diff --git a/include/libs/stream/tstream.h b/include/libs/stream/tstream.h
index 9572157fbb..2b0156a668 100644
--- a/include/libs/stream/tstream.h
+++ b/include/libs/stream/tstream.h
@@ -46,9 +46,10 @@ enum {
 };
 
 enum {
-  TASK_EXEC_STATUS__IDLE = 1,
-  TASK_EXEC_STATUS__EXECUTING,
-  TASK_EXEC_STATUS__CLOSING,
+  TASK_SCHED_STATUS__INACTIVE = 1,
+  TASK_SCHED_STATUS__WAITING,
+  TASK_SCHED_STATUS__ACTIVE,
+  TASK_SCHED_STATUS__FAILED,
 };
 
 enum {
@@ -204,13 +205,11 @@ typedef struct {
 enum {
   TASK_SOURCE__SCAN = 1,
   TASK_SOURCE__PIPE,
-  TASK_SOURCE__MERGE,
 };
 
 enum {
   TASK_EXEC__NONE = 1,
   TASK_EXEC__PIPE,
-  TASK_EXEC__MERGE,
 };
 
 enum {
@@ -256,7 +255,7 @@ typedef struct SStreamTask {
   int16_t dispatchMsgType;
 
   int8_t taskStatus;
-  int8_t execStatus;
+  int8_t schedStatus;
 
   // node info
   int32_t selfChildId;
@@ -487,6 +486,9 @@ int32_t streamProcessRecoverRsp(SStreamTask* pTask, SStreamTaskRecoverRsp* pRsp)
 int32_t streamProcessRetrieveReq(SStreamTask* pTask, SStreamRetrieveReq* pReq, SRpcMsg* pMsg);
 int32_t streamProcessRetrieveRsp(SStreamTask* pTask, SStreamRetrieveRsp* pRsp);
 
+int32_t streamTryExec(SStreamTask* pTask);
+int32_t streamSchedExec(SStreamTask* pTask);
+
 typedef struct SStreamMeta SStreamMeta;
 
 SStreamMeta* streamMetaOpen();
diff --git a/source/dnode/vnode/src/tq/tq.c b/source/dnode/vnode/src/tq/tq.c
index b6293bd6cf..adc16eee0f 100644
--- a/source/dnode/vnode/src/tq/tq.c
+++ b/source/dnode/vnode/src/tq/tq.c
@@ -604,7 +604,7 @@ int32_t tqExpandTask(STQ* pTq, SStreamTask* pTask) {
     ASSERT(taosArrayGetSize(pTask->childEpInfo) != 0);
   }
 
-  pTask->execStatus = TASK_EXEC_STATUS__IDLE;
+  pTask->schedStatus = TASK_SCHED_STATUS__INACTIVE;
 
   pTask->inputQueue = streamQueueOpen();
   pTask->outputQueue = streamQueueOpen();
diff --git a/source/dnode/vnode/src/tq/tqPush.c b/source/dnode/vnode/src/tq/tqPush.c
index 0debeaef90..1c48ef7535 100644
--- a/source/dnode/vnode/src/tq/tqPush.c
+++ b/source/dnode/vnode/src/tq/tqPush.c
@@ -136,31 +136,6 @@ int32_t tqSendExecReq(STQ* pTq, STqHandle* pHandle) {
   return 0;
 }
 
-int32_t tqEnqueueAll(STQ* pTq, SSubmitReq* pReq) {
-  void*              pIter = NULL;
-  SStreamDataSubmit* pSubmit = streamDataSubmitNew(pReq);
-  if (pSubmit == NULL) {
-    return -1;
-  }
-
-  while (1) {
-    pIter = taosHashIterate(pTq->handles, pIter);
-    if (pIter == NULL) break;
-    STqHandle* pHandle = (STqHandle*)pIter;
-    if (tqEnqueue(pHandle, pSubmit) < 0) {
-      continue;
-    }
-    int8_t execStatus = atomic_load_8(&pHandle->pushHandle.execStatus);
-    if (execStatus == TASK_EXEC_STATUS__IDLE || execStatus == TASK_EXEC_STATUS__CLOSING) {
-      tqSendExecReq(pTq, pHandle);
-    }
-  }
-
-  streamDataSubmitRefDec(pSubmit);
-
-  return 0;
-}
-
 int32_t tqPushMsgNew(STQ* pTq, void* msg, int32_t msgLen, tmsg_t msgType, int64_t ver, SRpcHandleInfo handleInfo) {
   if (msgType != TDMT_VND_SUBMIT) return 0;
   void*       pIter = NULL;
diff --git a/source/libs/stream/src/stream.c b/source/libs/stream/src/stream.c
index 7a19998d02..fd4329d285 100644
--- a/source/libs/stream/src/stream.c
+++ b/source/libs/stream/src/stream.c
@@ -83,8 +83,8 @@ int32_t streamSetupTrigger(SStreamTask* pTask) {
 }
 
