diff --git a/include/libs/stream/tstream.h b/include/libs/stream/tstream.h
index c4033b5482..b7544a13ca 100644
--- a/include/libs/stream/tstream.h
+++ b/include/libs/stream/tstream.h
@@ -647,9 +647,9 @@ void         streamMetaClose(SStreamMeta* streamMeta);
 // save to b-tree meta store
 int32_t      streamMetaSaveTask(SStreamMeta* pMeta, SStreamTask* pTask);
 int32_t      streamMetaRemoveTask(SStreamMeta* pMeta, int32_t taskId);
-int32_t      streamMetaRegisterTask(SStreamMeta* pMeta, int64_t ver, SStreamTask* pTask);
+int32_t      streamMetaRegisterTask(SStreamMeta* pMeta, int64_t ver, SStreamTask* pTask, bool* pAdded);
 int32_t      streamMetaUnregisterTask(SStreamMeta* pMeta, int32_t taskId);
-int32_t      streamMetaGetNumOfTasks(const SStreamMeta* pMeta);   // todo remove it
+int32_t      streamMetaGetNumOfTasks(SStreamMeta* pMeta);   // todo remove it
 SStreamTask* streamMetaAcquireTask(SStreamMeta* pMeta, int32_t taskId);
 void         streamMetaReleaseTask(SStreamMeta* pMeta, SStreamTask* pTask);
 
diff --git a/source/dnode/snode/src/snode.c b/source/dnode/snode/src/snode.c
index 0e3ad3293b..b0ddefce79 100644
--- a/source/dnode/snode/src/snode.c
+++ b/source/dnode/snode/src/snode.c
@@ -160,7 +160,9 @@ int32_t sndProcessTaskDeployReq(SSnode *pSnode, char *msg, int32_t msgLen) {
 
   // 2.save task
   taosWLockLatch(&pSnode->pMeta->lock);
-  code = streamMetaRegisterTask(pSnode->pMeta, -1, pTask);
+
+  bool added = false;
+  code = streamMetaRegisterTask(pSnode->pMeta, -1, pTask, &added);
   if (code < 0) {
     taosWUnLockLatch(&pSnode->pMeta->lock);
     return -1;
diff --git a/source/dnode/vnode/src/tq/tq.c b/source/dnode/vnode/src/tq/tq.c
index 15b66b8e07..2331e690df 100644
--- a/source/dnode/vnode/src/tq/tq.c
+++ b/source/dnode/vnode/src/tq/tq.c
@@ -1039,27 +1039,36 @@ int32_t tqProcessTaskDeployReq(STQ* pTq, int64_t sversion, char* msg, int32_t ms
   SStreamMeta* pStreamMeta = pTq->pStreamMeta;
 
   // 2.save task, use the newest commit version as the initial start version of stream task.
-  int32_t taskId = 0;
-  taosWLockLatch(&pStreamMeta->lock);
-  code = streamMetaRegisterTask(pStreamMeta, sversion, pTask);
+  int32_t taskId = pTask->id.taskId;
+  bool    added = false;
 
-  taskId = pTask->id.taskId;
+  taosWLockLatch(&pStreamMeta->lock);
+  code = streamMetaRegisterTask(pStreamMeta, sversion, pTask, &added);
   int32_t numOfTasks = streamMetaGetNumOfTasks(pStreamMeta);
+
   if (code < 0) {
-    tqError("vgId:%d failed to add s-task:%s, total:%d", vgId, pTask->id.idStr, numOfTasks);
+    tqError("vgId:%d failed to add s-task:0x%x, total:%d", vgId, pTask->id.taskId, numOfTasks);
     tFreeStreamTask(pTask);
     taosWUnLockLatch(&pStreamMeta->lock);
     return -1;
   }
 
+  // not added into meta store
+  if (!added) {
+    tqWarn("vgId:%d failed to add s-task:0x%x, already exists in meta store", vgId, taskId);
+    tFreeStreamTask(pTask);
+    pTask = NULL;
+  }
+
   taosWUnLockLatch(&pStreamMeta->lock);
-  tqDebug("vgId:%d s-task:%s is deployed and add into meta, status:%s, numOfTasks:%d", vgId, pTask->id.idStr,
-          streamGetTaskStatusStr(pTask->status.taskStatus), numOfTasks);
+
+  tqDebug("vgId:%d s-task:0x%x is deployed and add into meta, numOfTasks:%d", vgId, taskId, numOfTasks);
 
   // 3. It's an fill history task, do nothing. wait for the main task to start it
   SStreamTask* p = streamMetaAcquireTask(pStreamMeta, taskId);
-  if (p != NULL) {
-    streamTaskCheckDownstreamTasks(pTask);
+  if (p != NULL) { // reset the downstreamReady flag.
+    p->status.downstreamReady = 0;
+    streamTaskCheckDownstreamTasks(p);
   }
 
   streamMetaReleaseTask(pStreamMeta, p);
@@ -1174,7 +1183,7 @@ int32_t tqProcessTaskScanHistory(STQ* pTq, SRpcMsg* pMsg) {
       if (!streamTaskRecoverScanStep1Finished(pTask)) {
         STimeWindow* pWindow = &pTask->dataRange.window;
         tqDebug("s-task:%s level:%d verRange:%" PRId64 " - %" PRId64 " window:%" PRId64 "-%" PRId64
-                ", do secondary scan-history data after halt the related stream task:%s",
+                ", do secondary scan-history from WAL after halt the related stream task:%s",
                 id, pTask->info.taskLevel, pRange->minVer, pRange->maxVer, pWindow->skey, pWindow->ekey, id);
         ASSERT(pTask->status.schedStatus == TASK_SCHED_STATUS__WAITING);
 
