diff --git a/include/common/tcommon.h b/include/common/tcommon.h
index 4b17ff48abea1d254c739eb4234ed6b024dc53a6..520a8e9c2c03a6e455e1cc29846d42c6ba3e4561 100644
--- a/include/common/tcommon.h
+++ b/include/common/tcommon.h
@@ -208,11 +208,6 @@ typedef struct SSDataBlock {
   SDataBlockInfo   info;
 } SSDataBlock;
 
-enum {
-  FETCH_TYPE__DATA = 0,
-  FETCH_TYPE__NONE,
-};
-
 typedef struct SVarColAttr {
   int32_t* offset;    // start position for each entry in the list
   uint32_t length;    // used buffer size that contain the valid data
diff --git a/include/libs/executor/executor.h b/include/libs/executor/executor.h
index b7e6c42e3b7ede77237aa7e8e910b45f236b5cc9..1fb00e743fb33f35b2a2dd4344b2f81214832c2d 100644
--- a/include/libs/executor/executor.h
+++ b/include/libs/executor/executor.h
@@ -190,8 +190,6 @@ STimeWindow getAlignQueryTimeWindow(SInterval* pInterval, int32_t precision, int
 
 SArray* qGetQueriedTableListInfo(qTaskInfo_t tinfo);
 
-void verifyOffset(void *pWalReader, STqOffsetVal* pOffset);
-
 int32_t qStreamPrepareScan(qTaskInfo_t tinfo, STqOffsetVal* pOffset, int8_t subType);
 
 void qStreamSetOpen(qTaskInfo_t tinfo);
diff --git a/include/libs/wal/wal.h b/include/libs/wal/wal.h
index 862a1da9d0446dc361a98736056ee4d82e127a98..35a6838b2e0f36ba36ccd41c4e8dd175e2efe7c9 100644
--- a/include/libs/wal/wal.h
+++ b/include/libs/wal/wal.h
@@ -142,7 +142,7 @@ typedef struct {
 typedef struct SWalReader SWalReader;
 
 // todo hide this struct
-typedef struct SWalReader {
+struct SWalReader {
   SWal          *pWal;
   int64_t        readerId;
   TdFilePtr      pLogFile;
@@ -154,7 +154,7 @@ typedef struct SWalReader {
   SWalFilterCond cond;
   // TODO remove it
   SWalCkHead *pHead;
-} SWalReader;
+};
 
 // module initialization
 int32_t walInit();
@@ -201,6 +201,7 @@ int32_t     walNextValidMsg(SWalReader *pRead);
 int64_t     walReaderGetCurrentVer(const SWalReader *pReader);
 int64_t     walReaderGetValidFirstVer(const SWalReader *pReader);
 void        walReaderValidVersionRange(SWalReader *pReader, int64_t *sver, int64_t *ever);
+void        walReaderVerifyOffset(SWalReader *pWalReader, STqOffsetVal* pOffset);
 
 // only for tq usage
 void    walSetReaderCapacity(SWalReader *pRead, int32_t capacity);
diff --git a/source/dnode/vnode/inc/vnode.h b/source/dnode/vnode/inc/vnode.h
index 549173b3f7bb9b29d177ddec3251831b975fcd7c..da5d6f8b3caaea12d68e19c07fe80552bfad13fe 100644
--- a/source/dnode/vnode/inc/vnode.h
+++ b/source/dnode/vnode/inc/vnode.h
@@ -185,7 +185,6 @@ typedef struct STsdbReader STsdbReader;
 int32_t      tsdbReaderOpen(SVnode *pVnode, SQueryTableDataCond *pCond, void *pTableList, int32_t numOfTables,
                             SSDataBlock *pResBlock, STsdbReader **ppReader, const char *idstr, bool countOnly, SHashObj** pIgnoreTables);
 int32_t      tsdbSetTableList(STsdbReader *pReader, const void *pTableList, int32_t num);
-
 void         tsdbReaderSetId(STsdbReader *pReader, const char *idstr);
 void         tsdbReaderClose(STsdbReader *pReader);
 int32_t      tsdbNextDataBlock(STsdbReader *pReader, bool *hasNext);
@@ -198,8 +197,6 @@ int64_t      tsdbGetNumOfRowsInMemTable(STsdbReader *pHandle);
 void        *tsdbGetIdx(SMeta *pMeta);
 void        *tsdbGetIvtIdx(SMeta *pMeta);
 uint64_t     tsdbGetReaderMaxVersion(STsdbReader *pReader);
-int32_t      tsdbSetTableList(STsdbReader *pReader, const void *pTableList, int32_t num);
-void         tsdbReaderSetId(STsdbReader *pReader, const char *idstr);
 void         tsdbReaderSetCloseFlag(STsdbReader *pReader);
 
 int32_t tsdbReuseCacherowsReader(void* pReader, void* pTableIdList, int32_t numOfTables);
@@ -267,7 +264,7 @@ int32_t tqReaderAddTbUidList(STqReader *pReader, const SArray *pTableUidList);
 int32_t tqReaderRemoveTbUidList(STqReader *pReader, const SArray *tbUidList);
 
