diff --git a/include/libs/stream/tstream.h b/include/libs/stream/tstream.h
index e67423ca6e40c6f8eecbf6d0c67079b87a094851..1d80601178c509c376d71008d96d5f5e28a610a2 100644
--- a/include/libs/stream/tstream.h
+++ b/include/libs/stream/tstream.h
@@ -292,8 +292,16 @@ typedef struct SSTaskBasicInfo {
 typedef struct SDispatchMsgInfo {
   void*   pData;           // current dispatch data
   int16_t msgType;         // dispatch msg type
+  int32_t retryCount;      // retry send data count
+  int64_t blockingTs;      // output blocking timestamp
 } SDispatchMsgInfo;
 
+typedef struct {
+  int8_t        outputType;
+  int8_t        outputStatus;
+  SStreamQueue* outputQueue;
+} SSTaskOutputInfo;
+
 struct SStreamTask {
   SStreamId        id;
   SSTaskBasicInfo  info;
@@ -536,7 +544,9 @@ int32_t tDecodeStreamDispatchReq(SDecoder* pDecoder, SStreamDispatchReq* pReq);
 int32_t tDecodeStreamRetrieveReq(SDecoder* pDecoder, SStreamRetrieveReq* pReq);
 void    tDeleteStreamRetrieveReq(SStreamRetrieveReq* pReq);
 
-void tDeleteStreamDispatchReq(SStreamDispatchReq* pReq);
+int32_t tInitStreamDispatchReq(SStreamDispatchReq* pReq, const SStreamTask* pTask, int32_t vgId, int32_t numOfBlocks,
+                               int64_t dstTaskId);
+void    tDeleteStreamDispatchReq(SStreamDispatchReq* pReq);
 
 int32_t streamSetupTrigger(SStreamTask* pTask);
 
diff --git a/source/libs/stream/inc/streamInc.h b/source/libs/stream/inc/streamInc.h
index 3ed7bc8f7e3d9be0d4d753d632a995e3ec70aff7..e51a6184528d9edccf02d1890813deedcfb5701d 100644
--- a/source/libs/stream/inc/streamInc.h
+++ b/source/libs/stream/inc/streamInc.h
@@ -33,6 +33,7 @@ typedef struct {
 
 extern SStreamGlobalEnv streamEnv;
 
+void    streamRetryDispatchStreamBlock(SStreamTask* pTask, int64_t waitDuration);
 int32_t streamDispatchStreamBlock(SStreamTask* pTask);
 
 SStreamDataBlock* createStreamDataFromDispatchMsg(const SStreamDispatchReq* pReq, int32_t blockType, int32_t srcVg);
@@ -44,6 +45,7 @@ int32_t streamBroadcastToChildren(SStreamTask* pTask, const SSDataBlock* pBlock)
 
 int32_t tEncodeStreamRetrieveReq(SEncoder* pEncoder, const SStreamRetrieveReq* pReq);
 
+int32_t streamDispatchAllBlocks(SStreamTask* pTask, const SStreamDataBlock* pData);
 int32_t streamDispatchCheckMsg(SStreamTask* pTask, const SStreamTaskCheckReq* pReq, int32_t nodeId, SEpSet* pEpSet);
 
 int32_t streamDoDispatchRecoverFinishMsg(SStreamTask* pTask, const SStreamRecoverFinishReq* pReq, int32_t vgId,
diff --git a/source/libs/stream/src/stream.c b/source/libs/stream/src/stream.c
index bdf7358f9073e4a52ade1025e2b4810e0a834719..3befd5d55d097a5a7915ad3aa63676c8be6416a5 100644
--- a/source/libs/stream/src/stream.c
+++ b/source/libs/stream/src/stream.c
@@ -235,9 +235,26 @@ int32_t streamProcessDispatchMsg(SStreamTask* pTask, SStreamDispatchReq* pReq, S
   return 0;
 }
 
+// todo record the idle time for dispatch data
 int32_t streamProcessDispatchRsp(SStreamTask* pTask, SStreamDispatchRsp* pRsp, int32_t code) {
+  if (code != TSDB_CODE_SUCCESS) {
+    // dispatch message failed: network error, or node not available.
+    // in case of the input queue is full, the code will be TSDB_CODE_SUCCESS, the and pRsp>inputStatus will be set
+    // flag. here we need to retry dispatch this message to downstream task immediately. handle the case the failure
+    // 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);
+    if (ret != TSDB_CODE_SUCCESS) {
+
+    }
+
+    return TSDB_CODE_SUCCESS;
+  }
+
   qDebug("s-task:%s receive dispatch rsp, output status:%d code:%d", pTask->id.idStr, pRsp->inputStatus, code);
 
