diff --git a/include/libs/stream/tstream.h b/include/libs/stream/tstream.h
index d3b670d0ecc54506145c4d70566b2ab14c9fe3f2..02bb65b7622fdd49be72de93a2d0856be159261f 100644
--- a/include/libs/stream/tstream.h
+++ b/include/libs/stream/tstream.h
@@ -593,7 +593,6 @@ int32_t streamTaskOutputResultBlock(SStreamTask* pTask, SStreamDataBlock* pBlock
 bool    streamTaskShouldStop(const SStreamStatus* pStatus);
 bool    streamTaskShouldPause(const SStreamStatus* pStatus);
 bool    streamTaskIsIdle(const SStreamTask* pTask);
-int32_t streamTaskEndScanWAL(SStreamTask* pTask);
 
 SStreamChildEpInfo* streamTaskGetUpstreamTaskEpInfo(SStreamTask* pTask, int32_t taskId);
 int32_t             streamScanExec(SStreamTask* pTask, int32_t batchSize);
diff --git a/source/dnode/vnode/src/tq/tq.c b/source/dnode/vnode/src/tq/tq.c
index 70534fa9759b483ba203fba01d830cbfb4d8d7e6..815e9647b557b4f8fa186fc9c59869a03f0e6ddd 100644
--- a/source/dnode/vnode/src/tq/tq.c
+++ b/source/dnode/vnode/src/tq/tq.c
@@ -1274,6 +1274,7 @@ int32_t tqProcessTaskScanHistory(STQ* pTq, SRpcMsg* pMsg) {
       pTask->tsInfo.step2Start = taosGetTimestampMs();
       qDebug("s-task:%s scan-history from WAL stage(step 2) ended, elapsed time:%.2fs", id, 0.0);
       appendTranstateIntoInputQ(pTask);
+      streamTryExec(pTask);  // exec directly
     } else {
       STimeWindow* pWindow = &pTask->dataRange.window;
       tqDebug("s-task:%s level:%d verRange:%" PRId64 " - %" PRId64 " window:%" PRId64 "-%" PRId64
@@ -1525,7 +1526,7 @@ int32_t tqProcessTaskDispatchRsp(STQ* pTq, SRpcMsg* pMsg) {
   if (pTask) {
     streamProcessDispatchRsp(pTask, pRsp, pMsg->code);
     streamMetaReleaseTask(pTq->pStreamMeta, pTask);
-    return 0;
+    return TSDB_CODE_SUCCESS;
   } else {
     tqDebug("vgId:%d failed to handle the dispatch rsp, since find task:0x%x failed", vgId, taskId);
     return TSDB_CODE_INVALID_MSG;
diff --git a/source/dnode/vnode/src/tq/tqRead.c b/source/dnode/vnode/src/tq/tqRead.c
index 9b8f1781cb47182156d7834adb1cbb2c5fbf2050..a875febd097c0fdb5aa61894d179f2f435e11edf 100644
--- a/source/dnode/vnode/src/tq/tqRead.c
+++ b/source/dnode/vnode/src/tq/tqRead.c
@@ -339,8 +339,12 @@ int32_t extractMsgFromWal(SWalReader* pReader, void** pItem, int64_t maxVer, con
     void*   pBody = POINTER_SHIFT(pReader->pHead->head.body, sizeof(SMsgHead));
     int32_t len = pReader->pHead->head.bodyLen - sizeof(SMsgHead);
 
-    extractDelDataBlock(pBody, len, ver, (SStreamRefDataBlock**)pItem);
-    tqDebug("s-task:%s delete msg extract from WAL, len:%d, ver:%"PRId64, id, len, ver);
+    code = extractDelDataBlock(pBody, len, ver, (SStreamRefDataBlock**)pItem);
+    if (code != TSDB_CODE_SUCCESS) {
+      tqError("s-task:%s extract delete msg from WAL failed, code:%s", id, tstrerror(code));
+    } else {
+      tqDebug("s-task:%s delete msg extract from WAL, len:%d, ver:%"PRId64, id, len, ver);
+    }
   } else {
     ASSERT(0);
   }
diff --git a/source/dnode/vnode/src/tq/tqRestore.c b/source/dnode/vnode/src/tq/tqRestore.c
index 305417941694d6c8a790ede1fac9f472068a24f6..d363031db16a39603c81696e06bf6163a62fb787 100644
--- a/source/dnode/vnode/src/tq/tqRestore.c
+++ b/source/dnode/vnode/src/tq/tqRestore.c
@@ -211,12 +211,13 @@ int32_t doSetOffsetForWalReader(SStreamTask *pTask, int32_t vgId) {
 
