diff --git a/include/libs/stream/tstream.h b/include/libs/stream/tstream.h
index 0a541a34ab..6564bcc769 100644
--- a/include/libs/stream/tstream.h
+++ b/include/libs/stream/tstream.h
@@ -75,7 +75,7 @@ typedef enum ETaskStatus {
   TASK_STATUS__HALT,          // pause, but not be manipulated by user command
   TASK_STATUS__PAUSE,         // pause
   TASK_STATUS__CK,            // stream task is in checkpoint status, no data are allowed to put into inputQ anymore
-  TASK_STATUS_STREAM_SCAN_HISTORY,
+  TASK_STATUS__STREAM_SCAN_HISTORY,
 } ETaskStatus;
 
 enum {
@@ -720,6 +720,7 @@ bool    streamTaskIsIdle(const SStreamTask* pTask);
 
 char*       createStreamTaskIdStr(int64_t streamId, int32_t taskId);
 ETaskStatus streamTaskGetStatus(const SStreamTask* pTask, char** pStr);
+const char* streamTaskGetStatusStr(ETaskStatus status);
 void        streamTaskResetStatus(SStreamTask* pTask);
 void        streamTaskSetStatusReady(SStreamTask* pTask);
 
@@ -755,8 +756,6 @@ int32_t streamQueueGetNumOfItems(const SStreamQueue* pQueue);
 
 // common
 int32_t     streamRestoreParam(SStreamTask* pTask);
-int32_t     streamSetStatusUnint(SStreamTask* pTask);
-const char* streamGetTaskStatusStr(int32_t status);
 void        streamTaskPause(SStreamTask* pTask, SStreamMeta* pMeta);
 void        streamTaskResume(SStreamTask* pTask, SStreamMeta* pMeta);
 void        streamTaskResumeFromHalt(SStreamTask* pTask);
diff --git a/source/dnode/mnode/impl/src/mndStream.c b/source/dnode/mnode/impl/src/mndStream.c
index 0a9e3c5336..7e254e5efb 100644
--- a/source/dnode/mnode/impl/src/mndStream.c
+++ b/source/dnode/mnode/impl/src/mndStream.c
@@ -1183,7 +1183,7 @@ static int32_t mndProcessStreamDoCheckpoint(SRpcMsg *pReq) {
 
       if (pEntry->status != TASK_STATUS__READY) {
         mDebug("s-task:0x%" PRIx64 "-0x%x (nodeId:%d) status:%s not ready, checkpoint msg not issued",
-              pEntry->id.streamId, (int32_t)pEntry->id.taskId, 0, streamGetTaskStatusStr(pEntry->status));
+              pEntry->id.streamId, (int32_t)pEntry->id.taskId, 0, streamTaskGetStatusStr(pEntry->status));
         ready = false;
         break;
       }
@@ -1567,7 +1567,7 @@ static int32_t mndRetrieveStreamTask(SRpcMsg *pReq, SShowObj *pShow, SSDataBlock
           continue;
         }
 
-        const char* pStatus = streamGetTaskStatusStr(pe->status);
+        const char* pStatus = streamTaskGetStatusStr(pe->status);
         STR_TO_VARSTR(status, pStatus);
 
         // status
@@ -2615,7 +2615,7 @@ int32_t mndProcessStreamHb(SRpcMsg *pReq) {
 
     pEntry->status = p->status;
     if (p->status != TASK_STATUS__READY) {
-      mDebug("received s-task:0x%"PRIx64" not in ready status:%s", p->id.taskId, streamGetTaskStatusStr(p->status));
+      mDebug("received s-task:0x%"PRIx64" not in ready status:%s", p->id.taskId, streamTaskGetStatusStr(p->status));
     }
   }
 
diff --git a/source/dnode/vnode/src/tq/tq.c b/source/dnode/vnode/src/tq/tq.c
index 750a9d942a..8f7657f98c 100644
--- a/source/dnode/vnode/src/tq/tq.c
+++ b/source/dnode/vnode/src/tq/tq.c
@@ -1446,7 +1446,7 @@ int32_t tqProcessTaskDropReq(STQ* pTq, char* msg, int32_t msgLen) {
   SStreamTask* pTask = streamMetaAcquireTask(pMeta, pReq->streamId, pReq->taskId);
   if (pTask != NULL) {
     // drop the related fill-history task firstly
-    if (pTask->hTaskInfo.id.taskId != 0) {
+    if (HAS_RELATED_FILLHISTORY_TASK(pTask)) {
       STaskId* pHTaskId = &pTask->hTaskInfo.id;
       streamMetaUnregisterTask(pMeta, pHTaskId->streamId, pHTaskId->taskId);
       tqDebug("vgId:%d drop fill-history task:0x%x dropped firstly", vgId, (int32_t)pHTaskId->taskId);
@@ -1486,7 +1486,7 @@ int32_t tqProcessTaskPauseReq(STQ* pTq, int64_t sversion, char* msg, int32_t msg
   streamTaskPause(pTask, pMeta);
 