 int32_t tqSeekVer(STqReader *pReader, int64_t ver, const char *id);
-int32_t tqNextBlockInWal(STqReader* pReader);
+bool    tqNextBlockInWal(STqReader* pReader, const char* idstr);
 bool    tqNextBlockImpl(STqReader *pReader, const char* idstr);
 
 int32_t extractMsgFromWal(SWalReader* pReader, void** pItem, const char* id);
diff --git a/source/dnode/vnode/src/inc/vnodeInt.h b/source/dnode/vnode/src/inc/vnodeInt.h
index 861235a5c397a881bd5d4cd4c90f47adb06d6135..230e8b8f886d532521f2c3419042fb5c9aa8ec6b 100644
--- a/source/dnode/vnode/src/inc/vnodeInt.h
+++ b/source/dnode/vnode/src/inc/vnodeInt.h
@@ -219,8 +219,6 @@ int32_t tqProcessTaskPauseReq(STQ* pTq, int64_t version, char* msg, int32_t msgL
 int32_t tqProcessTaskResumeReq(STQ* pTq, int64_t version, char* msg, int32_t msgLen);
 int32_t tqProcessStreamTaskCheckReq(STQ* pTq, SRpcMsg* pMsg);
 int32_t tqProcessStreamTaskCheckRsp(STQ* pTq, int64_t version, char* msg, int32_t msgLen);
-int32_t tqProcessSubmitReqForSubscribe(STQ* pTq);
-int32_t tqProcessDeleteDataReq(STQ* pTq, void* pReq, int32_t len, int64_t ver);
 int32_t tqProcessTaskRunReq(STQ* pTq, SRpcMsg* pMsg);
 int32_t tqProcessTaskDispatchReq(STQ* pTq, SRpcMsg* pMsg, bool exec);
 int32_t tqProcessTaskDispatchRsp(STQ* pTq, SRpcMsg* pMsg);
diff --git a/source/dnode/vnode/src/tq/tq.c b/source/dnode/vnode/src/tq/tq.c
index e61cc2fdb143b41614aeba70d392e85e560a0539..a8c2a09319b04896117e2beb099ab27731c3591b 100644
--- a/source/dnode/vnode/src/tq/tq.c
+++ b/source/dnode/vnode/src/tq/tq.c
@@ -1195,159 +1195,6 @@ int32_t extractDelDataBlock(const void* pData, int32_t len, int64_t ver, SStream
   return TSDB_CODE_SUCCESS;
 }
 
