refactor(mnode): remove unused code

source/dnode/mnode/impl/inc/mndOffset.h

@@ -1,50 +0,0 @@
-/*
- * Copyright (c) 2019 TAOS Data, Inc. <jhtao@taosdata.com>
- *
- * This program is free software: you can use, redistribute, and/or modify
- * it under the terms of the GNU Affero General Public License, version 3
- * or later ("AGPL"), as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.
- *
- * You should have received a copy of the GNU Affero General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
-
-#ifndef _TD_MND_OFFSET_H_
-#define _TD_MND_OFFSET_H_
-
-#include "mndInt.h"
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-int32_t mndInitOffset(SMnode *pMnode);
-void    mndCleanupOffset(SMnode *pMnode);
-
-SMqOffsetObj *mndAcquireOffset(SMnode *pMnode, const char *key);
-void          mndReleaseOffset(SMnode *pMnode, SMqOffsetObj *pOffset);
-
-SSdbRaw *mndOffsetActionEncode(SMqOffsetObj *pOffset);
-SSdbRow *mndOffsetActionDecode(SSdbRaw *pRaw);
-
-int32_t mndCreateOffsets(STrans *pTrans, const char *cgroup, const char *topicName, const SArray *vgs);
-
-static FORCE_INLINE int32_t mndMakePartitionKey(char *key, const char *cgroup, const char *topicName, int32_t vgId) {
-  return snprintf(key, TSDB_PARTITION_KEY_LEN, "%d:%s:%s", vgId, cgroup, topicName);
-}
-
-int32_t mndDropOffsetByDB(SMnode *pMnode, STrans *pTrans, SDbObj *pDb);
-int32_t mndDropOffsetByTopic(SMnode *pMnode, STrans *pTrans, const char *topic);
-int32_t mndDropOffsetBySubKey(SMnode *pMnode, STrans *pTrans, const char *subKey);
-
-bool mndOffsetFromTopic(SMqOffsetObj *pOffset, const char *topic);
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif /*_TD_MND_OFFSET_H_*/

source/dnode/mnode/impl/inc/mndSubscribe.h

@@ -31,6 +31,10 @@ void             mndReleaseSubscribe(SMnode *pMnode, SMqSubscribeObj *pSub);
 
 int32_t mndMakeSubscribeKey(char *key, const char *cgroup, const char *topicName);
 
+static FORCE_INLINE int32_t mndMakePartitionKey(char *key, const char *cgroup, const char *topicName, int32_t vgId) {
+  return snprintf(key, TSDB_PARTITION_KEY_LEN, "%d:%s:%s", vgId, cgroup, topicName);
+}
+
 int32_t mndDropSubByDB(SMnode *pMnode, STrans *pTrans, SDbObj *pDb);
 int32_t mndDropSubByTopic(SMnode *pMnode, STrans *pTrans, const char *topic);
 int32_t mndSetDropSubCommitLogs(SMnode *pMnode, STrans *pTrans, SMqSubscribeObj *pSub);

source/dnode/mnode/impl/src/mndConsumer.c

@@ -18,7 +18,6 @@
 #include "mndDb.h"
 #include "mndDnode.h"
 #include "mndMnode.h"
-#include "mndOffset.h"
 #include "mndPrivilege.h"
 #include "mndShow.h"
 #include "mndStb.h"
@@ -408,12 +407,6 @@ static int32_t mndProcessAskEpReq(SRpcMsg *pMsg) {
             .offset = -1,
         };
 
-        // 2.2.2 fetch vg offset
-        SMqOffsetObj *pOffsetObj = mndAcquireOffset(pMnode, offsetKey);
-        if (pOffsetObj != NULL) {
-          vgEp.offset = atomic_load_64(&pOffsetObj->offset);
-          mndReleaseOffset(pMnode, pOffsetObj);
-        }
         taosArrayPush(topicEp.vgs, &vgEp);
       }
       taosArrayPush(rsp.topics, &topicEp);

source/dnode/mnode/impl/src/mndDb.c

@@ -17,7 +17,6 @@
 #include "mndDb.h"
 #include "mndCluster.h"
 #include "mndDnode.h"
-#include "mndOffset.h"
 #include "mndPrivilege.h"
 #include "mndShow.h"
 #include "mndSma.h"

