diff --git a/include/common/tmsgdef.h b/include/common/tmsgdef.h
index 8940d1be96..e6e78bd1df 100644
--- a/include/common/tmsgdef.h
+++ b/include/common/tmsgdef.h
@@ -257,7 +257,7 @@ enum {
   TD_DEF_MSG_TYPE(TDMT_STREAM_SCAN_HISTORY_FINISH, "stream-scan-history-finish", NULL, NULL)
   TD_DEF_MSG_TYPE(TDMT_STREAM_TRANSFER_STATE, "stream-transfer-state", NULL, NULL)
   TD_DEF_MSG_TYPE(TDMT_STREAM_TASK_CHECK, "stream-task-check", NULL, NULL)
-  TD_DEF_MSG_TYPE(TDMT_STREAM_TASK_CHECKPOINT, "stream-checkpoint", NULL, NULL)
+  TD_DEF_MSG_TYPE(TDMT_STREAM_TASK_CHECKPOINT_READY, "stream-checkpoint-ready", NULL, NULL)
   TD_DEF_MSG_TYPE(TDMT_STREAM_TASK_REPORT_CHECKPOINT, "stream-report-checkpoint", NULL, NULL)
   TD_DEF_MSG_TYPE(TDMT_STREAM_TASK_RESTORE_CHECKPOINT, "stream-restore-checkpoint", NULL, NULL)
   TD_DEF_MSG_TYPE(TDMT_STREAM_MAX_MSG, "stream-max", NULL, NULL)
diff --git a/include/libs/stream/tstream.h b/include/libs/stream/tstream.h
index 045d89cc22..08e4b55ffe 100644
--- a/include/libs/stream/tstream.h
+++ b/include/libs/stream/tstream.h
@@ -123,7 +123,7 @@ typedef struct {
   int8_t  type;
 
   int32_t srcVgId;
-  int32_t childId;
+  int32_t srcTaskId;
   int64_t sourceVer;
   int64_t reqId;
 
@@ -312,7 +312,7 @@ struct SStreamTask {
   SStreamId        historyTaskId;
   SStreamId        streamTaskId;
   SArray*          pUpstreamInfoList;    // SArray<SStreamChildEpInfo*>, // children info
-  SArray*          pRpcMsgList;          // SArray<SRpcMsg*>
+  SArray*          pReadyMsgList;          // SArray<SStreamChkptReadyInfo*>
 
   // output
   union {
@@ -368,7 +368,6 @@ typedef struct SStreamMeta {
   SHashObj*     pTaskBackendUnique;
   TdThreadMutex backendMutex;
 
-//  uint64_t checkpointId;
   int32_t  chkptNotReadyTasks;
   SArray*  checkpointSaved;
   SArray*  checkpointInUse;
@@ -396,7 +395,8 @@ typedef struct {
 typedef struct {
   int64_t streamId;
   int32_t taskId;
-  int32_t dataSrcVgId;
+  int32_t type;
+  int32_t srcVgId;
   int32_t upstreamTaskId;
   int32_t upstreamChildId;
   int32_t upstreamNodeId;
@@ -503,24 +503,10 @@ typedef struct {
   int32_t  upstreamTaskId;
   int32_t  upstreamNodeId;
   int32_t  childId;
-} SStreamCheckpointReq;
+} SStreamCheckpointReadyMsg;
 
-typedef struct {
-  SMsgHead msgHead;
-  int64_t  streamId;
-  int64_t  checkpointId;
-  int32_t  downstreamTaskId;
-  int32_t  downstreamNodeId;
-  int32_t  upstreamTaskId;
-  int32_t  upstreamNodeId;
-  int32_t  childId;
-} SStreamCheckpointRsp;
-
-int32_t tEncodeStreamCheckpointReq(SEncoder* pEncoder, const SStreamCheckpointReq* pReq);
-int32_t tDecodeStreamCheckpointReq(SDecoder* pDecoder, SStreamCheckpointReq* pReq);
-
-int32_t tEncodeStreamCheckpointRsp(SEncoder* pEncoder, const SStreamCheckpointRsp* pRsp);
-int32_t tDecodeStreamCheckpointRsp(SDecoder* pDecoder, SStreamCheckpointRsp* pRsp);
+int32_t tEncodeStreamCheckpointReadyMsg(SEncoder* pEncoder, const SStreamCheckpointReadyMsg* pRsp);
+int32_t tDecodeStreamCheckpointReadyMsg(SDecoder* pDecoder, SStreamCheckpointReadyMsg* pRsp);
 
 typedef struct {
   int64_t streamId;
@@ -541,12 +527,12 @@ int32_t tDecodeStreamTaskCheckReq(SDecoder* pDecoder, SStreamTaskCheckReq* pReq)
 int32_t tEncodeStreamTaskCheckRsp(SEncoder* pEncoder, const SStreamTaskCheckRsp* pRsp);
 int32_t tDecodeStreamTaskCheckRsp(SDecoder* pDecoder, SStreamTaskCheckRsp* pRsp);
 
+int32_t tEncodeStreamDispatchReq(SEncoder* pEncoder, const SStreamDispatchReq* pReq);
 int32_t tDecodeStreamDispatchReq(SDecoder* pDecoder, SStreamDispatchReq* pReq);
+
 int32_t tDecodeStreamRetrieveReq(SDecoder* pDecoder, SStreamRetrieveReq* pReq);
 void    tDeleteStreamRetrieveReq(SStreamRetrieveReq* pReq);
 
-int32_t tInitStreamDispatchReq(SStreamDispatchReq* pReq, const SStreamTask* pTask, int32_t vgId, int32_t numOfBlocks,
-                               int64_t dstTaskId);
 void    tDeleteStreamDispatchReq(SStreamDispatchReq* pReq);
 
 int32_t streamSetupScheduleTrigger(SStreamTask* pTask);
@@ -556,8 +542,9 @@ int32_t streamProcessDispatchMsg(SStreamTask* pTask, SStreamDispatchReq* pReq, S
 int32_t streamProcessDispatchRsp(SStreamTask* pTask, SStreamDispatchRsp* pRsp, int32_t code);
 
 int32_t streamProcessRetrieveReq(SStreamTask* pTask, SStreamRetrieveReq* pReq, SRpcMsg* pMsg);
-void    streamTaskOpenUpstreamInput(SStreamTask* pTask);
+void    streamTaskOpenAllUpstreamInput(SStreamTask* pTask);
 void    streamTaskCloseUpstreamInput(SStreamTask* pTask, int32_t taskId);
+SStreamChildEpInfo * streamTaskGetUpstreamTaskEpInfo(SStreamTask* pTask, int32_t taskId);
 
 void    streamTaskInputFail(SStreamTask* pTask);
 int32_t streamTryExec(SStreamTask* pTask);
@@ -623,16 +610,16 @@ int32_t streamMetaCommit(SStreamMeta* pMeta);
 int32_t streamLoadTasks(SStreamMeta* pMeta, int64_t ver);
 
 // checkpoint
-int32_t streamProcessCheckpointSourceReq(SStreamMeta* pMeta, SStreamTask* pTask, SStreamCheckpointSourceReq* pReq);
-int32_t streamProcessCheckpointReq(SStreamTask* pTask, SStreamCheckpointReq* pReq);
-int32_t streamProcessCheckpointRsp(SStreamMeta* pMeta, SStreamTask* pTask);
+int32_t streamProcessCheckpointSourceReq(SStreamTask* pTask, SStreamCheckpointSourceReq* pReq);
+int32_t streamProcessCheckpointBlock(SStreamTask* pTask, SStreamDataBlock* pBlock);
+int32_t streamProcessCheckpointReadyMsg(SStreamTask* pTask);
 
 int32_t streamTaskReleaseState(SStreamTask* pTask);
 int32_t streamTaskReloadState(SStreamTask* pTask);
 
 int32_t streamAddCheckpointSourceRspMsg(SStreamCheckpointSourceReq* pReq, SRpcHandleInfo* pRpcInfo,
                                         SStreamTask* pTask);
-int32_t streamAddCheckpointRspMsg(SStreamCheckpointReq* pReq, SRpcHandleInfo* pRpcInfo, SStreamTask* pTask);
+int32_t streamAddCheckpointReadyMsg(SStreamTask* pTask, int32_t srcTaskId, int32_t index, int64_t checkpointId);
 
