diff --git a/include/libs/stream/tstream.h b/include/libs/stream/tstream.h
index 1fd2f2bc13..c41834bd82 100644
--- a/include/libs/stream/tstream.h
+++ b/include/libs/stream/tstream.h
@@ -321,8 +321,8 @@ typedef struct {
   int64_t init;
   int64_t step1Start;
   int64_t step2Start;
-  int64_t execStart;
-  int32_t taskUpdateCount;
+  int64_t start;
+  int32_t updateCount;
   int64_t latestUpdateTs;
 } STaskExecStatisInfo;
 
@@ -722,7 +722,7 @@ int32_t streamProcessCheckpointSourceReq(SStreamTask* pTask, SStreamCheckpointSo
 int32_t streamProcessCheckpointReadyMsg(SStreamTask* pTask);
 
 int32_t streamAlignTransferState(SStreamTask* pTask);
-
+int32_t streamBuildAndSendDropTaskMsg(SStreamTask* pTask, int32_t vgId, SStreamTaskId* pTaskId);
 int32_t streamAddCheckpointSourceRspMsg(SStreamCheckpointSourceReq* pReq, SRpcHandleInfo* pRpcInfo, SStreamTask* pTask,
                                         int8_t isSucceed);
 int32_t buildCheckpointSourceRsp(SStreamCheckpointSourceReq* pReq, SRpcHandleInfo* pRpcInfo, SRpcMsg* pMsg,
diff --git a/source/dnode/vnode/src/tq/tq.c b/source/dnode/vnode/src/tq/tq.c
index 6430fee6a7..fc5300b8c7 100644
--- a/source/dnode/vnode/src/tq/tq.c
+++ b/source/dnode/vnode/src/tq/tq.c
@@ -1097,7 +1097,8 @@ int32_t tqProcessTaskScanHistory(STQ* pTq, SRpcMsg* pMsg) {
 
       tqDebug("s-task:%s fill-history task set status to be dropping", id);
 
-      streamMetaUnregisterTask(pMeta, pTask->id.streamId, pTask->id.taskId);
+//      streamMetaUnregisterTask(pMeta, pTask->id.streamId, pTask->id.taskId);
+      streamBuildAndSendDropTaskMsg(pTask, pMeta->vgId, &pTask->id);
       streamMetaReleaseTask(pMeta, pTask);
       return -1;
     }
@@ -1347,10 +1348,14 @@ int32_t tqProcessTaskDropReq(STQ* pTq, int64_t sversion, char* msg, int32_t msgL
 
   // commit the update
   taosWLockLatch(&pTq->pStreamMeta->lock);
+  int32_t numOfTasks = streamMetaGetNumOfTasks(pTq->pStreamMeta);
+  tqDebug("vgId:%d task:0x%x dropped, remain tasks:%d", TD_VID(pTq->pVnode), pReq->taskId, numOfTasks);
+
   if (streamMetaCommit(pTq->pStreamMeta) < 0) {
     // persist to disk
   }
   taosWUnLockLatch(&pTq->pStreamMeta->lock);
+
   return 0;
 }
 
diff --git a/source/dnode/vnode/src/tq/tqSink.c b/source/dnode/vnode/src/tq/tqSink.c
index 106a4cc9b0..e0bae18545 100644
--- a/source/dnode/vnode/src/tq/tqSink.c
+++ b/source/dnode/vnode/src/tq/tqSink.c
@@ -274,7 +274,7 @@ int32_t doBuildAndSendSubmitMsg(SVnode* pVnode, SStreamTask* pTask, SSubmitReq2*
 
   if ((pTask->sinkRecorder.numOfSubmit % 5000) == 0) {
     SSinkTaskRecorder* pRec = &pTask->sinkRecorder;
-    double             el = (taosGetTimestampMs() - pTask->taskExecInfo.execStart) / 1000.0;
+    double             el = (taosGetTimestampMs() - pTask->taskExecInfo.start) / 1000.0;
     tqInfo("s-task:%s vgId:%d write %" PRId64 " blocks (%" PRId64 " rows) in %" PRId64
            " submit into dst table, duration:%.2f Sec.",
            pTask->id.idStr, vgId, pRec->numOfBlocks, pRec->numOfRows, pRec->numOfSubmit, el);
@@ -755,8 +755,8 @@ void tqSinkDataIntoDstTable(SStreamTask* pTask, void* vnode, void* data) {
   int32_t       code = TSDB_CODE_SUCCESS;
   const char*   id = pTask->id.idStr;
 