 static void checkForFillHistoryVerRange(SStreamTask* pTask, int64_t ver) {
   const char* id = pTask->id.idStr;
+  int64_t     maxVer = pTask->dataRange.range.maxVer;
 
   if ((pTask->info.fillHistory == 1) && ver > pTask->dataRange.range.maxVer) {
     if (!pTask->status.appendTranstateBlock) {
       qWarn("s-task:%s fill-history scan WAL, currentVer:%" PRId64 " reach the maximum ver:%" PRId64
             ", not scan wal anymore, add transfer-state block into inputQ",
-            id, ver, pTask->dataRange.range.maxVer);
+            id, ver, maxVer);
 
       double el = (taosGetTimestampMs() - pTask->tsInfo.step2Start) / 1000.0;
       qDebug("s-task:%s scan-history from WAL stage(step 2) ended, elapsed time:%.2fs", id, el);
@@ -224,7 +225,7 @@ static void checkForFillHistoryVerRange(SStreamTask* pTask, int64_t ver) {
       /*int32_t code = */streamSchedExec(pTask);
     } else {
       qWarn("s-task:%s fill-history scan WAL, currentVer:%" PRId64 " reach the maximum ver:%" PRId64 ", not scan wal",
-            id, ver, pTask->dataRange.range.maxVer);
+            id, ver, maxVer);
     }
   }
 }
diff --git a/source/libs/stream/src/streamDispatch.c b/source/libs/stream/src/streamDispatch.c
index 94e005b7904944e6fef09bfa8df8e4086814e278..557b92baf95a607eccbbed69397ceccd12654cbe 100644
--- a/source/libs/stream/src/streamDispatch.c
+++ b/source/libs/stream/src/streamDispatch.c
@@ -757,11 +757,11 @@ int32_t streamProcessDispatchRsp(SStreamTask* pTask, SStreamDispatchRsp* pRsp, i
     qDebug("s-task:%s dispatch transtate msg to downstream successfully, start to transfer state", id);
     ASSERT(pTask->info.fillHistory == 1);
     code = streamTransferStateToStreamTask(pTask);
-
-    if (code != TSDB_CODE_SUCCESS) {
-      atomic_store_8(&pTask->status.schedStatus, TASK_SCHED_STATUS__INACTIVE);
-      return code;
+    if (code != TSDB_CODE_SUCCESS) {  // todo: do nothing if error happens
     }
+
+    streamFreeQitem(pTask->msgInfo.pData);
+    return TSDB_CODE_SUCCESS;
   }
 
   pTask->msgInfo.retryCount = 0;
diff --git a/source/libs/stream/src/streamExec.c b/source/libs/stream/src/streamExec.c
index 3b954793deefc6f0e1f868d961c4ef562e984d0f..b513d7c13e047ddf77cba35fc85252b367f68a31 100644
--- a/source/libs/stream/src/streamExec.c
+++ b/source/libs/stream/src/streamExec.c
@@ -292,9 +292,20 @@ int32_t streamDoTransferStateToStreamTask(SStreamTask* pTask) {
 