 #ifdef __cplusplus
 }
diff --git a/source/dnode/mgmt/mgmt_snode/src/smHandle.c b/source/dnode/mgmt/mgmt_snode/src/smHandle.c
index 47ff491c3f..311cbdc43b 100644
--- a/source/dnode/mgmt/mgmt_snode/src/smHandle.c
+++ b/source/dnode/mgmt/mgmt_snode/src/smHandle.c
@@ -80,7 +80,6 @@ SArray *smGetMsgHandles() {
   if (dmSetMgmtHandle(pArray, TDMT_STREAM_TASK_CHECK_RSP, smPutNodeMsgToStreamQueue, 1) == NULL) goto _OVER;
   if (dmSetMgmtHandle(pArray, TDMT_STREAM_SCAN_HISTORY_FINISH, smPutNodeMsgToStreamQueue, 1) == NULL) goto _OVER;
   if (dmSetMgmtHandle(pArray, TDMT_VND_STREAM_CHECK_POINT_SOURCE, smPutNodeMsgToMgmtQueue, 1) == NULL) goto _OVER;
-  if (dmSetMgmtHandle(pArray, TDMT_STREAM_TASK_CHECKPOINT, smPutNodeMsgToStreamQueue, 1) == NULL) goto _OVER;
 
   code = 0;
 _OVER:
diff --git a/source/dnode/mgmt/mgmt_vnode/src/vmHandle.c b/source/dnode/mgmt/mgmt_vnode/src/vmHandle.c
index 70ce6f5c28..ebcb13e75b 100644
--- a/source/dnode/mgmt/mgmt_vnode/src/vmHandle.c
+++ b/source/dnode/mgmt/mgmt_vnode/src/vmHandle.c
@@ -751,8 +751,7 @@ SArray *vmGetMsgHandles() {
   if (dmSetMgmtHandle(pArray, TDMT_STREAM_TASK_PAUSE, vmPutMsgToWriteQueue, 0) == NULL) goto _OVER;
   if (dmSetMgmtHandle(pArray, TDMT_STREAM_TASK_RESUME, vmPutMsgToWriteQueue, 0) == NULL) goto _OVER;
   if (dmSetMgmtHandle(pArray, TDMT_VND_STREAM_CHECK_POINT_SOURCE, vmPutMsgToStreamQueue, 0) == NULL) goto _OVER;
-  if (dmSetMgmtHandle(pArray, TDMT_STREAM_TASK_CHECKPOINT, vmPutMsgToStreamQueue, 0) == NULL) goto _OVER;
-  if (dmSetMgmtHandle(pArray, TDMT_STREAM_TASK_CHECKPOINT_RSP, vmPutMsgToStreamQueue, 0) == NULL) goto _OVER;
+  if (dmSetMgmtHandle(pArray, TDMT_STREAM_TASK_CHECKPOINT_READY, vmPutMsgToStreamQueue, 0) == NULL) goto _OVER;
 
   if (dmSetMgmtHandle(pArray, TDMT_VND_ALTER_REPLICA, vmPutMsgToMgmtQueue, 0) == NULL) goto _OVER;
   if (dmSetMgmtHandle(pArray, TDMT_VND_ALTER_CONFIG, vmPutMsgToWriteQueue, 0) == NULL) goto _OVER;
diff --git a/source/dnode/vnode/src/inc/vnodeInt.h b/source/dnode/vnode/src/inc/vnodeInt.h
index 198086b4b6..922bd35e23 100644
--- a/source/dnode/vnode/src/inc/vnodeInt.h
+++ b/source/dnode/vnode/src/inc/vnodeInt.h
@@ -221,8 +221,7 @@ int     tqRegisterPushHandle(STQ* pTq, void* handle, SRpcMsg* pMsg);
 int     tqUnregisterPushHandle(STQ* pTq, void* pHandle);
 int     tqStartStreamTasks(STQ* pTq);  // restore all stream tasks after vnode launching completed.
 int32_t tqProcessStreamCheckPointSourceReq(STQ* pTq, SRpcMsg* pMsg);
-int32_t tqProcessStreamCheckPointReq(STQ* pTq, SRpcMsg* pMsg);
-int32_t tqProcessStreamCheckPointRsp(STQ* pTq, SRpcMsg* pMsg);
+int32_t tqProcessStreamTaskCheckpointReadyMsg(STQ* pTq, SRpcMsg* pMsg);
 int32_t tqCheckStreamStatus(STQ* pTq);
 
 int     tqCommit(STQ*);
diff --git a/source/dnode/vnode/src/tq/tq.c b/source/dnode/vnode/src/tq/tq.c
index 84ab014597..354e210ec1 100644
--- a/source/dnode/vnode/src/tq/tq.c
+++ b/source/dnode/vnode/src/tq/tq.c
@@ -833,8 +833,6 @@ int32_t tqExpandTask(STQ* pTq, SStreamTask* pTask, int64_t ver) {
     qSetTaskId(pTask->exec.pExecutor, pTask->id.taskId, pTask->id.streamId);
   }
 
-  pTask->pRpcMsgList = taosArrayInit(4, sizeof(SRpcMsg));
-
   // sink
   if (pTask->outputType == TASK_OUTPUT__SMA) {
     pTask->smaSink.vnode = pTq->pVnode;
@@ -865,7 +863,7 @@ int32_t tqExpandTask(STQ* pTq, SStreamTask* pTask, int64_t ver) {
     pTask->exec.pWalReader = walOpenReader(pTq->pVnode->pWal, &cond);
   }
 
-  streamTaskOpenUpstreamInput(pTask);
+  streamTaskOpenAllUpstreamInput(pTask);
   streamSetupScheduleTrigger(pTask);
   SCheckpointInfo* pChkInfo = &pTask->chkInfo;
 
@@ -1276,13 +1274,13 @@ int32_t tqProcessTaskRunReq(STQ* pTq, SRpcMsg* pMsg) {
   // even in halt status, the data in inputQ must be processed
   int8_t status = pTask->status.taskStatus;
   if (status == TASK_STATUS__NORMAL || status == TASK_STATUS__HALT || status == TASK_STATUS__CK) {
-    tqDebug("vgId:%d s-task:%s start to process block from inputQ, last chk point:%" PRId64, vgId, pTask->id.idStr,
-            pTask->chkInfo.checkpointVer);
+    tqDebug("vgId:%d s-task:%s start to process block from inputQ, status:%s, checkpointVer:%" PRId64, vgId,
+            pTask->id.idStr, streamGetTaskStatusStr(status), pTask->chkInfo.checkpointVer);
     streamProcessRunReq(pTask);
   } else {
     atomic_store_8(&pTask->status.schedStatus, TASK_SCHED_STATUS__INACTIVE);
     tqDebug("vgId:%d s-task:%s ignore run req since not in ready state, status:%s, sched-status:%d", vgId,
-            pTask->id.idStr, streamGetTaskStatusStr(pTask->status.taskStatus), pTask->status.schedStatus);
+            pTask->id.idStr, streamGetTaskStatusStr(status), pTask->status.schedStatus);
   }
 
   streamMetaReleaseTask(pTq->pStreamMeta, pTask);
@@ -1531,7 +1529,7 @@ int32_t tqProcessStreamCheckPointSourceReq(STQ* pTq, SRpcMsg* pMsg) {
     code = TSDB_CODE_MSG_DECODE_ERROR;
     tDecoderClear(&decoder);
     tqError("vgId:%d failed to decode checkpoint source msg, code:%s", vgId, tstrerror(code));
-    goto FAIL;
+    return code;
   }
   tDecoderClear(&decoder);
 
@@ -1540,12 +1538,12 @@ int32_t tqProcessStreamCheckPointSourceReq(STQ* pTq, SRpcMsg* pMsg) {
   if (pTask == NULL) {
     tqError("vgId:%d failed to find s-task:0x%x, ignore checkpoint msg. it may have been destroyed already", vgId,
             req.taskId);
-    goto FAIL;
+    return TSDB_CODE_SUCCESS;
   }
 
   code = streamAddCheckpointSourceRspMsg(&req, &pMsg->info, pTask);
   if (code != TSDB_CODE_SUCCESS) {
-    goto FAIL;
+    return code;
   }
 
   // todo: when generating checkpoint, no new tasks are allowed to add into current Vnode
@@ -1561,67 +1559,27 @@ int32_t tqProcessStreamCheckPointSourceReq(STQ* pTq, SRpcMsg* pMsg) {
   total = taosArrayGetSize(pMeta->pTaskList);
   taosWUnLockLatch(&pMeta->lock);
 
-  qDebug("s-task:%s level:%d receive the checkpoint msg id:%" PRId64 " from mnode, total source checkpoint req:%d",
+  qDebug("s-task:%s level:%d receive checkpoint source msg from mnode id:%" PRId64 ", total source checkpoint req:%d",
          pTask->id.idStr, pTask->info.taskLevel, req.checkpointId, total);
 
-  streamProcessCheckpointSourceReq(pMeta, pTask, &req);
-  streamMetaReleaseTask(pMeta, pTask);
-  return code;
-
-FAIL:
-  return code;
-}
-
-int32_t tqProcessStreamCheckPointReq(STQ* pTq, SRpcMsg* pMsg) {
-  char*        msg = POINTER_SHIFT(pMsg->pCont, sizeof(SMsgHead));
-  int32_t      len = pMsg->contLen - sizeof(SMsgHead);
-  int32_t      code = 0;
-  int32_t      vgId = TD_VID(pTq->pVnode);
-  SStreamMeta* pMeta = pTq->pStreamMeta;
-
-  SStreamCheckpointReq req = {0};
-
-  SDecoder decoder;
-  tDecoderInit(&decoder, (uint8_t*)msg, len);
-  if (tDecodeStreamCheckpointReq(&decoder, &req) < 0) {
-    code = TSDB_CODE_MSG_DECODE_ERROR;
-    tDecoderClear(&decoder);
-    return code;
-  }
-  tDecoderClear(&decoder);
-
-  SStreamTask* pTask = streamMetaAcquireTask(pMeta, req.downstreamTaskId);
-  if (pTask == NULL) {
-    tqError("vgId:%d failed to find s-task:0x%x , it may have been destroyed already", vgId, req.downstreamTaskId);
-    return TSDB_CODE_SUCCESS;
-  }
-
-  code = streamAddCheckpointRspMsg(&req, &pMsg->info, pTask);
-  if (code != TSDB_CODE_SUCCESS) {
-    streamMetaReleaseTask(pMeta, pTask);
-    return code;
-  }
-
-  streamProcessCheckpointReq(pTask, &req);
+  streamProcessCheckpointSourceReq(pTask, &req);
   streamMetaReleaseTask(pMeta, pTask);
   return code;
 }
 