-int32_t tqProcessDeleteDataReq(STQ* pTq, void* pReq, int32_t len, int64_t ver) {
-  bool        failed = false;
-  SDecoder*   pCoder = &(SDecoder){0};
-  SDeleteRes* pRes = &(SDeleteRes){0};
-
-  pRes->uidList = taosArrayInit(0, sizeof(tb_uid_t));
-  if (pRes->uidList == NULL) {
-    terrno = TSDB_CODE_OUT_OF_MEMORY;
-    failed = true;
-  }
-
-  tDecoderInit(pCoder, pReq, len);
-  tDecodeDeleteRes(pCoder, pRes);
-  tDecoderClear(pCoder);
-
-  int32_t sz = taosArrayGetSize(pRes->uidList);
-  if (sz == 0 || pRes->affectedRows == 0) {
-    taosArrayDestroy(pRes->uidList);
-    return 0;
-  }
-
-  SSDataBlock* pDelBlock = createSpecialDataBlock(STREAM_DELETE_DATA);
-  blockDataEnsureCapacity(pDelBlock, sz);
-  pDelBlock->info.rows = sz;
-  pDelBlock->info.version = ver;
-
-  for (int32_t i = 0; i < sz; i++) {
-    // start key column
-    SColumnInfoData* pStartCol = taosArrayGet(pDelBlock->pDataBlock, START_TS_COLUMN_INDEX);
-    colDataSetVal(pStartCol, i, (const char*)&pRes->skey, false);  // end key column
-    SColumnInfoData* pEndCol = taosArrayGet(pDelBlock->pDataBlock, END_TS_COLUMN_INDEX);
-    colDataSetVal(pEndCol, i, (const char*)&pRes->ekey, false);
-    // uid column
-    SColumnInfoData* pUidCol = taosArrayGet(pDelBlock->pDataBlock, UID_COLUMN_INDEX);
-    int64_t*         pUid = taosArrayGet(pRes->uidList, i);
-    colDataSetVal(pUidCol, i, (const char*)pUid, false);
-
-    colDataSetNULL(taosArrayGet(pDelBlock->pDataBlock, GROUPID_COLUMN_INDEX), i);
-    colDataSetNULL(taosArrayGet(pDelBlock->pDataBlock, CALCULATE_START_TS_COLUMN_INDEX), i);
-    colDataSetNULL(taosArrayGet(pDelBlock->pDataBlock, CALCULATE_END_TS_COLUMN_INDEX), i);
-  }
-
-  taosArrayDestroy(pRes->uidList);
-
-  int32_t* pRef = taosMemoryMalloc(sizeof(int32_t));
-  *pRef = 1;
-
-  taosWLockLatch(&pTq->pStreamMeta->lock);
-
-  void* pIter = NULL;
-  while (1) {
-    pIter = taosHashIterate(pTq->pStreamMeta->pTasks, pIter);
-    if (pIter == NULL) {
-      break;
-    }
-
-    SStreamTask* pTask = *(SStreamTask**)pIter;
-    if (pTask->taskLevel != TASK_LEVEL__SOURCE) {
-      continue;
-    }
-
-    qDebug("s-task:%s delete req enqueue, ver: %" PRId64, pTask->id.idStr, ver);
-
-    if (!failed) {
-      SStreamRefDataBlock* pRefBlock = taosAllocateQitem(sizeof(SStreamRefDataBlock), DEF_QITEM, 0);
-      pRefBlock->type = STREAM_INPUT__REF_DATA_BLOCK;
-      pRefBlock->pBlock = pDelBlock;
-
-      if (tAppendDataToInputQueue(pTask, (SStreamQueueItem*)pRefBlock) < 0) {
-        atomic_sub_fetch_32(pRef, 1);
-        taosFreeQitem(pRefBlock);
-        continue;
-      }
-
-      if (streamSchedExec(pTask) < 0) {
-        qError("s-task:%s stream task launch failed", pTask->id.idStr);
-        continue;
-      }
-
-    } else {
-      streamTaskInputFail(pTask);
-    }
-  }
-
-  taosWUnLockLatch(&pTq->pStreamMeta->lock);
-
-  int32_t ref = atomic_sub_fetch_32(pRef, 1);
-  if (ref == 0) {
-    blockDataDestroy(pDelBlock);
-    taosMemoryFree(pRef);
-  }
-
-#if 0
-    SStreamDataBlock* pStreamBlock = taosAllocateQitem(sizeof(SStreamDataBlock), DEF_QITEM, 0);
-    pStreamBlock->type = STREAM_INPUT__DATA_BLOCK;
-    pStreamBlock->blocks = taosArrayInit(0, sizeof(SSDataBlock));
-    SSDataBlock block = {0};
-    assignOneDataBlock(&block, pDelBlock);
-    block.info.type = STREAM_DELETE_DATA;
-    taosArrayPush(pStreamBlock->blocks, &block);
-
-    if (!failed) {
-      if (tAppendDataToInputQueue(pTask, (SStreamQueueItem*)pStreamBlock) < 0) {
-        qError("stream task input del failed, task id %d", pTask->id.taskId);
-        continue;
-      }
-
-      if (streamSchedExec(pTask) < 0) {
-        qError("stream task launch failed, task id %d", pTask->id.taskId);
-        continue;
-      }
-    } else {
-      streamTaskInputFail(pTask);
-    }
-  }
-  blockDataDestroy(pDelBlock);
-#endif
-  return 0;
-}
-
-int32_t tqProcessSubmitReqForSubscribe(STQ* pTq) {
-  int32_t vgId = TD_VID(pTq->pVnode);
-
-  taosWLockLatch(&pTq->lock);
-
-  if (taosHashGetSize(pTq->pPushMgr) > 0) {
-    void* pIter = taosHashIterate(pTq->pPushMgr, NULL);
-
-    while (pIter) {
-      STqHandle* pHandle = *(STqHandle**)pIter;
-      tqDebug("vgId:%d start set submit for pHandle:%p, consumer:0x%" PRIx64, vgId, pHandle, pHandle->consumerId);
-
-      if (ASSERT(pHandle->msg != NULL)) {
-        tqError("pHandle->msg should not be null");
-        break;
-      }else{
-        SRpcMsg msg = {.msgType = TDMT_VND_TMQ_CONSUME, .pCont = pHandle->msg->pCont, .contLen = pHandle->msg->contLen, .info = pHandle->msg->info};
-        tmsgPutToQueue(&pTq->pVnode->msgCb, QUERY_QUEUE, &msg);
-        taosMemoryFree(pHandle->msg);
-        pHandle->msg = NULL;
-      }
-
-      pIter = taosHashIterate(pTq->pPushMgr, pIter);
-    }
-
-    taosHashClear(pTq->pPushMgr);
-  }
-
-  // unlock
-  taosWUnLockLatch(&pTq->lock);
-  return 0;
-}
-
 int32_t tqProcessTaskRunReq(STQ* pTq, SRpcMsg* pMsg) {
   SStreamTaskRunReq* pReq = pMsg->pCont;
 
diff --git a/source/dnode/vnode/src/tq/tqPush.c b/source/dnode/vnode/src/tq/tqPush.c
index 82a76657fddf2dd0b574b418572cd89c1d898ea6..7f4fe48b8e20c8fb4dd7b67f14ff553bf78e8199 100644
--- a/source/dnode/vnode/src/tq/tqPush.c
+++ b/source/dnode/vnode/src/tq/tqPush.c
@@ -16,8 +16,40 @@
 #include "tq.h"
 #include "vnd.h"
 
-int32_t tqPushMsg(STQ* pTq, void* msg, int32_t msgLen, tmsg_t msgType, int64_t ver) {
+int32_t tqProcessSubmitReqForSubscribe(STQ* pTq) {
+  int32_t vgId = TD_VID(pTq->pVnode);
+
+  taosWLockLatch(&pTq->lock);
+
+  if (taosHashGetSize(pTq->pPushMgr) > 0) {
+    void* pIter = taosHashIterate(pTq->pPushMgr, NULL);
+
+    while (pIter) {
+      STqHandle* pHandle = *(STqHandle**)pIter;
+      tqDebug("vgId:%d start set submit for pHandle:%p, consumer:0x%" PRIx64, vgId, pHandle, pHandle->consumerId);
 