-  if (pTask->taskExecInfo.execStart == 0) {
-    pTask->taskExecInfo.execStart = taosGetTimestampMs();
+  if (pTask->taskExecInfo.start == 0) {
+    pTask->taskExecInfo.start = taosGetTimestampMs();
   }
 
   bool onlySubmitData = true;
diff --git a/source/libs/stream/src/streamExec.c b/source/libs/stream/src/streamExec.c
index 3a34d941dd..3b3dca7f5f 100644
--- a/source/libs/stream/src/streamExec.c
+++ b/source/libs/stream/src/streamExec.c
@@ -303,7 +303,8 @@ int32_t streamDoTransferStateToStreamTask(SStreamTask* pTask) {
         pTask->id.idStr, pTask->streamTaskId.taskId);
 
     // 1. free it and remove fill-history task from disk meta-store
-    streamMetaUnregisterTask(pMeta, pTask->id.streamId, pTask->id.taskId);
+//    streamMetaUnregisterTask(pMeta, pTask->id.streamId, pTask->id.taskId);
+    streamBuildAndSendDropTaskMsg(pStreamTask, pMeta->vgId, &pTask->id);
 
     // 2. save to disk
     taosWLockLatch(&pMeta->lock);
@@ -365,7 +366,8 @@ int32_t streamDoTransferStateToStreamTask(SStreamTask* pTask) {
   qDebug("s-task:%s fill-history task set status to be dropping, save the state into disk", pTask->id.idStr);
 
   // 4. free it and remove fill-history task from disk meta-store
-  streamMetaUnregisterTask(pMeta, pTask->id.streamId, pTask->id.taskId);
+//  streamMetaUnregisterTask(pMeta, pTask->id.streamId, pTask->id.taskId);
+  streamBuildAndSendDropTaskMsg(pStreamTask, pMeta->vgId, &pTask->id);
 
   // 5. clear the link between fill-history task and stream task info
   pStreamTask->historyTaskId.taskId = 0;
@@ -408,6 +410,8 @@ int32_t streamTransferStateToStreamTask(SStreamTask* pTask) {
 
   if (level == TASK_LEVEL__AGG || level == TASK_LEVEL__SOURCE) {  // do transfer task operator states.
     code = streamDoTransferStateToStreamTask(pTask);
+  } else { // drop fill-history task
+    streamBuildAndSendDropTaskMsg(pTask, pTask->pMeta->vgId, &pTask->id);
   }
 
   return code;
@@ -503,16 +507,12 @@ int32_t streamProcessTranstateBlock(SStreamTask* pTask, SStreamDataBlock* pBlock
     }
   } else {  // non-dispatch task, do task state transfer directly
     streamFreeQitem((SStreamQueueItem*)pBlock);
-    if (level != TASK_LEVEL__SINK) {
-      qDebug("s-task:%s non-dispatch task, start to transfer state directly", id);
-      ASSERT(pTask->info.fillHistory == 1);
-      code = streamTransferStateToStreamTask(pTask);
+    qDebug("s-task:%s non-dispatch task, start to transfer state directly", id);
+    ASSERT(pTask->info.fillHistory == 1);
+    code = streamTransferStateToStreamTask(pTask);
 
-      if (code != TSDB_CODE_SUCCESS) {
-        /*int8_t status = */streamTaskSetSchedStatusInActive(pTask);
-      }
-    } else {
-      qDebug("s-task:%s sink task does not transfer state", id);
+    if (code != TSDB_CODE_SUCCESS) {
+      /*int8_t status = */ streamTaskSetSchedStatusInActive(pTask);
     }
   }
 
diff --git a/source/libs/stream/src/streamMeta.c b/source/libs/stream/src/streamMeta.c
index 8dd93d45fc..6786f36c8e 100644
--- a/source/libs/stream/src/streamMeta.c
+++ b/source/libs/stream/src/streamMeta.c
@@ -47,6 +47,8 @@ struct SMetaHbInfo {
   tmr_h   hbTmr;
   int32_t stopFlag;
   int32_t tickCounter;
+  int32_t hbCount;
+  int64_t hbStart;
 };
 
 SMetaRefMgt gMetaRefMgt;
@@ -333,6 +335,7 @@ void streamMetaCloseImpl(void* arg) {
   taosHashCleanup(pMeta->pTaskBackendUnique);
   taosHashCleanup(pMeta->pUpdateTaskSet);
 
+  taosMemoryFree(pMeta->pHbInfo);
   taosMemoryFree(pMeta->path);
   taosThreadMutexDestroy(&pMeta->backendMutex);
 