source/dnode/mnode/impl/src/mndMain.c

@@ -23,7 +23,6 @@
 #include "mndGrant.h"
 #include "mndInfoSchema.h"
 #include "mndMnode.h"
-#include "mndOffset.h"
 #include "mndPerfSchema.h"
 #include "mndPrivilege.h"
 #include "mndProfile.h"
@@ -305,7 +304,6 @@ static int32_t mndInitSteps(SMnode *pMnode) {
   if (mndAllocStep(pMnode, "mnode-topic", mndInitTopic, mndCleanupTopic) != 0) return -1;
   if (mndAllocStep(pMnode, "mnode-consumer", mndInitConsumer, mndCleanupConsumer) != 0) return -1;
   if (mndAllocStep(pMnode, "mnode-subscribe", mndInitSubscribe, mndCleanupSubscribe) != 0) return -1;
-  if (mndAllocStep(pMnode, "mnode-offset", mndInitOffset, mndCleanupOffset) != 0) return -1;
   if (mndAllocStep(pMnode, "mnode-vgroup", mndInitVgroup, mndCleanupVgroup) != 0) return -1;
   if (mndAllocStep(pMnode, "mnode-stb", mndInitStb, mndCleanupStb) != 0) return -1;
   if (mndAllocStep(pMnode, "mnode-sma", mndInitSma, mndCleanupSma) != 0) return -1;