+      if (ASSERT(pHandle->msg != NULL)) {
+        tqError("pHandle->msg should not be null");
+        break;
+      }else{
+        SRpcMsg msg = {.msgType = TDMT_VND_TMQ_CONSUME, .pCont = pHandle->msg->pCont, .contLen = pHandle->msg->contLen, .info = pHandle->msg->info};
+        tmsgPutToQueue(&pTq->pVnode->msgCb, QUERY_QUEUE, &msg);
+        taosMemoryFree(pHandle->msg);
+        pHandle->msg = NULL;
+      }
+
+      pIter = taosHashIterate(pTq->pPushMgr, pIter);
+    }
+
+    taosHashClear(pTq->pPushMgr);
+  }
+
+  // unlock
+  taosWUnLockLatch(&pTq->lock);
+  return 0;
+}
+
+int32_t tqPushMsg(STQ* pTq, void* msg, int32_t msgLen, tmsg_t msgType, int64_t ver) {
   if (msgType == TDMT_VND_SUBMIT) {
     tqProcessSubmitReqForSubscribe(pTq);
   }
@@ -37,10 +69,6 @@ int32_t tqPushMsg(STQ* pTq, void* msg, int32_t msgLen, tmsg_t msgType, int64_t v
     if (msgType == TDMT_VND_SUBMIT || msgType == TDMT_VND_DELETE) {
       tqStartStreamTasks(pTq);
     }
-
-    if (msgType == TDMT_VND_DELETE) {
-//      tqProcessDeleteDataReq(pTq, POINTER_SHIFT(msg, sizeof(SMsgHead)), msgLen - sizeof(SMsgHead), ver);
-    }
   }
 
   return 0;
diff --git a/source/dnode/vnode/src/tq/tqRead.c b/source/dnode/vnode/src/tq/tqRead.c
index 510d54355eb56ec1445fc99f0701999764f0e80d..b756f99f3298a9c1e614839aad1c533036680085 100644
--- a/source/dnode/vnode/src/tq/tqRead.c
+++ b/source/dnode/vnode/src/tq/tqRead.c
@@ -344,7 +344,7 @@ int32_t extractMsgFromWal(SWalReader* pReader, void** pItem, const char* id) {
 }
 
 // todo ignore the error in wal?
-int32_t tqNextBlockInWal(STqReader* pReader) {
+bool tqNextBlockInWal(STqReader* pReader, const char* id) {
   SWalReader* pWalReader = pReader->pWalReader;
 
   while (1) {
@@ -353,7 +353,7 @@ int32_t tqNextBlockInWal(STqReader* pReader) {
       // try next message in wal file
       // todo always retry to avoid read failure caused by wal file deletion
       if (walNextValidMsg(pWalReader) < 0) {
-        return FETCH_TYPE__NONE;
+        return false;
       }
 
       void*   pBody = POINTER_SHIFT(pWalReader->pHead->head.body, sizeof(SSubmitReq2Msg));
@@ -379,24 +379,24 @@ int32_t tqNextBlockInWal(STqReader* pReader) {
       if (tDecodeSubmitReq(&decoder, &pReader->submit) < 0) {
         tDecoderClear(&decoder);
         tqError("decode wal file error, msgLen:%d, ver:%" PRId64, bodyLen, ver);
-        return FETCH_TYPE__NONE;
+        return false;
       }
 
       tDecoderClear(&decoder);
       pReader->nextBlk = 0;
     }
 
-    size_t numOfBlocks = taosArrayGetSize(pReader->submit.aSubmitTbData);
+    int32_t numOfBlocks = taosArrayGetSize(pReader->submit.aSubmitTbData);
     while (pReader->nextBlk < numOfBlocks) {
-      tqDebug("tq reader next data block %p, %d %" PRId64 " %d", pReader->msg.msgStr, pReader->msg.msgLen,
-              pReader->msg.ver, pReader->nextBlk);
+      tqDebug("tq reader next data block %d/%d, len:%d %" PRId64 " %d", pReader->nextBlk,
+          numOfBlocks, pReader->msg.msgLen, pReader->msg.ver, pReader->nextBlk);
 
       SSubmitTbData* pSubmitTbData = taosArrayGet(pReader->submit.aSubmitTbData, pReader->nextBlk);
 
       if (pReader->tbIdHash == NULL) {
         int32_t code = tqRetrieveDataBlock(pReader, NULL);
         if (code == TSDB_CODE_SUCCESS && pReader->pResBlock->info.rows > 0) {
-          return FETCH_TYPE__DATA;
+          return true;
         }
       }
 
@@ -406,7 +406,7 @@ int32_t tqNextBlockInWal(STqReader* pReader) {
 
         int32_t code = tqRetrieveDataBlock(pReader, NULL);
         if (code == TSDB_CODE_SUCCESS && pReader->pResBlock->info.rows > 0) {
-          return FETCH_TYPE__DATA;
+          return true;
         }
       } else {
         pReader->nextBlk += 1;
@@ -414,7 +414,9 @@ int32_t tqNextBlockInWal(STqReader* pReader) {
       }
     }
 