-// downstream task has complete the stream task checkpoint procedure
-int32_t tqProcessStreamCheckPointRsp(STQ* pTq, SRpcMsg* pMsg) {
-  // if this task is an agg task, rsp this message to upstream directly.
-  // if this task is an source task, send source rsp to mnode
+// downstream task has complete the stream task checkpoint procedure, let's start the handle the rsp by execute task
+int32_t tqProcessStreamTaskCheckpointReadyMsg(STQ* pTq, SRpcMsg* pMsg) {
   int32_t      vgId = TD_VID(pTq->pVnode);
   SStreamMeta* pMeta = pTq->pStreamMeta;
   char*        msg = POINTER_SHIFT(pMsg->pCont, sizeof(SMsgHead));
   int32_t      len = pMsg->contLen - sizeof(SMsgHead);
   int32_t      code = 0;
 
-  SStreamCheckpointRsp req = {0};
+  SStreamCheckpointReadyMsg req = {0};
 
   SDecoder decoder;
   tDecoderInit(&decoder, (uint8_t*)msg, len);
-  if (tDecodeStreamCheckpointRsp(&decoder, &req) < 0) {
+  if (tDecodeStreamCheckpointReadyMsg(&decoder, &req) < 0) {
     code = TSDB_CODE_MSG_DECODE_ERROR;
     tDecoderClear(&decoder);
     return code;
@@ -1630,13 +1588,13 @@ int32_t tqProcessStreamCheckPointRsp(STQ* pTq, SRpcMsg* pMsg) {
 
   SStreamTask* pTask = streamMetaAcquireTask(pMeta, req.upstreamTaskId);
   if (pTask == NULL) {
-    tqError("vgId:%d failed to find s-task:0x%x , it may have been destroyed already", vgId, req.downstreamTaskId);
+    tqError("vgId:%d failed to find s-task:0x%x, it may have been destroyed already", vgId, req.downstreamTaskId);
     return code;
   }
 
-  tqDebug("vgId:%d s-task:%s received the checkpoint rsp, handle it", vgId, pTask->id.idStr);
+  tqDebug("vgId:%d s-task:%s received the checkpoint ready msg, handle it", vgId, pTask->id.idStr);
 
-  streamProcessCheckpointRsp(pMeta, pTask);
+  streamProcessCheckpointReadyMsg(pTask);
   streamMetaReleaseTask(pMeta, pTask);
   return code;
 }
diff --git a/source/dnode/vnode/src/vnd/vnodeSvr.c b/source/dnode/vnode/src/vnd/vnodeSvr.c
index 1bacc257d0..1c159ce534 100644
--- a/source/dnode/vnode/src/vnd/vnodeSvr.c
+++ b/source/dnode/vnode/src/vnd/vnodeSvr.c
@@ -673,10 +673,8 @@ int32_t vnodeProcessStreamMsg(SVnode *pVnode, SRpcMsg *pMsg, SQueueInfo *pInfo)
       return tqProcessTaskRecoverFinishRsp(pVnode->pTq, pMsg);
     case TDMT_VND_STREAM_CHECK_POINT_SOURCE:
       return tqProcessStreamCheckPointSourceReq(pVnode->pTq, pMsg);
-    case TDMT_STREAM_TASK_CHECKPOINT:
-      return tqProcessStreamCheckPointReq(pVnode->pTq, pMsg);
-    case TDMT_STREAM_TASK_CHECKPOINT_RSP:
-      return tqProcessStreamCheckPointRsp(pVnode->pTq, pMsg);
+    case TDMT_STREAM_TASK_CHECKPOINT_READY:
+      return tqProcessStreamTaskCheckpointReadyMsg(pVnode->pTq, pMsg);
     default:
       vError("unknown msg type:%d in stream queue", pMsg->msgType);
       return TSDB_CODE_APP_ERROR;
diff --git a/source/libs/stream/inc/streamInt.h b/source/libs/stream/inc/streamInt.h
index e7f13a4338..d732ec2876 100644
--- a/source/libs/stream/inc/streamInt.h
+++ b/source/libs/stream/inc/streamInt.h
@@ -50,13 +50,12 @@ int32_t tEncodeStreamRetrieveReq(SEncoder* pEncoder, const SStreamRetrieveReq* p
 
 int32_t streamSaveTasks(SStreamMeta* pMeta, int64_t checkpointId);
 int32_t streamDispatchCheckMsg(SStreamTask* pTask, const SStreamTaskCheckReq* pReq, int32_t nodeId, SEpSet* pEpSet);
-int32_t streamTaskDispatchCheckpointMsg(SStreamTask* pTask, uint64_t checkpointId);
 
-int32_t streamTaskSendCheckpointRsp(SStreamTask* pTask);
+int32_t streamTaskSendCheckpointReadyMsg(SStreamTask* pTask);
 int32_t streamTaskSendCheckpointSourceRsp(SStreamTask* pTask);
 int32_t streamTaskGetNumOfDownstream(const SStreamTask* pTask);
 
-int32_t extractBlocksFromInputQ(SStreamTask* pTask, SStreamQueueItem** pInput, int32_t* numOfBlocks, const char* id);
+int32_t extractBlocksFromInputQ(SStreamTask* pTask, SStreamQueueItem** pInput, int32_t* numOfBlocks);
 SStreamQueueItem* streamMergeQueueItem(SStreamQueueItem* dst, SStreamQueueItem* pElem);
 
 #ifdef __cplusplus
diff --git a/source/libs/stream/src/stream.c b/source/libs/stream/src/stream.c
index f1a6d7423c..b53d6e9d1c 100644
--- a/source/libs/stream/src/stream.c
+++ b/source/libs/stream/src/stream.c
@@ -143,10 +143,10 @@ int32_t streamSchedExec(SStreamTask* pTask) {
   return 0;
 }
 
-int32_t streamTaskEnqueueBlocks(SStreamTask* pTask, const SStreamDispatchReq* pReq, SRpcMsg* pRsp) {
+static int32_t streamTaskAppendInputBlocks(SStreamTask* pTask, const SStreamDispatchReq* pReq, SRpcMsg* pRsp) {
   int8_t status = 0;
 
-  SStreamDataBlock* pBlock = createStreamBlockFromDispatchMsg(pReq, STREAM_INPUT__DATA_BLOCK, pReq->dataSrcVgId);
+  SStreamDataBlock* pBlock = createStreamBlockFromDispatchMsg(pReq, pReq->type, pReq->srcVgId);
   if (pBlock == NULL) {
     streamTaskInputFail(pTask);
     status = TASK_INPUT_STATUS__FAILED;
@@ -239,9 +239,12 @@ int32_t streamProcessDispatchMsg(SStreamTask* pTask, SStreamDispatchReq* pReq, S
   qDebug("s-task:%s receive dispatch msg from taskId:0x%x(vgId:%d), msgLen:%" PRId64, pTask->id.idStr,
          pReq->upstreamTaskId, pReq->upstreamNodeId, pReq->totalLen);
 
-  // todo: if current task has received the checkpoint req from the upstream t#1, the msg from t#1 should all blocked
+  // Current task has received the checkpoint req from the upstream task, from which the message should all be blocked
+  if (pReq->type == STREAM_INPUT__CHECKPOINT_TRIGGER) {
+    streamTaskCloseUpstreamInput(pTask, pReq->upstreamTaskId);
+  }
 
-  streamTaskEnqueueBlocks(pTask, pReq, pRsp);
+  streamTaskAppendInputBlocks(pTask, pReq, pRsp);
   tDeleteStreamDispatchReq(pReq);
 
   if (exec) {
@@ -322,7 +325,8 @@ int32_t tAppendDataToInputQueue(SStreamTask* pTask, SStreamQueueItem* pItem) {
     }
   } else if (type == STREAM_INPUT__CHECKPOINT || type == STREAM_INPUT__CHECKPOINT_TRIGGER) {
     taosWriteQitem(pTask->inputQueue->queue, pItem);
-    qDebug("s-task:%s checkpoint enqueue, current(blocks:%d, size:%.2fMiB)", pTask->id.idStr, total, size);
+    qDebug("s-task:%s level:%d checkpoint(trigger) enqueue inputQ, current(blocks:%d, size:%.2fMiB)", pTask->id.idStr,
+           pTask->info.taskLevel, total, size);
   } else if (type == STREAM_INPUT__GET_RES) {  // use the default memory limit, refactor later.
     taosWriteQitem(pTask->inputQueue->queue, pItem);
     qDebug("s-task:%s data res enqueue, current(blocks:%d, size:%.2fMiB)", pTask->id.idStr, total, size);
@@ -357,25 +361,33 @@ void* streamQueueNextItem(SStreamQueue* pQueue) {
 
 void streamTaskInputFail(SStreamTask* pTask) { atomic_store_8(&pTask->inputStatus, TASK_INPUT_STATUS__FAILED); }
 