+  // there are other dispatch message not response yet
   if (pTask->outputType == TASK_OUTPUT__SHUFFLE_DISPATCH) {
     int32_t leftRsp = atomic_sub_fetch_32(&pTask->shuffleDispatcher.waitingRspCnt, 1);
     qDebug("s-task:%s is shuffle, left waiting rsp %d", pTask->id.idStr, leftRsp);
@@ -246,23 +263,31 @@ int32_t streamProcessDispatchRsp(SStreamTask* pTask, SStreamDispatchRsp* pRsp, i
     }
   }
 
+  pTask->msgInfo.retryCount = 0;
   int8_t old = atomic_exchange_8(&pTask->outputStatus, pRsp->inputStatus);
   ASSERT(old == TASK_OUTPUT_STATUS__WAIT);
 
+  qDebug("s-task:%s output status is set to:%d", pTask->id.idStr, pTask->outputStatus);
+
   // the input queue of the (down stream) task that receive the output data is full, so the TASK_INPUT_STATUS_BLOCKED is rsp
-  // todo we need to send EMPTY PACKAGE to detect if the input queue is available for output of upstream task, every 50 ms.
-  if (pRsp->inputStatus == TASK_INPUT_STATUS__BLOCKED) {
-    // TODO: init recover timer
-    qError("s-task:%s inputQ of downstream task:0x%x is full, need to block output", pTask->id.idStr, pRsp->downstreamTaskId);
+  if (pTask->outputStatus == TASK_INPUT_STATUS__BLOCKED) {
+    pTask->msgInfo.blockingTs = taosGetTimestampMs(); // record the blocking start time
+
+    int32_t waitDuration = 300; //  300 ms
+    qError("s-task:%s inputQ of downstream task:0x%x is full, time:%" PRId64 "wait for %dms and retry dispatch data",
+           pTask->id.idStr, pRsp->downstreamTaskId, pTask->msgInfo.blockingTs, waitDuration);
+    streamRetryDispatchStreamBlock(pTask, waitDuration);
+  } else { // pipeline send data in output queue
+    // this message has been sent successfully, let's try next one.
+    destroyStreamDataBlock(pTask->msgInfo.pData);
+    pTask->msgInfo.pData = NULL;
 
     atomic_store_8(&pTask->outputStatus, TASK_OUTPUT_STATUS__NORMAL);
-    qError("s-task:%s ignore error, and reset task output status:%d", pTask->id.idStr, pTask->outputStatus);
 
-    return 0;
+    // otherwise, continue dispatch the first block to down stream task in pipeline
+    streamDispatchStreamBlock(pTask);
   }
 
-  // otherwise, continue dispatch the first block to down stream task in pipeline
-  streamDispatchStreamBlock(pTask);
   return 0;
 }
 
@@ -271,7 +296,7 @@ int32_t streamProcessRunReq(SStreamTask* pTask) {
     return -1;
   }
 
-  /*if (pTask->outputType == TASK_OUTPUT__FIXED_DISPATCH || pTask->outputType == TASK_OUTPUT__SHUFFLE_DISPATCH) {*/
+  /*if (pTask->dispatchType == TASK_OUTPUT__FIXED_DISPATCH || pTask->dispatchType == TASK_OUTPUT__SHUFFLE_DISPATCH) {*/
   /*streamDispatchStreamBlock(pTask);*/
   /*}*/
   return 0;
diff --git a/source/libs/stream/src/streamDispatch.c b/source/libs/stream/src/streamDispatch.c
index 25ce470b3390b74af77c2edc04eddb4da25c5543..3d01d4411df793da35407a87d8163c6477c64cf0 100644
--- a/source/libs/stream/src/streamDispatch.c
+++ b/source/libs/stream/src/streamDispatch.c
@@ -13,10 +13,9 @@
  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  */
 
+#include <util/ttimer.h>
 #include "streamInc.h"
 