+    qDebug("stream scan return empty, all %d submit blocks consumed, %s", numOfBlocks, id);
     tDestroySubmitReq(&pReader->submit, TSDB_MSG_FLG_DECODE);
+
     pReader->msg.msgStr = NULL;
   }
 }
@@ -730,13 +732,17 @@ int32_t tqRetrieveDataBlock(STqReader* pReader, const char* id) {
   return 0;
 }
 
+// todo refactor:
 int32_t tqRetrieveTaosxBlock(STqReader* pReader, SArray* blocks, SArray* schemas, SSubmitTbData** pSubmitTbDataRet) {
   tqDebug("tq reader retrieve data block %p, %d", pReader->msg.msgStr, pReader->nextBlk);
 
   SSubmitTbData* pSubmitTbData = taosArrayGet(pReader->submit.aSubmitTbData, pReader->nextBlk);
   pReader->nextBlk++;
 
-  if (pSubmitTbDataRet) *pSubmitTbDataRet = pSubmitTbData;
+  if (pSubmitTbDataRet) {
+    *pSubmitTbDataRet = pSubmitTbData;
+  }
+
   int32_t sversion = pSubmitTbData->sver;
   int64_t suid = pSubmitTbData->suid;
   int64_t uid = pSubmitTbData->uid;
diff --git a/source/dnode/vnode/src/tq/tqRestore.c b/source/dnode/vnode/src/tq/tqRestore.c
index 0191a42a78411c907deab09fc418154768b67bba..9acf2454af6a725b8b7a12888830358afe65eac4 100644
--- a/source/dnode/vnode/src/tq/tqRestore.c
+++ b/source/dnode/vnode/src/tq/tqRestore.c
@@ -15,7 +15,7 @@
 
 #include "tq.h"
 
-static int32_t createStreamRunReq(SStreamMeta* pStreamMeta, bool* pScanIdle);
+static int32_t createStreamTaskRunReq(SStreamMeta* pStreamMeta, bool* pScanIdle);
 
 // this function should be executed by stream threads.
 // extract submit block from WAL, and add them into the input queue for the sources tasks.
@@ -30,7 +30,7 @@ int32_t tqStreamTasksScanWal(STQ* pTq) {
 
     // check all restore tasks
     bool shouldIdle = true;
-    createStreamRunReq(pTq->pStreamMeta, &shouldIdle);
+    createStreamTaskRunReq(pTq->pStreamMeta, &shouldIdle);
 
     int32_t times = 0;
 
@@ -57,7 +57,39 @@ int32_t tqStreamTasksScanWal(STQ* pTq) {
   return 0;
 }
 
-int32_t createStreamRunReq(SStreamMeta* pStreamMeta, bool* pScanIdle) {
+static int32_t doSetOffsetForWalReader(SStreamTask *pTask, int32_t vgId) {
+  // seek the stored version and extract data from WAL
+  int64_t firstVer = walReaderGetValidFirstVer(pTask->exec.pWalReader);
+  if (pTask->chkInfo.currentVer < firstVer) {
+    pTask->chkInfo.currentVer = firstVer;
+    tqWarn("vgId:%d s-task:%s ver earlier than the first ver of wal range %" PRId64 ", forward to %" PRId64, vgId,
+           pTask->id.idStr, firstVer, pTask->chkInfo.currentVer);
+
+    // todo need retry if failed
+    int32_t code = walReaderSeekVer(pTask->exec.pWalReader, pTask->chkInfo.currentVer);
+    if (code != TSDB_CODE_SUCCESS) {
+      return code;
+    }
+
+    // append the data for the stream
+    tqDebug("vgId:%d s-task:%s wal reader seek to ver:%" PRId64, vgId, pTask->id.idStr, pTask->chkInfo.currentVer);
+  } else {
+    int64_t currentVer = walReaderGetCurrentVer(pTask->exec.pWalReader);
+    if (currentVer == -1) {  // we only seek the read for the first time
+      int32_t code = walReaderSeekVer(pTask->exec.pWalReader, pTask->chkInfo.currentVer);
+      if (code != TSDB_CODE_SUCCESS) {  // no data in wal, quit
+        return code;
+      }
+
+      // append the data for the stream
+      tqDebug("vgId:%d s-task:%s wal reader initial seek to ver:%" PRId64, vgId, pTask->id.idStr, pTask->chkInfo.currentVer);
+    }
+  }
+
+  return TSDB_CODE_SUCCESS;
+}
+
+int32_t createStreamTaskRunReq(SStreamMeta* pStreamMeta, bool* pScanIdle) {
   *pScanIdle = true;
   bool    noNewDataInWal = true;
   int32_t vgId = pStreamMeta->vgId;
@@ -67,6 +99,7 @@ int32_t createStreamRunReq(SStreamMeta* pStreamMeta, bool* pScanIdle) {
     return TSDB_CODE_SUCCESS;
   }
 
+  // clone the task list, to avoid the task update during scan wal files
   SArray* pTaskList = NULL;
   taosWLockLatch(&pStreamMeta->lock);
   pTaskList = taosArrayDup(pStreamMeta->pTaskList, NULL);
@@ -107,39 +140,15 @@ int32_t createStreamRunReq(SStreamMeta* pStreamMeta, bool* pScanIdle) {
     *pScanIdle = false;
 