-void streamTaskOpenUpstreamInput(SStreamTask* pTask) {
+void streamTaskOpenAllUpstreamInput(SStreamTask* pTask) {
   int32_t num = taosArrayGetSize(pTask->pUpstreamInfoList);
   if (num == 0) {
     return;
   }
 
   for(int32_t i = 0; i < num; ++i) {
-    SStreamChildEpInfo* pInfo = taosArrayGet(pTask->pUpstreamInfoList, i);
+    SStreamChildEpInfo* pInfo = taosArrayGetP(pTask->pUpstreamInfoList, i);
     pInfo->dataAllowed = true;
   }
 }
 
 void streamTaskCloseUpstreamInput(SStreamTask* pTask, int32_t taskId) {
+  SStreamChildEpInfo* pInfo = streamTaskGetUpstreamTaskEpInfo(pTask, taskId);
+  if (pInfo != NULL) {
+    pInfo->dataAllowed = false;
+  }
+}
+
+SStreamChildEpInfo * streamTaskGetUpstreamTaskEpInfo(SStreamTask* pTask, int32_t taskId) {
   int32_t num = taosArrayGetSize(pTask->pUpstreamInfoList);
   for(int32_t i = 0; i < num; ++i) {
-    SStreamChildEpInfo* pInfo = taosArrayGet(pTask->pUpstreamInfoList, i);
+    SStreamChildEpInfo* pInfo = taosArrayGetP(pTask->pUpstreamInfoList, i);
     if (pInfo->taskId == taskId) {
-      pInfo->dataAllowed = false;
-      break;
+      return pInfo;
     }
   }
+
+  return NULL;
 }
\ No newline at end of file
diff --git a/source/libs/stream/src/streamCheckpoint.c b/source/libs/stream/src/streamCheckpoint.c
index 839822c103..772500bc80 100644
--- a/source/libs/stream/src/streamCheckpoint.c
+++ b/source/libs/stream/src/streamCheckpoint.c
@@ -61,7 +61,7 @@ int32_t tDecodeStreamCheckpointSourceRsp(SDecoder* pDecoder, SStreamCheckpointSo
   return 0;
 }
 
-int32_t tEncodeStreamCheckpointReq(SEncoder* pEncoder, const SStreamCheckpointReq* pReq) {
+int32_t tEncodeStreamCheckpointReadyMsg(SEncoder* pEncoder, const SStreamCheckpointReadyMsg* pReq) {
   if (tStartEncode(pEncoder) < 0) return -1;
   if (tEncodeI64(pEncoder, pReq->streamId) < 0) return -1;
   if (tEncodeI64(pEncoder, pReq->checkpointId) < 0) return -1;
@@ -74,33 +74,7 @@ int32_t tEncodeStreamCheckpointReq(SEncoder* pEncoder, const SStreamCheckpointRe
   return pEncoder->pos;
 }
 
-int32_t tDecodeStreamCheckpointReq(SDecoder* pDecoder, SStreamCheckpointReq* pReq) {
-  if (tStartDecode(pDecoder) < 0) return -1;
-  if (tDecodeI64(pDecoder, &pReq->streamId) < 0) return -1;
-  if (tDecodeI64(pDecoder, &pReq->checkpointId) < 0) return -1;
-  if (tDecodeI32(pDecoder, &pReq->downstreamTaskId) < 0) return -1;
-  if (tDecodeI32(pDecoder, &pReq->downstreamNodeId) < 0) return -1;
-  if (tDecodeI32(pDecoder, &pReq->upstreamTaskId) < 0) return -1;
-  if (tDecodeI32(pDecoder, &pReq->upstreamNodeId) < 0) return -1;
-  if (tDecodeI32(pDecoder, &pReq->childId) < 0) return -1;
-  tEndDecode(pDecoder);
-  return 0;
-}
-
-int32_t tEncodeStreamCheckpointRsp(SEncoder* pEncoder, const SStreamCheckpointRsp* pRsp) {
-  if (tStartEncode(pEncoder) < 0) return -1;
-  if (tEncodeI64(pEncoder, pRsp->streamId) < 0) return -1;
-  if (tEncodeI64(pEncoder, pRsp->checkpointId) < 0) return -1;
-  if (tEncodeI32(pEncoder, pRsp->downstreamTaskId) < 0) return -1;
-  if (tEncodeI32(pEncoder, pRsp->downstreamNodeId) < 0) return -1;
-  if (tEncodeI32(pEncoder, pRsp->upstreamTaskId) < 0) return -1;
-  if (tEncodeI32(pEncoder, pRsp->upstreamNodeId) < 0) return -1;
-  if (tEncodeI32(pEncoder, pRsp->childId) < 0) return -1;
-  tEndEncode(pEncoder);
-  return pEncoder->pos;
-}
-
-int32_t tDecodeStreamCheckpointRsp(SDecoder* pDecoder, SStreamCheckpointRsp* pRsp) {
+int32_t tDecodeStreamCheckpointReadyMsg(SDecoder* pDecoder, SStreamCheckpointReadyMsg* pRsp) {
   if (tStartDecode(pDecoder) < 0) return -1;
   if (tDecodeI64(pDecoder, &pRsp->streamId) < 0) return -1;
   if (tDecodeI64(pDecoder, &pRsp->checkpointId) < 0) return -1;
@@ -113,7 +87,7 @@ int32_t tDecodeStreamCheckpointRsp(SDecoder* pDecoder, SStreamCheckpointRsp* pRs
   return 0;
 }
 
-static int32_t streamAlignCheckpoint(SStreamTask* pTask, int64_t checkpointId, int32_t childId) {
+static int32_t streamAlignCheckpoint(SStreamTask* pTask) {
   int32_t num = taosArrayGetSize(pTask->pUpstreamInfoList);
   int64_t old = atomic_val_compare_exchange_32(&pTask->checkpointAlignCnt, 0, num);
   if (old == 0) {
@@ -124,19 +98,27 @@ static int32_t streamAlignCheckpoint(SStreamTask* pTask, int64_t checkpointId, i
 }
 
 static int32_t appendCheckpointIntoInputQ(SStreamTask* pTask, int32_t checkpointType) {
-  SStreamCheckpoint* pChkpoint = taosAllocateQitem(sizeof(SStreamCheckpoint), DEF_QITEM, sizeof(SSDataBlock));
+  SStreamDataBlock* pChkpoint = taosAllocateQitem(sizeof(SStreamDataBlock), DEF_QITEM, sizeof(SSDataBlock));
   if (pChkpoint == NULL) {
     return TSDB_CODE_OUT_OF_MEMORY;
   }
 
   pChkpoint->type = checkpointType;
-  pChkpoint->pBlock = taosMemoryCalloc(1, sizeof(SSDataBlock));
-  if (pChkpoint->pBlock == NULL) {
+
+  SSDataBlock* pBlock = taosMemoryCalloc(1, sizeof(SSDataBlock));
+  if (pBlock == NULL) {
     taosFreeQitem(pChkpoint);
     return TSDB_CODE_OUT_OF_MEMORY;
   }
 
-  pChkpoint->pBlock->info.type = STREAM_CHECKPOINT;
+  pBlock->info.type = STREAM_CHECKPOINT;
+  pBlock->info.version = pTask->checkpointingId;
+  pBlock->info.rows = 1;
+  pBlock->info.childId = pTask->info.selfChildId;
+
+  pChkpoint->blocks = taosArrayInit(4, sizeof(SSDataBlock));//pBlock;
+  taosArrayPush(pChkpoint->blocks, pBlock);
+
   if (tAppendDataToInputQueue(pTask, (SStreamQueueItem*)pChkpoint) < 0) {
     taosFreeQitem(pChkpoint);
     return TSDB_CODE_OUT_OF_MEMORY;
@@ -146,56 +128,72 @@ static int32_t appendCheckpointIntoInputQ(SStreamTask* pTask, int32_t checkpoint
   return TSDB_CODE_SUCCESS;
 }
 
-int32_t streamProcessCheckpointSourceReq(SStreamMeta* pMeta, SStreamTask* pTask, SStreamCheckpointSourceReq* pReq) {
-  int32_t code = 0;
+int32_t streamProcessCheckpointSourceReq(SStreamTask* pTask, SStreamCheckpointSourceReq* pReq) {
   ASSERT(pTask->info.taskLevel == TASK_LEVEL__SOURCE);
 
   // 1. set task status to be prepared for check point, no data are allowed to put into inputQ.
   pTask->status.taskStatus = TASK_STATUS__CK;
-  pTask->checkpointNotReadyTasks = 1;
   pTask->checkpointingId = pReq->checkpointId;
+  pTask->checkpointNotReadyTasks = 1;
 
   // 2. let's dispatch checkpoint msg to downstream task directly and do nothing else.
   // 2. put the checkpoint block into inputQ, to make sure all blocks with less version have been handled by this task already.
-  appendCheckpointIntoInputQ(pTask, STREAM_INPUT__CHECKPOINT_TRIGGER);
-  streamSchedExec(pTask);
-  return code;
+  return appendCheckpointIntoInputQ(pTask, STREAM_INPUT__CHECKPOINT_TRIGGER);
 }
 
-int32_t streamProcessCheckpointReq(SStreamTask* pTask, SStreamCheckpointReq* pReq) {
-  int64_t checkpointId = pReq->checkpointId;
-  int32_t childId = pReq->childId;
+int32_t streamProcessCheckpointBlock(SStreamTask* pTask, SStreamDataBlock* pBlock) {
+  SSDataBlock* pDataBlock = taosArrayGet(pBlock->blocks, 0);
+  int64_t checkpointId = pDataBlock->info.version;
 
   // set the task status
   pTask->checkpointingId = checkpointId;
   pTask->status.taskStatus = TASK_STATUS__CK;
 
   //todo fix race condition: set the status and append checkpoint block
+  int32_t taskLevel = pTask->info.taskLevel;
+  if (taskLevel == TASK_LEVEL__SOURCE) {
+    if (pTask->outputType == TASK_OUTPUT__FIXED_DISPATCH || pTask->outputType == TASK_OUTPUT__SHUFFLE_DISPATCH) {
+      pBlock->srcTaskId = pTask->id.taskId;
+      pBlock->srcVgId = pTask->pMeta->vgId;
 
-  ASSERT(pTask->info.taskLevel == TASK_LEVEL__AGG || pTask->info.taskLevel == TASK_LEVEL__SINK);
+      qDebug("s-task:%s set childIdx:%d, and add checkpoint block into outputQ", pTask->id.idStr,
+             pTask->info.selfChildId);
 