 int32_t streamLaunchByWrite(SStreamTask* pTask, int32_t vgId) {
-  int8_t execStatus = atomic_load_8(&pTask->execStatus);
-  if (execStatus == TASK_EXEC_STATUS__IDLE || execStatus == TASK_EXEC_STATUS__CLOSING) {
+  int8_t schedStatus = atomic_load_8(&pTask->schedStatus);
+  if (schedStatus == TASK_SCHED_STATUS__INACTIVE) {
     SStreamTaskRunReq* pRunReq = rpcMallocCont(sizeof(SStreamTaskRunReq));
     if (pRunReq == NULL) return -1;
 
@@ -102,6 +102,28 @@ int32_t streamLaunchByWrite(SStreamTask* pTask, int32_t vgId) {
   return 0;
 }
 
+int32_t streamSchedExec(SStreamTask* pTask) {
+  int8_t schedStatus =
+      atomic_val_compare_exchange_8(&pTask->schedStatus, TASK_SCHED_STATUS__INACTIVE, TASK_SCHED_STATUS__WAITING);
+  if (schedStatus == TASK_SCHED_STATUS__INACTIVE) {
+    SStreamTaskRunReq* pRunReq = rpcMallocCont(sizeof(SStreamTaskRunReq));
+    if (pRunReq == NULL) {
+      atomic_store_8(&pTask->schedStatus, TASK_SCHED_STATUS__INACTIVE);
+      return -1;
+    }
+    pRunReq->head.vgId = pTask->nodeId;
+    pRunReq->streamId = pTask->streamId;
+    pRunReq->taskId = pTask->taskId;
+    SRpcMsg msg = {
+        .msgType = TDMT_STREAM_TASK_RUN,
+        .pCont = pRunReq,
+        .contLen = sizeof(SStreamTaskRunReq),
+    };
+    tmsgPutToQueue(pTask->pMsgCb, STREAM_QUEUE, &msg);
+  }
+  return 0;
+}
+
 int32_t streamTaskEnqueue(SStreamTask* pTask, SStreamDispatchReq* pReq, SRpcMsg* pRsp) {
   SStreamDataBlock* pData = taosAllocateQitem(sizeof(SStreamDataBlock), DEF_QITEM);
   int8_t            status;
@@ -182,14 +204,13 @@ int32_t streamProcessDispatchReq(SStreamTask* pTask, SStreamDispatchReq* pReq, S
   streamTaskEnqueue(pTask, pReq, pRsp);
 
   if (exec) {
-    streamExec(pTask);
+    streamTryExec(pTask);
 
     if (pTask->dispatchType != TASK_DISPATCH__NONE) {
-      ASSERT(pTask->sinkType == TASK_SINK__NONE);
       streamDispatch(pTask);
     }
   } else {
-    streamLaunchByWrite(pTask, pTask->nodeId);
+    streamSchedExec(pTask);
   }
 
   return 0;
@@ -219,7 +240,7 @@ int32_t streamProcessDispatchRsp(SStreamTask* pTask, SStreamDispatchRsp* pRsp) {
 }
 
 int32_t streamProcessRunReq(SStreamTask* pTask) {
-  streamExec(pTask);
+  streamTryExec(pTask);
 
   if (pTask->dispatchType != TASK_DISPATCH__NONE) {
     streamDispatch(pTask);
@@ -272,7 +293,7 @@ int32_t streamProcessRetrieveReq(SStreamTask* pTask, SStreamRetrieveReq* pReq, S
   streamTaskEnqueueRetrieve(pTask, pReq, pRsp);
 