@@ -785,7 +788,6 @@ static bool enoughTimeDuration(SMetaHbInfo* pInfo) {
 void metaHbToMnode(void* param, void* tmrId) {
   int64_t rid = *(int64_t*)param;
 
-  SStreamHbMsg hbMsg = {0};
   SStreamMeta* pMeta = taosAcquireRef(streamMetaId, rid);
   if (pMeta == NULL) {
     return;
@@ -803,31 +805,37 @@ void metaHbToMnode(void* param, void* tmrId) {
   if (!pMeta->leader) {
     qInfo("vgId:%d follower not send hb to mnode", pMeta->vgId);
     taosReleaseRef(streamMetaId, rid);
+    pMeta->pHbInfo->hbStart = 0;
     return;
   }
 
+  // set the hb start time
+  if (pMeta->pHbInfo->hbStart == 0) {
+    pMeta->pHbInfo->hbStart = taosGetTimestampMs();
+  }
+
   if (!enoughTimeDuration(pMeta->pHbInfo)) {
     taosTmrReset(metaHbToMnode, META_HB_CHECK_INTERVAL, param, streamEnv.timer, &pMeta->pHbInfo->hbTmr);
     taosReleaseRef(streamMetaId, rid);
     return;
   }
 
-  qInfo("vgId:%d start hb", pMeta->vgId);
+  qDebug("vgId:%d build stream task hb, leader:%d", pMeta->vgId, pMeta->leader);
 
+  SStreamHbMsg hbMsg = {0};
   taosRLockLatch(&pMeta->lock);
   int32_t numOfTasks = streamMetaGetNumOfTasks(pMeta);
 
   SEpSet epset = {0};
   bool   hasValEpset = false;
-
   hbMsg.vgId = pMeta->vgId;
   hbMsg.pTaskStatus = taosArrayInit(numOfTasks, sizeof(STaskStatusEntry));
 
   for (int32_t i = 0; i < numOfTasks; ++i) {
     SStreamTaskId* pId = taosArrayGet(pMeta->pTaskList, i);
-    int64_t        keys[2] = {pId->streamId, pId->taskId};
-    SStreamTask**  pTask = taosHashGet(pMeta->pTasksMap, keys, sizeof(keys));
 
+    int64_t       keys[2] = {pId->streamId, pId->taskId};
+    SStreamTask** pTask = taosHashGet(pMeta->pTasksMap, keys, sizeof(keys));
     if ((*pTask)->info.fillHistory == 1) {
       continue;
     }
@@ -879,10 +887,13 @@ void metaHbToMnode(void* param, void* tmrId) {
     initRpcMsg(&msg, TDMT_MND_STREAM_HEARTBEAT, buf, tlen);
     msg.info.noResp = 1;
 
-    qDebug("vgId:%d, build and send hb to mnode", pMeta->vgId);
+    pMeta->pHbInfo->hbCount += 1;
+
+    qDebug("vgId:%d, build and send hb to mnode, numOfTasks:%d total:%d", pMeta->vgId, hbMsg.numOfTasks,
+           pMeta->pHbInfo->hbCount);
     tmsgSendReq(&epset, &msg);
   } else {
-    qError("vgId:%d no mnd epset", pMeta->vgId);
+    qDebug("vgId:%d no tasks and no mnd epset, not send stream hb to mnode", pMeta->vgId);
   }
 
   taosArrayDestroy(hbMsg.pTaskStatus);
@@ -915,7 +926,9 @@ static bool hasStreamTaskInTimer(SStreamMeta* pMeta) {
 void streamMetaNotifyClose(SStreamMeta* pMeta) {
   int32_t vgId = pMeta->vgId;
 
-  qDebug("vgId:%d notify all stream tasks that the vnode is closing", vgId);
+  qDebug("vgId:%d notify all stream tasks that the vnode is closing. isLeader:%d startHb%" PRId64 ", totalHb:%d", vgId,
+         pMeta->leader, pMeta->pHbInfo->hbStart, pMeta->pHbInfo->hbCount);
+
   taosWLockLatch(&pMeta->lock);
 
   void* pIter = NULL;
diff --git a/source/libs/stream/src/streamTask.c b/source/libs/stream/src/streamTask.c
index 01318d89cd..23ace63d18 100644
--- a/source/libs/stream/src/streamTask.c
+++ b/source/libs/stream/src/streamTask.c
@@ -277,7 +277,20 @@ static void freeUpstreamItem(void* p) {
 void tFreeStreamTask(SStreamTask* pTask) {
   int32_t taskId = pTask->id.taskId;
 