-  if (pTask->info.taskLevel == TASK_LEVEL__SINK) {
+      int32_t code = taosWriteQitem(pTask->outputQueue->queue, pBlock);
+      if (code != 0) {  // todo failed to add it into the output queue, free it.
+        return code;
+      }
+
+      streamFreeQitem((SStreamQueueItem*)pBlock);
+      streamDispatchStreamBlock(pTask);
+    } else {  // only one task exists
+      streamProcessCheckpointReadyMsg(pTask);
+    }
+  } else if (taskLevel == TASK_LEVEL__SINK) {
     // todo: sink node needs alignment??
-    appendCheckpointIntoInputQ(pTask, STREAM_INPUT__CHECKPOINT);
-    streamSchedExec(pTask);
-    qDebug("s-task:%s sink task set to checkpoint ready, start to send rsp to upstream", pTask->id.idStr);
+    ASSERT(pTask->status.taskStatus == TASK_STATUS__CK);
+    pTask->status.taskStatus = TASK_STATUS__CK_READY;
+
+    // update the child Id for downstream tasks
+    streamAddCheckpointReadyMsg(pTask, pBlock->srcTaskId, pTask->info.selfChildId, checkpointId);
+    qDebug("s-task:%s sink task do checkpoint ready, send ready msg to upstream", pTask->id.idStr);
   } else {
     ASSERT(taosArrayGetSize(pTask->pUpstreamInfoList) > 0);
 
-    // close the inputQ for data from upstream task.
-    streamTaskCloseUpstreamInput(pTask, pReq->upstreamTaskId);
+    // update the child Id for downstream tasks
+    streamAddCheckpointReadyMsg(pTask, pBlock->srcTaskId, pTask->info.selfChildId, checkpointId);
 
     // there are still some upstream tasks not send checkpoint request, do nothing and wait for then
-    int32_t notReady = streamAlignCheckpoint(pTask, checkpointId, childId);
+    int32_t notReady = streamAlignCheckpoint(pTask);
     int32_t num = taosArrayGetSize(pTask->pUpstreamInfoList);
     if (notReady > 0) {
-      qDebug("s-task:%s received checkpoint req, %d upstream tasks not send checkpoint info yet, total:%d",
-             pTask->id.idStr, notReady, num);
+      qDebug("s-task:%s received checkpoint block, idx:%d, %d upstream tasks not send checkpoint info yet, total:%d",
+             pTask->id.idStr, pTask->info.selfChildId, notReady, num);
       return 0;
     }
 
     qDebug(
-        "s-task:%s receive one checkpoint req, all %d upstream sent checkpoint msgs, dispatch checkpoint msg to "
+        "s-task:%s receive one checkpoint block, all %d upstream sent checkpoint msgs, dispatch checkpoint msg to "
         "downstream",
         pTask->id.idStr, num);
 
@@ -206,8 +204,20 @@ int32_t streamProcessCheckpointReq(SStreamTask* pTask, SStreamCheckpointReq* pRe
     // if all upstreams are ready for generating checkpoint, set the status to be TASK_STATUS__CK_READY
     // put the checkpoint block into inputQ, to make sure all blocks with less version have been handled by this task
     // already. And then, dispatch check point msg to all downstream tasks
-    appendCheckpointIntoInputQ(pTask, STREAM_INPUT__CHECKPOINT_TRIGGER);
-    streamSchedExec(pTask);
+
+    {
+      pBlock->srcTaskId = pTask->id.taskId;
+      pBlock->srcVgId = pTask->pMeta->vgId;
+
+      ASSERT(pTask->outputType == TASK_OUTPUT__FIXED_DISPATCH || pTask->outputType == TASK_OUTPUT__SHUFFLE_DISPATCH);
+      int32_t code = taosWriteQitem(pTask->outputQueue->queue, pBlock);
+      if (code != 0) {  // todo failed to add it into the output queue, free it.
+        return code;
+      }
+
+      streamFreeQitem((SStreamQueueItem*)pBlock);
+      streamDispatchStreamBlock(pTask);
+    }
   }
 
   return 0;
@@ -217,16 +227,17 @@ int32_t streamProcessCheckpointReq(SStreamTask* pTask, SStreamCheckpointReq* pRe
  * All down stream tasks have successfully completed the check point task.
  * Current stream task is allowed to start to do checkpoint things in ASYNC model.
  */
-int32_t streamProcessCheckpointRsp(SStreamMeta* pMeta, SStreamTask* pTask) {
+int32_t streamProcessCheckpointReadyMsg(SStreamTask* pTask) {
   ASSERT(pTask->info.taskLevel == TASK_LEVEL__SOURCE || pTask->info.taskLevel == TASK_LEVEL__AGG);
 
   // only when all downstream tasks are send checkpoint rsp, we can start the checkpoint procedure for the agg task
   int32_t notReady = atomic_sub_fetch_32(&pTask->checkpointNotReadyTasks, 1);
+  ASSERT(notReady >= 0);
+
   if (notReady == 0) {
     qDebug("s-task:%s all downstream tasks have completed the checkpoint, start to do checkpoint for current task",
            pTask->id.idStr);
     appendCheckpointIntoInputQ(pTask, STREAM_INPUT__CHECKPOINT);
-    streamSchedExec(pTask);
   } else {
     int32_t total = streamTaskGetNumOfDownstream(pTask);
     qDebug("s-task:%s %d/%d downstream tasks are not ready, wait", pTask->id.idStr, notReady, total);
diff --git a/source/libs/stream/src/streamData.c b/source/libs/stream/src/streamData.c
index f8eb6ef069..1080b67a63 100644
--- a/source/libs/stream/src/streamData.c
+++ b/source/libs/stream/src/streamData.c
@@ -23,6 +23,7 @@ SStreamDataBlock* createStreamBlockFromDispatchMsg(const SStreamDispatchReq* pRe
 
   pData->type = blockType;
   pData->srcVgId = srcVg;
+  pData->srcTaskId = pReq->upstreamTaskId;
 
   int32_t blockNum = pReq->blockNum;
   SArray* pArray = taosArrayInit_s(sizeof(SSDataBlock), blockNum);
@@ -59,16 +60,15 @@ SStreamDataBlock* createStreamBlockFromResults(SStreamQueueItem* pItem, SStreamT
     return NULL;
   }
 
+  pStreamBlocks->srcTaskId = pTask->id.taskId;
   pStreamBlocks->type = STREAM_INPUT__DATA_BLOCK;
   pStreamBlocks->blocks = pRes;
 
   if (pItem->type == STREAM_INPUT__DATA_SUBMIT) {
     SStreamDataSubmit* pSubmit = (SStreamDataSubmit*)pItem;
-    pStreamBlocks->childId = pTask->info.selfChildId;
     pStreamBlocks->sourceVer = pSubmit->ver;
   } else if (pItem->type == STREAM_INPUT__MERGED_SUBMIT) {
     SStreamMergedSubmit* pMerged = (SStreamMergedSubmit*)pItem;
-    pStreamBlocks->childId = pTask->info.selfChildId;
     pStreamBlocks->sourceVer = pMerged->ver;
   }
 
diff --git a/source/libs/stream/src/streamDispatch.c b/source/libs/stream/src/streamDispatch.c
index f246a781c6..9790762c0e 100644
--- a/source/libs/stream/src/streamDispatch.c
+++ b/source/libs/stream/src/streamDispatch.c
@@ -26,8 +26,13 @@ typedef struct SBlockName {
   char     parTbName[TSDB_TABLE_NAME_LEN];
 } SBlockName;
 
+typedef struct {
+  int32_t taskId;
+  SRpcMsg msg;
+  SEpSet  epset;
+} SStreamChkptReadyInfo;
+
 static void    doRetryDispatchData(void* param, void* tmrId);
-static int32_t tEncodeStreamDispatchReq(SEncoder* pEncoder, const SStreamDispatchReq* pReq);
 static int32_t streamAddBlockIntoDispatchMsg(const SSDataBlock* pBlock, SStreamDispatchReq* pReq);
 static int32_t doDispatchScanHistoryFinishMsg(SStreamTask* pTask, const SStreamScanHistoryFinishReq* pReq, int32_t vgId,
                                               SEpSet* pEpSet);
@@ -46,7 +51,8 @@ int32_t tDecodeStreamDispatchReq(SDecoder* pDecoder, SStreamDispatchReq* pReq) {
   if (tDecodeI64(pDecoder, &pReq->streamId) < 0) return -1;
   if (tDecodeI32(pDecoder, &pReq->taskId) < 0) return -1;
   if (tDecodeI32(pDecoder, &pReq->upstreamTaskId) < 0) return -1;
-  if (tDecodeI32(pDecoder, &pReq->dataSrcVgId) < 0) return -1;
+  if (tDecodeI32(pDecoder, &pReq->type) < 0) return -1;
+  if (tDecodeI32(pDecoder, &pReq->srcVgId) < 0) return -1;
   if (tDecodeI32(pDecoder, &pReq->upstreamChildId) < 0) return -1;
   if (tDecodeI32(pDecoder, &pReq->upstreamNodeId) < 0) return -1;
   if (tDecodeI32(pDecoder, &pReq->blockNum) < 0) return -1;
@@ -70,15 +76,16 @@ int32_t tDecodeStreamDispatchReq(SDecoder* pDecoder, SStreamDispatchReq* pReq) {
   return 0;
 }
 