   SStreamTask* pHistoryTask = NULL;
-  if (pTask->hTaskInfo.id.taskId != 0) {
+  if (HAS_RELATED_FILLHISTORY_TASK(pTask)) {
     pHistoryTask = streamMetaAcquireTask(pMeta, pTask->hTaskInfo.id.streamId, pTask->hTaskInfo.id.taskId);
     if (pHistoryTask == NULL) {
       tqError("vgId:%d process pause req, failed to acquire fill-history task:0x%" PRIx64
@@ -1868,7 +1868,7 @@ int32_t tqProcessTaskUpdateReq(STQ* pTq, SRpcMsg* pMsg) {
   streamTaskResetStatus(pTask);
 
   SStreamTask** ppHTask = NULL;
-  if (pTask->hTaskInfo.id.taskId != 0) {
+  if (HAS_RELATED_FILLHISTORY_TASK(pTask)) {
     ppHTask = (SStreamTask**)taosHashGet(pMeta->pTasksMap, &pTask->hTaskInfo.id, sizeof(pTask->hTaskInfo.id));
     if (ppHTask == NULL || *ppHTask == NULL) {
       tqError("vgId:%d failed to acquire fill-history task:0x%x when handling update, it may have been dropped already",
diff --git a/source/libs/stream/src/streamExec.c b/source/libs/stream/src/streamExec.c
index 346f6cefcb..8c37e785dd 100644
--- a/source/libs/stream/src/streamExec.c
+++ b/source/libs/stream/src/streamExec.c
@@ -308,7 +308,7 @@ int32_t streamDoTransferStateToStreamTask(SStreamTask* pTask) {
            pStreamTask->id.idStr);
   }
 
-  int8_t status = streamTaskGetStatus(pStreamTask, NULL);
+  ETaskStatus status = streamTaskGetStatus(pStreamTask, NULL);
   ASSERT(((status == TASK_STATUS__DROPPING) || (pStreamTask->hTaskInfo.id.taskId == pTask->id.taskId)) &&
          pTask->status.appendTranstateBlock == true);
 
@@ -352,7 +352,7 @@ int32_t streamDoTransferStateToStreamTask(SStreamTask* pTask) {
 
   // 3. resume the state of stream task, after this function, the stream task will run immidately. But it can not be
   // pause, since the pause allowed attribute is not set yet.
-  streamTaskResumeFromHalt(pStreamTask);
+  streamTaskResumeFromHalt(pStreamTask);  // todo refactor: use streamTaskResume.
 
   stDebug("s-task:%s fill-history task set status to be dropping, save the state into disk", pTask->id.idStr);
 
diff --git a/source/libs/stream/src/streamMeta.c b/source/libs/stream/src/streamMeta.c
index ee4f1e2340..206f1fcfc6 100644
--- a/source/libs/stream/src/streamMeta.c
+++ b/source/libs/stream/src/streamMeta.c
@@ -348,6 +348,7 @@ void streamMetaCloseImpl(void* arg) {
   stDebug("end to close stream meta");
 }
 
+// todo let's check the status for each task
 int32_t streamMetaSaveTask(SStreamMeta* pMeta, SStreamTask* pTask) {
   void*   buf = NULL;
   int32_t len;
diff --git a/source/libs/stream/src/streamStart.c b/source/libs/stream/src/streamStart.c
index 58ea042079..66865c8e25 100644
--- a/source/libs/stream/src/streamStart.c
+++ b/source/libs/stream/src/streamStart.c
@@ -42,7 +42,8 @@ int32_t streamTaskSetReady(SStreamTask* pTask) {
   int32_t     numOfDowns = streamTaskGetNumOfDownstream(pTask);
   ETaskStatus status = streamTaskGetStatus(pTask, &p);
 