     // seek the stored version and extract data from WAL
-    int64_t firstVer = walReaderGetValidFirstVer(pTask->exec.pWalReader);
-    if (pTask->chkInfo.currentVer < firstVer) {
-      pTask->chkInfo.currentVer = firstVer;
-      tqWarn("vgId:%d s-task:%s ver earlier than the first ver of wal range %" PRId64 ", forward to %" PRId64, vgId,
-             pTask->id.idStr, firstVer, pTask->chkInfo.currentVer);
-
-      // todo need retry if failed
-      int32_t code = walReaderSeekVer(pTask->exec.pWalReader, pTask->chkInfo.currentVer);
-      if (code != TSDB_CODE_SUCCESS) {
-        streamMetaReleaseTask(pStreamMeta, pTask);
-        continue;
-      }
-
-      // append the data for the stream
-      tqDebug("vgId:%d s-task:%s wal reader seek to ver:%" PRId64, vgId, pTask->id.idStr, pTask->chkInfo.currentVer);
-    } else {
-      int64_t currentVer = walReaderGetCurrentVer(pTask->exec.pWalReader);
-      if (currentVer == -1) {
-        int32_t code = walReaderSeekVer(pTask->exec.pWalReader, pTask->chkInfo.currentVer);
-        if (code != TSDB_CODE_SUCCESS) {  // no data in wal, quit
-          streamMetaReleaseTask(pStreamMeta, pTask);
-          continue;
-        }
-
-        // append the data for the stream
-        tqDebug("vgId:%d s-task:%s wal reader initial seek to ver:%" PRId64, vgId, pTask->id.idStr,
-                pTask->chkInfo.currentVer);
-      }
+    int32_t code = doSetOffsetForWalReader(pTask, vgId);
+    if (code != TSDB_CODE_SUCCESS) {
+      streamMetaReleaseTask(pStreamMeta, pTask);
+      continue;
     }
 
     // append the data for the stream
     SStreamQueueItem* pItem = NULL;
-    int32_t           code = extractMsgFromWal(pTask->exec.pWalReader, (void**)&pItem, pTask->id.idStr);
+    code = extractMsgFromWal(pTask->exec.pWalReader, (void**) &pItem, pTask->id.idStr);
     if (code != TSDB_CODE_SUCCESS) {  // failed, continue
       streamMetaReleaseTask(pStreamMeta, pTask);
       continue;
diff --git a/source/dnode/vnode/src/tq/tqUtil.c b/source/dnode/vnode/src/tq/tqUtil.c
index aaa497221b0c63b5d179f24c755816380bbc2236..b5308d8b98c225c3aa6209b4648aa183ea690e95 100644
--- a/source/dnode/vnode/src/tq/tqUtil.c
+++ b/source/dnode/vnode/src/tq/tqUtil.c
@@ -249,7 +249,7 @@ static int32_t extractDataAndRspForDbStbSubscribe(STQ* pTq, STqHandle* pHandle,
   }
 
   if (offset->type == TMQ_OFFSET__LOG) {
-    verifyOffset(pHandle->pWalReader, offset);
+    walReaderVerifyOffset(pHandle->pWalReader, offset);
     int64_t fetchVer = offset->version + 1;
     pCkHead = taosMemoryMalloc(sizeof(SWalCkHead) + 2048);
     if (pCkHead == NULL) {
diff --git a/source/libs/executor/src/executor.c b/source/libs/executor/src/executor.c
index a825f56639b12dcb9dd46f6d2a8a51016e3b1622..b6d4615997ec5a62dc92e98372673f77c6f4b3df 100644
--- a/source/libs/executor/src/executor.c
+++ b/source/libs/executor/src/executor.c
@@ -1058,17 +1058,6 @@ void qStreamSetOpen(qTaskInfo_t tinfo) {
   pOperator->status = OP_NOT_OPENED;
 }
 
-void verifyOffset(void *pWalReader, STqOffsetVal* pOffset){
-  // if offset version is small than first version , let's seek to first version
-  taosThreadMutexLock(&((SWalReader*)pWalReader)->pWal->mutex);
-  int64_t firstVer = walGetFirstVer(((SWalReader*)pWalReader)->pWal);
-  taosThreadMutexUnlock(&((SWalReader*)pWalReader)->pWal->mutex);
-
-  if (pOffset->version + 1 < firstVer){
-    pOffset->version = firstVer - 1;
-  }
-}
-
 int32_t qStreamPrepareScan(qTaskInfo_t tinfo, STqOffsetVal* pOffset, int8_t subType) {
   SExecTaskInfo* pTaskInfo = (SExecTaskInfo*)tinfo;
   SOperatorInfo* pOperator = pTaskInfo->pRoot;
@@ -1095,7 +1084,7 @@ int32_t qStreamPrepareScan(qTaskInfo_t tinfo, STqOffsetVal* pOffset, int8_t subT
       tsdbReaderClose(pScanBaseInfo->dataReader);
       pScanBaseInfo->dataReader = NULL;
 
