diff --git a/include/common/tmsg.h b/include/common/tmsg.h
index 398e46e6a4..ef5a854d20 100644
--- a/include/common/tmsg.h
+++ b/include/common/tmsg.h
@@ -1533,9 +1533,7 @@ typedef struct SMqSetCVgReq {
   char*    sql;
   char*    logicalPlan;
   char*    physicalPlan;
-  uint32_t qmsgLen;
-  void*    qmsg;
-  //SSubQueryMsg msg;
+  char*    qmsg;
 } SMqSetCVgReq;
 
 static FORCE_INLINE int32_t tEncodeSSubQueryMsg(void** buf, const SSubQueryMsg* pMsg) {
@@ -1567,7 +1565,6 @@ static FORCE_INLINE int32_t tEncodeSMqSetCVgReq(void** buf, const SMqSetCVgReq*
   tlen += taosEncodeString(buf, pReq->sql);
   tlen += taosEncodeString(buf, pReq->logicalPlan);
   tlen += taosEncodeString(buf, pReq->physicalPlan);
-  tlen += taosEncodeFixedU32(buf, pReq->qmsgLen);
   tlen += taosEncodeString(buf, (char*)pReq->qmsg);
   //tlen += tEncodeSSubQueryMsg(buf, &pReq->msg);
   return tlen;
@@ -1582,7 +1579,6 @@ static FORCE_INLINE void* tDecodeSMqSetCVgReq(void* buf, SMqSetCVgReq* pReq) {
   buf = taosDecodeString(buf, &pReq->sql);
   buf = taosDecodeString(buf, &pReq->logicalPlan);
   buf = taosDecodeString(buf, &pReq->physicalPlan);
-  buf = taosDecodeFixedU32(buf, &pReq->qmsgLen);
   buf = taosDecodeString(buf, (char**)&pReq->qmsg);
   //buf = tDecodeSSubQueryMsg(buf, &pReq->msg);
   return buf;
@@ -1600,37 +1596,41 @@ typedef struct SMqColData {
   int16_t colId;
   int16_t type;
   int16_t bytes;
-  char    data[];
-} SMqColData;
+} SMqColMeta;
 
 typedef struct SMqTbData {
   int64_t    uid;
-  int32_t    numOfCols;
   int32_t    numOfRows;
-  SMqColData colData[];
+  char       colData[];
 } SMqTbData;
 
 typedef struct SMqTopicBlk {
-  char      topicName[TSDB_TOPIC_FNAME_LEN];
-  int64_t   committedOffset;
-  int64_t   reqOffset;
-  int64_t   rspOffset;
-  int32_t   skipLogNum;
-  int32_t   bodyLen;
-  int32_t   numOfTb;
-  SMqTbData tbData[];
+  char       topicName[TSDB_TOPIC_FNAME_LEN];
+  int64_t    committedOffset;
+  int64_t    reqOffset;
+  int64_t    rspOffset;
+  int32_t    skipLogNum;
+  int32_t    bodyLen;
+  int32_t    numOfTb;
+  SMqTbData* tbData;
 } SMqTopicData;
 
 typedef struct SMqConsumeRsp {
-  int64_t      reqId;
-  int64_t      consumerId;
-  int32_t      bodyLen;
-  int32_t      numOfTopics;
-  SMqTopicData data[];
+  int64_t       consumerId;
+  int32_t       numOfCols;
+  SMqColMeta*   meta;
+  int32_t       numOfTopics;
+  SMqTopicData* data;
 } SMqConsumeRsp;
 
+static FORCE_INLINE int32_t tEncodeSMqConsumeRsp(void** buf, const SMqConsumeRsp* pRsp) {
+  int32_t tlen = 0;
+  return tlen;
+}
+
 // one req for one vg+topic
 typedef struct SMqConsumeReq {
+  SMsgHead       head;
   //0: commit only, current offset
   //1: consume only, poll next offset
   //2: commit current and consume next offset
@@ -1663,7 +1663,7 @@ typedef struct SMqCMGetSubEpRsp {
 
 static FORCE_INLINE int32_t tEncodeSMqSubVgEp(void** buf, const SMqSubVgEp* pVgEp) {
   int32_t tlen = 0;
-  tlen += taosEncodeFixedI16(buf, pVgEp->vgId);
+  tlen += taosEncodeFixedI32(buf, pVgEp->vgId);
   tlen += taosEncodeSEpSet(buf, &pVgEp->epSet);
   return tlen;
 }
diff --git a/include/libs/wal/wal.h b/include/libs/wal/wal.h
index 641b485f4c..45f1d88c30 100644
--- a/include/libs/wal/wal.h
+++ b/include/libs/wal/wal.h
@@ -19,6 +19,7 @@
 #include "tarray.h"
 #include "tdef.h"
 #include "tlog.h"
+#include "tmsg.h"
 #ifdef __cplusplus
 extern "C" {
 #endif
@@ -159,7 +160,7 @@ int32_t walAlter(SWal *, SWalCfg *pCfg);
 void    walClose(SWal *);
 