   ASSERT(pTask->execType != TASK_EXEC__NONE);
-  streamExec(pTask);
+  streamTryExec(pTask);
 
   ASSERT(pTask->dispatchType != TASK_DISPATCH__NONE);
   streamDispatch(pTask);
diff --git a/source/libs/stream/src/streamDispatch.c b/source/libs/stream/src/streamDispatch.c
index 26cd9111bf..ef7c10c8e1 100644
--- a/source/libs/stream/src/streamDispatch.c
+++ b/source/libs/stream/src/streamDispatch.c
@@ -440,13 +440,13 @@ FAIL:
 
 int32_t streamDispatch(SStreamTask* pTask) {
   ASSERT(pTask->dispatchType != TASK_DISPATCH__NONE);
-#if 1
+  ASSERT(pTask->sinkType == TASK_SINK__NONE);
+
   int8_t old =
       atomic_val_compare_exchange_8(&pTask->outputStatus, TASK_OUTPUT_STATUS__NORMAL, TASK_OUTPUT_STATUS__WAIT);
   if (old != TASK_OUTPUT_STATUS__NORMAL) {
     return 0;
   }
-#endif
 
   SStreamDataBlock* pBlock = streamQueueNextItem(pTask->outputQueue);
   if (pBlock == NULL) {
@@ -466,22 +466,8 @@ int32_t streamDispatch(SStreamTask* pTask) {
     atomic_store_8(&pTask->outputStatus, TASK_OUTPUT_STATUS__NORMAL);
     goto FREE;
   }
-  /*atomic_store_8(&pTask->outputStatus, TASK_OUTPUT_STATUS__NORMAL);*/
 FREE:
   taosArrayDestroyEx(pBlock->blocks, (FDelete)blockDataFreeRes);
   taosFreeQitem(pBlock);
-#if 0
-  SRpcMsg dispatchMsg = {0};
-  SEpSet* pEpSet = NULL;
-  if (streamBuildDispatchMsg(pTask, pBlock, &dispatchMsg, &pEpSet) < 0) {
-    ASSERT(0);
-    atomic_store_8(&pTask->outputStatus, TASK_OUTPUT_STATUS__NORMAL);
-    return -1;
-  }
-  taosArrayDestroyEx(pBlock->blocks, (FDelete)blockDataFreeRes);
-  taosFreeQitem(pBlock);
-
-  tmsgSendReq(pEpSet, &dispatchMsg);
-#endif
   return code;
 }
diff --git a/source/libs/stream/src/streamExec.c b/source/libs/stream/src/streamExec.c
index 3c008f7934..bbc02080c6 100644
--- a/source/libs/stream/src/streamExec.c
+++ b/source/libs/stream/src/streamExec.c
@@ -147,24 +147,26 @@ int32_t streamPipelineExec(SStreamTask* pTask, int32_t batchNum) {
 
   return 0;
 }
-
-static SArray* streamExecForQall(SStreamTask* pTask, SArray* pRes) {
+// TODO: handle version
+int32_t streamExecForAll(SStreamTask* pTask) {
   while (1) {
     int32_t cnt = 1;
     void*   data = NULL;
     while (1) {
       SStreamQueueItem* qItem = streamQueueNextItem(pTask->inputQueue);
       if (qItem == NULL) {
-        qDebug("stream exec over, queue empty");
+        qDebug("stream task exec over, queue empty, task: %d", pTask->taskId);
         break;
       }
       if (data == NULL) {
         data = qItem;
         streamQueueProcessSuccess(pTask->inputQueue);
-        if (pTask->execType == TASK_EXEC__NONE) break;
-        /*if (qItem->type == STREAM_INPUT__DATA_BLOCK) {*/
-        /*streamUpdateVer(pTask, (SStreamDataBlock*)qItem);*/
-        /*}*/
+        if (pTask->execType == TASK_EXEC__NONE) {
+          ASSERT(((SStreamQueueItem*)data)->type == STREAM_INPUT__DATA_BLOCK);
+          streamTaskOutput(pTask, data);
+          data = NULL;
+          continue;
+        }
       } else {
         void* newRet;
         if ((newRet = streamAppendQueueItem(data, qItem)) == NULL) {
@@ -181,18 +183,15 @@ static SArray* streamExecForQall(SStreamTask* pTask, SArray* pRes) {
 
     if (pTask->taskStatus == TASK_STATUS__DROPPING) {
       if (data) streamFreeQitem(data);
-      taosArrayDestroyEx(pRes, (FDelete)blockDataFreeRes);
-      return NULL;
+      return 0;
     }
 
