diff --git a/include/util/tlog.h b/include/util/tlog.h
index b6a389b6d9..e6ef7f388f 100644
--- a/include/util/tlog.h
+++ b/include/util/tlog.h
@@ -83,8 +83,8 @@ void taosPrintLongString(const char *flags, ELogLevel level, int32_t dflag, cons
 #endif
     ;
 
-bool taosAssertLog(bool condition, const char *file, int32_t line, const char *format, ...);
-#define ASSERTS(condition, ...) taosAssertLog(condition, __FILE__, __LINE__, __VA_ARGS__)
+bool taosAssert(bool condition, const char *file, int32_t line, const char *format, ...);
+#define ASSERTS(condition, ...) taosAssert(condition, __FILE__, __LINE__, __VA_ARGS__)
 #define ASSERT(condition)       ASSERTS(condition, "assert info not provided")
 
 // clang-format off
diff --git a/source/client/src/clientTmq.c b/source/client/src/clientTmq.c
index ade0c95227..766a94caf1 100644
--- a/source/client/src/clientTmq.c
+++ b/source/client/src/clientTmq.c
@@ -875,6 +875,7 @@ void tmqFreeImpl(void* handle) {
   tmq_t* tmq = (tmq_t*)handle;
 
   // TODO stop timer
+  tmqClearUnhandleMsg(tmq);
   if (tmq->mqueue) taosCloseQueue(tmq->mqueue);
   if (tmq->delayedTask) taosCloseQueue(tmq->delayedTask);
   if (tmq->qall) taosFreeQall(tmq->qall);
@@ -884,8 +885,7 @@ void tmqFreeImpl(void* handle) {
   int32_t sz = taosArrayGetSize(tmq->clientTopics);
   for (int32_t i = 0; i < sz; i++) {
     SMqClientTopic* pTopic = taosArrayGet(tmq->clientTopics, i);
-    if (pTopic->schema.nCols) taosMemoryFreeClear(pTopic->schema.pSchema);
-    int32_t vgSz = taosArrayGetSize(pTopic->vgs);
+    taosMemoryFreeClear(pTopic->schema.pSchema);
     taosArrayDestroy(pTopic->vgs);
   }
   taosArrayDestroy(tmq->clientTopics);
@@ -1304,7 +1304,6 @@ bool tmqUpdateEp(tmq_t* tmq, int32_t epoch, const SMqAskEpRsp* pRsp) {
     for (int32_t i = 0; i < sz; i++) {
       SMqClientTopic* pTopic = taosArrayGet(tmq->clientTopics, i);
       if (pTopic->schema.nCols) taosMemoryFreeClear(pTopic->schema.pSchema);
-      int32_t vgSz = taosArrayGetSize(pTopic->vgs);
       taosArrayDestroy(pTopic->vgs);
     }
     taosArrayDestroy(tmq->clientTopics);
@@ -1410,7 +1409,7 @@ int32_t tmqAskEp(tmq_t* tmq, bool async) {
     return -1;
   }
   void* pReq = taosMemoryCalloc(1, tlen);
-  if (tlen < 0) {
+  if (pReq == NULL) {
     tscError("failed to malloc askEpReq msg, size:%d", tlen);
     return -1;
   }
@@ -1738,7 +1737,7 @@ void* tmqHandleAllRsp(tmq_t* tmq, int64_t timeout, bool pollIfReset) {
         taosFreeQitem(pollRspWrapper);
         return pRsp;
       } else {
-        tscDebug("msg discard since epoch mismatch: msg epoch %d, consumer epoch %d\n",
+        tscDebug("msg discard since epoch mismatch: msg epoch %d, consumer epoch %d",
                  pollRspWrapper->taosxRsp.head.epoch, consumerEpoch);
         taosFreeQitem(pollRspWrapper);
       }
diff --git a/source/dnode/mgmt/exe/dmMain.c b/source/dnode/mgmt/exe/dmMain.c
index b4e2379736..a8103351b4 100644
--- a/source/dnode/mgmt/exe/dmMain.c
+++ b/source/dnode/mgmt/exe/dmMain.c
@@ -17,6 +17,7 @@
 #include "dmMgmt.h"
 #include "mnode.h"
 #include "tconfig.h"
+#include "tglobal.h"
 