 // write
-int64_t walWrite(SWal *, int64_t index, uint8_t msgType, const void *body, int32_t bodyLen);
+int64_t walWrite(SWal *, int64_t index, tmsg_t msgType, const void *body, int32_t bodyLen);
 void    walFsync(SWal *, bool force);
 
 // apis for lifecycle management
diff --git a/include/util/taoserror.h b/include/util/taoserror.h
index 69bf085491..8f49fce558 100644
--- a/include/util/taoserror.h
+++ b/include/util/taoserror.h
@@ -253,6 +253,7 @@ int32_t* taosGetErrno();
 #define TSDB_CODE_MND_INVALID_TOPIC_OPTION      TAOS_DEF_ERROR_CODE(0, 0x03E4)
 #define TSDB_CODE_MND_TOPIC_OPTION_UNCHNAGED    TAOS_DEF_ERROR_CODE(0, 0x03E5)
 #define TSDB_CODE_MND_NAME_CONFLICT_WITH_STB    TAOS_DEF_ERROR_CODE(0, 0x03E6)
+#define TSDB_CODE_MND_CONSUMER_NOT_EXIST        TAOS_DEF_ERROR_CODE(0, 0x03E7)
 
 // dnode
 #define TSDB_CODE_DND_ACTION_IN_PROGRESS        TAOS_DEF_ERROR_CODE(0, 0x0400)
diff --git a/source/client/src/clientImpl.c b/source/client/src/clientImpl.c
index 28a4e0c87d..df086463db 100644
--- a/source/client/src/clientImpl.c
+++ b/source/client/src/clientImpl.c
@@ -328,6 +328,7 @@ struct tmq_t {
   char           clientId[256];
   int64_t        consumerId;
   int64_t        status;
+  tsem_t         rspSem;
   STscObj*       pTscObj;
   tmq_commit_cb* commit_cb;
   int32_t        nextTopicIdx;
@@ -344,6 +345,7 @@ tmq_t* taos_consumer_new(void* conn, tmq_conf_t* conf, char* errstr, int32_t err
   strcpy(pTmq->clientId, conf->clientId);
   strcpy(pTmq->groupId, conf->groupId);
   pTmq->commit_cb = conf->commit_cb;
+  tsem_init(&pTmq->rspSem, 0, 0);
   pTmq->consumerId = generateRequestId() & ((uint64_t)-1 >> 1);
   pTmq->clientTopics = taosArrayInit(0, sizeof(SMqClientTopic));
   return pTmq;
@@ -372,11 +374,27 @@ int32_t tmq_list_append(tmq_list_t* ptr, char* src) {
 }
 
 
+int32_t tmq_null_cb(void* param, const SDataBuf* pMsg, int32_t code)  {
+  if (code == 0) {
+    //
+  }
+  //
+  return 0;
+}
+
 TAOS_RES* tmq_subscribe(tmq_t* tmq, tmq_list_t* topic_list) {
   SRequestObj *pRequest = NULL;
-  tmq->status = 1;
   int32_t sz = topic_list->cnt;
-  tmq->clientTopics = taosArrayInit(sz, sizeof(void*));
+  //destroy ex
+  taosArrayDestroy(tmq->clientTopics);
+  tmq->clientTopics = taosArrayInit(sz, sizeof(SMqClientTopic));
+
+  SCMSubscribeReq req;
+  req.topicNum = sz;
+  req.consumerId = tmq->consumerId;
+  req.consumerGroup = strdup(tmq->groupId);
+  req.topicNames = taosArrayInit(sz, sizeof(void*));
+
   for (int i = 0; i < sz; i++) {
     char* topicName = topic_list->elems[i];
 