-  if (status == TASK_STATUS__SCAN_HISTORY && pTask->info.taskLevel != TASK_LEVEL__SOURCE) {
+  if ((status == TASK_STATUS__SCAN_HISTORY || status == TASK_STATUS__STREAM_SCAN_HISTORY) &&
+      pTask->info.taskLevel != TASK_LEVEL__SOURCE) {
     pTask->numOfWaitingUpstream = taosArrayGetSize(pTask->upstreamInfo.pList);
     stDebug("s-task:%s level:%d task wait for %d upstream tasks complete scan-history procedure, status:%s",
            pTask->id.idStr, pTask->info.taskLevel, pTask->numOfWaitingUpstream, p);
@@ -92,16 +93,20 @@ static int32_t doStartScanHistoryTask(SStreamTask* pTask) {
 }
 
 int32_t streamTaskStartScanHistory(SStreamTask* pTask) {
-  ASSERT(pTask->status.downstreamReady == 1 && streamTaskGetStatus(pTask, NULL) == TASK_STATUS__SCAN_HISTORY);
+  int32_t level = pTask->info.taskLevel;
+  ETaskStatus status = streamTaskGetStatus(pTask, NULL);
 
-  if (pTask->info.taskLevel == TASK_LEVEL__SOURCE) {
+  ASSERT(pTask->status.downstreamReady == 1 &&
+         ((status == TASK_STATUS__SCAN_HISTORY) || (status == TASK_STATUS__STREAM_SCAN_HISTORY)));
+
+  if (level == TASK_LEVEL__SOURCE) {
     return doStartScanHistoryTask(pTask);
-  } else if (pTask->info.taskLevel == TASK_LEVEL__AGG) {
+  } else if (level == TASK_LEVEL__AGG) {
     if (pTask->info.fillHistory) {
       streamSetParamForScanHistory(pTask);
       streamTaskEnablePause(pTask);
     }
-  } else if (pTask->info.taskLevel == TASK_LEVEL__SINK) {
+  } else if (level == TASK_LEVEL__SINK) {
     stDebug("s-task:%s sink task do nothing to handle scan-history", pTask->id.idStr);
   }
 
@@ -292,13 +297,13 @@ int32_t onScanhistoryTaskReady(SStreamTask* pTask) {
 
   char* p = NULL;
   ETaskStatus status = streamTaskGetStatus(pTask, &p);
-  ASSERT(status == TASK_STATUS__SCAN_HISTORY);
+  ASSERT(status == TASK_STATUS__SCAN_HISTORY || status == TASK_STATUS__STREAM_SCAN_HISTORY);
 
   stDebug("s-task:%s enter into scan-history data stage, status:%s", id, p);
   streamTaskStartScanHistory(pTask);
 
   // start the related fill-history task, when current task is ready
-  if (pTask->hTaskInfo.id.taskId != 0) {
+  if (HAS_RELATED_FILLHISTORY_TASK(pTask)) {
     streamLaunchFillHistoryTask(pTask);
   }
 
@@ -516,7 +521,7 @@ int32_t streamProcessScanHistoryFinishReq(SStreamTask* pTask, SStreamScanHistory
   char*       p = NULL;
   ETaskStatus status = streamTaskGetStatus(pTask, &p);
 
-  if (status != TASK_STATUS__SCAN_HISTORY) {
+  if (status != TASK_STATUS__SCAN_HISTORY && status != TASK_STATUS__STREAM_SCAN_HISTORY) {
     stError("s-task:%s not in scan-history status, status:%s return upstream:0x%x scan-history finish directly",
            id, p, pReq->upstreamTaskId);
 
@@ -571,7 +576,9 @@ int32_t streamProcessScanHistoryFinishReq(SStreamTask* pTask, SStreamScanHistory
 }
 
 int32_t streamProcessScanHistoryFinishRsp(SStreamTask* pTask) {
-  ASSERT(/*pTask->status.taskStatus*/ streamTaskGetStatus(pTask, NULL) == TASK_STATUS__SCAN_HISTORY);
+  ETaskStatus status = streamTaskGetStatus(pTask, NULL);
+
+  ASSERT(status == TASK_STATUS__SCAN_HISTORY || status == TASK_STATUS__STREAM_SCAN_HISTORY);
   SStreamMeta* pMeta = pTask->pMeta;
 