   SStreamTask* pStreamTask = streamMetaAcquireTask(pMeta, pTask->streamTaskId.streamId, pTask->streamTaskId.taskId);
   if (pStreamTask == NULL) {
-    // todo: destroy the fill-history task here
-    qError("s-task:%s failed to find related stream task:0x%x, it may have been destroyed or closed", pTask->id.idStr,
-           pTask->streamTaskId.taskId);
+    qError(
+        "s-task:%s failed to find related stream task:0x%x, it may have been destroyed or closed, destroy the related "
+        "fill-history task",
+        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);
+
+    // 2. save to disk
+    taosWLockLatch(&pMeta->lock);
+    if (streamMetaCommit(pMeta) < 0) {
+      // persist to disk
+    }
+    taosWUnLockLatch(&pMeta->lock);
     return TSDB_CODE_STREAM_TASK_NOT_EXIST;
   } else {
     qDebug("s-task:%s fill-history task end, update related stream task:%s info, transfer exec state", pTask->id.idStr,
@@ -334,9 +345,6 @@ int32_t streamDoTransferStateToStreamTask(SStreamTask* pTask) {
     qDebug("s-task:%s no need to update time window for non-source task", pStreamTask->id.idStr);
   }
 
-  // todo check the output queue for fill-history task, and wait for it complete
-
-
   // 1. expand the query time window for stream task of WAL scanner
   pTimeWindow->skey = INT64_MIN;
   qStreamInfoResetTimewindowFilter(pStreamTask->exec.pExecutor);
@@ -390,15 +398,10 @@ int32_t streamTransferStateToStreamTask(SStreamTask* pTask) {
   int32_t level = pTask->info.taskLevel;
   if (level == TASK_LEVEL__SOURCE) {
     streamTaskFillHistoryFinished(pTask);
+  }
+
+  if (level == TASK_LEVEL__AGG || level == TASK_LEVEL__SOURCE) {  // do transfer task operator states.
     code = streamDoTransferStateToStreamTask(pTask);
-    if (code != TSDB_CODE_SUCCESS) {  // todo handle this
-      return code;
-    }
-  } else if (level == TASK_LEVEL__AGG) {  // do transfer task operator states.
-    code = streamDoTransferStateToStreamTask(pTask);
-    if (code != TSDB_CODE_SUCCESS) {  // todo handle this
-      return code;
-    }
   }
 
   return code;
@@ -522,6 +525,7 @@ int32_t streamProcessTranstateBlock(SStreamTask* pTask, SStreamDataBlock* pBlock
       ASSERT(pTask->streamTaskId.taskId != 0 && pTask->info.fillHistory == 1);
     }
 
+    // agg task should dispatch trans-state msg to sink task, to flush all data to sink task.
     if (level == TASK_LEVEL__AGG || level == TASK_LEVEL__SOURCE) {
       pBlock->srcVgId = pTask->pMeta->vgId;
       code = taosWriteQitem(pTask->outputInfo.queue->queue, pBlock);
@@ -530,16 +534,21 @@ int32_t streamProcessTranstateBlock(SStreamTask* pTask, SStreamDataBlock* pBlock
       } else {
         streamFreeQitem((SStreamQueueItem*)pBlock);
       }
+    } else {  // level == TASK_LEVEL__SINK
+      streamFreeQitem((SStreamQueueItem*)pBlock);
     }
   } else { // non-dispatch task, do task state transfer directly
-    qDebug("s-task:%s non-dispatch task, start to transfer state directly", id);
-
     streamFreeQitem((SStreamQueueItem*)pBlock);
-    ASSERT(pTask->info.fillHistory == 1);
-    code = streamTransferStateToStreamTask(pTask);
+    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);
 
-    if (code != TSDB_CODE_SUCCESS) {
-      atomic_store_8(&pTask->status.schedStatus, TASK_SCHED_STATUS__INACTIVE);
+      if (code != TSDB_CODE_SUCCESS) {
+        atomic_store_8(&pTask->status.schedStatus, TASK_SCHED_STATUS__INACTIVE);
+      }
+    } else {
+      qDebug("s-task:%s sink task does not transfer state", id);
     }
   }
 
@@ -642,16 +651,6 @@ bool streamTaskIsIdle(const SStreamTask* pTask) {
           pTask->status.taskStatus == TASK_STATUS__DROPPING);
 }
 