-int32_t tInitStreamDispatchReq(SStreamDispatchReq* pReq, const SStreamTask* pTask, int32_t vgId, int32_t numOfBlocks,
-                               int64_t dstTaskId) {
+static int32_t tInitStreamDispatchReq(SStreamDispatchReq* pReq, const SStreamTask* pTask, int32_t vgId,
+                                      int32_t numOfBlocks, int64_t dstTaskId, int32_t type) {
   pReq->streamId = pTask->id.streamId;
-  pReq->dataSrcVgId = vgId;
+  pReq->srcVgId = vgId;
   pReq->upstreamTaskId = pTask->id.taskId;
   pReq->upstreamChildId = pTask->info.selfChildId;
   pReq->upstreamNodeId = pTask->info.nodeId;
   pReq->blockNum = numOfBlocks;
   pReq->taskId = dstTaskId;
+  pReq->type = type;
 
   pReq->data = taosArrayInit(numOfBlocks, POINTER_BYTES);
   pReq->dataLen = taosArrayInit(numOfBlocks, sizeof(int32_t));
@@ -238,9 +245,8 @@ int32_t streamDispatchCheckMsg(SStreamTask* pTask, const SStreamTaskCheckReq* pR
   return 0;
 }
 
-static int32_t streamDispatchAllBlocks(SStreamTask* pTask, const SStreamDataBlock* pData) {
+static int32_t doDispatchAllBlocks(SStreamTask* pTask, const SStreamDataBlock* pData) {
   int32_t code = 0;
-
   int32_t numOfBlocks = taosArrayGetSize(pData->blocks);
   ASSERT(numOfBlocks != 0);
 
@@ -248,7 +254,7 @@ static int32_t streamDispatchAllBlocks(SStreamTask* pTask, const SStreamDataBloc
     SStreamDispatchReq req = {0};
 
     int32_t downstreamTaskId = pTask->fixedEpDispatcher.taskId;
-    code = tInitStreamDispatchReq(&req, pTask, pData->srcVgId, numOfBlocks, downstreamTaskId);
+    code = tInitStreamDispatchReq(&req, pTask, pData->srcVgId, numOfBlocks, downstreamTaskId, pData->type);
     if (code != TSDB_CODE_SUCCESS) {
       return code;
     }
@@ -289,7 +295,7 @@ static int32_t streamDispatchAllBlocks(SStreamTask* pTask, const SStreamDataBloc
 
     for (int32_t i = 0; i < vgSz; i++) {
       SVgroupInfo* pVgInfo = taosArrayGet(vgInfo, i);
-      code = tInitStreamDispatchReq(&pReqs[i], pTask, pData->srcVgId, 0, pVgInfo->taskId);
+      code = tInitStreamDispatchReq(&pReqs[i], pTask, pData->srcVgId, 0, pVgInfo->taskId, pData->type);
       if (code != TSDB_CODE_SUCCESS) {
         goto FAIL_SHUFFLE_DISPATCH;
       }
@@ -299,7 +305,7 @@ static int32_t streamDispatchAllBlocks(SStreamTask* pTask, const SStreamDataBloc
       SSDataBlock* pDataBlock = taosArrayGet(pData->blocks, i);
 
       // TODO: do not use broadcast
-      if (pDataBlock->info.type == STREAM_DELETE_RESULT) {
+      if (pDataBlock->info.type == STREAM_DELETE_RESULT || pDataBlock->info.type == STREAM_CHECKPOINT) {
         for (int32_t j = 0; j < vgSz; j++) {
           if (streamAddBlockIntoDispatchMsg(pDataBlock, &pReqs[j]) < 0) {
             goto FAIL_SHUFFLE_DISPATCH;
@@ -359,7 +365,7 @@ int32_t streamDispatchStreamBlock(SStreamTask* pTask) {
 
   int32_t numOfElems = taosQueueItemSize(pTask->outputQueue->queue);
   if (numOfElems > 0) {
-    qDebug("s-task:%s try to dispatch intermediate result block to downstream, elem in outputQ:%d", pTask->id.idStr,
+    qDebug("s-task:%s try to dispatch intermediate block to downstream, elem in outputQ:%d", pTask->id.idStr,
            numOfElems);
   }
 
@@ -382,12 +388,12 @@ int32_t streamDispatchStreamBlock(SStreamTask* pTask) {
   }
 
   pTask->msgInfo.pData = pBlock;
-  ASSERT(pBlock->type == STREAM_INPUT__DATA_BLOCK);
+  ASSERT(pBlock->type == STREAM_INPUT__DATA_BLOCK || pBlock->type == STREAM_INPUT__CHECKPOINT_TRIGGER);
 
   int32_t retryCount = 0;
 
   while (1) {
-    int32_t code = streamDispatchAllBlocks(pTask, pBlock);
+    int32_t code = doDispatchAllBlocks(pTask, pBlock);
     if (code == TSDB_CODE_SUCCESS) {
       break;
     }
@@ -415,81 +421,6 @@ int32_t streamDispatchStreamBlock(SStreamTask* pTask) {
   return TSDB_CODE_SUCCESS;
 }
 
-static int32_t doDispatchCheckpointMsg(SStreamTask* pTask, const SStreamCheckpointReq* pReq, int32_t nodeId,
-                                       SEpSet* pEpSet) {
-  void*   buf = NULL;
-  int32_t code = -1;
-  SRpcMsg msg = {0};
-
-  int32_t tlen;
-  tEncodeSize(tEncodeStreamCheckpointReq, pReq, tlen, code);
-  if (code < 0) {
-    return -1;
-  }
-
-  buf = rpcMallocCont(sizeof(SMsgHead) + tlen);
-  if (buf == NULL) {
-    return -1;
-  }
-
-  ((SMsgHead*)buf)->vgId = htonl(nodeId);
-  void* abuf = POINTER_SHIFT(buf, sizeof(SMsgHead));
-
-  SEncoder encoder;
-  tEncoderInit(&encoder, abuf, tlen);
-  if ((code = tEncodeStreamCheckpointReq(&encoder, pReq)) < 0) {
-    rpcFreeCont(buf);
-    return code;
-  }
-  tEncoderClear(&encoder);
-
-  initRpcMsg(&msg, TDMT_STREAM_TASK_CHECKPOINT, buf, tlen + sizeof(SMsgHead));
-  qDebug("s-task:%s (level:%d, vgId:%d) dispatch checkpoint msg to s-task:0x%" PRIx64 ":0x%x (vgId:%d)",
-         pTask->id.idStr, pTask->info.taskLevel, pTask->info.nodeId, pReq->streamId, pReq->downstreamTaskId, nodeId);
-
-  tmsgSendReq(pEpSet, &msg);
-  return 0;
-}
-
-int32_t streamTaskDispatchCheckpointMsg(SStreamTask* pTask, uint64_t checkpointId) {
-  SStreamCheckpointReq req = {
-      .streamId = pTask->id.streamId,
-      .upstreamTaskId = pTask->id.taskId,
-      .upstreamNodeId = pTask->info.nodeId,
-      .downstreamNodeId = pTask->info.nodeId,
-      .downstreamTaskId = pTask->id.taskId,
-      .childId = pTask->info.selfChildId,
-      .checkpointId = checkpointId,
-  };
-
-  // serialize
-  if (pTask->outputType == TASK_OUTPUT__FIXED_DISPATCH) {
-    req.downstreamNodeId = pTask->fixedEpDispatcher.nodeId;
-    req.downstreamTaskId = pTask->fixedEpDispatcher.taskId;
-    doDispatchCheckpointMsg(pTask, &req, pTask->fixedEpDispatcher.nodeId, &pTask->fixedEpDispatcher.epSet);
-  } else if (pTask->outputType == TASK_OUTPUT__SHUFFLE_DISPATCH) {
-    SArray* vgInfo = pTask->shuffleDispatcher.dbInfo.pVgroupInfos;
-
-    int32_t numOfVgs = taosArrayGetSize(vgInfo);
-    pTask->notReadyTasks = numOfVgs;
-    pTask->checkReqIds = taosArrayInit(numOfVgs, sizeof(int64_t));
-
-    qDebug("s-task:%s dispatch %d checkpoint msg to downstream", pTask->id.idStr, numOfVgs);
-
-    for (int32_t i = 0; i < numOfVgs; i++) {
-      SVgroupInfo* pVgInfo = taosArrayGet(vgInfo, i);
-      req.downstreamNodeId = pVgInfo->vgId;
-      req.downstreamTaskId = pVgInfo->taskId;
-      doDispatchCheckpointMsg(pTask, &req, pVgInfo->vgId, &pVgInfo->epSet);
-    }
-  } else {  // no need to dispatch msg to downstream task
-    qDebug("s-task:%s no down stream task, not dispatch checkpoint msg to downstream", pTask->id.idStr);
-    streamProcessCheckpointRsp(NULL, pTask);
-  }
-
-  return 0;
-}
-
 int32_t streamDispatchScanHistoryFinishMsg(SStreamTask* pTask) {
   SStreamScanHistoryFinishReq req = {.streamId = pTask->id.streamId, .childId = pTask->info.selfChildId};
 
@@ -514,32 +445,31 @@ int32_t streamDispatchScanHistoryFinishMsg(SStreamTask* pTask) {
 }
 
 // this function is usually invoked by sink/agg task
-int32_t streamTaskSendCheckpointRsp(SStreamTask* pTask) {
-  int32_t num = taosArrayGetSize(pTask->pRpcMsgList);
+int32_t streamTaskSendCheckpointReadyMsg(SStreamTask* pTask) {
+  int32_t num = taosArrayGetSize(pTask->pReadyMsgList);
   ASSERT(taosArrayGetSize(pTask->pUpstreamInfoList) == num);
 