-static int32_t streamDispatchAllBlocks(SStreamTask* pTask, const SStreamDataBlock* pData);
-
 static int32_t tEncodeStreamDispatchReq(SEncoder* pEncoder, const SStreamDispatchReq* pReq) {
   if (tStartEncode(pEncoder) < 0) return -1;
   if (tEncodeI64(pEncoder, pReq->streamId) < 0) return -1;
@@ -98,6 +97,27 @@ 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) {
+  pReq->streamId = pTask->id.streamId;
+  pReq->dataSrcVgId = vgId;
+  pReq->upstreamTaskId = pTask->id.taskId;
+  pReq->upstreamChildId = pTask->info.selfChildId;
+  pReq->upstreamNodeId = pTask->info.nodeId;
+  pReq->blockNum = numOfBlocks;
+  pReq->taskId = dstTaskId;
+
+  pReq->data = taosArrayInit(numOfBlocks, POINTER_BYTES);
+  pReq->dataLen = taosArrayInit(numOfBlocks, sizeof(int32_t));
+  if (pReq->data == NULL || pReq->dataLen == NULL) {
+    taosArrayDestroyP(pReq->data, taosMemoryFree);
+    taosArrayDestroy(pReq->dataLen);
+    return TSDB_CODE_OUT_OF_MEMORY;
+  }
+
+  return TSDB_CODE_SUCCESS;
+}
+
 void tDeleteStreamDispatchReq(SStreamDispatchReq* pReq) {
   taosArrayDestroyP(pReq->data, taosMemoryFree);
   taosArrayDestroy(pReq->dataLen);
@@ -248,7 +268,7 @@ int32_t streamDispatchCheckMsg(SStreamTask* pTask, const SStreamTaskCheckReq* pR
 }
 
 int32_t streamDoDispatchRecoverFinishMsg(SStreamTask* pTask, const SStreamRecoverFinishReq* pReq, int32_t vgId,
-                                          SEpSet* pEpSet) {
+                                         SEpSet* pEpSet) {
   void*   buf = NULL;
   int32_t code = -1;
   SRpcMsg msg = {0};
@@ -377,25 +397,17 @@ int32_t streamSearchAndAddBlock(SStreamTask* pTask, SStreamDispatchReq* pReqs, S
 
 int32_t streamDispatchAllBlocks(SStreamTask* pTask, const SStreamDataBlock* pData) {
   int32_t code = 0;
+
   int32_t numOfBlocks = taosArrayGetSize(pData->blocks);
   ASSERT(numOfBlocks != 0);
 
   if (pTask->outputType == TASK_OUTPUT__FIXED_DISPATCH) {
-    SStreamDispatchReq req = {
-        .streamId = pTask->id.streamId,
-        .dataSrcVgId = pData->srcVgId,
-        .upstreamTaskId = pTask->id.taskId,
-        .upstreamChildId = pTask->info.selfChildId,
-        .upstreamNodeId = pTask->info.nodeId,
-        .blockNum = numOfBlocks,
-    };
-
-    req.data = taosArrayInit(numOfBlocks, POINTER_BYTES);
-    req.dataLen = taosArrayInit(numOfBlocks, sizeof(int32_t));
-    if (req.data == NULL || req.dataLen == NULL) {
-      taosArrayDestroyP(req.data, taosMemoryFree);
-      taosArrayDestroy(req.dataLen);
-      return TSDB_CODE_OUT_OF_MEMORY;
+    SStreamDispatchReq req = {0};
+
+    int32_t downstreamTaskId = pTask->fixedEpDispatcher.taskId;
+    code = tInitStreamDispatchReq(&req, pTask, pData->srcVgId, numOfBlocks, downstreamTaskId);
+    if (code != TSDB_CODE_SUCCESS) {
+      return code;
     }
 
     for (int32_t i = 0; i < numOfBlocks; i++) {
@@ -411,9 +423,6 @@ int32_t streamDispatchAllBlocks(SStreamTask* pTask, const SStreamDataBlock* pDat
 
     int32_t vgId = pTask->fixedEpDispatcher.nodeId;
     SEpSet* pEpSet = &pTask->fixedEpDispatcher.epSet;
-    int32_t downstreamTaskId = pTask->fixedEpDispatcher.taskId;
-
-    req.taskId = downstreamTaskId;
 
     qDebug("s-task:%s (child taskId:%d) fix-dispatch %d block(s) to s-task:0x%x (vgId:%d)", pTask->id.idStr,
            pTask->info.selfChildId, numOfBlocks, downstreamTaskId, vgId);
@@ -426,8 +435,9 @@ int32_t streamDispatchAllBlocks(SStreamTask* pTask, const SStreamDataBlock* pDat
     int32_t rspCnt = atomic_load_32(&pTask->shuffleDispatcher.waitingRspCnt);
     ASSERT(rspCnt == 0);
 
