diff --git a/include/libs/stream/tstream.h b/include/libs/stream/tstream.h
index 0fa32acfbb..1b6202f09b 100644
--- a/include/libs/stream/tstream.h
+++ b/include/libs/stream/tstream.h
@@ -789,6 +789,7 @@ void    streamMetaClearSetUpdateTaskListComplete(SStreamMeta* pMeta);
 bool    streamMetaInitUpdateTaskList(SStreamMeta* pMeta, int32_t transId);
 
 void    streamMetaRLock(SStreamMeta* pMeta);
+int32_t streamMetaTryRlock(SStreamMeta* pMeta);
 void    streamMetaRUnLock(SStreamMeta* pMeta);
 void    streamMetaWLock(SStreamMeta* pMeta);
 void    streamMetaWUnLock(SStreamMeta* pMeta);
diff --git a/source/dnode/mnode/impl/src/mndConfig.c b/source/dnode/mnode/impl/src/mndConfig.c
index 099fff7aee..1e69ae2b5a 100644
--- a/source/dnode/mnode/impl/src/mndConfig.c
+++ b/source/dnode/mnode/impl/src/mndConfig.c
@@ -299,6 +299,8 @@ _OVER:
   }
   sdbRelease(pMnode->pSdb, vObj);
   cfgArrayCleanUp(array);
+
+  tFreeSConfigReq(&configReq);
   return code;
 }
 
diff --git a/source/dnode/vnode/src/tq/tqSink.c b/source/dnode/vnode/src/tq/tqSink.c
index 4c2d0d7531..239a8e65b5 100644
--- a/source/dnode/vnode/src/tq/tqSink.c
+++ b/source/dnode/vnode/src/tq/tqSink.c
@@ -1418,6 +1418,7 @@ int32_t handleResultBlockMsg(SStreamTask* pTask, SSDataBlock* pDataBlock, int32_
   code = setDstTableDataUid(pVnode, pTask, pDataBlock, stbFullName, &tbData);
   if (code != TSDB_CODE_SUCCESS) {
     tqError("vgId:%d s-task:%s dst-table not exist, stb:%s discard stream results", vgId, id, stbFullName);
+    tDestroySubmitReq(&submitReq, TSDB_MSG_FLG_ENCODE);
     return code;
   }
 
@@ -1429,12 +1430,14 @@ int32_t handleResultBlockMsg(SStreamTask* pTask, SSDataBlock* pDataBlock, int32_
       tbData.pCreateTbReq = NULL;
     }
 
+    tDestroySubmitReq(&submitReq, TSDB_MSG_FLG_ENCODE);
     return code;
   }
 
   void* p = taosArrayPush(submitReq.aSubmitTbData, &tbData);
   if (p == NULL) {
     tqDebug("vgId:%d, s-task:%s failed to build submit msg, code:%s, data lost", vgId, id, tstrerror(terrno));
+    tDestroySubmitReq(&submitReq, TSDB_MSG_FLG_ENCODE);
     return terrno;
   }
 
diff --git a/source/dnode/vnode/src/tq/tqStreamTask.c b/source/dnode/vnode/src/tq/tqStreamTask.c
index 7c65f805e9..d9aec27759 100644
--- a/source/dnode/vnode/src/tq/tqStreamTask.c
+++ b/source/dnode/vnode/src/tq/tqStreamTask.c
@@ -148,9 +148,13 @@ static void doStartScanWal(void* param, void* tmrId) {
     return;
   }
 
-  streamMetaRLock(pMeta);
-  numOfTasks = taosArrayGetSize(pMeta->pTaskList);
-  streamMetaRUnLock(pMeta);
+  code = streamMetaTryRlock(pMeta);
+  if (code == 0) {
+    numOfTasks = taosArrayGetSize(pMeta->pTaskList);
+    streamMetaRUnLock(pMeta);
+  } else {
+    numOfTasks = 0;
+  }
 
   if (numOfTasks == 0) {
     goto _end;
@@ -169,7 +173,6 @@ static void doStartScanWal(void* param, void* tmrId) {
   }
 
 _end:
-
   streamTmrStart(doStartScanWal, SCAN_WAL_IDLE_DURATION, pParam, pTimer, &pMeta->scanInfo.scanTimer, vgId, "scan-wal");
   tqDebug("vgId:%d scan-wal will start in %dms", vgId, SCAN_WAL_IDLE_DURATION*SCAN_WAL_WAIT_COUNT);
 
diff --git a/source/libs/stream/src/streamCheckpoint.c b/source/libs/stream/src/streamCheckpoint.c
index 387010d0a6..eb8f2c741a 100644
--- a/source/libs/stream/src/streamCheckpoint.c
+++ b/source/libs/stream/src/streamCheckpoint.c
@@ -1585,10 +1585,13 @@ int32_t streamTaskSendNegotiateChkptIdMsg(SStreamTask* pTask) {
     pTask->pBackend = NULL;
   }
 
