate old files
   code = taosFtruncateFile(pLogFile, entry.offset);
   if (code < 0) {
-    ASSERT(0);
     terrno = TAOS_SYSTEM_ERROR(errno);
     taosThreadMutexUnlock(&pWal->mutex);
     return -1;
   }
   code = taosFtruncateFile(pIdxFile, idxOff);
   if (code < 0) {
-    ASSERT(0);
     terrno = TAOS_SYSTEM_ERROR(errno);
     taosThreadMutexUnlock(&pWal->mutex);
     return -1;
   }
   pWal->vers.lastVer = ver - 1;
-  if (pWal->vers.lastVer < pWal->vers.firstVer) {
-    ASSERT(pWal->vers.lastVer == pWal->vers.firstVer - 1);
-  }
   ((SWalFileInfo *)taosArrayGetLast(pWal->fileInfoSet))->lastVer = ver - 1;
   ((SWalFileInfo *)taosArrayGetLast(pWal->fileInfoSet))->fileSize = entry.offset;
   taosCloseFile(&pIdxFile);
@@ -386,7 +370,7 @@ int32_t walEndSnapshot(SWal *pWal) {
     walBuildIdxName(pWal, pInfo->firstVer, fnameStr);
     wDebug("vgId:%d, wal remove file %s", pWal->cfg.vgId, fnameStr);
     if (taosRemoveFile(fnameStr) < 0 && errno != ENOENT) {
-      ASSERT(0);
+      goto END;
     }
   }
   taosArrayClear(pWal->toDeleteFiles);
@@ -441,7 +425,6 @@ int32_t walRollImpl(SWal *pWal) {
   pWal->pIdxFile = pIdxFile;
   pWal->pLogFile = pLogFile;
   pWal->writeCur = taosArrayGetSize(pWal->fileInfoSet) - 1;
-  ASSERT(pWal->writeCur >= 0);
 
   pWal->lastRollSeq = walGetSeq();
 
@@ -458,9 +441,7 @@ END:
 static int32_t walWriteIndex(SWal *pWal, int64_t ver, int64_t offset) {
   SWalIdxEntry  entry = {.ver = ver, .offset = offset};
   SWalFileInfo *pFileInfo = walGetCurFileInfo(pWal);
-  ASSERT(pFileInfo != NULL);
-  ASSERT(pFileInfo->firstVer >= 0);
-  int64_t idxOffset = (entry.ver - pFileInfo->firstVer) * sizeof(SWalIdxEntry);
+  int64_t       idxOffset = (entry.ver - pFileInfo->firstVer) * sizeof(SWalIdxEntry);
   wDebug("vgId:%d, write index, index:%" PRId64 ", offset:%" PRId64 ", at %" PRId64, pWal->cfg.vgId, ver, offset,
          idxOffset);
 
@@ -476,7 +457,6 @@ static int32_t walWriteIndex(SWal *pWal, int64_t ver, int64_t offset) {
   if (endOffset < 0) {
     wFatal("vgId:%d, failed to seek end of idxfile due to %s. ver:%" PRId64 "", pWal->cfg.vgId, strerror(errno), ver);
   }
-  ASSERT(endOffset == idxOffset + sizeof(SWalIdxEntry) && "Offset of idx entries misaligned");
   return 0;
 }
 
@@ -486,9 +466,7 @@ static FORCE_INLINE int32_t walWriteImpl(SWal *pWal, int64_t index, tmsg_t msgTy
 
   int64_t       offset = walGetCurFileOffset(pWal);
   SWalFileInfo *pFileInfo = walGetCurFileInfo(pWal);
-  ASSERT(pFileInfo != NULL);
 
-  ASSERT(pFileInfo->firstVer != -1);
   pWal->writeHead.head.version = index;
   pWal->writeHead.head.bodyLen = bodyLen;
   pWal->writeHead.head.msgType = msgType;
@@ -525,7 +503,6 @@ static FORCE_INLINE int32_t walWriteImpl(SWal *pWal, int64_t index, tmsg_t msgTy
 
   // set status
   if (pWal->vers.firstVer == -1) {
-    ASSERT(index == 0);
     pWal->vers.firstVer = 0;
   }
   pWal->vers.lastVer = index;
@@ -541,7 +518,6 @@ END:
     wFatal("vgId:%d, failed to ftruncate logfile to offset:%" PRId64 " during recovery due to %s", pWal->cfg.vgId,
            offset, strerror(errno));
     terrno = TAOS_SYSTEM_ERROR(errno);
-    ASSERT(0 && "failed to recover from error");
   }
 
   int64_t idxOffset = (index - pFileInfo->firstVer) * sizeof(SWalIdxEntry);
@@ -549,7 +525,6 @@ END:
     wFatal("vgId:%d, failed to ftruncate idxfile to offset:%" PRId64 "during recovery due to %s", pWal->cfg.vgId,
            idxOffset, strerror(errno));
     terrno = TAOS_SYSTEM_ERROR(errno);
-    ASSERT(0 && "failed to recover from error");
   }
   return -1;
 }
@@ -576,8 +551,6 @@ int64_t walAppendLog(SWal *pWal, int64_t index, tmsg_t msgType, SWalSyncInfo syn
     }
   }
 
-  ASSERT(pWal->pLogFile != NULL && pWal->pIdxFile != NULL && pWal->writeCur >= 0);
-
   if (walWriteImpl(pWal, index, msgType, syncMeta, body, bodyLen) < 0) {
     taosThreadMutexUnlock(&pWal->mutex);
     return -1;
@@ -614,8 +587,6 @@ int32_t walWriteWithSyncInfo(SWal *pWal, int64_t index, tmsg_t msgType, SWalSync
     }
   }
 