-      verifyOffset(pInfo->tqReader->pWalReader, pOffset);
+      walReaderVerifyOffset(pInfo->tqReader->pWalReader, pOffset);
       if (tqSeekVer(pInfo->tqReader, pOffset->version + 1, id) < 0) {
         qError("tqSeekVer failed ver:%" PRId64 ", %s", pOffset->version + 1, id);
         return -1;
diff --git a/source/libs/executor/src/scanoperator.c b/source/libs/executor/src/scanoperator.c
index 1aa60ea392dd49023d6eb52ab6a70c18a9db1d3d..0537702a754d8e0f0d40f7338f243c3068f20340 100644
--- a/source/libs/executor/src/scanoperator.c
+++ b/source/libs/executor/src/scanoperator.c
@@ -1697,13 +1697,13 @@ static SSDataBlock* doQueueScan(SOperatorInfo* pOperator) {
   if (pTaskInfo->streamInfo.currentOffset.type == TMQ_OFFSET__LOG) {
 
     while (1) {
-      int32_t type = tqNextBlockInWal(pInfo->tqReader);
+      bool hasResult = tqNextBlockInWal(pInfo->tqReader, id);
       SSDataBlock* pRes = pInfo->tqReader->pResBlock;
 
       // curVersion move to next, so currentOffset = curVersion - 1
       tqOffsetResetToLog(&pTaskInfo->streamInfo.currentOffset, pInfo->tqReader->pWalReader->curVersion - 1);
 
-      if (type == FETCH_TYPE__DATA) {
+      if (hasResult) {
         qDebug("doQueueScan get data from log %" PRId64 " rows, version:%" PRId64, pRes->info.rows,
                pTaskInfo->streamInfo.currentOffset.version);
         blockDataCleanup(pInfo->pRes);
@@ -1711,7 +1711,7 @@ static SSDataBlock* doQueueScan(SOperatorInfo* pOperator) {
         if (pInfo->pRes->info.rows > 0) {
           return pInfo->pRes;
         }
-      } else if (type == FETCH_TYPE__NONE) {
+      } else {
         qDebug("doQueueScan get none from log, return, version:%" PRId64, pTaskInfo->streamInfo.currentOffset.version);
         return NULL;
       }
@@ -2074,8 +2074,9 @@ FETCH_NEXT_BLOCK:
       return pInfo->pUpdateRes;
     }
 
-    const char* id = GET_TASKID(pTaskInfo);
-    SDataBlockInfo* pBlockInfo = &pInfo->pRes->info;
+    const char*     id = GET_TASKID(pTaskInfo);
+    SSDataBlock*    pBlock = pInfo->pRes;
+    SDataBlockInfo* pBlockInfo = &pBlock->info;
     int32_t         totalBlocks = taosArrayGetSize(pInfo->pBlockLists);
 
   NEXT_SUBMIT_BLK:
@@ -2086,12 +2087,6 @@ FETCH_NEXT_BLOCK:
           doClearBufferedBlocks(pInfo);
 
           qDebug("stream scan return empty, all %d submit blocks consumed, %s", totalBlocks, id);
-          void* buff = NULL;
-          // int32_t len = streamScanOperatorEncode(pInfo, &buff);
-          // if (len > 0) {
-          //   streamStateSaveInfo(pInfo->pState, STREAM_SCAN_OP_NAME, strlen(STREAM_SCAN_OP_NAME), buff, len);
-          // }
-          taosMemoryFreeClear(buff);
           return NULL;
         }
 
@@ -2105,7 +2100,7 @@ FETCH_NEXT_BLOCK:
         }
       }
 
-      blockDataCleanup(pInfo->pRes);
+      blockDataCleanup(pBlock);
 
       while (tqNextBlockImpl(pInfo->tqReader, id)) {
         int32_t code = tqRetrieveDataBlock(pInfo->tqReader, id);
@@ -2120,10 +2115,10 @@ FETCH_NEXT_BLOCK:
           return pInfo->pCreateTbRes;
         }
 
-        doCheckUpdate(pInfo, pBlockInfo->window.ekey, pInfo->pRes);
-        doFilter(pInfo->pRes, pOperator->exprSupp.pFilterInfo, NULL);
-        pInfo->pRes->info.dataLoad = 1;
-        blockDataUpdateTsWindow(pInfo->pRes, pInfo->primaryTsIndex);
+        doCheckUpdate(pInfo, pBlockInfo->window.ekey, pBlock);
+        doFilter(pBlock, pOperator->exprSupp.pFilterInfo, NULL);
+        pBlock->info.dataLoad = 1;
+        blockDataUpdateTsWindow(pBlock, pInfo->primaryTsIndex);
 
         if (pBlockInfo->rows > 0 || pInfo->pUpdateDataRes->info.rows > 0) {
           break;
@@ -2143,7 +2138,7 @@ FETCH_NEXT_BLOCK:
 
     qDebug("stream scan get source rows:%" PRId64", %s", pBlockInfo->rows, id);
     if (pBlockInfo->rows > 0) {
-      return pInfo->pRes;
+      return pBlock;
     }
 
     if (pInfo->pUpdateDataRes->info.rows > 0) {
@@ -2151,10 +2146,9 @@ FETCH_NEXT_BLOCK:
     }
 
     goto NEXT_SUBMIT_BLK;
-  } else {
-    ASSERT(0);
-    return NULL;
   }
+
+  return NULL;
 }
 
