diff --git a/source/dnode/vnode/src/tq/tq.c b/source/dnode/vnode/src/tq/tq.c
index dcfc578ac7..8cc791d1a6 100644
--- a/source/dnode/vnode/src/tq/tq.c
+++ b/source/dnode/vnode/src/tq/tq.c
@@ -1272,13 +1272,15 @@ int32_t tqProcessTaskDispatchRsp(STQ* pTq, SRpcMsg* pMsg) {
   SStreamDispatchRsp* pRsp = POINTER_SHIFT(pMsg->pCont, sizeof(SMsgHead));
   int32_t             taskId = ntohl(pRsp->upstreamTaskId);
   SStreamTask*        pTask = streamMetaAcquireTask(pTq->pStreamMeta, taskId);
-  tqDebug("recv dispatch rsp, code:%x", pMsg->code);
+
+  int32_t vgId = pTq->pStreamMeta->vgId;
   if (pTask) {
     streamProcessDispatchRsp(pTask, pRsp, pMsg->code);
     streamMetaReleaseTask(pTq->pStreamMeta, pTask);
     return 0;
   } else {
-    return -1;
+    tqDebug("vgId:%d failed to handle the dispatch rsp, since find task:0x%x failed", vgId, taskId);
+    return TSDB_CODE_INVALID_MSG;
   }
 }
 
diff --git a/source/dnode/vnode/src/tq/tqSink.c b/source/dnode/vnode/src/tq/tqSink.c
index 0bd7d9a57b..6e02d5e21b 100644
--- a/source/dnode/vnode/src/tq/tqSink.c
+++ b/source/dnode/vnode/src/tq/tqSink.c
@@ -137,7 +137,7 @@ void tqSinkToTablePipeline(SStreamTask* pTask, void* vnode, int64_t ver, void* d
 
   int32_t blockSz = taosArrayGetSize(pBlocks);
 
-  tqDebug("vgId:%d, s-task:%s write results blocks:%d into table", TD_VID(pVnode), pTask->id.idStr, blockSz);
+  tqDebug("vgId:%d, s-task:%s write results %d blocks into table", TD_VID(pVnode), pTask->id.idStr, blockSz);
 
   void*   pBuf = NULL;
   SArray* tagArray = NULL;
@@ -482,17 +482,15 @@ void tqSinkToTablePipeline(SStreamTask* pTask, void* vnode, int64_t ver, void* d
       tEncoderClear(&encoder);
       tDestroySubmitReq(&submitReq, TSDB_MSG_FLG_ENCODE);
 
-      SRpcMsg msg = {
-          .msgType = TDMT_VND_SUBMIT,
-          .pCont = pBuf,
-          .contLen = len,
-      };
-
+      SRpcMsg msg = { .msgType = TDMT_VND_SUBMIT, .pCont = pBuf, .contLen = len };
       if (tmsgPutToQueue(&pVnode->msgCb, WRITE_QUEUE, &msg) != 0) {
         tqDebug("failed to put into write-queue since %s", terrstr());
       }
     }
   }
+
+  tqDebug("vgId:%d, s-task:%s write results completed", TD_VID(pVnode), pTask->id.idStr);
+
 _end:
   taosArrayDestroy(tagArray);
   taosArrayDestroy(pVals);
diff --git a/source/dnode/vnode/src/tsdb/tsdbRead.c b/source/dnode/vnode/src/tsdb/tsdbRead.c
index 362934ec84..7af0936bb5 100644
--- a/source/dnode/vnode/src/tsdb/tsdbRead.c
+++ b/source/dnode/vnode/src/tsdb/tsdbRead.c
@@ -1121,6 +1121,27 @@ static int32_t getEndPosInDataBlock(STsdbReader* pReader, SBlockData* pBlockData
     endPos = doBinarySearchKey(pBlockData->aTSKEY, pBlock->nRow, pos, key, pReader->order);
   }
 
+  if ((pReader->verRange.maxVer >= pBlock->minVer && pReader->verRange.maxVer < pBlock->maxVer)||
+      (pReader->verRange.minVer <= pBlock->maxVer && pReader->verRange.minVer > pBlock->minVer)) {
+    int32_t i = endPos;
+
+    if (asc) {
+      for(; i >= 0; --i) {
+        if (pBlockData->aVersion[i] <= pReader->verRange.maxVer) {
+          break;
+        }
+      }
+    } else {
+      for(; i < pBlock->nRow; ++i) {
+        if (pBlockData->aVersion[i] >= pReader->verRange.minVer) {
+          break;
+        }
+      }
+    }
+
+    endPos = i;
+  }
+
   return endPos;
 }
 