-    if (data == NULL) break;
-
-    if (pTask->execType == TASK_EXEC__NONE) {
-      ASSERT(((SStreamQueueItem*)data)->type == STREAM_INPUT__DATA_BLOCK);
-      streamTaskOutput(pTask, data);
-      continue;
+    if (data == NULL) {
+      return 0;
     }
 
+    SArray* pRes = taosArrayInit(0, sizeof(SSDataBlock));
+
     qDebug("stream task %d exec begin, msg batch: %d", pTask->taskId, cnt);
     streamTaskExecImpl(pTask, data, pRes);
     qDebug("stream task %d exec end", pTask->taskId);
@@ -203,76 +202,44 @@ static SArray* streamExecForQall(SStreamTask* pTask, SArray* pRes) {
         // TODO log failed ver
         streamQueueProcessFail(pTask->inputQueue);
         taosArrayDestroy(pRes);
-        return NULL;
+        return -1;
       }
       qRes->type = STREAM_INPUT__DATA_BLOCK;
       qRes->blocks = pRes;
-      if (streamTaskOutput(pTask, qRes) < 0) {
-        // TODO log failed ver
-        /*streamQueueProcessFail(pTask->inputQueue);*/
-        taosArrayDestroyEx(pRes, (FDelete)blockDataFreeRes);
-        taosFreeQitem(qRes);
-        return NULL;
-      }
+
       if (((SStreamQueueItem*)data)->type == STREAM_INPUT__DATA_SUBMIT) {
         SStreamDataSubmit* pSubmit = (SStreamDataSubmit*)data;
         qRes->childId = pTask->selfChildId;
         qRes->sourceVer = pSubmit->ver;
       }
+
+      if (streamTaskOutput(pTask, qRes) < 0) {
+        // TODO save failed ver
+        /*streamQueueProcessFail(pTask->inputQueue);*/
+        taosArrayDestroyEx(pRes, (FDelete)blockDataFreeRes);
+        taosFreeQitem(qRes);
+        return -1;
+      }
       /*streamQueueProcessSuccess(pTask->inputQueue);*/
-      pRes = taosArrayInit(0, sizeof(SSDataBlock));
-    }
-
-    streamFreeQitem(data);
-  }
-  return pRes;
-}
-
-// TODO: handle version
-int32_t streamExec(SStreamTask* pTask) {
-  SArray* pRes = taosArrayInit(0, sizeof(SSDataBlock));
-  if (pRes == NULL) return -1;
-  while (1) {
-    int8_t execStatus =
-        atomic_val_compare_exchange_8(&pTask->execStatus, TASK_EXEC_STATUS__IDLE, TASK_EXEC_STATUS__EXECUTING);
-    if (execStatus == TASK_EXEC_STATUS__IDLE) {
-      // first run
-      qDebug("stream exec, enter exec status");
-      pRes = streamExecForQall(pTask, pRes);
-      if (pRes == NULL) goto FAIL;
-
-// temporarily disable status closing, since it runs out of threads
-#if 0
-      // set status closing
-      atomic_store_8(&pTask->execStatus, TASK_EXEC_STATUS__CLOSING);
-
-      // second run, make sure inputQ and qall are cleared
-      qDebug("stream exec, enter closing status");
-      pRes = streamExecForQall(pTask, pRes);
-      if (pRes == NULL) goto FAIL;
-#endif
-
-      taosArrayDestroyEx(pRes, (FDelete)blockDataFreeRes);
-      atomic_store_8(&pTask->execStatus, TASK_EXEC_STATUS__IDLE);
-      qDebug("stream exec, return result");
-      return 0;
-    } else if (execStatus == TASK_EXEC_STATUS__CLOSING) {
-      continue;
-    } else if (execStatus == TASK_EXEC_STATUS__EXECUTING) {
-      ASSERT(taosArrayGetSize(pRes) == 0);
-      taosArrayDestroyEx(pRes, (FDelete)blockDataFreeRes);
-      return 0;
-    } else {
-      ASSERT(0);
     }
   }
-FAIL:
-  if (pRes) taosArrayDestroy(pRes);
-  if (pTask->taskStatus == TASK_STATUS__DROPPING) {
-    tFreeSStreamTask(pTask);
-    return 0;
-  } else {
-    atomic_store_8(&pTask->execStatus, TASK_EXEC_STATUS__IDLE);
-    return -1;
-  }
+  return 0;
+}
+
+int32_t streamTryExec(SStreamTask* pTask) {
+  int8_t schedStatus =
+      atomic_val_compare_exchange_8(&pTask->schedStatus, TASK_SCHED_STATUS__WAITING, TASK_SCHED_STATUS__ACTIVE);
+  if (schedStatus == TASK_SCHED_STATUS__WAITING) {
+    int32_t code = streamExecForAll(pTask);
+    if (code < 0) {
+      atomic_store_8(&pTask->schedStatus, TASK_SCHED_STATUS__FAILED);
+      return -1;
+    }
+    atomic_store_8(&pTask->schedStatus, TASK_SCHED_STATUS__INACTIVE);
+
+    if (!taosQueueEmpty(pTask->inputQueue->queue)) {
+      streamSchedExec(pTask);
+    }
+  }
+  return 0;
 }
diff --git a/source/libs/stream/src/streamQueue.c b/source/libs/stream/src/streamQueue.c
index f82ef1b42f..6819e5329f 100644
--- a/source/libs/stream/src/streamQueue.c
+++ b/source/libs/stream/src/streamQueue.c
@@ -35,9 +35,10 @@ FAIL:
 void streamQueueClose(SStreamQueue* queue) {
   while (1) {
     void* qItem = streamQueueNextItem(queue);
-    if (qItem)
+    if (qItem) {
       taosFreeQitem(qItem);
-    else
+    } else {
       return;
+    }
   }
 }
diff --git a/source/libs/stream/src/streamTask.c b/source/libs/stream/src/streamTask.c
index 216e3fa761..c4e946e191 100644
--- a/source/libs/stream/src/streamTask.c
+++ b/source/libs/stream/src/streamTask.c
@@ -23,7 +23,7 @@ SStreamTask* tNewSStreamTask(int64_t streamId) {
   }
   pTask->taskId = tGenIdPI32();
   pTask->streamId = streamId;
-  pTask->execStatus = TASK_EXEC_STATUS__IDLE;
+  pTask->schedStatus = TASK_SCHED_STATUS__INACTIVE;
   pTask->inputStatus = TASK_INPUT_STATUS__NORMAL;
   pTask->outputStatus = TASK_OUTPUT_STATUS__NORMAL;
 