@@ -391,16 +409,21 @@ TAOS_RES* tmq_subscribe(tmq_t* tmq, tmq_list_t* topic_list) {
     }
     tNameExtractFullName(&name, topicFname);
     tscDebug("subscribe topic: %s", topicFname);
-    taosArrayPush(tmq->clientTopics, &topicFname); 
+    SMqClientTopic topic = {
+      .nextVgIdx = 0,
+      .sql = NULL,
+      .sqlLen = 0,
+      .topicId = 0,
+      .topicName = topicFname,
+      .vgs = NULL
+    };
+    topic.vgs = taosArrayInit(0, sizeof(SMqClientVg));
+    taosArrayPush(tmq->clientTopics, &topic); 
     /*SMqClientTopic topic = {*/
       /*.*/
     /*};*/
+    taosArrayPush(req.topicNames, &topicFname);
   }
-  SCMSubscribeReq req;
-  req.topicNum = taosArrayGetSize(tmq->clientTopics);
-  req.consumerId = tmq->consumerId;
-  req.consumerGroup = strdup(tmq->groupId);
-  req.topicNames = tmq->clientTopics;
 
   int tlen = tSerializeSCMSubscribeReq(NULL, &req);
   void* buf = malloc(tlen);
@@ -419,18 +442,19 @@ TAOS_RES* tmq_subscribe(tmq_t* tmq, tmq_list_t* topic_list) {
 
   pRequest->body.requestMsg = (SDataBuf){ .pData = buf, .len = tlen };
 
-  SMsgSendInfo* body = buildMsgInfoImpl(pRequest);
+  SMsgSendInfo* sendInfo = buildMsgInfoImpl(pRequest);
+  /*sendInfo->fp*/
   SEpSet epSet = getEpSet_s(&tmq->pTscObj->pAppInfo->mgmtEp);
 
   int64_t transporterId = 0;
-  asyncSendMsgToServer(tmq->pTscObj->pAppInfo->pTransporter, &epSet, &transporterId, body);
+  asyncSendMsgToServer(tmq->pTscObj->pAppInfo->pTransporter, &epSet, &transporterId, sendInfo);
 
   tsem_wait(&pRequest->body.rspSem);
 
 _return:
-  if (body != NULL) {
-    destroySendMsgInfo(body);
-  }
+  /*if (sendInfo != NULL) {*/
+    /*destroySendMsgInfo(sendInfo);*/
+  /*}*/
 
   if (pRequest != NULL && terrno != TSDB_CODE_SUCCESS) {
     pRequest->code = terrno;
@@ -569,19 +593,19 @@ TAOS_RES *taos_create_topic(TAOS* taos, const char* topicName, const char* sql,
   pRequest->body.requestMsg = (SDataBuf){ .pData = buf, .len = tlen };
   pRequest->type = TDMT_MND_CREATE_TOPIC;
 
-  SMsgSendInfo* body = buildMsgInfoImpl(pRequest);
+  SMsgSendInfo* sendInfo = buildMsgInfoImpl(pRequest);
   SEpSet epSet = getEpSet_s(&pTscObj->pAppInfo->mgmtEp);
 
   int64_t transporterId = 0;
-  asyncSendMsgToServer(pTscObj->pAppInfo->pTransporter, &epSet, &transporterId, body);
+  asyncSendMsgToServer(pTscObj->pAppInfo->pTransporter, &epSet, &transporterId, sendInfo);
 
   tsem_wait(&pRequest->body.rspSem);
 
 _return:
   qDestroyQuery(pQueryNode);
-  if (body != NULL) {
-    destroySendMsgInfo(body);
-  }
+  /*if (sendInfo != NULL) {*/
+    /*destroySendMsgInfo(sendInfo);*/
+  /*}*/
 
   if (pRequest != NULL && terrno != TSDB_CODE_SUCCESS) {
     pRequest->code = terrno;
@@ -602,6 +626,12 @@ int32_t tmq_poll_cb_inner(void* param, const SDataBuf* pMsg, int32_t code) {
 
 int32_t tmq_ask_ep_cb(void* param, const SDataBuf* pMsg, int32_t code) {
   tmq_t* tmq = (tmq_t*)param;
+  if (code != 0) {
+    tsem_post(&tmq->rspSem);
+    return 0;
+  }
+  tscDebug("tmq ask ep cb called");
+  bool set = false;
   SMqCMGetSubEpRsp rsp;
   tDecodeSMqCMGetSubEpRsp(pMsg->pData, &rsp);
   int32_t sz = taosArrayGetSize(rsp.topics);
@@ -616,38 +646,35 @@ int32_t tmq_ask_ep_cb(void* param, const SDataBuf* pMsg, int32_t code) {
     for (int32_t j = 0; j < vgSz; j++) {
       SMqSubVgEp* pVgEp = taosArrayGet(pTopicEp->vgs, j);
       SMqClientVg clientVg = {
+        .pollCnt = 0,
+        .committedOffset = -1,
+        .currentOffset = -1,
         .vgId = pVgEp->vgId,
         .epSet = pVgEp->epSet
       };
       taosArrayPush(topic.vgs, &clientVg);
+      set = true;
     }
     taosArrayPush(tmq->clientTopics, &topic);
   }
+  if(set) tmq->status = 1;
   // unlock
+  tsem_post(&tmq->rspSem);
   return 0;
 }
 