@@ -1216,12 +1225,13 @@ int32_t tqProcessTaskScanHistory(STQ* pTq, SRpcMsg* pMsg) {
     if (pTask->historyTaskId.taskId == 0) {
       *pWindow = (STimeWindow){INT64_MIN, INT64_MAX};
       tqDebug(
-          "s-task:%s scan history in stream time window completed, no related fill-history task, reset the time "
+          "s-task:%s scanhistory in stream time window completed, no related fill-history task, reset the time "
           "window:%" PRId64 " - %" PRId64,
           id, pWindow->skey, pWindow->ekey);
+      qResetStreamInfoTimeWindow(pTask->exec.pExecutor);
     } else {
       tqDebug(
-          "s-task:%s scan history in stream time window completed, now start to handle data from WAL, start "
+          "s-task:%s scan-history in stream time window completed, now start to handle data from WAL, start "
           "ver:%" PRId64 ", window:%" PRId64 " - %" PRId64,
           id, pTask->chkInfo.currentVer, pWindow->skey, pWindow->ekey);
     }
diff --git a/source/dnode/vnode/src/tq/tqPush.c b/source/dnode/vnode/src/tq/tqPush.c
index 06af53d453..5ccf4c825b 100644
--- a/source/dnode/vnode/src/tq/tqPush.c
+++ b/source/dnode/vnode/src/tq/tqPush.c
@@ -35,7 +35,10 @@ int32_t tqPushMsg(STQ* pTq, void* msg, int32_t msgLen, tmsg_t msgType, int64_t v
     tqProcessSubmitReqForSubscribe(pTq);
   }
 
+  taosRLockLatch(&pTq->pStreamMeta->lock);
   int32_t numOfTasks = streamMetaGetNumOfTasks(pTq->pStreamMeta);
+  taosRUnLockLatch(&pTq->pStreamMeta->lock);
+
   tqDebug("handle submit, restore:%d, size:%d", pTq->pVnode->restored, numOfTasks);
 
   // push data for stream processing:
diff --git a/source/libs/executor/src/executor.c b/source/libs/executor/src/executor.c
index d14b79f4bc..15b2cc4efb 100644
--- a/source/libs/executor/src/executor.c
+++ b/source/libs/executor/src/executor.c
@@ -122,8 +122,9 @@ void qResetStreamInfoTimeWindow(qTaskInfo_t tinfo) {
     return;
   }
 
-  qDebug("%s set fill history start key:%" PRId64, GET_TASKID(pTaskInfo), INT64_MIN);
+  qDebug("%s set stream fill-history window:%" PRId64"-%"PRId64, GET_TASKID(pTaskInfo), INT64_MIN, INT64_MAX);
   pTaskInfo->streamInfo.fillHistoryWindow.skey = INT64_MIN;
+  pTaskInfo->streamInfo.fillHistoryWindow.ekey = INT64_MAX;
 }
 
 static int32_t doSetStreamBlock(SOperatorInfo* pOperator, void* input, size_t numOfBlocks, int32_t type, const char* id) {
diff --git a/source/libs/stream/src/streamMeta.c b/source/libs/stream/src/streamMeta.c
index 758530f4fb..ae07738868 100644
--- a/source/libs/stream/src/streamMeta.c
+++ b/source/libs/stream/src/streamMeta.c
@@ -237,7 +237,9 @@ int32_t streamMetaRemoveTask(SStreamMeta* pMeta, int32_t taskId) {
 }
 
 // add to the ready tasks hash map, not the restored tasks hash map
-int32_t streamMetaRegisterTask(SStreamMeta* pMeta, int64_t ver, SStreamTask* pTask) {
+int32_t streamMetaRegisterTask(SStreamMeta* pMeta, int64_t ver, SStreamTask* pTask, bool* pAdded) {
+  *pAdded = false;
+
   void* p = taosHashGet(pMeta->pTasks, &pTask->id.taskId, sizeof(pTask->id.taskId));
   if (p == NULL) {
     if (pMeta->expandFunc(pMeta->ahandle, pTask, ver) < 0) {
@@ -261,13 +263,13 @@ int32_t streamMetaRegisterTask(SStreamMeta* pMeta, int64_t ver, SStreamTask* pTa
   }
 
   taosHashPut(pMeta->pTasks, &pTask->id.taskId, sizeof(pTask->id.taskId), &pTask, POINTER_BYTES);
+  *pAdded = true;
   return 0;
 }
 
-int32_t streamMetaGetNumOfTasks(const SStreamMeta* pMeta) {
+int32_t streamMetaGetNumOfTasks(SStreamMeta* pMeta) {
   size_t size = taosHashGetSize(pMeta->pTasks);
   ASSERT(taosArrayGetSize(pMeta->pTaskList) == taosHashGetSize(pMeta->pTasks));
-
   return (int32_t)size;
 }