-  ASSERT(pWal->pIdxFile != NULL && pWal->pLogFile != NULL && pWal->writeCur >= 0);
-
   if (walWriteImpl(pWal, index, msgType, syncMeta, body, bodyLen) < 0) {
     taosThreadMutexUnlock(&pWal->mutex);
     return -1;
diff --git a/tools/shell/inc/shellAuto.h b/tools/shell/inc/shellAuto.h
index b7bf5fa1019502acbeaefc8884d4553704f58702..151f6da8c6555118699eedbf791da32e47e4283e 100644
--- a/tools/shell/inc/shellAuto.h
+++ b/tools/shell/inc/shellAuto.h
@@ -28,7 +28,7 @@ void pressOtherKey(char c);
 bool shellAutoInit();
 
 // set conn
-void shellSetConn(TAOS* conn);
+void shellSetConn(TAOS* conn, bool runOnce);
 
 // exit shell auto funciton, shell exit call once
 void shellAutoExit();
diff --git a/tools/shell/src/shellAuto.c b/tools/shell/src/shellAuto.c
index 6e50a97c0264736a8cdb68ad94c76debad8a3614..3589558d649fd8742d8bc7fff5c4ae4d51b9845b 100644
--- a/tools/shell/src/shellAuto.c
+++ b/tools/shell/src/shellAuto.c
@@ -332,6 +332,7 @@ bool varMode = false;  // enter var names list mode
 
 TAOS*      varCon = NULL;
 SShellCmd* varCmd = NULL;
+bool       varRunOnce = false;
 SMatch*    lastMatch = NULL;  // save last match result
 int        cntDel = 0;        // delete byte count after next press tab
 
@@ -375,7 +376,7 @@ void showHelp() {
   ----- C ----- \n\
     create table <tb_name> using <stb_name> tags ...\n\
     create database <db_name> <db_options>  ...\n\
-    create dnode \"fqdn:port\"n\
+    create dnode \"fqdn:port\" ...\n\
     create index ...\n\
     create mnode on dnode <dnode_id> ;\n\
     create qnode on dnode <dnode_id> ;\n\
@@ -637,10 +638,11 @@ bool shellAutoInit() {
 }
 
 // set conn
-void shellSetConn(TAOS* conn) { 
-  varCon = conn; 
+void shellSetConn(TAOS* conn, bool runOnce) {
+  varCon = conn;
+  varRunOnce = runOnce;
   // init database and stable
-  updateTireValue(WT_VAR_DBNAME, false);
+  if (!runOnce) updateTireValue(WT_VAR_DBNAME, false);
 }
 
 // exit shell auto funciton, shell exit call once
@@ -784,6 +786,12 @@ int writeVarNames(int type, TAOS_RES* tres) {
   return numOfRows;
 }
 
+void setThreadNull(int type) {
+  taosThreadMutexLock(&tiresMutex);
+  threads[type] = NULL;
+  taosThreadMutexUnlock(&tiresMutex);
+}
+
 bool firstMatchCommand(TAOS* con, SShellCmd* cmd);
 //
 //  thread obtain var thread from db server
@@ -799,6 +807,7 @@ void* varObtainThread(void* param) {
   TAOS_RES* pSql = taos_query(varCon, varSqls[type]);
   if (taos_errno(pSql)) {
     taos_free_result(pSql);
+    setThreadNull(type);
     return NULL;
   }
 
@@ -814,6 +823,7 @@ void* varObtainThread(void* param) {
     firstMatchCommand(varCon, varCmd);
   }
 
+  setThreadNull(type);
   return NULL;
 }
 
@@ -1725,10 +1735,12 @@ _return:
 
 // main key press tab
 void pressTabKey(SShellCmd* cmd) {
-  // check
+  // check empty tab key
   if (cmd->commandSize == 0) {
-    // empty
-    showHelp();
+    // have multi line tab key
+    if(cmd->bufferSize == 0) {
+      showHelp();
+    }
     shellShowOnScreen(cmd);
     return;
   }
@@ -1977,7 +1989,7 @@ void callbackAutoTab(char* sqlstr, TAOS* pSql, bool usedb) {
 
   if (dealUseDB(sql)) {
     // change to new db
-    updateTireValue(WT_VAR_STABLE, false);
+    if (!varRunOnce) updateTireValue(WT_VAR_STABLE, false);
     return;
   }
 
diff --git a/tools/shell/src/shellEngine.c b/tools/shell/src/shellEngine.c
index 479c2cf39a30fdeb2bed0a855445eac240d56c9f..9b842a9e6f0ba38e90804ff853bc9cad07cfcd52 100644
--- a/tools/shell/src/shellEngine.c
+++ b/tools/shell/src/shellEngine.c
@@ -1097,10 +1097,11 @@ int32_t shellExecute() {
   }
 #endif
 
-  shellSetConn(shell.conn);
+  bool runOnce = pArgs->commands != NULL || pArgs->file[0] != 0;
+  shellSetConn(shell.conn, runOnce);
   shellReadHistory();
 
-  if (pArgs->commands != NULL || pArgs->file[0] != 0) {
+  if (runOnce) {
     if (pArgs->commands != NULL) {
       printf("%s%s\r\n", shell.info.promptHeader, pArgs->commands);
       char *cmd = strdup(pArgs->commands);
@@ -1160,5 +1161,8 @@ int32_t shellExecute() {
   taosThreadJoin(spid, NULL);
 
   shellCleanupHistory();
+  taos_kill_query(shell.conn);
+  taos_close(shell.conn);
+
   return 0;
 }