-  qDebug("s-task:%s level:%d checkpoint completed msg sent to %d upstream tasks", pTask->id.idStr,
-         pTask->info.taskLevel, num);
-
   for (int32_t i = 0; i < num; ++i) {
-    SRpcMsg* pMsg = taosArrayGet(pTask->pRpcMsgList, i);
-    tmsgSendRsp(pMsg);
+    SStreamChkptReadyInfo* pInfo = taosArrayGet(pTask->pReadyMsgList, i);
+    tmsgSendReq(&pInfo->epset, &pInfo->msg);
+    qDebug("s-task:%s level:%d checkpoint ready msg sent to upstream:0x%x", pTask->id.idStr, pTask->info.taskLevel,
+           pInfo->taskId);
   }
 
-  taosArrayClear(pTask->pRpcMsgList);
-  qDebug("s-task:%s level:%d source checkpoint completed msg sent to upstream", pTask->id.idStr, pTask->info.taskLevel);
+  taosArrayClear(pTask->pReadyMsgList);
+  qDebug("s-task:%s level:%d checkpoint ready msg sent to all %d upstreams", pTask->id.idStr, pTask->info.taskLevel, num);
 
   return TSDB_CODE_SUCCESS;
 }
 
 // this function is only invoked by source task, and send rsp to mnode
 int32_t streamTaskSendCheckpointSourceRsp(SStreamTask* pTask) {
-  ASSERT(pTask->info.taskLevel == TASK_LEVEL__SOURCE && taosArrayGetSize(pTask->pRpcMsgList) == 1);
-  SRpcMsg* pMsg = taosArrayGet(pTask->pRpcMsgList, 0);
+  ASSERT(pTask->info.taskLevel == TASK_LEVEL__SOURCE && taosArrayGetSize(pTask->pReadyMsgList) == 1);
+  SStreamChkptReadyInfo* pInfo = taosArrayGet(pTask->pReadyMsgList, 0);
 
-  tmsgSendRsp(pMsg);
+  tmsgSendRsp(&pInfo->msg);
 
-  taosArrayClear(pTask->pRpcMsgList);
+  taosArrayClear(pTask->pReadyMsgList);
   qDebug("s-task:%s level:%d source checkpoint completed msg sent to mnode", pTask->id.idStr, pTask->info.taskLevel);
 
   return TSDB_CODE_SUCCESS;
@@ -550,7 +480,8 @@ int32_t tEncodeStreamDispatchReq(SEncoder* pEncoder, const SStreamDispatchReq* p
   if (tEncodeI64(pEncoder, pReq->streamId) < 0) return -1;
   if (tEncodeI32(pEncoder, pReq->taskId) < 0) return -1;
   if (tEncodeI32(pEncoder, pReq->upstreamTaskId) < 0) return -1;
-  if (tEncodeI32(pEncoder, pReq->dataSrcVgId) < 0) return -1;
+  if (tEncodeI32(pEncoder, pReq->type) < 0) return -1;
+  if (tEncodeI32(pEncoder, pReq->srcVgId) < 0) return -1;
   if (tEncodeI32(pEncoder, pReq->upstreamChildId) < 0) return -1;
   if (tEncodeI32(pEncoder, pReq->upstreamNodeId) < 0) return -1;
   if (tEncodeI32(pEncoder, pReq->blockNum) < 0) return -1;
@@ -753,7 +684,7 @@ void doRetryDispatchData(void* param, void* tmrId) {
   SStreamTask* pTask = param;
   ASSERT(pTask->outputStatus == TASK_OUTPUT_STATUS__WAIT);
 
-  int32_t code = streamDispatchAllBlocks(pTask, pTask->msgInfo.pData);
+  int32_t code = doDispatchAllBlocks(pTask, pTask->msgInfo.pData);
   if (code != TSDB_CODE_SUCCESS) {
     qDebug("s-task:%s reset the waitRspCnt to be 0 before launch retry dispatch", pTask->id.idStr);
     atomic_store_32(&pTask->shuffleDispatcher.waitingRspCnt, 0);
@@ -794,49 +725,73 @@ int32_t streamAddCheckpointSourceRspMsg(SStreamCheckpointSourceReq* pReq, SRpcHa
   tEncodeStreamCheckpointSourceRsp(&encoder, &rsp);
   tEncoderClear(&encoder);
 
-  SRpcMsg rspMsg = {.code = 0, .pCont = pBuf, .contLen = sizeof(SMsgHead) + len, .info = *pRpcInfo};
-  taosArrayPush(pTask->pRpcMsgList, &rspMsg);
+  SStreamChkptReadyInfo info = {0};
+  initRpcMsg(&info.msg, 0, pBuf, sizeof(SMsgHead) + len);
+  info.msg.info = *pRpcInfo;
 
-  qDebug("s-task:%s add checkpoint rsp msg, total:%d", pTask->id.idStr, (int32_t)taosArrayGetSize(pTask->pRpcMsgList));
+  if (pTask->pReadyMsgList == NULL) {
+    pTask->pReadyMsgList = taosArrayInit(4, sizeof(SStreamChkptReadyInfo));
+  }
+
+  taosArrayPush(pTask->pReadyMsgList, &info);
+
+  qDebug("s-task:%s add checkpoint source rsp msg, total:%d", pTask->id.idStr, (int32_t)taosArrayGetSize(pTask->pReadyMsgList));
   return TSDB_CODE_SUCCESS;
 }
 
-int32_t streamAddCheckpointRspMsg(SStreamCheckpointReq* pReq, SRpcHandleInfo* pRpcInfo, SStreamTask* pTask) {
-  int32_t  len = 0;
-  int32_t  code = 0;
-  SEncoder encoder;
+int32_t streamAddCheckpointReadyMsg(SStreamTask* pTask, int32_t upstreamTaskId, int32_t index, int64_t checkpointId) {
+  int32_t code = 0;
+  int32_t tlen = 0;
+  void*   buf = NULL;
+  if (pTask->info.taskLevel == TASK_LEVEL__SOURCE) {
+    return TSDB_CODE_SUCCESS;
+  }
 
-  SStreamCheckpointRsp rsp = {
-      .checkpointId = pReq->checkpointId,
-      .downstreamTaskId = pReq->downstreamTaskId,
-      .downstreamNodeId = pReq->downstreamNodeId,
-      .streamId = pReq->streamId,
-      .upstreamTaskId = pReq->upstreamTaskId,
-      .upstreamNodeId = pReq->upstreamNodeId,
-  };
+  SStreamChildEpInfo* pInfo = streamTaskGetUpstreamTaskEpInfo(pTask, upstreamTaskId);
 
-  tEncodeSize(tEncodeStreamCheckpointRsp, &rsp, len, code);
+  SStreamCheckpointReadyMsg req = {0};
+  req.downstreamNodeId = pTask->pMeta->vgId;
+  req.downstreamTaskId = pTask->id.taskId;
+  req.streamId = pTask->id.streamId;
+  req.checkpointId = checkpointId;
+  req.childId = pInfo->childId;
+  req.upstreamNodeId = pInfo->nodeId;
+  req.upstreamTaskId = pInfo->taskId;
+
+  tEncodeSize(tEncodeStreamCheckpointReadyMsg, &req, tlen, code);
   if (code < 0) {
+    return -1;
+  }
+
+  buf = rpcMallocCont(sizeof(SMsgHead) + tlen);
+  if (buf == NULL) {
+    return -1;
+  }
+
+  ((SMsgHead*)buf)->vgId = htonl(req.upstreamNodeId);
+  void* abuf = POINTER_SHIFT(buf, sizeof(SMsgHead));
+
+  SEncoder encoder;
+  tEncoderInit(&encoder, abuf, tlen);
+  if ((code = tEncodeStreamCheckpointReadyMsg(&encoder, &req)) < 0) {
+    rpcFreeCont(buf);
     return code;
   }
-
-  void* pBuf = rpcMallocCont(sizeof(SMsgHead) + len);
-  if (pBuf == NULL) {
-    return TSDB_CODE_OUT_OF_MEMORY;
-  }
-
-  ((SMsgHead*)pBuf)->vgId = htonl(pReq->upstreamNodeId);
-
-  void* abuf = POINTER_SHIFT(pBuf, sizeof(SMsgHead));
-
-  tEncoderInit(&encoder, (uint8_t*)abuf, len);
-  tEncodeStreamCheckpointRsp(&encoder, &rsp);
   tEncoderClear(&encoder);
 
-  SRpcMsg rspMsg = {.code = 0, .pCont = pBuf, .contLen = sizeof(SMsgHead) + len, .info = *pRpcInfo};
-  taosArrayPush(pTask->pRpcMsgList, &rspMsg);
+  ASSERT(req.upstreamTaskId != 0);
 
-  return TSDB_CODE_SUCCESS;
+  SStreamChkptReadyInfo info = {.taskId = pInfo->taskId, .epset = pInfo->epSet};
+  initRpcMsg(&info.msg, TDMT_STREAM_TASK_CHECKPOINT_READY, buf, tlen + sizeof(SMsgHead));
+  qDebug("s-task:%s (level:%d) prepare checkpoint ready msg to upstream s-task:0x%" PRIx64 ":0x%x (vgId:%d) idx:%d",
+         pTask->id.idStr, pTask->info.taskLevel, req.streamId, req.upstreamTaskId, req.downstreamNodeId, index);
+
+  if (pTask->pReadyMsgList == NULL) {
+    pTask->pReadyMsgList = taosArrayInit(4, sizeof(SStreamChkptReadyInfo));
+  }
+
+  taosArrayPush(pTask->pReadyMsgList, &info);
+  return 0;
 }
 