   // execute in the scan history complete call back msg, ready to process data from inputQ
@@ -939,9 +946,7 @@ void streamTaskCheckDownstream(SStreamTask* pTask) {
   doCheckDownstreamStatus(pTask);
 }
 
-// normal -> pause, pause/stop/dropping -> pause, halt -> pause, scan-history -> pause
 void streamTaskPause(SStreamTask* pTask, SStreamMeta* pMeta) {
-  int64_t st = taosGetTimestampMs();
 #if 0
   int8_t status = pTask->status.taskStatus;
   if (status == TASK_STATUS__DROPPING) {
@@ -1013,9 +1018,7 @@ void streamTaskPause(SStreamTask* pTask, SStreamMeta* pMeta) {
     qKillTask(pExecutor, TSDB_CODE_SUCCESS);
   }
 
-  int64_t el = taosGetTimestampMs() - st;
-  stDebug("vgId:%d s-task:%s set pause flag, prev:%s, pause elapsed time:%dms", pMeta->vgId, pTask->id.idStr,
-         streamGetTaskStatusStr(pTask->status.keepTaskStatus), (int32_t)el);
+  stDebug("vgId:%d s-task:%s set pause flag and pause task", pMeta->vgId, pTask->id.idStr);
 }
 
 void streamTaskResume(SStreamTask* pTask, SStreamMeta* pMeta) {
diff --git a/source/libs/stream/src/streamTask.c b/source/libs/stream/src/streamTask.c
index fdcfcfa9a9..1d12401d12 100644
--- a/source/libs/stream/src/streamTask.c
+++ b/source/libs/stream/src/streamTask.c
@@ -732,20 +732,6 @@ void streamTaskSetRetryInfoForLaunch(SHistoryTaskInfo* pInfo) {
   pInfo->retryTimes += 1;
 }
 
-const char* streamGetTaskStatusStr(int32_t status) {
-  switch(status) {
-    case TASK_STATUS__READY: return "normal";
-    case TASK_STATUS__SCAN_HISTORY: return "scan-history";
-    case TASK_STATUS__HALT: return "halt";
-    case TASK_STATUS__PAUSE: return "paused";
-    case TASK_STATUS__CK: return "check-point";
-    case TASK_STATUS__DROPPING: return "dropping";
-    case TASK_STATUS__STOP: return "stop";
-    case TASK_STATUS__UNINIT: return "uninitialized";
-    default:return "";
-  }
-}
-
 void streamTaskStatusInit(STaskStatusEntry* pEntry, const SStreamTask* pTask) {
   pEntry->id.streamId = pTask->id.streamId;
   pEntry->id.taskId = pTask->id.taskId;
diff --git a/source/libs/stream/src/streamTaskSm.c b/source/libs/stream/src/streamTaskSm.c
index 49a434af94..addd563388 100644
--- a/source/libs/stream/src/streamTaskSm.c
+++ b/source/libs/stream/src/streamTaskSm.c
@@ -29,10 +29,10 @@ SStreamTaskState StreamTaskStatusList[9] = {
     {.state = TASK_STATUS__HALT, .name = "halt"},
     {.state = TASK_STATUS__PAUSE, .name = "paused"},
     {.state = TASK_STATUS__CK, .name = "checkpoint"},
-    {.state = TASK_STATUS_STREAM_SCAN_HISTORY, .name = "stream-scan-history"},
+    {.state = TASK_STATUS__STREAM_SCAN_HISTORY, .name = "stream-scan-history"},
 };
 
-SStreamEventInfo StreamTaskEventList[10] = {
+SStreamEventInfo StreamTaskEventList[11] = {
     {},  // dummy event, place holder
     {.event = TASK_EVENT_INIT, .name = "initialize"},
     {.event = TASK_EVENT_INIT_SCANHIST, .name = "scan-history-initialize"},
@@ -43,6 +43,7 @@ SStreamEventInfo StreamTaskEventList[10] = {
     {.event = TASK_EVENT_PAUSE, .name = "pausing"},
     {.event = TASK_EVENT_RESUME, .name = "resuming"},
     {.event = TASK_EVENT_HALT, .name = "halting"},
+    {.event = TASK_EVENT_DROPPING, .name = "dropping"},
 };
 
 static TdThreadOnce streamTaskStateMachineInit = PTHREAD_ONCE_INIT;
@@ -173,35 +174,45 @@ void* streamDestroyStateMachine(SStreamTaskSM* pSM) {
 }
 
 int32_t streamTaskHandleEvent(SStreamTaskSM* pSM, EStreamTaskEvent event) {
-  taosThreadMutexLock(&pSM->pTask->lock);
+  SStreamTask* pTask = pSM->pTask;
+
+  taosThreadMutexLock(&pTask->lock);
 