source/dnode/mnode/impl/src/mndOffset.c

@@ -1,370 +0,0 @@
-/*
- * Copyright (c) 2019 TAOS Data, Inc. <jhtao@taosdata.com>
- *
- * This program is free software: you can use, redistribute, and/or modify
- * it under the terms of the GNU Affero General Public License, version 3
- * or later ("AGPL"), as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.
- *
- * You should have received a copy of the GNU Affero General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
-
-#define _DEFAULT_SOURCE
-#include "mndOffset.h"
-#include "mndDb.h"
-#include "mndDnode.h"
-#include "mndMnode.h"
-#include "mndPrivilege.h"
-#include "mndShow.h"
-#include "mndStb.h"
-#include "mndTopic.h"
-#include "mndTrans.h"
-#include "mndUser.h"
-#include "mndVgroup.h"
-#include "tname.h"
-
-#define MND_OFFSET_VER_NUMBER   1
-#define MND_OFFSET_RESERVE_SIZE 64
-
-static int32_t mndOffsetActionInsert(SSdb *pSdb, SMqOffsetObj *pOffset);
-static int32_t mndOffsetActionDelete(SSdb *pSdb, SMqOffsetObj *pOffset);
-static int32_t mndOffsetActionUpdate(SSdb *pSdb, SMqOffsetObj *pOffset, SMqOffsetObj *pNewOffset);
-static int32_t mndProcessCommitOffsetReq(SRpcMsg *pReq);
-
-int32_t mndInitOffset(SMnode *pMnode) {
-  SSdbTable table = {
-      .sdbType = SDB_OFFSET,
-      .keyType = SDB_KEY_BINARY,
-      .encodeFp = (SdbEncodeFp)mndOffsetActionEncode,
-      .decodeFp = (SdbDecodeFp)mndOffsetActionDecode,
-      .insertFp = (SdbInsertFp)mndOffsetActionInsert,
-      .updateFp = (SdbUpdateFp)mndOffsetActionUpdate,
-      .deleteFp = (SdbDeleteFp)mndOffsetActionDelete,
-  };
-
-  mndSetMsgHandle(pMnode, TDMT_MND_MQ_COMMIT_OFFSET, mndProcessCommitOffsetReq);
-
-  return sdbSetTable(pMnode->pSdb, table);
-}
-
-void mndCleanupOffset(SMnode *pMnode) {}
-
-bool mndOffsetFromTopic(SMqOffsetObj *pOffset, const char *topic) {
-  int32_t i = 0;
-  while (pOffset->key[i] != ':') i++;
-  while (pOffset->key[i] != ':') i++;
-  if (strcmp(&pOffset->key[i + 1], topic) == 0) return true;
-  return false;
-}
-
-bool mndOffsetFromSubKey(SMqOffsetObj *pOffset, const char *subKey) {
-  int32_t i = 0;
-  while (pOffset->key[i] != ':') i++;
-  if (strcmp(&pOffset->key[i + 1], subKey) == 0) return true;
-  return false;
-}
-SSdbRaw *mndOffsetActionEncode(SMqOffsetObj *pOffset) {
-  terrno = TSDB_CODE_OUT_OF_MEMORY;
-  void   *buf = NULL;
-  int32_t tlen = tEncodeSMqOffsetObj(NULL, pOffset);
-  int32_t size = sizeof(int32_t) + tlen + MND_OFFSET_RESERVE_SIZE;
-
-  SSdbRaw *pRaw = sdbAllocRaw(SDB_OFFSET, MND_OFFSET_VER_NUMBER, size);
-  if (pRaw == NULL) goto OFFSET_ENCODE_OVER;
-
-  buf = taosMemoryMalloc(tlen);
-  if (buf == NULL) goto OFFSET_ENCODE_OVER;
-
-  void *abuf = buf;
-  tEncodeSMqOffsetObj(&abuf, pOffset);
-
-  int32_t dataPos = 0;
-  SDB_SET_INT32(pRaw, dataPos, tlen, OFFSET_ENCODE_OVER);
-  SDB_SET_BINARY(pRaw, dataPos, buf, tlen, OFFSET_ENCODE_OVER);
-  SDB_SET_RESERVE(pRaw, dataPos, MND_OFFSET_RESERVE_SIZE, OFFSET_ENCODE_OVER);
-  SDB_SET_DATALEN(pRaw, dataPos, OFFSET_ENCODE_OVER);
-
-  terrno = TSDB_CODE_SUCCESS;
-
-OFFSET_ENCODE_OVER:
-  taosMemoryFreeClear(buf);
-  if (terrno != TSDB_CODE_SUCCESS) {
-    mError("offset:%s, failed to encode to raw:%p since %s", pOffset->key, pRaw, terrstr());
-    sdbFreeRaw(pRaw);
-    return NULL;
-  }
-
-  mTrace("offset:%s, encode to raw:%p, row:%p", pOffset->key, pRaw, pOffset);
-  return pRaw;
-}
-
-SSdbRow *mndOffsetActionDecode(SSdbRaw *pRaw) {
-  terrno = TSDB_CODE_OUT_OF_MEMORY;
-  void *buf = NULL;
-
-  int8_t sver = 0;
-  if (sdbGetRawSoftVer(pRaw, &sver) != 0) goto OFFSET_DECODE_OVER;
-
-  if (sver != MND_OFFSET_VER_NUMBER) {
-    terrno = TSDB_CODE_SDB_INVALID_DATA_VER;
-    goto OFFSET_DECODE_OVER;
-  }
-
-  int32_t  size = sizeof(SMqOffsetObj);
-  SSdbRow *pRow = sdbAllocRow(size);
-  if (pRow == NULL) goto OFFSET_DECODE_OVER;
-
-  SMqOffsetObj *pOffset = sdbGetRowObj(pRow);
