diff --git a/source/dnode/vnode/src/tq/tq.c b/source/dnode/vnode/src/tq/tq.c
index 82e57daf56..c690610341 100644
--- a/source/dnode/vnode/src/tq/tq.c
+++ b/source/dnode/vnode/src/tq/tq.c
@@ -826,6 +826,9 @@ int32_t tqProcessTaskRecover1Req(STQ* pTq, SRpcMsg* pMsg) {
 
   streamSourceRecoverScanStep1(pTask);
   if (atomic_load_8(&pTask->status.taskStatus) == TASK_STATUS__DROPPING) {
+    double el = (taosGetTimestampMs() - st) / 1000.0;
+    tqDebug("s-task:%s is dropped, abort recover in step1", pTask->id.idStr);
+
     streamMetaReleaseTask(pTq->pStreamMeta, pTask);
     return 0;
   }
@@ -842,7 +845,6 @@ int32_t tqProcessTaskRecover1Req(STQ* pTq, SRpcMsg* pMsg) {
   }
 
   streamMetaReleaseTask(pTq->pStreamMeta, pTask);
-
   if (atomic_load_8(&pTask->status.taskStatus) == TASK_STATUS__DROPPING) {
     return 0;
   }
@@ -852,13 +854,14 @@ int32_t tqProcessTaskRecover1Req(STQ* pTq, SRpcMsg* pMsg) {
 
   void* serializedReq = rpcMallocCont(len);
   if (serializedReq == NULL) {
+    tqError("s-task:%s failed to prepare the step2 stage, out of memory", pTask->id.idStr);
     return -1;
   }
 
   memcpy(serializedReq, &req, len);
 
   // dispatch msg
-  tqDebug("s-task:%s start recover block stage", pTask->id.idStr);
+  tqDebug("s-task:%s start recover block stage(step 2)", pTask->id.idStr);
 
   SRpcMsg rpcMsg = {
       .code = 0, .contLen = len, .msgType = TDMT_VND_STREAM_RECOVER_BLOCKING_STAGE, .pCont = serializedReq};
@@ -870,7 +873,8 @@ int32_t tqProcessTaskRecover2Req(STQ* pTq, int64_t sversion, char* msg, int32_t
   int32_t code = 0;
 
   SStreamRecoverStep2Req* pReq = (SStreamRecoverStep2Req*)msg;
-  SStreamTask*            pTask = streamMetaAcquireTask(pTq->pStreamMeta, pReq->taskId);
+
+  SStreamTask* pTask = streamMetaAcquireTask(pTq->pStreamMeta, pReq->taskId);
   if (pTask == NULL) {
     return -1;
   }
@@ -912,7 +916,6 @@ int32_t tqProcessTaskRecover2Req(STQ* pTq, int64_t sversion, char* msg, int32_t
   streamMetaSaveTask(pTq->pStreamMeta, pTask);
 
   streamMetaReleaseTask(pTq->pStreamMeta, pTask);
-
   return 0;
 }
 
diff --git a/source/libs/stream/src/streamDispatch.c b/source/libs/stream/src/streamDispatch.c
index 549374ed94..95e864dc99 100644
--- a/source/libs/stream/src/streamDispatch.c
+++ b/source/libs/stream/src/streamDispatch.c
@@ -270,8 +270,12 @@ int32_t streamDispatchOneRecoverFinishReq(SStreamTask* pTask, const SStreamRecov
   SEncoder encoder;
   tEncoderInit(&encoder, abuf, tlen);
   if ((code = tEncodeSStreamRecoverFinishReq(&encoder, pReq)) < 0) {
-    goto FAIL;
+    if (buf) {
+      rpcFreeCont(buf);
+    }
+    return code;
   }
+
   tEncoderClear(&encoder);
 
   msg.contLen = tlen + sizeof(SMsgHead);
@@ -280,13 +284,10 @@ int32_t streamDispatchOneRecoverFinishReq(SStreamTask* pTask, const SStreamRecov
   msg.info.noResp = 1;
 