-    SArray*             vgInfo = pTask->shuffleDispatcher.dbInfo.pVgroupInfos;
-    int32_t             vgSz = taosArrayGetSize(vgInfo);
+    SArray* vgInfo = pTask->shuffleDispatcher.dbInfo.pVgroupInfos;
+    int32_t vgSz = taosArrayGetSize(vgInfo);
+
     SStreamDispatchReq* pReqs = taosMemoryCalloc(vgSz, sizeof(SStreamDispatchReq));
     if (pReqs == NULL) {
       terrno = TSDB_CODE_OUT_OF_MEMORY;
@@ -435,20 +445,11 @@ int32_t streamDispatchAllBlocks(SStreamTask* pTask, const SStreamDataBlock* pDat
     }
 
     for (int32_t i = 0; i < vgSz; i++) {
-      pReqs[i].streamId = pTask->id.streamId;
-      pReqs[i].dataSrcVgId = pData->srcVgId;
-      pReqs[i].upstreamTaskId = pTask->id.taskId;
-      pReqs[i].upstreamChildId = pTask->info.selfChildId;
-      pReqs[i].upstreamNodeId = pTask->info.nodeId;
-      pReqs[i].blockNum = 0;
-      pReqs[i].data = taosArrayInit(0, sizeof(void*));
-      pReqs[i].dataLen = taosArrayInit(0, sizeof(int32_t));
-      if (pReqs[i].data == NULL || pReqs[i].dataLen == NULL) {
+      SVgroupInfo* pVgInfo = taosArrayGet(vgInfo, i);
+      code = tInitStreamDispatchReq(&pReqs[i], pTask, pData->srcVgId, 0, pVgInfo->taskId);
+      if (code != TSDB_CODE_SUCCESS) {
         goto FAIL_SHUFFLE_DISPATCH;
       }
-
-      SVgroupInfo* pVgInfo = taosArrayGet(vgInfo, i);
-      pReqs[i].taskId = pVgInfo->taskId;
     }
 
     for (int32_t i = 0; i < numOfBlocks; i++) {
@@ -456,15 +457,18 @@ int32_t streamDispatchAllBlocks(SStreamTask* pTask, const SStreamDataBlock* pDat
 
       // TODO: do not use broadcast
       if (pDataBlock->info.type == STREAM_DELETE_RESULT) {
+
         for (int32_t j = 0; j < vgSz; j++) {
           if (streamAddBlockIntoDispatchMsg(pDataBlock, &pReqs[j]) < 0) {
             goto FAIL_SHUFFLE_DISPATCH;
           }
+
           if (pReqs[j].blockNum == 0) {
             atomic_add_fetch_32(&pTask->shuffleDispatcher.waitingRspCnt, 1);
           }
           pReqs[j].blockNum++;
         }
+
         continue;
       }
 
@@ -495,13 +499,31 @@ int32_t streamDispatchAllBlocks(SStreamTask* pTask, const SStreamDataBlock* pDat
       taosArrayDestroyP(pReqs[i].data, taosMemoryFree);
       taosArrayDestroy(pReqs[i].dataLen);
     }
+
     taosMemoryFree(pReqs);
   }
+
   return code;
 }
 
+static void doRetryDispatchData(void* param, void* tmrId) {
+  SStreamTask* pTask = param;
+  ASSERT(pTask->outputStatus == TASK_OUTPUT_STATUS__WAIT);
+
+  int32_t code = streamDispatchAllBlocks(pTask, pTask->msgInfo.pData);
+  if (code != TSDB_CODE_SUCCESS) {
+    streamRetryDispatchStreamBlock(pTask, 300);
+  }
+}
+
+void streamRetryDispatchStreamBlock(SStreamTask* pTask, int64_t waitDuration) {
+  qError("s-task:%s dispatch data in %"PRId64"ms", pTask->id.idStr, waitDuration);
+  taosTmrReset(doRetryDispatchData, waitDuration, pTask, streamEnv.timer, &pTask->timer);
+}
+
 int32_t streamDispatchStreamBlock(SStreamTask* pTask) {
-  ASSERT(pTask->outputType == TASK_OUTPUT__FIXED_DISPATCH || pTask->outputType == TASK_OUTPUT__SHUFFLE_DISPATCH);
+  ASSERT((pTask->outputType == TASK_OUTPUT__FIXED_DISPATCH || pTask->outputType == TASK_OUTPUT__SHUFFLE_DISPATCH));
+
   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,
@@ -516,6 +538,7 @@ int32_t streamDispatchStreamBlock(SStreamTask* pTask) {
     return 0;
   }
 