-  if (pOffset == NULL) goto OFFSET_DECODE_OVER;
-
-  int32_t dataPos = 0;
-  int32_t tlen;
-  SDB_GET_INT32(pRaw, dataPos, &tlen, OFFSET_DECODE_OVER);
-  buf = taosMemoryMalloc(tlen + 1);
-  if (buf == NULL) goto OFFSET_DECODE_OVER;
-  SDB_GET_BINARY(pRaw, dataPos, buf, tlen, OFFSET_DECODE_OVER);
-  SDB_GET_RESERVE(pRaw, dataPos, MND_OFFSET_RESERVE_SIZE, OFFSET_DECODE_OVER);
-
-  if (tDecodeSMqOffsetObj(buf, pOffset) == NULL) {
-    goto OFFSET_DECODE_OVER;
-  }
-
-  terrno = TSDB_CODE_SUCCESS;
-
-OFFSET_DECODE_OVER:
-  taosMemoryFreeClear(buf);
-  if (terrno != TSDB_CODE_SUCCESS) {
-    mError("offset:%s, failed to decode from raw:%p since %s", pOffset->key, pRaw, terrstr());
-    taosMemoryFreeClear(pRow);
-    return NULL;
-  }
-
-  mTrace("offset:%s, decode from raw:%p, row:%p", pOffset->key, pRaw, pOffset);
-  return pRow;
-}
-
-int32_t mndCreateOffsets(STrans *pTrans, const char *cgroup, const char *topicName, const SArray *vgs) {
-  int32_t sz = taosArrayGetSize(vgs);
-  for (int32_t i = 0; i < sz; i++) {
-    int32_t      vgId = *(int32_t *)taosArrayGet(vgs, i);
-    SMqOffsetObj offsetObj = {0};
-    if (mndMakePartitionKey(offsetObj.key, cgroup, topicName, vgId) < 0) {
-      return -1;
-    }
-    // TODO assign db
-    offsetObj.offset = -1;
-    SSdbRaw *pOffsetRaw = mndOffsetActionEncode(&offsetObj);
-    if (pOffsetRaw == NULL) {
-      return -1;
-    }
-    (void)sdbSetRawStatus(pOffsetRaw, SDB_STATUS_READY);
-    // commit log or redo log?
-    if (mndTransAppendRedolog(pTrans, pOffsetRaw) < 0) {
-      return -1;
-    }
-  }
-  return 0;
-}
-
-static int32_t mndProcessCommitOffsetReq(SRpcMsg *pMsg) {
-  char key[TSDB_PARTITION_KEY_LEN];
-
-  SMnode              *pMnode = pMsg->info.node;
-  char                *msgStr = pMsg->pCont;
-  SMqCMCommitOffsetReq commitOffsetReq;
-  SDecoder             decoder;
-  tDecoderInit(&decoder, msgStr, pMsg->contLen);
-
-  tDecodeSMqCMCommitOffsetReq(&decoder, &commitOffsetReq);
-
-  STrans *pTrans = mndTransCreate(pMnode, TRN_POLICY_ROLLBACK, TRN_CONFLICT_NOTHING, pMsg, "commit-offset");
-  if (pTrans == NULL) {
-    terrno = TSDB_CODE_OUT_OF_MEMORY;
-    tDecoderClear(&decoder);
-    return -1;
-  }
-
-  for (int32_t i = 0; i < commitOffsetReq.num; i++) {
-    SMqOffset *pOffset = &commitOffsetReq.offsets[i];
-    mInfo("commit offset %" PRId64 " to vgId:%d of consumer group %s on topic %s", pOffset->offset, pOffset->vgId,
-          pOffset->cgroup, pOffset->topicName);
-    if (mndMakePartitionKey(key, pOffset->cgroup, pOffset->topicName, pOffset->vgId) < 0) {
-      mError("submit offset to topic %s failed", pOffset->topicName);
-      return -1;
-    }
-    bool          create = false;
-    SMqOffsetObj *pOffsetObj = mndAcquireOffset(pMnode, key);
-    if (pOffsetObj == NULL) {
-      SMqTopicObj *pTopic = mndAcquireTopic(pMnode, pOffset->topicName);
-      if (pTopic == NULL) {
-        terrno = TSDB_CODE_MND_TOPIC_NOT_EXIST;
-        mError("submit offset to topic %s failed since %s", pOffset->topicName, terrstr());
-        continue;
-      }
-      pOffsetObj = taosMemoryMalloc(sizeof(SMqOffsetObj));
-      pOffsetObj->dbUid = pTopic->dbUid;
-      mndReleaseTopic(pMnode, pTopic);
-      memcpy(pOffsetObj->key, key, TSDB_PARTITION_KEY_LEN);
-      create = true;
-    }
-    pOffsetObj->offset = pOffset->offset;
-    SSdbRaw *pOffsetRaw = mndOffsetActionEncode(pOffsetObj);
-    (void)sdbSetRawStatus(pOffsetRaw, SDB_STATUS_READY);
-    mndTransAppendCommitlog(pTrans, pOffsetRaw);
-    if (create) {
-      taosMemoryFree(pOffsetObj);
-    } else {
-      mndReleaseOffset(pMnode, pOffsetObj);
-    }
-  }
-
-  tDecoderClear(&decoder);
-
-  if (mndTransPrepare(pMnode, pTrans) != 0) {
-    mError("mq-commit-offset-trans:%d, failed to prepare since %s", pTrans->id, terrstr());
-    mndTransDrop(pTrans);