 // clang-format off
 #define DM_APOLLO_URL    "The apollo string to use when configuring the server, such as: -a 'jsonFile:./tests/cfg.json', cfg.json text can be '{\"fqdn\":\"td1\"}'."
@@ -45,9 +46,30 @@ static struct {
   SArray      *pArgs;  // SConfigPair
 } global = {0};
 
-static void dmStopDnode(int signum, void *info, void *ctx) { dmStop(); }
+static void dmSetDebugFlag(int32_t signum, void *sigInfo, void *context) { taosSetAllDebugFlag(143, true); }
+static void dmSetAssert(int32_t signum, void *sigInfo, void *context) { tsAssert = 1; }
+
+static void dmStopDnode(int signum, void *sigInfo, void *context) {
+  // taosIgnSignal(SIGUSR1);
+  // taosIgnSignal(SIGUSR2);
+  taosIgnSignal(SIGTERM);
+  taosIgnSignal(SIGHUP);
+  taosIgnSignal(SIGINT);
+  taosIgnSignal(SIGABRT);
+  taosIgnSignal(SIGBREAK);
+
+  dInfo("shut down signal is %d", signum);
+#ifndef WINDOWS
+  dInfo("sender PID:%d cmdline:%s", ((siginfo_t *)sigInfo)->si_pid,
+        taosGetCmdlineByPID(((siginfo_t *)sigInfo)->si_pid));
+#endif
+
+  dmStop();
+}
 
 static void dmSetSignalHandle() {
+  taosSetSignal(SIGUSR1, dmSetDebugFlag);
+  taosSetSignal(SIGUSR2, dmSetAssert);
   taosSetSignal(SIGTERM, dmStopDnode);
   taosSetSignal(SIGHUP, dmStopDnode);
   taosSetSignal(SIGINT, dmStopDnode);
diff --git a/source/dnode/vnode/src/meta/metaTable.c b/source/dnode/vnode/src/meta/metaTable.c
index 0b00f036de..632675ee1d 100644
--- a/source/dnode/vnode/src/meta/metaTable.c
+++ b/source/dnode/vnode/src/meta/metaTable.c
@@ -1353,6 +1353,10 @@ static int metaUpdateTagIdx(SMeta *pMeta, const SMetaEntry *pCtbEntry) {
     goto end;
   }
 
+  if (stbEntry.stbEntry.schemaTag.pSchema == NULL) {
+    goto end;
+  }
+
   pTagColumn = &stbEntry.stbEntry.schemaTag.pSchema[0];
 
   STagVal tagVal = {.cid = pTagColumn->colId};
diff --git a/source/dnode/vnode/src/tsdb/tsdbCache.c b/source/dnode/vnode/src/tsdb/tsdbCache.c
index 7309ea3407..37fae4f709 100644
--- a/source/dnode/vnode/src/tsdb/tsdbCache.c
+++ b/source/dnode/vnode/src/tsdb/tsdbCache.c
@@ -952,7 +952,10 @@ static int32_t nextRowIterOpen(CacheNextRowIter *pIter, tb_uid_t uid, STsdb *pTs
     SArray *pDelIdxArray = taosArrayInit(32, sizeof(SDelIdx));
 
     code = tsdbReadDelIdx(pDelFReader, pDelIdxArray);
-    if (code) goto _err;
+    if (code) {
+      tsdbDelFReaderClose(&pDelFReader);
+      goto _err;
+    }
 
     SDelIdx *delIdx = taosArraySearch(pDelIdxArray, &(SDelIdx){.suid = suid, .uid = uid}, tCmprDelIdx, TD_EQ);
 
diff --git a/source/util/src/tlog.c b/source/util/src/tlog.c
index cea08e46fe..3825b91c6d 100644
--- a/source/util/src/tlog.c
+++ b/source/util/src/tlog.c
@@ -780,7 +780,7 @@ cmp_end:
   return ret;
 }
 
-bool taosAssertLog(bool condition, const char *file, int32_t line, const char *format, ...) {
+bool taosAssert(bool condition, const char *file, int32_t line, const char *format, ...) {
   if (condition) return false;
 
   const char *flags = "UTL FATAL ";