   tmsgSendReq(pEpSet, &msg);
-
-  qDebug("dispatch from task %d to task %d node %d: recover finish msg", pTask->id.taskId, pReq->taskId, vgId);
+  qDebug("s-task:%s dispatch recover finish msg to taskId:%d node %d: recover finish msg", pTask->id.idStr,
+         pReq->taskId, vgId);
 
   return 0;
-FAIL:
-  if (buf) rpcFreeCont(buf);
-  return code;
 }
 
 int32_t streamDispatchOneDataReq(SStreamTask* pTask, const SStreamDispatchReq* pReq, int32_t vgId, SEpSet* pEpSet) {
@@ -407,13 +408,15 @@ int32_t streamDispatchAllBlocks(SStreamTask* pTask, const SStreamDataBlock* pDat
 
     req.taskId = downstreamTaskId;
 
-    qDebug("s-task:%s (child taskId:%d) dispatch blocks:%d to down stream s-task:%d in vgId:%d", pTask->id.idStr,
+    qDebug("s-task:%s (child taskId:%d) fix-dispatch blocks:%d to down stream s-task:%d in vgId:%d", pTask->id.idStr,
            pTask->selfChildId, blockNum, downstreamTaskId, vgId);
 
     if (streamDispatchOneDataReq(pTask, &req, vgId, pEpSet) < 0) {
       goto FAIL_FIXED_DISPATCH;
     }
+
     code = 0;
+
   FAIL_FIXED_DISPATCH:
     taosArrayDestroyP(req.data, taosMemoryFree);
     taosArrayDestroy(req.dataLen);
@@ -427,6 +430,7 @@ int32_t streamDispatchAllBlocks(SStreamTask* pTask, const SStreamDataBlock* pDat
     int32_t             vgSz = taosArrayGetSize(vgInfo);
     SStreamDispatchReq* pReqs = taosMemoryCalloc(vgSz, sizeof(SStreamDispatchReq));
     if (pReqs == NULL) {
+      terrno = TSDB_CODE_OUT_OF_MEMORY;
       return -1;
     }
 
@@ -442,6 +446,7 @@ int32_t streamDispatchAllBlocks(SStreamTask* pTask, const SStreamDataBlock* pDat
       if (pReqs[i].data == NULL || pReqs[i].dataLen == NULL) {
         goto FAIL_SHUFFLE_DISPATCH;
       }
+
       SVgroupInfo* pVgInfo = taosArrayGet(vgInfo, i);
       pReqs[i].taskId = pVgInfo->taskId;
     }
@@ -468,33 +473,41 @@ int32_t streamDispatchAllBlocks(SStreamTask* pTask, const SStreamDataBlock* pDat
       }
     }
 
+    qDebug("s-task:%s (child taskId:%d) shuffle-dispatch blocks:%d to %d vgroups", pTask->id.idStr, pTask->selfChildId,
+           blockNum, vgSz);
+
     for (int32_t i = 0; i < vgSz; i++) {
       if (pReqs[i].blockNum > 0) {
-        // send
         SVgroupInfo* pVgInfo = taosArrayGet(vgInfo, i);
+        qDebug("s-task:%s (child taskId:%d) shuffle-dispatch blocks:%d to vgId:%d", pTask->id.idStr, pTask->selfChildId,
+               pReqs[i].blockNum, pVgInfo->vgId);
+
         if (streamDispatchOneDataReq(pTask, &pReqs[i], pVgInfo->vgId, &pVgInfo->epSet) < 0) {
           goto FAIL_SHUFFLE_DISPATCH;
         }
       }
     }
+
     code = 0;
+
   FAIL_SHUFFLE_DISPATCH:
-    if (pReqs) {
-      for (int32_t i = 0; i < vgSz; i++) {
-        taosArrayDestroyP(pReqs[i].data, taosMemoryFree);
-        taosArrayDestroy(pReqs[i].dataLen);
-      }
-      taosMemoryFree(pReqs);
+    for (int32_t i = 0; i < vgSz; i++) {
+      taosArrayDestroyP(pReqs[i].data, taosMemoryFree);
+      taosArrayDestroy(pReqs[i].dataLen);
     }
-    return code;
+    taosMemoryFree(pReqs);
   }
-  return 0;
+  return code;
 }
 