-    return -1;
-  }
-
-  mndTransDrop(pTrans);
-  return TSDB_CODE_ACTION_IN_PROGRESS;
-}
-
-static int32_t mndOffsetActionInsert(SSdb *pSdb, SMqOffsetObj *pOffset) {
-  mTrace("offset:%s, perform insert action", pOffset->key);
-  return 0;
-}
-
-static int32_t mndOffsetActionDelete(SSdb *pSdb, SMqOffsetObj *pOffset) {
-  mTrace("offset:%s, perform delete action", pOffset->key);
-  return 0;
-}
-
-static int32_t mndOffsetActionUpdate(SSdb *pSdb, SMqOffsetObj *pOldOffset, SMqOffsetObj *pNewOffset) {
-  mTrace("offset:%s, perform update action", pOldOffset->key);
-  atomic_store_64(&pOldOffset->offset, pNewOffset->offset);
-  return 0;
-}
-
-SMqOffsetObj *mndAcquireOffset(SMnode *pMnode, const char *key) {
-  SSdb         *pSdb = pMnode->pSdb;
-  SMqOffsetObj *pOffset = sdbAcquire(pSdb, SDB_OFFSET, key);
-  if (pOffset == NULL && terrno == TSDB_CODE_SDB_OBJ_NOT_THERE) {
-    terrno = TSDB_CODE_MND_OFFSET_NOT_EXIST;
-  }
-  return pOffset;
-}
-
-void mndReleaseOffset(SMnode *pMnode, SMqOffsetObj *pOffset) {
-  SSdb *pSdb = pMnode->pSdb;
-  sdbRelease(pSdb, pOffset);
-}
-
-static void mndCancelGetNextOffset(SMnode *pMnode, void *pIter) {
-  SSdb *pSdb = pMnode->pSdb;
-  sdbCancelFetch(pSdb, pIter);
-}
-
-static int32_t mndSetDropOffsetCommitLogs(SMnode *pMnode, STrans *pTrans, SMqOffsetObj *pOffset) {
-  SSdbRaw *pCommitRaw = mndOffsetActionEncode(pOffset);
-  if (pCommitRaw == NULL) return -1;
-  if (mndTransAppendCommitlog(pTrans, pCommitRaw) != 0) return -1;
-  if (sdbSetRawStatus(pCommitRaw, SDB_STATUS_DROPPED) != 0) return -1;
-  return 0;
-}
-
-static int32_t mndSetDropOffsetRedoLogs(SMnode *pMnode, STrans *pTrans, SMqOffsetObj *pOffset) {
-  SSdbRaw *pRedoRaw = mndOffsetActionEncode(pOffset);
-  if (pRedoRaw == NULL) return -1;
-  if (mndTransAppendRedolog(pTrans, pRedoRaw) != 0) return -1;
-  if (sdbSetRawStatus(pRedoRaw, SDB_STATUS_DROPPED) != 0) return -1;
-  return 0;
-}
-
-int32_t mndDropOffsetByDB(SMnode *pMnode, STrans *pTrans, SDbObj *pDb) {
-  int32_t code = 0;
-  SSdb   *pSdb = pMnode->pSdb;
-
-  void         *pIter = NULL;
-  SMqOffsetObj *pOffset = NULL;
-  while (1) {
-    pIter = sdbFetch(pSdb, SDB_OFFSET, pIter, (void **)&pOffset);
-    if (pIter == NULL) break;
-
-    if (pOffset->dbUid != pDb->uid) {
-      sdbRelease(pSdb, pOffset);
-      continue;
-    }
-
-    if (mndSetDropOffsetCommitLogs(pMnode, pTrans, pOffset) < 0) {
-      sdbRelease(pSdb, pOffset);
-      sdbCancelFetch(pSdb, pIter);
-      code = -1;
-      break;
-    }
-
-    sdbRelease(pSdb, pOffset);
-  }
-
-  return code;
-}
-
-int32_t mndDropOffsetByTopic(SMnode *pMnode, STrans *pTrans, const char *topic) {
-  int32_t code = -1;
-  SSdb   *pSdb = pMnode->pSdb;
-
-  void         *pIter = NULL;
-  SMqOffsetObj *pOffset = NULL;
-  while (1) {
-    pIter = sdbFetch(pSdb, SDB_OFFSET, pIter, (void **)&pOffset);
-    if (pIter == NULL) break;
-
-    if (!mndOffsetFromTopic(pOffset, topic)) {
-      sdbRelease(pSdb, pOffset);
-      continue;
-    }
-
-    if (mndSetDropOffsetCommitLogs(pMnode, pTrans, pOffset) < 0) {
-      sdbRelease(pSdb, pOffset);
-      goto END;
-    }
-
-    sdbRelease(pSdb, pOffset);
-  }
-
-  code = 0;
-END:
-  return code;
-}
-
-int32_t mndDropOffsetBySubKey(SMnode *pMnode, STrans *pTrans, const char *subKey) {
-  int32_t code = -1;
-  SSdb   *pSdb = pMnode->pSdb;
-
-  void         *pIter = NULL;
-  SMqOffsetObj *pOffset = NULL;
-  while (1) {
-    pIter = sdbFetch(pSdb, SDB_OFFSET, pIter, (void **)&pOffset);
-    if (pIter == NULL) break;
-
-    if (!mndOffsetFromSubKey(pOffset, subKey)) {
-      sdbRelease(pSdb, pOffset);
-      continue;
-    }
-
-    if (mndSetDropOffsetCommitLogs(pMnode, pTrans, pOffset) < 0) {
-      sdbRelease(pSdb, pOffset);
-      goto END;
-    }
-
-    sdbRelease(pSdb, pOffset);
-  }
-
-  code = 0;
-END:
-  return code;
-}