   STaskStateTrans* pTrans = streamTaskFindTransform(pSM, event);
-  stDebug("s-task:%s start to handle event:%s, state:%s", pSM->pTask->id.idStr, StreamTaskEventList[event].name,
+  stDebug("s-task:%s start to handle event:%s, state:%s", pTask->id.idStr, StreamTaskEventList[event].name,
           pSM->current.name);
 
   if (pTrans->attachEvent.event != 0) {
-    attachEvent(pSM->pTask, &pTrans->attachEvent);
-    taosThreadMutexUnlock(&pSM->pTask->lock);
+    attachEvent(pTask, &pTrans->attachEvent);
+    taosThreadMutexUnlock(&pTask->lock);
 
     while (1) {
       // wait for the task to be here
-      ETaskStatus s = streamTaskGetStatus(pSM->pTask, NULL);
+      taosThreadMutexLock(&pTask->lock);
+      ETaskStatus s = streamTaskGetStatus(pTask, NULL);
+      taosThreadMutexUnlock(&pTask->lock);
+
       if (s == pTrans->attachEvent.status) {
         return TSDB_CODE_SUCCESS;
       } else {// this event has been handled already
-        stDebug("s-task:%s not handle event:%s yet, wait for 100ms and recheck", pSM->pTask->id.idStr,
+        stDebug("s-task:%s not handle event:%s yet, wait for 100ms and recheck", pTask->id.idStr,
                 StreamTaskEventList[event].name);
         taosMsleep(100);
       }
     }
 
   } else {
-    ASSERT(pSM->pActiveTrans == NULL);
+    if (pSM->pActiveTrans != NULL) {
+      ASSERT(!pSM->pActiveTrans->autoInvokeEndFn);
+      stWarn("s-task:%s status:%s handle event:%s is interrupted, handle the new event:%s", pTask->id.idStr,
+             pSM->current.name, StreamTaskEventList[pSM->pActiveTrans->event].name, StreamTaskEventList[event].name);
+    }
+
     pSM->pActiveTrans = pTrans;
     pSM->startTs = taosGetTimestampMs();
-    taosThreadMutexUnlock(&pSM->pTask->lock);
+    taosThreadMutexUnlock(&pTask->lock);
 
-    int32_t code = pTrans->pAction(pSM->pTask);
+    int32_t code = pTrans->pAction(pTask);
     // todo handle error code;
 
     if (pTrans->autoInvokeEndFn) {
@@ -273,6 +284,10 @@ ETaskStatus streamTaskGetStatus(const SStreamTask* pTask, char** pStr) {
   return s.state;
 }
 
+const char* streamTaskGetStatusStr(ETaskStatus status) {
+  return StreamTaskStatusList[status].name;
+}
+
 void streamTaskResetStatus(SStreamTask* pTask) {
   SStreamTaskSM* pSM = pTask->status.pSM;
   pSM->current = StreamTaskStatusList[TASK_STATUS__UNINIT];
@@ -304,6 +319,9 @@ STaskStateTrans createStateTransform(ETaskStatus current, ETaskStatus next, EStr
 
   if (pEventInfo != NULL) {
     trans.attachEvent = *pEventInfo;
+  } else {
+    trans.attachEvent.event = 0;
+    trans.attachEvent.status = 0;
   }
 
   trans.pAction = (fn != NULL) ? fn : dummyFn;
@@ -329,15 +347,16 @@ void doInitStateTransferTable(void) {
                                streamTaskInitStatus, onScanhistoryTaskReady, false, false);
   taosArrayPush(streamTaskSMTrans, &trans);
 
-  trans = createStateTransform(TASK_STATUS__UNINIT, TASK_STATUS_STREAM_SCAN_HISTORY, TASK_EVENT_INIT_STREAM_SCANHIST,
+  trans = createStateTransform(TASK_STATUS__UNINIT, TASK_STATUS__STREAM_SCAN_HISTORY, TASK_EVENT_INIT_STREAM_SCANHIST,
                                streamTaskInitStatus, onScanhistoryTaskReady, false, false);
   taosArrayPush(streamTaskSMTrans, &trans);
 