 int32_t streamDispatch(SStreamTask* pTask) {
   ASSERT(pTask->outputType == TASK_OUTPUT__FIXED_DISPATCH || pTask->outputType == TASK_OUTPUT__SHUFFLE_DISPATCH);
-  qDebug("s-task:%s try to dispatch intermediate result block to downstream, numofBlocks in outputQ:%d", pTask->id.idStr,
-         taosQueueItemSize(pTask->outputQueue->queue));
+
+  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,
+           numOfElems);
+  }
 
   int8_t old =
       atomic_val_compare_exchange_8(&pTask->outputStatus, TASK_OUTPUT_STATUS__NORMAL, TASK_OUTPUT_STATUS__WAIT);
@@ -504,7 +517,7 @@ int32_t streamDispatch(SStreamTask* pTask) {
 
   SStreamDataBlock* pBlock = streamQueueNextItem(pTask->outputQueue);
   if (pBlock == NULL) {
-    qDebug("s-task:%s stream stop dispatching since no output in output queue", pTask->id.idStr);
+    qDebug("s-task:%s stop dispatching since no output in output queue", pTask->id.idStr);
     atomic_store_8(&pTask->outputStatus, TASK_OUTPUT_STATUS__NORMAL);
     return 0;
   }
@@ -516,10 +529,8 @@ int32_t streamDispatch(SStreamTask* pTask) {
     code = -1;
     streamQueueProcessFail(pTask->outputQueue);
     atomic_store_8(&pTask->outputStatus, TASK_OUTPUT_STATUS__NORMAL);
-    goto FREE;
   }
 
-FREE:
   taosArrayDestroyEx(pBlock->blocks, (FDelete)blockDataFreeRes);
   taosFreeQitem(pBlock);
   return code;
diff --git a/source/libs/stream/src/streamRecover.c b/source/libs/stream/src/streamRecover.c
index 0d1440fbde..40c33577fb 100644
--- a/source/libs/stream/src/streamRecover.c
+++ b/source/libs/stream/src/streamRecover.c
@@ -212,7 +212,7 @@ int32_t streamBuildSourceRecover2Req(SStreamTask* pTask, SStreamRecoverStep2Req*
 int32_t streamSourceRecoverScanStep2(SStreamTask* pTask, int64_t ver) {
   void* exec = pTask->exec.pExecutor;
 
-  qDebug("s-task:%s recover step2(blocking stage) started", pTask->id.idStr);
+  qDebug("s-task:%s recover step2 (blocking stage) started", pTask->id.idStr);
   if (qStreamSourceRecoverStep2(exec, ver) < 0) {
   }
 
@@ -220,12 +220,13 @@ int32_t streamSourceRecoverScanStep2(SStreamTask* pTask, int64_t ver) {
 }
 
 int32_t streamDispatchRecoverFinishReq(SStreamTask* pTask) {
-  SStreamRecoverFinishReq req = {
-      .streamId = pTask->id.streamId,
-      .childId = pTask->selfChildId,
-  };
+  SStreamRecoverFinishReq req = { .streamId = pTask->id.streamId, .childId = pTask->selfChildId };
+
   // serialize
   if (pTask->outputType == TASK_OUTPUT__FIXED_DISPATCH) {
+    qDebug("s-task:%s send recover finish msg to downstream (fix-dispatch) to taskId:%d", pTask->id.idStr,
+           pTask->fixedEpDispatcher.taskId);
+
     req.taskId = pTask->fixedEpDispatcher.taskId;
     streamDispatchOneRecoverFinishReq(pTask, &req, pTask->fixedEpDispatcher.nodeId, &pTask->fixedEpDispatcher.epSet);
   } else if (pTask->outputType == TASK_OUTPUT__SHUFFLE_DISPATCH) {