 tmq_message_t* tmq_consume_poll(tmq_t* tmq, int64_t blocking_time) {
-  if (tmq->clientTopics == NULL || taosArrayGetSize(tmq->clientTopics) == 0) {
-    return NULL;
-  }
-  SRequestObj *pRequest = NULL;
-  SMqConsumeReq req = {0};
-  req.reqType = 1;
-  req.blockingTime = blocking_time;
-  req.consumerId = tmq->consumerId;
-  tmq_message_t* tmq_message = NULL;
-  strcpy(req.cgroup, tmq->groupId);
 
-  if (taosArrayGetSize(tmq->clientTopics) == 0) {
+  if (taosArrayGetSize(tmq->clientTopics) == 0 || tmq->status == 0) {
     int32_t tlen = sizeof(SMqCMGetSubEpReq);
     SMqCMGetSubEpReq* buf = malloc(tlen);
     if (buf == NULL) {
       tscError("failed to malloc get subscribe ep buf");
     }
-    buf->consumerId = htobe64(buf->consumerId);
+    buf->consumerId = htobe64(tmq->consumerId);
+    strcpy(buf->cgroup, tmq->groupId);
     
-    pRequest = createRequest(tmq->pTscObj, NULL, NULL, TDMT_MND_GET_SUB_EP);
+    SRequestObj *pRequest = createRequest(tmq->pTscObj, NULL, NULL, TDMT_MND_GET_SUB_EP);
     if (pRequest == NULL) {
       tscError("failed to malloc subscribe ep request");
     }
@@ -664,24 +691,39 @@ tmq_message_t* tmq_consume_poll(tmq_t* tmq, int64_t blocking_time) {
     int64_t transporterId = 0;
     asyncSendMsgToServer(tmq->pTscObj->pAppInfo->pTransporter, &epSet, &transporterId, sendInfo);
 
-    tsem_wait(&pRequest->body.rspSem);
+    tsem_wait(&tmq->rspSem);
   }
 
-  SMqClientTopic* pTopic = taosArrayGetP(tmq->clientTopics, tmq->nextTopicIdx);
+  if (taosArrayGetSize(tmq->clientTopics) == 0) {
+    tscDebug("consumer:%ld poll but not assigned", tmq->consumerId);
+    return NULL;
+  }
+
+  SMqConsumeReq* pReq = malloc(sizeof(SMqConsumeReq));
+  pReq->reqType = 1;
+  pReq->blockingTime = blocking_time;
+  pReq->consumerId = tmq->consumerId;
+  tmq_message_t* tmq_message = NULL;
+  strcpy(pReq->cgroup, tmq->groupId);
+
+  SMqClientTopic* pTopic = taosArrayGet(tmq->clientTopics, tmq->nextTopicIdx);
   tmq->nextTopicIdx = (tmq->nextTopicIdx + 1) % taosArrayGetSize(tmq->clientTopics);
-  strcpy(req.topic, pTopic->topicName);
+  strcpy(pReq->topic, pTopic->topicName);
   int32_t nextVgIdx = pTopic->nextVgIdx;
   pTopic->nextVgIdx = (nextVgIdx + 1) % taosArrayGetSize(pTopic->vgs);
   SMqClientVg* pVg = taosArrayGet(pTopic->vgs, nextVgIdx);
-  req.offset = pVg->currentOffset;
+  pReq->offset = pVg->currentOffset;
 
-  pRequest->body.requestMsg = (SDataBuf){ .pData = &req, .len = sizeof(SMqConsumeReq) };
-  pRequest->type = TDMT_VND_CONSUME;
+  pReq->head.vgId = htonl(pVg->vgId);
+  pReq->head.contLen = htonl(sizeof(SMqConsumeReq));
+
+  SRequestObj* pRequest = createRequest(tmq->pTscObj, NULL, NULL, TDMT_VND_CONSUME);
+  pRequest->body.requestMsg = (SDataBuf){ .pData = pReq, .len = sizeof(SMqConsumeReq) };
 