+  streamMetaWLock(pTask->pMeta);
   if (pTask->exec.pExecutor != NULL) {
     qDestroyTask(pTask->exec.pExecutor);
     pTask->exec.pExecutor = NULL;
   }
+  streamMetaWUnLock(pTask->pMeta);
+
   return 0;
 }
 
diff --git a/source/libs/stream/src/streamHb.c b/source/libs/stream/src/streamHb.c
index 90ebd47ac6..ca5b6630fd 100644
--- a/source/libs/stream/src/streamHb.c
+++ b/source/libs/stream/src/streamHb.c
@@ -363,13 +363,24 @@ void streamMetaHbToMnode(void* param, void* tmrId) {
     pMeta->pHbInfo->hbStart = taosGetTimestampMs();
   }
 
-  streamMetaRLock(pMeta);
-  code = streamMetaSendHbHelper(pMeta);
-  if (code) {
-    stError("vgId:%d failed to send hmMsg to mnode, try again in 5s, code:%s", pMeta->vgId, tstrerror(code));
+  // NOTE: stream task in restart procedure. not generate the hb now, try to acquire the lock may cause stuck this timer.
+  int32_t count = 30;
+  bool    send = false;
+  while ((--count) >= 0) {
+    int32_t ret = streamMetaTryRlock(pMeta);
+    if (ret != 0) {
+      taosMsleep(10);
+    } else {
+      send = true;
+      code = streamMetaSendHbHelper(pMeta);
+      streamMetaRUnLock(pMeta);
+      break;
+    }
   }
 
-  streamMetaRUnLock(pMeta);
+  if (!send) {
+    stError("vgId:%d failed to send hmMsg to mnode, retry again in 5s, code:%s", pMeta->vgId, tstrerror(code));
+  }
 
   streamTmrStart(streamMetaHbToMnode, META_HB_CHECK_INTERVAL, param, streamTimer, &pMeta->pHbInfo->hbTmr, pMeta->vgId,
                  "meta-hb-tmr");
diff --git a/source/libs/stream/src/streamQueue.c b/source/libs/stream/src/streamQueue.c
index d8a1c68c07..7c7ef83d6d 100644
--- a/source/libs/stream/src/streamQueue.c
+++ b/source/libs/stream/src/streamQueue.c
@@ -144,21 +144,11 @@ void streamQueueNextItemInSourceQ(SStreamQueue* pQueue, SStreamQueueItem** pItem
 
   // let's try the ordinary input q
   pQueue->qItem = NULL;
-  int32_t code = taosGetQitem(pQueue->qall, &pQueue->qItem);
-  if (code) {
-    stError("s-task:%s failed to get item in inputq, code:%s", id, tstrerror(code));
-  }
+  int32_t num = taosGetQitem(pQueue->qall, &pQueue->qItem);
 
   if (pQueue->qItem == NULL) {
-    code = taosReadAllQitems(pQueue->pQueue, pQueue->qall);
-    if (code) {
-      stError("s-task:%s failed to get all items in inputq, code:%s", id, tstrerror(code));
-    }
-
-    code = taosGetQitem(pQueue->qall, &pQueue->qItem);
-    if (code) {
-      stError("s-task:%s failed to get item in inputq, code:%s", id, tstrerror(code));
-    }
+    num = taosReadAllQitems(pQueue->pQueue, pQueue->qall);
+    num = taosGetQitem(pQueue->qall, &pQueue->qItem);
   }
 
   *pItem = streamQueueCurItem(pQueue);
diff --git a/source/libs/stream/src/streamUtil.c b/source/libs/stream/src/streamUtil.c
index 4c481e6041..11e291c876 100644
--- a/source/libs/stream/src/streamUtil.c
+++ b/source/libs/stream/src/streamUtil.c
@@ -54,6 +54,15 @@ void streamMetaRUnLock(SStreamMeta* pMeta) {
   }
 }
 
+int32_t streamMetaTryRlock(SStreamMeta* pMeta) {
+  int32_t code = taosThreadRwlockTryRdlock(&pMeta->lock);
+  if (code) {
+    stError("vgId:%d try meta-rlock failed, code:%s", pMeta->vgId, tstrerror(code));
+  }
+
+  return code;
+}
+
 void streamMetaWLock(SStreamMeta* pMeta) {
   //  stTrace("vgId:%d meta-wlock", pMeta->vgId);
   int32_t code = taosThreadRwlockWrlock(&pMeta->lock);