+  // scan-history related event
   trans = createStateTransform(TASK_STATUS__SCAN_HISTORY, TASK_STATUS__READY, TASK_EVENT_SCANHIST_DONE,
                                streamTaskSetReadyForWal, NULL, NULL, true);
   taosArrayPush(streamTaskSMTrans, &trans);
 
-  trans = createStateTransform(TASK_STATUS_STREAM_SCAN_HISTORY, TASK_STATUS__READY, TASK_EVENT_SCANHIST_DONE,
+  trans = createStateTransform(TASK_STATUS__STREAM_SCAN_HISTORY, TASK_STATUS__READY, TASK_EVENT_SCANHIST_DONE,
                                streamTaskSetReadyForWal, NULL, NULL, true);
   taosArrayPush(streamTaskSMTrans, &trans);
 
@@ -347,7 +366,7 @@ void doInitStateTransferTable(void) {
   taosArrayPush(streamTaskSMTrans, &trans);
 
   SAttachedEventInfo info = {.status = TASK_STATUS__READY, .event = TASK_EVENT_HALT};
-  trans = createStateTransform(TASK_STATUS_STREAM_SCAN_HISTORY, TASK_STATUS__HALT, TASK_EVENT_HALT, NULL,
+  trans = createStateTransform(TASK_STATUS__STREAM_SCAN_HISTORY, TASK_STATUS__HALT, TASK_EVENT_HALT, NULL,
                                streamTaskKeepCurrentVerInWal, &info, true);
   taosArrayPush(streamTaskSMTrans, &trans);
 
@@ -375,7 +394,7 @@ void doInitStateTransferTable(void) {
   taosArrayPush(streamTaskSMTrans, &trans);
 
   info = (SAttachedEventInfo){.status = TASK_STATUS__READY, .event = TASK_EVENT_PAUSE};
-  trans = createStateTransform(TASK_STATUS_STREAM_SCAN_HISTORY, TASK_STATUS__PAUSE, TASK_EVENT_PAUSE, NULL, NULL, &info, true);
+  trans = createStateTransform(TASK_STATUS__STREAM_SCAN_HISTORY, TASK_STATUS__PAUSE, TASK_EVENT_PAUSE, NULL, NULL, &info, true);
   taosArrayPush(streamTaskSMTrans, &trans);
   trans = createStateTransform(TASK_STATUS__CK, TASK_STATUS__PAUSE, TASK_EVENT_PAUSE, NULL, NULL, &info, true);
   taosArrayPush(streamTaskSMTrans, &trans);
@@ -410,7 +429,7 @@ void doInitStateTransferTable(void) {
   taosArrayPush(streamTaskSMTrans, &trans);
   trans = createStateTransform(TASK_STATUS__CK, TASK_STATUS__STOP, TASK_EVENT_STOP, NULL, NULL, NULL, true);
   taosArrayPush(streamTaskSMTrans, &trans);
-  trans = createStateTransform(TASK_STATUS_STREAM_SCAN_HISTORY, TASK_STATUS__STOP, TASK_EVENT_STOP, NULL, NULL, NULL, true);
+  trans = createStateTransform(TASK_STATUS__STREAM_SCAN_HISTORY, TASK_STATUS__STOP, TASK_EVENT_STOP, NULL, NULL, NULL, true);
   taosArrayPush(streamTaskSMTrans, &trans);
 
   // dropping related event
@@ -430,6 +449,6 @@ void doInitStateTransferTable(void) {
   taosArrayPush(streamTaskSMTrans, &trans);
   trans = createStateTransform(TASK_STATUS__CK, TASK_STATUS__DROPPING, TASK_EVENT_DROPPING, NULL, NULL, NULL, true);
   taosArrayPush(streamTaskSMTrans, &trans);
-  trans = createStateTransform(TASK_STATUS_STREAM_SCAN_HISTORY, TASK_STATUS__DROPPING, TASK_EVENT_DROPPING, NULL, NULL, NULL, true);
+  trans = createStateTransform(TASK_STATUS__STREAM_SCAN_HISTORY, TASK_STATUS__DROPPING, TASK_EVENT_DROPPING, NULL, NULL, NULL, true);
   taosArrayPush(streamTaskSMTrans, &trans);
 }
\ No newline at end of file