@@ -1260,10 +1281,11 @@ static int32_t copyBlockDataToSDataBlock(STsdbReader* pReader) {
     return 0;
   }
 
+  // row index of dump info remain the initial position, let's find the appropriate start position.
   if ((pDumpInfo->rowIndex == 0 && asc) || (pDumpInfo->rowIndex == pBlock->nRow - 1 && (!asc))) {
-    if (asc && pReader->window.skey <= pBlock->minKey.ts) {
+    if (asc && pReader->window.skey <= pBlock->minKey.ts && pReader->verRange.minVer <= pBlock->minVer) {
       // pDumpInfo->rowIndex = 0;
-    } else if (!asc && pReader->window.ekey >= pBlock->maxKey.ts) {
+    } else if (!asc && pReader->window.ekey >= pBlock->maxKey.ts && pReader->verRange.maxVer >= pBlock->maxVer) {
       // pDumpInfo->rowIndex = pBlock->nRow - 1;
     } else {  // find the appropriate the start position in current block, and set it to be the current rowIndex
       int32_t pos = asc ? pBlock->nRow - 1 : 0;
@@ -1279,6 +1301,29 @@ static int32_t copyBlockDataToSDataBlock(STsdbReader* pReader) {
             pBlock->maxVer, pReader->idStr);
         return TSDB_CODE_INVALID_PARA;
       }
+
+      ASSERT(pReader->verRange.minVer <= pBlock->maxVer && pReader->verRange.maxVer >= pBlock->minVer);
+
+      // find the appropriate start position that satisfies the version requirement.
+      if ((pReader->verRange.maxVer >= pBlock->minVer && pReader->verRange.maxVer < pBlock->maxVer)||
+          (pReader->verRange.minVer <= pBlock->maxVer && pReader->verRange.minVer > pBlock->minVer)) {
+        int32_t i = pDumpInfo->rowIndex;
+        if (asc) {
+          for(; i < pBlock->nRow; ++i) {
+            if (pBlockData->aVersion[i] >= pReader->verRange.minVer) {
+              break;
+            }
+          }
+        } else {
+          for(; i >= 0; --i) {
+            if (pBlockData->aVersion[i] <= pReader->verRange.maxVer) {
+              break;
+            }
+          }
+        }
+
+        pDumpInfo->rowIndex = i;
+      }
     }
   }
 
@@ -1293,6 +1338,9 @@ static int32_t copyBlockDataToSDataBlock(STsdbReader* pReader) {
   int32_t dumpedRows = asc ? (endIndex - pDumpInfo->rowIndex) : (pDumpInfo->rowIndex - endIndex);
   if (dumpedRows > pReader->resBlockInfo.capacity) {  // output buffer check
     dumpedRows = pReader->resBlockInfo.capacity;
+  } else if (dumpedRows <= 0) {  // no qualified rows in current data block, abort directly.
+    setBlockAllDumped(pDumpInfo, pReader->window.ekey, pReader->order);
+    return TSDB_CODE_SUCCESS;
   }
 
   int32_t i = 0;
@@ -1848,7 +1896,7 @@ static bool isCleanFileDataBlock(STsdbReader* pReader, SFileDataBlockInfo* pBloc
   SDataBlockToLoadInfo info = {0};
   getBlockToLoadInfo(&info, pBlockInfo, pBlock, pScanInfo, keyInBuf, pLastBlockReader, pReader);
   bool isCleanFileBlock = !(info.overlapWithNeighborBlock || info.hasDupTs || info.overlapWithKeyInBuf ||
-                            info.overlapWithDelInfo || info.overlapWithLastBlock || info.partiallyRequired);
+                            info.overlapWithDelInfo || info.overlapWithLastBlock);
   return isCleanFileBlock;
 }
 
@@ -2809,7 +2857,7 @@ static int32_t buildComposedDataBlock(STsdbReader* pReader) {
     // it is a clean block, load it directly
     if (isCleanFileDataBlock(pReader, pBlockInfo, pBlock, pBlockScanInfo, keyInBuf, pLastBlockReader) &&
         pBlock->nRow <= pReader->resBlockInfo.capacity) {
-      if (asc || ((!asc) && (!hasDataInLastBlock(pLastBlockReader)))) {
+      if (asc || (!hasDataInLastBlock(pLastBlockReader))) {
         code = copyBlockDataToSDataBlock(pReader);
         if (code) {
           goto _end;
@@ -2828,7 +2876,7 @@ static int32_t buildComposedDataBlock(STsdbReader* pReader) {
     }
   }
 