-  qDebug("free s-task:0x%x, %p, state:%p", taskId, pTask, pTask->pState);
+  STaskExecStatisInfo* pStatis = &pTask->taskExecInfo;
+
+  qDebug("start to free s-task:0x%x, %p, state:%p, status:%s", taskId, pTask, pTask->pState,
+         streamGetTaskStatusStr(pTask->status.taskStatus));
+
+  qDebug("s-task:0x%x exec info: create:%" PRId64 ", init:%" PRId64 ", start:%" PRId64
+         ", updateCount:%d latestUpdate:%" PRId64 ", latestCheckPoint:%" PRId64 ", ver:%" PRId64
+         " nextProcessVer:%" PRId64,
+         taskId, pStatis->created, pStatis->init, pStatis->start, pStatis->updateCount, pStatis->latestUpdateTs,
+         pTask->chkInfo.checkpointId, pTask->chkInfo.checkpointVer, pTask->chkInfo.nextProcessVer);
+
+  if (pStatis->created == 0 || pStatis->init == 0 || pStatis->start == 0) {
+    int32_t k = 1;
+  }
 
   // remove the ref by timer
   while (pTask->status.timerActive > 0) {
@@ -396,7 +409,7 @@ int32_t streamTaskInit(SStreamTask* pTask, SStreamMeta* pMeta, SMsgCb* pMsgCb, i
   TdThreadMutexAttr attr = {0};
   int code = taosThreadMutexAttrInit(&attr);
   if (code != 0) {
-    qError("s-task:%s init mutex attr failed, code:%s", pTask->id.idStr, tstrerror(code));
+    qError("s-task:%s initElapsed mutex attr failed, code:%s", pTask->id.idStr, tstrerror(code));
     return code;
   }
 
@@ -524,9 +537,8 @@ int32_t streamTaskStop(SStreamTask* pTask) {
     taosMsleep(100);
   }
 
-  pTask->taskExecInfo.init = 0;
   int64_t el = taosGetTimestampMs() - st;
-  qDebug("vgId:%d s-task:%s is closed in %" PRId64 " ms, and reset init ts", pMeta->vgId, pTask->id.idStr, el);
+  qDebug("vgId:%d s-task:%s is closed in %" PRId64 " ms", pMeta->vgId, pTask->id.idStr, el);
   return 0;
 }
 
@@ -556,9 +568,9 @@ int32_t doUpdateTaskEpset(SStreamTask* pTask, int32_t nodeId, SEpSet* pEpSet) {
 int32_t streamTaskUpdateEpsetInfo(SStreamTask* pTask, SArray* pNodeList) {
   STaskExecStatisInfo* p = &pTask->taskExecInfo;
   qDebug("s-task:%s update task nodeEp epset, update count:%d, prevTs:%"PRId64, pTask->id.idStr,
-          p->taskUpdateCount + 1, p->latestUpdateTs);
+          p->updateCount + 1, p->latestUpdateTs);
 
-  p->taskUpdateCount += 1;
+  p->updateCount += 1;
   p->latestUpdateTs = taosGetTimestampMs();
 
   for (int32_t i = 0; i < taosArrayGetSize(pNodeList); ++i) {
@@ -615,3 +627,25 @@ int8_t streamTaskSetSchedStatusInActive(SStreamTask* pTask) {
 
   return status;
 }
+
+int32_t streamBuildAndSendDropTaskMsg(SStreamTask* pTask, int32_t vgId, SStreamTaskId* pTaskId) {
+  SVDropStreamTaskReq *pReq = rpcMallocCont(sizeof(SVDropStreamTaskReq));
+  if (pReq == NULL) {
+    terrno = TSDB_CODE_OUT_OF_MEMORY;
+    return -1;
+  }
+
+  pReq->head.vgId = vgId;
+  pReq->taskId = pTaskId->taskId;
+  pReq->streamId = pTaskId->streamId;
+
+  SRpcMsg msg = {.msgType = TDMT_STREAM_TASK_DROP, .pCont = pReq, .contLen = sizeof(SVDropStreamTaskReq)};
+  int32_t code = tmsgPutToQueue(pTask->pMsgCb, WRITE_QUEUE, &msg);
+  if (code != TSDB_CODE_SUCCESS) {
+    qError("vgId:%d failed to send drop task:0x%x msg, code:%s", vgId, pTaskId->taskId, tstrerror(code));
+    return code;
+  }
+
+  qDebug("vgId:%d build and send drop table:0x%x msg", vgId, pTaskId->taskId);
+  return code;
+}