-int32_t streamTaskEndScanWAL(SStreamTask* pTask) {
-  const char* id = pTask->id.idStr;
-  double      el = (taosGetTimestampMs() - pTask->tsInfo.step2Start) / 1000.0;
-  qDebug("s-task:%s scan-history from WAL stage(step 2) ended, elapsed time:%.2fs", id, el);
-
-  // 1. notify all downstream tasks to transfer executor state after handle all history blocks.
-  appendTranstateIntoInputQ(pTask);
-  return TSDB_CODE_SUCCESS;
-}
-
 int32_t streamTryExec(SStreamTask* pTask) {
   // this function may be executed by multi-threads, so status check is required.
   int8_t schedStatus =
@@ -667,36 +666,14 @@ int32_t streamTryExec(SStreamTask* pTask) {
     }
 
     // todo the task should be commit here
-//    if (taosQueueEmpty(pTask->inputQueue->queue)) {
-      // fill-history WAL scan has completed
-//      if (pTask->status.transferState) {
-//        code = streamTransferStateToStreamTask(pTask);
-//        if (code != TSDB_CODE_SUCCESS) {
-//          atomic_store_8(&pTask->status.schedStatus, TASK_SCHED_STATUS__INACTIVE);
-//          return code;
-//        }
-
-        // the schedStatus == TASK_SCHED_STATUS__ACTIVE, streamSchedExec cannot be executed, so execute once again by
-        // call this function (streamExecForAll) directly.
-        //        code = streamExecForAll(pTask);
-        //        if (code < 0) {
-        // do nothing
-        //        }
-//      }
-
-//      atomic_store_8(&pTask->status.schedStatus, TASK_SCHED_STATUS__INACTIVE);
-//      qDebug("s-task:%s exec completed, status:%s, sched-status:%d", id,
-//             streamGetTaskStatusStr(pTask->status.taskStatus), pTask->status.schedStatus);
-//    } else {
-      atomic_store_8(&pTask->status.schedStatus, TASK_SCHED_STATUS__INACTIVE);
-      qDebug("s-task:%s exec completed, status:%s, sched-status:%d", id, streamGetTaskStatusStr(pTask->status.taskStatus),
-             pTask->status.schedStatus);
-
-      if (!(taosQueueEmpty(pTask->inputQueue->queue) || streamTaskShouldStop(&pTask->status) ||
-            streamTaskShouldPause(&pTask->status))) {
-        streamSchedExec(pTask);
-      }
-//    }
+    atomic_store_8(&pTask->status.schedStatus, TASK_SCHED_STATUS__INACTIVE);
+    qDebug("s-task:%s exec completed, status:%s, sched-status:%d", id, streamGetTaskStatusStr(pTask->status.taskStatus),
+           pTask->status.schedStatus);
+
+    if (!(taosQueueEmpty(pTask->inputQueue->queue) || streamTaskShouldStop(&pTask->status) ||
+          streamTaskShouldPause(&pTask->status))) {
+      streamSchedExec(pTask);
+    }
   } else {
     qDebug("s-task:%s already started to exec by other thread, status:%s, sched-status:%d", id,
            streamGetTaskStatusStr(pTask->status.taskStatus), pTask->status.schedStatus);
diff --git a/source/libs/stream/src/streamRecover.c b/source/libs/stream/src/streamRecover.c
index 72dae735e1977020f1058dcae6e0c7a01db96d01..0a1a15259c8dc66f8e7973d4bd51cf75718f5748 100644
--- a/source/libs/stream/src/streamRecover.c
+++ b/source/libs/stream/src/streamRecover.c
@@ -400,11 +400,6 @@ int32_t appendTranstateIntoInputQ(SStreamTask* pTask) {
   }
 
   pTask->status.appendTranstateBlock = true;
-
-  qDebug("s-task:%s set sched-status:%d, prev:%d", pTask->id.idStr, TASK_SCHED_STATUS__INACTIVE, pTask->status.schedStatus);
-  pTask->status.schedStatus = TASK_SCHED_STATUS__INACTIVE;
-  streamSchedExec(pTask);
-
   return TSDB_CODE_SUCCESS;
 }