-  SBlockData*         pBlockData = &pReader->status.fileBlockData;
+  SBlockData* pBlockData = &pReader->status.fileBlockData;
 
   while (1) {
     bool hasBlockData = false;
@@ -2842,7 +2890,7 @@ static int32_t buildComposedDataBlock(STsdbReader* pReader) {
 
         pDumpInfo->rowIndex += step;
 
-        SDataBlk* pBlock = getCurrentBlock(&pReader->status.blockIter);
+        pBlock = getCurrentBlock(&pReader->status.blockIter);
         if (pDumpInfo->rowIndex >= pBlock->nRow || pDumpInfo->rowIndex < 0) {
           pBlockInfo = getCurrentBlockInfo(&pReader->status.blockIter);  // NOTE: get the new block info
 
@@ -2870,7 +2918,7 @@ static int32_t buildComposedDataBlock(STsdbReader* pReader) {
 
     // currently loaded file data block is consumed
     if ((pBlockData->nRow > 0) && (pDumpInfo->rowIndex >= pBlockData->nRow || pDumpInfo->rowIndex < 0)) {
-      SDataBlk* pBlock = getCurrentBlock(&pReader->status.blockIter);
+      pBlock = getCurrentBlock(&pReader->status.blockIter);
       setBlockAllDumped(pDumpInfo, pBlock->maxKey.ts, pReader->order);
       break;
     }
diff --git a/source/libs/executor/src/executor.c b/source/libs/executor/src/executor.c
index fb35b211c9..ed8a4f3a3b 100644
--- a/source/libs/executor/src/executor.c
+++ b/source/libs/executor/src/executor.c
@@ -132,7 +132,8 @@ static int32_t doSetStreamBlock(SOperatorInfo* pOperator, void* input, size_t nu
     pOperator->status = OP_NOT_OPENED;
 
     SStreamScanInfo* pInfo = pOperator->info;
-    qDebug("s-task:%s set source blocks:%d", id, (int32_t)numOfBlocks);
+
+    qDebug("s-task:%s in this batch, all %d blocks need to be processed and dump results", id, (int32_t)numOfBlocks);
     ASSERT(pInfo->validBlockIndex == 0 && taosArrayGetSize(pInfo->pBlockLists) == 0);
 
     if (type == STREAM_INPUT__MERGED_SUBMIT) {
@@ -140,6 +141,7 @@ static int32_t doSetStreamBlock(SOperatorInfo* pOperator, void* input, size_t nu
         SPackedData* pReq = POINTER_SHIFT(input, i * sizeof(SPackedData));
         taosArrayPush(pInfo->pBlockLists, pReq);
       }
+
       pInfo->blockType = STREAM_INPUT__DATA_SUBMIT;
     } else if (type == STREAM_INPUT__DATA_SUBMIT) {
       taosArrayPush(pInfo->pBlockLists, input);
@@ -150,6 +152,7 @@ static int32_t doSetStreamBlock(SOperatorInfo* pOperator, void* input, size_t nu
         SPackedData  tmp = { .pDataBlock = pDataBlock };
         taosArrayPush(pInfo->pBlockLists, &tmp);
       }
+
       pInfo->blockType = STREAM_INPUT__DATA_BLOCK;
     } else {
       ASSERT(0);
diff --git a/source/libs/executor/src/scanoperator.c b/source/libs/executor/src/scanoperator.c
index f11b083ad6..28abee4342 100644
--- a/source/libs/executor/src/scanoperator.c
+++ b/source/libs/executor/src/scanoperator.c
@@ -1797,9 +1797,10 @@ void streamScanOperatorDecode(void* pBuff, int32_t len, SStreamScanInfo* pInfo)
 
 static SSDataBlock* doStreamScan(SOperatorInfo* pOperator) {
   // NOTE: this operator does never check if current status is done or not
-  SExecTaskInfo*   pTaskInfo = pOperator->pTaskInfo;
-  SStorageAPI* pAPI = &pTaskInfo->storageAPI;
+  SExecTaskInfo* pTaskInfo = pOperator->pTaskInfo;
+  const char*    id = GET_TASKID(pTaskInfo);
 