source/dnode/mnode/impl/src/mndScheduler.c

@@ -18,7 +18,6 @@
 #include "mndDb.h"
 #include "mndDnode.h"
 #include "mndMnode.h"
-#include "mndOffset.h"
 #include "mndShow.h"
 #include "mndSnode.h"
 #include "mndStb.h"

source/dnode/mnode/impl/src/mndSubscribe.c

@@ -19,7 +19,6 @@
 #include "mndDb.h"
 #include "mndDnode.h"
 #include "mndMnode.h"
-#include "mndOffset.h"
 #include "mndScheduler.h"
 #include "mndShow.h"
 #include "mndStb.h"
@@ -683,12 +682,6 @@ static int32_t mndProcessDropCgroupReq(SRpcMsg *pReq) {
 
   mInfo("trans:%d, used to drop cgroup:%s on topic %s", pTrans->id, dropReq.cgroup, dropReq.topic);
 
-  if (mndDropOffsetBySubKey(pMnode, pTrans, pSub->key) < 0) {
-    mndReleaseSubscribe(pMnode, pSub);
-    mndTransDrop(pTrans);
-    return -1;
-  }
-
   if (mndSetDropSubCommitLogs(pMnode, pTrans, pSub) < 0) {
     mError("cgroup %s on topic:%s, failed to drop since %s", dropReq.cgroup, dropReq.topic, terrstr());
     mndReleaseSubscribe(pMnode, pSub);

source/dnode/mnode/impl/src/mndTopic.c

@@ -18,7 +18,6 @@
 #include "mndDb.h"
 #include "mndDnode.h"
 #include "mndMnode.h"
-#include "mndOffset.h"
 #include "mndPrivilege.h"
 #include "mndShow.h"
 #include "mndStb.h"

source/dnode/vnode/src/tq/tq.c

@@ -671,8 +671,6 @@ int32_t tqProcessPollReq(STQ* pTq, SRpcMsg* pMsg) {
         if (tqTaosxScanLog(pTq, pHandle, pCont, &taosxRsp) < 0) {
           /*ASSERT(0);*/
         }
-        // TODO batch optimization:
-        // TODO continue scan until meeting batch requirement
         if (taosxRsp.blockNum > 0 /* threshold */) {
           tqOffsetResetToLog(&taosxRsp.rspOffset, fetchVer);
           if (tqSendTaosxRsp(pTq, pMsg, pReq, &taosxRsp) < 0) {