 static SArray* extractTableIdList(const STableListInfo* pTableListInfo) {
@@ -2242,44 +2236,6 @@ static SSDataBlock* doRawScan(SOperatorInfo* pOperator) {
 
     return NULL;
   }
-  //  else if (pTaskInfo->streamInfo.prepareStatus.type == TMQ_OFFSET__LOG) {
-  //    int64_t fetchVer = pTaskInfo->streamInfo.prepareStatus.version + 1;
-  //
-  //    while(1){
-  //      if (tqFetchLog(pInfo->tqReader->pWalReader, pInfo->sContext->withMeta, &fetchVer, &pInfo->pCkHead) < 0) {
-  //        qDebug("tmqsnap tmq poll: consumer log end. offset %" PRId64, fetchVer);
-  //        pTaskInfo->streamInfo.lastStatus.version = fetchVer;
-  //        pTaskInfo->streamInfo.lastStatus.type = TMQ_OFFSET__LOG;
-  //        return NULL;
-  //      }
-  //      SWalCont* pHead = &pInfo->pCkHead->head;
-  //      qDebug("tmqsnap tmq poll: consumer log offset %" PRId64 " msgType %d", fetchVer, pHead->msgType);
-  //
-  //      if (pHead->msgType == TDMT_VND_SUBMIT) {
-  //        SSubmitReq* pCont = (SSubmitReq*)&pHead->body;
-  //        tqReaderSetDataMsg(pInfo->tqReader, pCont, 0);
-  //        SSDataBlock* block = tqLogScanExec(pInfo->sContext->subType, pInfo->tqReader, pInfo->pFilterOutTbUid,
-  //        &pInfo->pRes); if(block){
-  //          pTaskInfo->streamInfo.lastStatus.type = TMQ_OFFSET__LOG;
-  //          pTaskInfo->streamInfo.lastStatus.version = fetchVer;
-  //          qDebug("tmqsnap fetch data msg, ver:%" PRId64 ", type:%d", pHead->version, pHead->msgType);
-  //          return block;
-  //        }else{
-  //          fetchVer++;
-  //        }
-  //      } else{
-  //        ASSERT(pInfo->sContext->withMeta);
-  //        ASSERT(IS_META_MSG(pHead->msgType));
-  //        qDebug("tmqsnap fetch meta msg, ver:%" PRId64 ", type:%d", pHead->version, pHead->msgType);
-  //        pTaskInfo->streamInfo.metaRsp.rspOffset.version = fetchVer;
-  //        pTaskInfo->streamInfo.metaRsp.rspOffset.type = TMQ_OFFSET__LOG;
-  //        pTaskInfo->streamInfo.metaRsp.resMsgType = pHead->msgType;
-  //        pTaskInfo->streamInfo.metaRsp.metaRspLen = pHead->bodyLen;
-  //        pTaskInfo->streamInfo.metaRsp.metaRsp = taosMemoryMalloc(pHead->bodyLen);
-  //        memcpy(pTaskInfo->streamInfo.metaRsp.metaRsp, pHead->body, pHead->bodyLen);
-  //        return NULL;
-  //      }
-  //    }
   return NULL;
 }
 
diff --git a/source/libs/stream/src/streamQueue.c b/source/libs/stream/src/streamQueue.c
index 52d65257698211fc3232e39d7c2c78fb1749781c..4cfeedab57fb289d12643e996f0b4cdd3f65c531 100644
--- a/source/libs/stream/src/streamQueue.c
+++ b/source/libs/stream/src/streamQueue.c
@@ -27,6 +27,7 @@ SStreamQueue* streamQueueOpen(int64_t cap) {
   taosSetQueueCapacity(pQueue->queue, cap);
   taosSetQueueMemoryCapacity(pQueue->queue, cap * 1024);
   return pQueue;
+
 FAIL:
   if (pQueue->queue) taosCloseQueue(pQueue->queue);
   if (pQueue->qall) taosFreeQall(pQueue->qall);
diff --git a/source/libs/wal/src/walRead.c b/source/libs/wal/src/walRead.c
index 627529d95613001561319fa34c479a4d240d2ef9..c29d82bcf394b65beb5dcd94e6d35835e0a7cc60 100644
--- a/source/libs/wal/src/walRead.c
+++ b/source/libs/wal/src/walRead.c
@@ -116,6 +116,17 @@ void walReaderValidVersionRange(SWalReader *pReader, int64_t *sver, int64_t *eve
   *ever = pReader->cond.scanUncommited ? lastVer : committedVer;
 }
 
+void walReaderVerifyOffset(SWalReader *pWalReader, STqOffsetVal* pOffset){
+  // if offset version is small than first version , let's seek to first version
+  taosThreadMutexLock(&pWalReader->pWal->mutex);
+  int64_t firstVer = walGetFirstVer((pWalReader)->pWal);
+  taosThreadMutexUnlock(&pWalReader->pWal->mutex);
+
+  if (pOffset->version + 1 < firstVer){
+    pOffset->version = firstVer - 1;
+  }
+}
+
 static int64_t walReadSeekFilePos(SWalReader *pReader, int64_t fileFirstVer, int64_t ver) {
   int64_t ret = 0;