diff --git a/source/libs/stream/src/stream.c b/source/libs/stream/src/stream.c
index 8bca0e6ec2..72fd520498 100644
--- a/source/libs/stream/src/stream.c
+++ b/source/libs/stream/src/stream.c
@@ -237,7 +237,7 @@ int32_t streamProcessDispatchRsp(SStreamTask* pTask, SStreamDispatchRsp* pRsp, i
 
   if (pTask->outputType == TASK_OUTPUT__SHUFFLE_DISPATCH) {
     int32_t leftRsp = atomic_sub_fetch_32(&pTask->shuffleDispatcher.waitingRspCnt, 1);
-    qDebug("task %d is shuffle, left waiting rsp %d", pTask->id.taskId, leftRsp);
+    qDebug("s-task:%s is shuffle, left waiting rsp %d", pTask->id.idStr, leftRsp);
     if (leftRsp > 0) {
       return 0;
     }
@@ -246,6 +246,8 @@ int32_t streamProcessDispatchRsp(SStreamTask* pTask, SStreamDispatchRsp* pRsp, i
   int8_t old = atomic_exchange_8(&pTask->outputStatus, pRsp->inputStatus);
   ASSERT(old == TASK_OUTPUT_STATUS__WAIT);
 
+  qDebug("s-task:%s receive dispatch rsp, output status:%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) {
diff --git a/source/libs/stream/src/streamDispatch.c b/source/libs/stream/src/streamDispatch.c
index 401a8b9e74..1e939cb071 100644
--- a/source/libs/stream/src/streamDispatch.c
+++ b/source/libs/stream/src/streamDispatch.c
@@ -510,14 +510,17 @@ int32_t streamDispatchStreamBlock(SStreamTask* pTask) {
   int8_t old =
       atomic_val_compare_exchange_8(&pTask->outputStatus, TASK_OUTPUT_STATUS__NORMAL, TASK_OUTPUT_STATUS__WAIT);
   if (old != TASK_OUTPUT_STATUS__NORMAL) {
-    qDebug("s-task:%s task wait for dispatch rsp, not dispatch now", pTask->id.idStr);
+    qDebug("s-task:%s task wait for dispatch rsp, not dispatch now, output status:%d", pTask->id.idStr, old);
     return 0;
   }
 
+  qDebug("s-task:%s start to dispatch msg, output status:%d", pTask->id.idStr, pTask->outputStatus);
+
   SStreamDataBlock* pDispatchedBlock = streamQueueNextItem(pTask->outputQueue);
   if (pDispatchedBlock == NULL) {
-    qDebug("s-task:%s stop dispatching since no output in output queue", pTask->id.idStr);
     atomic_store_8(&pTask->outputStatus, TASK_OUTPUT_STATUS__NORMAL);
+    qDebug("s-task:%s stop dispatching since no output in output queue, output status:%d", pTask->id.idStr,
+           pTask->outputStatus);
     return 0;
   }
 
@@ -527,6 +530,7 @@ int32_t streamDispatchStreamBlock(SStreamTask* pTask) {
   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);
   }
 
   // this block can be freed only when it has been pushed to down stream.