   SMsgSendInfo* sendInfo = buildMsgInfoImpl(pRequest);
-  sendInfo->requestObjRefId = 0;
-  sendInfo->param = &tmq_message;
-  sendInfo->fp = tmq_poll_cb_inner;
+  /*sendInfo->requestObjRefId = 0;*/
+  /*sendInfo->param = &tmq_message;*/
+  /*sendInfo->fp = tmq_poll_cb_inner;*/
 
   int64_t transporterId = 0;
   asyncSendMsgToServer(tmq->pTscObj->pAppInfo->pTransporter, &pVg->epSet, &transporterId, sendInfo);
diff --git a/source/client/test/clientTests.cpp b/source/client/test/clientTests.cpp
index a1adf58f6a..b73079741c 100644
--- a/source/client/test/clientTests.cpp
+++ b/source/client/test/clientTests.cpp
@@ -536,7 +536,7 @@ TEST(testCase, create_topic_Test) {
   if (taos_errno(pRes) != 0) {
     printf("error in use db, reason:%s\n", taos_errstr(pRes));
   }
-  taos_free_result(pRes);
+  //taos_free_result(pRes);
 
   TAOS_FIELD* pFields = taos_fetch_fields(pRes);
   ASSERT_TRUE(pFields == nullptr);
@@ -570,30 +570,32 @@ TEST(testCase, create_topic_Test) {
   //taos_close(pConn);
 //}
 
-//TEST(testCase, tmq_subscribe_Test) {
-  //TAOS* pConn = taos_connect("localhost", "root", "taosdata", NULL, 0);
-  //assert(pConn != NULL);
+#if 0
+TEST(testCase, tmq_subscribe_Test) {
+  TAOS* pConn = taos_connect("localhost", "root", "taosdata", NULL, 0);
+  assert(pConn != NULL);
 
-  //TAOS_RES* pRes = taos_query(pConn, "use abc1");
-  //if (taos_errno(pRes) != 0) {
-    //printf("error in use db, reason:%s\n", taos_errstr(pRes));
-  //}
-  //taos_free_result(pRes);
+  TAOS_RES* pRes = taos_query(pConn, "use abc1");
+  if (taos_errno(pRes) != 0) {
+    printf("error in use db, reason:%s\n", taos_errstr(pRes));
+  }
+  taos_free_result(pRes);
 
-  //tmq_conf_t* conf = tmq_conf_new();
-  //tmq_conf_set(conf, "group.id", "tg1");
-  //tmq_t* tmq = taos_consumer_new(pConn, conf, NULL, 0);
+  tmq_conf_t* conf = tmq_conf_new();
+  tmq_conf_set(conf, "group.id", "tg1");
+  tmq_t* tmq = taos_consumer_new(pConn, conf, NULL, 0);
   
-  //tmq_list_t* topic_list = tmq_list_new();
-  //tmq_list_append(topic_list, "test_topic_1");
-  //tmq_subscribe(tmq, topic_list);
+  tmq_list_t* topic_list = tmq_list_new();
+  tmq_list_append(topic_list, "test_topic_1");
+  tmq_subscribe(tmq, topic_list);
 
-  //while (1) {
-    //tmq_message_t* msg = tmq_consume_poll(tmq, 0);
-    //printf("get msg\n");
+  while (1) {
+    tmq_message_t* msg = tmq_consume_poll(tmq, 0);
+    printf("get msg\n");
     //if (msg == NULL) break;
-  //}
-//}
+  }
+}
+#endif
 
 TEST(testCase, tmq_consume_Test) {
 }
diff --git a/source/dnode/mgmt/impl/src/dndTransport.c b/source/dnode/mgmt/impl/src/dndTransport.c
index 0c6994e24d..257c72bff5 100644
--- a/source/dnode/mgmt/impl/src/dndTransport.c
+++ b/source/dnode/mgmt/impl/src/dndTransport.c
@@ -149,6 +149,7 @@ static void dndInitMsgFp(STransMgmt *pMgmt) {
   pMgmt->msgFp[TMSG_INDEX(TDMT_VND_SHOW_TABLES_FETCH)] = dndProcessVnodeFetchMsg;
   pMgmt->msgFp[TMSG_INDEX(TDMT_VND_MQ_SET_CONN)] = dndProcessVnodeWriteMsg;
   pMgmt->msgFp[TMSG_INDEX(TDMT_VND_MQ_SET_CUR)] = dndProcessVnodeFetchMsg;
+  pMgmt->msgFp[TMSG_INDEX(TDMT_VND_CONSUME)] = dndProcessVnodeFetchMsg;
 }
 