+  ASSERT(pTask->msgInfo.pData == NULL);
   qDebug("s-task:%s start to dispatch msg, set output status:%d", pTask->id.idStr, pTask->outputStatus);
 
   SStreamDataBlock* pBlock = streamQueueNextItem(pTask->outputQueue);
@@ -525,16 +548,28 @@ int32_t streamDispatchStreamBlock(SStreamTask* pTask) {
     return 0;
   }
 
+  pTask->msgInfo.pData = pBlock;
   ASSERT(pBlock->type == STREAM_INPUT__DATA_BLOCK);
 
-  int32_t code = streamDispatchAllBlocks(pTask, pBlock);
-  if (code != TSDB_CODE_SUCCESS) {
-    streamQueueProcessFail(pTask->outputQueue);
-    atomic_store_8(&pTask->outputStatus, TASK_OUTPUT_STATUS__NORMAL);
-    qDebug("s-task:%s failed to dispatch msg to downstream, output status:%d", pTask->id.idStr, pTask->outputStatus);
+  int32_t retryCount = 0;
+
+  while (1) {
+    int32_t code = streamDispatchAllBlocks(pTask, pBlock);
+    if (code == TSDB_CODE_SUCCESS) {
+      break;
+    }
+
+    qDebug("s-task:%s failed to dispatch msg to downstream, code:%s, output status:%d, retry cnt:%d", pTask->id.idStr,
+           tstrerror(code), pTask->outputStatus, retryCount);
+
+    if (++retryCount > 5) { // add to timer to retry
+      qDebug("s-task:%s failed to dispatch msg to downstream for %d times, code:%s, retry in %dms", pTask->id.idStr,
+             retryCount, tstrerror(code), 300);
+      streamRetryDispatchStreamBlock(pTask, 300);
+      break;
+    }
   }
 
-  // this block can be freed only when it has been pushed to down stream.
-  destroyStreamDataBlock(pBlock);
-  return code;
+  // this block can not be deleted until it has been sent to downstream task successfully.
+  return TSDB_CODE_SUCCESS;
 }
diff --git a/source/libs/stream/src/streamExec.c b/source/libs/stream/src/streamExec.c
index 096ec25af315292708a9f8985da7d9dd90594ff5..a1e72015ffb99951b23ffecafadb8ff7ae1a7ff7 100644
--- a/source/libs/stream/src/streamExec.c
+++ b/source/libs/stream/src/streamExec.c
@@ -237,11 +237,6 @@ int32_t streamScanExec(SStreamTask* pTask, int32_t batchSz) {
       taosFreeQitem(qRes);
       return code;
     }
-//
-//    if (pTask->outputType == TASK_OUTPUT__FIXED_DISPATCH || pTask->outputType == TASK_OUTPUT__SHUFFLE_DISPATCH) {
-//      qDebug("s-task:%s scan exec dispatch blocks:%d", pTask->id.idStr, batchCnt);
-//      streamDispatchStreamBlock(pTask);
-//    }
 
     if (finished) {
       break;
@@ -334,7 +329,8 @@ int32_t streamExecForAll(SStreamTask* pTask) {
     qDebug("s-task:%s start to extract data block from inputQ", id);
 
     while (1) {
-      if (streamTaskShouldPause(&pTask->status)) {
+      // downstream task's input queue is blocked, stop immediately
+      if (streamTaskShouldPause(&pTask->status) || (pTask->outputStatus == TASK_INPUT_STATUS__BLOCKED)) {
         if (batchSize > 1) {
           break;
         } else {
@@ -399,18 +395,6 @@ int32_t streamExecForAll(SStreamTask* pTask) {
       continue;
     }
 
-    // wait for the task to be ready to go
-    while (pTask->info.taskLevel == TASK_LEVEL__SOURCE) {
-      int8_t status = atomic_load_8(&pTask->status.taskStatus);
-      if (status != TASK_STATUS__NORMAL && status != TASK_STATUS__PAUSE) {
-        qError("stream task wait for the end of fill history, s-task:%s, status:%d", id,
-               atomic_load_8(&pTask->status.taskStatus));
-        taosMsleep(100);
-      } else {
-        break;
-      }
-    }
-
     int64_t st = taosGetTimestampMs();
     qDebug("s-task:%s start to process batch of blocks, num:%d", id, batchSize);