@@ -59,7 +59,7 @@ int32_t tEncodeSStreamTask(SEncoder* pEncoder, const SStreamTask* pTask) {
   if (tEncodeI16(pEncoder, pTask->dispatchMsgType) < 0) return -1;
 
   if (tEncodeI8(pEncoder, pTask->taskStatus) < 0) return -1;
-  if (tEncodeI8(pEncoder, pTask->execStatus) < 0) return -1;
+  if (tEncodeI8(pEncoder, pTask->schedStatus) < 0) return -1;
 
   if (tEncodeI32(pEncoder, pTask->selfChildId) < 0) return -1;
   if (tEncodeI32(pEncoder, pTask->nodeId) < 0) return -1;
@@ -114,7 +114,7 @@ int32_t tDecodeSStreamTask(SDecoder* pDecoder, SStreamTask* pTask) {
   if (tDecodeI16(pDecoder, &pTask->dispatchMsgType) < 0) return -1;
 
   if (tDecodeI8(pDecoder, &pTask->taskStatus) < 0) return -1;
-  if (tDecodeI8(pDecoder, &pTask->execStatus) < 0) return -1;
+  if (tDecodeI8(pDecoder, &pTask->schedStatus) < 0) return -1;
 
   if (tDecodeI32(pDecoder, &pTask->selfChildId) < 0) return -1;
   if (tDecodeI32(pDecoder, &pTask->nodeId) < 0) return -1;