+  SStorageAPI*     pAPI = &pTaskInfo->storageAPI;
   SStreamScanInfo* pInfo = pOperator->info;
 
   qDebug("stream scan started, %s", GET_TASKID(pTaskInfo));
@@ -1922,7 +1923,9 @@ FETCH_NEXT_BLOCK:
       return NULL;
     }
 
-    int32_t      current = pInfo->validBlockIndex++;
+    int32_t  current = pInfo->validBlockIndex++;
+    qDebug("process %d/%d input data blocks, %s", current, (int32_t) total, id);
+
     SPackedData* pPacked = taosArrayGet(pInfo->pBlockLists, current);
     SSDataBlock* pBlock = pPacked->pDataBlock;
     if (pBlock->info.parTbName[0]) {
@@ -2057,7 +2060,6 @@ FETCH_NEXT_BLOCK:
       return pInfo->pUpdateRes;
     }
 
-    const char*     id = GET_TASKID(pTaskInfo);
     SSDataBlock*    pBlock = pInfo->pRes;
     SDataBlockInfo* pBlockInfo = &pBlock->info;
     int32_t         totalBlocks = taosArrayGetSize(pInfo->pBlockLists);
diff --git a/source/libs/stream/src/stream.c b/source/libs/stream/src/stream.c
index 8bca0e6ec2..acc69c5a2b 100644
--- a/source/libs/stream/src/stream.c
+++ b/source/libs/stream/src/stream.c
@@ -126,7 +126,7 @@ int32_t streamTaskEnqueueBlocks(SStreamTask* pTask, const SStreamDispatchReq* pR
   if (pBlock == NULL) {
     streamTaskInputFail(pTask);
     status = TASK_INPUT_STATUS__FAILED;
-    qDebug("vgId:%d, s-task:%s failed to receive dispatch msg, reason: out of memory", pTask->pMeta->vgId,
+    qError("vgId:%d, s-task:%s failed to receive dispatch msg, reason: out of memory", pTask->pMeta->vgId,
            pTask->id.idStr);
   } else {
     int32_t code = tAppendDataToInputQueue(pTask, (SStreamQueueItem*)pBlock);
@@ -233,11 +233,11 @@ int32_t streamProcessDispatchMsg(SStreamTask* pTask, SStreamDispatchReq* pReq, S
 }
 
 int32_t streamProcessDispatchRsp(SStreamTask* pTask, SStreamDispatchRsp* pRsp, int32_t code) {
-  qDebug("s-task:%s receive dispatch rsp, status:%d code:%d", pTask->id.idStr, pRsp->inputStatus, code);
+  qDebug("s-task:%s receive dispatch rsp, output status:%d code:%d", pTask->id.idStr, pRsp->inputStatus, code);
 
   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;
     }
@@ -251,6 +251,10 @@ int32_t streamProcessDispatchRsp(SStreamTask* pTask, SStreamDispatchRsp* pRsp, i
   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);
+
+    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;
   }
 
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.
diff --git a/source/libs/stream/src/streamExec.c b/source/libs/stream/src/streamExec.c
index 95b97e080a..716b939e5f 100644
--- a/source/libs/stream/src/streamExec.c
+++ b/source/libs/stream/src/streamExec.c
@@ -16,9 +16,9 @@
 #include "streamInc.h"
 
 // maximum allowed processed block batches. One block may include several submit blocks
-#define MAX_STREAM_EXEC_BATCH_NUM 128
-#define MIN_STREAM_EXEC_BATCH_NUM 16
-#define MAX_STREAM_RESULT_DUMP_THRESHOLD  1000
+#define MAX_STREAM_EXEC_BATCH_NUM 32
+#define MIN_STREAM_EXEC_BATCH_NUM 8
+#define MAX_STREAM_RESULT_DUMP_THRESHOLD  100
 
 static int32_t updateCheckPointInfo (SStreamTask* pTask);
 
@@ -385,7 +385,7 @@ int32_t streamExecForAll(SStreamTask* pTask) {
 
     if (pTask->taskLevel == TASK_LEVEL__SINK) {
       ASSERT(pInput->type == STREAM_INPUT__DATA_BLOCK);
-      qDebug("s-task:%s sink node start to sink result. numOfBlocks:%d", pTask->id.idStr, batchSize);
+      qDebug("s-task:%s sink task start to sink %d blocks", pTask->id.idStr, batchSize);
       streamTaskOutputResultBlock(pTask, (SStreamDataBlock*)pInput);
       continue;
     }