 // todo record the idle time for dispatch data
@@ -848,7 +803,7 @@ int32_t streamProcessDispatchRsp(SStreamTask* pTask, SStreamDispatchRsp* pRsp, i
     // happened too fast. todo handle the shuffle dispatch failure
     qError("s-task:%s failed to dispatch msg to task:0x%x, code:%s, retry cnt:%d", pTask->id.idStr,
            pRsp->downstreamTaskId, tstrerror(code), ++pTask->msgInfo.retryCount);
-    int32_t ret = streamDispatchAllBlocks(pTask, pTask->msgInfo.pData);
+    int32_t ret = doDispatchAllBlocks(pTask, pTask->msgInfo.pData);
     if (ret != TSDB_CODE_SUCCESS) {
     }
 
diff --git a/source/libs/stream/src/streamExec.c b/source/libs/stream/src/streamExec.c
index 983edfb30d..08dc59dfd2 100644
--- a/source/libs/stream/src/streamExec.c
+++ b/source/libs/stream/src/streamExec.c
@@ -57,8 +57,7 @@ static int32_t doDumpResult(SStreamTask* pTask, SStreamQueueItem* pItem, SArray*
   return TSDB_CODE_SUCCESS;
 }
 
-static int32_t streamTaskExecImpl(SStreamTask* pTask, SStreamQueueItem* pItem, int64_t* totalSize,
-                                  int32_t* totalBlocks) {
+static int32_t streamTaskExecImpl(SStreamTask* pTask, SStreamQueueItem* pItem, int64_t* totalSize, int32_t* totalBlocks) {
   int32_t code = TSDB_CODE_SUCCESS;
   void*   pExecutor = pTask->exec.pExecutor;
 
@@ -413,9 +412,9 @@ static void doSetStreamInputBlock(SStreamTask* pTask, const void* pInput, int64_
     const SStreamRefDataBlock* pRefBlock = (const SStreamRefDataBlock*)pInput;
     qSetMultiStreamInput(pExecutor, pRefBlock->pBlock, 1, STREAM_INPUT__DATA_BLOCK);
 
-  } else if (pItem->type == STREAM_INPUT__CHECKPOINT) {
+  } else if (pItem->type == STREAM_INPUT__CHECKPOINT || pItem->type == STREAM_INPUT__CHECKPOINT_TRIGGER) {
     const SStreamCheckpoint* pCheckpoint = (const SStreamCheckpoint*)pInput;
-    qSetMultiStreamInput(pExecutor, pCheckpoint->pBlock, 1, STREAM_INPUT__CHECKPOINT);
+    qSetMultiStreamInput(pExecutor, pCheckpoint->pBlock, 1, pItem->type);
 
   } else {
     ASSERT(0);
@@ -434,9 +433,7 @@ int32_t streamExecForAll(SStreamTask* pTask) {
     SStreamQueueItem* pInput = NULL;
 
     // merge multiple input data if possible in the input queue.
-    qDebug("s-task:%s start to extract data block from inputQ", id);
-
-    /*int32_t code = */ extractBlocksFromInputQ(pTask, &pInput, &batchSize, id);
+    extractBlocksFromInputQ(pTask, &pInput, &batchSize);
     if (pInput == NULL) {
       ASSERT(batchSize == 0);
       if (pTask->info.fillHistory && pTask->status.transferState) {
@@ -451,8 +448,11 @@ int32_t streamExecForAll(SStreamTask* pTask) {
     }
 
     int32_t type = pInput->type;
-    if (type == STREAM_INPUT__CHECKPOINT || type == STREAM_INPUT__CHECKPOINT_TRIGGER) {
-      ASSERT(getNumOfItemsInputQ(pTask) == 1);
+
+    // dispatch checkpoint msg to all downstream tasks
+    if (type == STREAM_INPUT__CHECKPOINT_TRIGGER) {
+      streamProcessCheckpointBlock(pTask, (SStreamDataBlock*)pInput);
+      continue;
     }
 
     if (pTask->info.taskLevel == TASK_LEVEL__SINK) {
@@ -462,21 +462,9 @@ int32_t streamExecForAll(SStreamTask* pTask) {
         qDebug("s-task:%s sink task start to sink %d blocks", id, batchSize);
         streamTaskOutputResultBlock(pTask, (SStreamDataBlock*)pInput);
         continue;
-      } else {  // pInput->type == STREAM_INPUT__CHECKPOINT, for sink task, do nothing.
-        ASSERT(pTask->status.taskStatus == TASK_STATUS__CK);
-        pTask->status.taskStatus = TASK_STATUS__CK_READY;
-        return 0;
       }
     }
 
-    // dispatch checkpoint msg to all downstream tasks
-    if (type == STREAM_INPUT__CHECKPOINT_TRIGGER) {
-      qDebug("s-task:%s start to dispatch checkpoint msg to downstream", id);
-
-      streamTaskDispatchCheckpointMsg(pTask, pTask->checkpointingId);
-      return 0;
-    }
-
     int64_t st = taosGetTimestampMs();
 
     const SStreamQueueItem* pItem = pInput;
@@ -565,7 +553,7 @@ int32_t streamTryExec(SStreamTask* pTask) {
       if (pTask->info.taskLevel == TASK_LEVEL__SOURCE) {
         code = streamTaskSendCheckpointSourceRsp(pTask);
       } else {
-        code = streamTaskSendCheckpointRsp(pTask);
+        code = streamTaskSendCheckpointReadyMsg(pTask);
       }
 
       if (code != TSDB_CODE_SUCCESS) {
diff --git a/source/libs/stream/src/streamQueue.c b/source/libs/stream/src/streamQueue.c
index 49b7e81c25..74709b29e8 100644
--- a/source/libs/stream/src/streamQueue.c
+++ b/source/libs/stream/src/streamQueue.c
@@ -167,13 +167,14 @@ SStreamQueueItem* doReadMultiBlocksFromQueue(SQueueReader* pReader, const char*
 }
 #endif
 
-int32_t extractBlocksFromInputQ(SStreamTask* pTask, SStreamQueueItem** pInput, int32_t* numOfBlocks, const char* id) {
+int32_t extractBlocksFromInputQ(SStreamTask* pTask, SStreamQueueItem** pInput, int32_t* numOfBlocks) {
   int32_t retryTimes = 0;
   int32_t MAX_RETRY_TIMES = 5;
+  const char* id = pTask->id.idStr;
 
   while (1) {
     if (streamTaskShouldPause(&pTask->status)) {
-      qDebug("s-task:%s task should pause, input blocks:%d", pTask->id.idStr, *numOfBlocks);
+      qDebug("s-task:%s task should pause, extract input blocks:%d", pTask->id.idStr, *numOfBlocks);
       return TSDB_CODE_SUCCESS;
     }
 
@@ -181,17 +182,24 @@ int32_t extractBlocksFromInputQ(SStreamTask* pTask, SStreamQueueItem** pInput, i
     if (qItem == NULL) {
       if (pTask->info.taskLevel == TASK_LEVEL__SOURCE && (++retryTimes) < MAX_RETRY_TIMES) {
         taosMsleep(10);
-        qDebug("===stream===try again batchSize:%d, retry:%d", *numOfBlocks, retryTimes);
+        qDebug("===stream===try again batchSize:%d, retry:%d, %s", *numOfBlocks, retryTimes, id);
         continue;
       }
 
-      qDebug("===stream===break batchSize:%d", *numOfBlocks);
+      qDebug("===stream===break batchSize:%d, %s", *numOfBlocks, id);
       return TSDB_CODE_SUCCESS;
     }
 
     // do not merge blocks for sink node and check point data block
     if ((pTask->info.taskLevel == TASK_LEVEL__SINK) ||
         (qItem->type == STREAM_INPUT__CHECKPOINT || qItem->type == STREAM_INPUT__CHECKPOINT_TRIGGER)) {
+
+      if (qItem->type == STREAM_INPUT__CHECKPOINT || qItem->type == STREAM_INPUT__CHECKPOINT_TRIGGER) {
+        qDebug("s-task:%s checkpoint msg extracted, start to process immediately", id);
+      } else {
+        qDebug("s-task:%s sink task handle result block one-by-one", id);
+      }
+
       *numOfBlocks = 1;
       *pInput = qItem;
       return TSDB_CODE_SUCCESS;
diff --git a/source/libs/stream/src/streamRecover.c b/source/libs/stream/src/streamRecover.c
index b229078b44..1446198b16 100644
--- a/source/libs/stream/src/streamRecover.c
+++ b/source/libs/stream/src/streamRecover.c
@@ -132,7 +132,7 @@ int32_t streamTaskCheckDownstreamTasks(SStreamTask* pTask) {
     }
   } else {
     pTask->status.downstreamReady = 1;
-    qDebug("s-task:%s (vgId:%d) no downstream tasks, set downstream checked, try to launch scan-history-data, status:%s",
+    qDebug("s-task:%s (vgId:%d) set downstream checked since no downstream, try to launch scan-history-data, status:%s",
            pTask->id.idStr, pTask->info.nodeId, streamGetTaskStatusStr(pTask->status.taskStatus));
 
     streamTaskLaunchScanHistory(pTask);
diff --git a/source/libs/stream/src/streamTask.c b/source/libs/stream/src/streamTask.c
index fa99006210..e5135a43c7 100644
--- a/source/libs/stream/src/streamTask.c
+++ b/source/libs/stream/src/streamTask.c
@@ -242,7 +242,7 @@ void tFreeStreamTask(SStreamTask* pTask) {
     streamStateClose(pTask->pState, status == TASK_STATUS__DROPPING);
   }
 
-  pTask->pRpcMsgList = taosArrayDestroy(pTask->pRpcMsgList);
+  pTask->pReadyMsgList = taosArrayDestroy(pTask->pReadyMsgList);
 
   if (pTask->id.idStr != NULL) {
     taosMemoryFree((void*)pTask->id.idStr);