 static void dndProcessResponse(void *parent, SRpcMsg *pRsp, SEpSet *pEpSet) {
diff --git a/source/dnode/mnode/impl/inc/mndDef.h b/source/dnode/mnode/impl/inc/mndDef.h
index 02ce3a1591..2a23618798 100644
--- a/source/dnode/mnode/impl/inc/mndDef.h
+++ b/source/dnode/mnode/impl/inc/mndDef.h
@@ -363,9 +363,7 @@ typedef struct SMqConsumerEp {
   int64_t      consumerId;  // -1 for unassigned
   int64_t      lastConsumerHbTs;
   int64_t      lastVgHbTs;
-  uint32_t     qmsgLen;
   char*        qmsg;
-  //SSubQueryMsg qExec;
 } SMqConsumerEp;
 
 static FORCE_INLINE int32_t tEncodeSMqConsumerEp(void** buf, SMqConsumerEp* pConsumerEp) {
@@ -374,9 +372,10 @@ static FORCE_INLINE int32_t tEncodeSMqConsumerEp(void** buf, SMqConsumerEp* pCon
   tlen += taosEncodeFixedI32(buf, pConsumerEp->status);
   tlen += taosEncodeSEpSet(buf, &pConsumerEp->epSet);
   tlen += taosEncodeFixedI64(buf, pConsumerEp->consumerId);
+  tlen += taosEncodeFixedI64(buf, pConsumerEp->lastConsumerHbTs);
+  tlen += taosEncodeFixedI64(buf, pConsumerEp->lastVgHbTs);
   //tlen += tEncodeSSubQueryMsg(buf, &pConsumerEp->qExec);
-  tlen += taosEncodeFixedU32(buf, pConsumerEp->qmsgLen);
-  tlen += taosEncodeBinary(buf, pConsumerEp->qmsg, pConsumerEp->qmsgLen);
+  tlen += taosEncodeString(buf, pConsumerEp->qmsg);
   return tlen;
 }
 
@@ -385,9 +384,10 @@ static FORCE_INLINE void* tDecodeSMqConsumerEp(void** buf, SMqConsumerEp* pConsu
   buf = taosDecodeFixedI32(buf, &pConsumerEp->status);
   buf = taosDecodeSEpSet(buf, &pConsumerEp->epSet);
   buf = taosDecodeFixedI64(buf, &pConsumerEp->consumerId);
+  buf = taosDecodeFixedI64(buf, &pConsumerEp->lastConsumerHbTs);
+  buf = taosDecodeFixedI64(buf, &pConsumerEp->lastVgHbTs);
   //buf = tDecodeSSubQueryMsg(buf, &pConsumerEp->qExec);
-  buf = taosDecodeFixedU32(buf, &pConsumerEp->qmsgLen);
-  buf = taosDecodeBinary(buf, (void**)&pConsumerEp->qmsg, pConsumerEp->qmsgLen);
+  buf = taosDecodeString(buf, &pConsumerEp->qmsg);
   return buf;
 }
 
@@ -423,18 +423,27 @@ static FORCE_INLINE SMqSubscribeObj* tNewSubscribeObj() {
     free(pSub);
     return NULL;
   }
-  pSub->idleConsumer = taosArrayInit(0, sizeof(SMqConsumerEp));
-  if (pSub->assigned == NULL) {
+  pSub->lostConsumer = taosArrayInit(0, sizeof(SMqConsumerEp));
+  if (pSub->lostConsumer == NULL) {
     taosArrayDestroy(pSub->availConsumer);
-    taosArrayDestroy(pSub->idleConsumer);
+    taosArrayDestroy(pSub->assigned);
+    free(pSub);
+    return NULL;
+  }
+  pSub->idleConsumer = taosArrayInit(0, sizeof(SMqConsumerEp));
+  if (pSub->idleConsumer == NULL) {
+    taosArrayDestroy(pSub->availConsumer);
+    taosArrayDestroy(pSub->assigned);
+    taosArrayDestroy(pSub->lostConsumer);
     free(pSub);
     return NULL;
   }
   pSub->unassignedVg = taosArrayInit(0, sizeof(SMqConsumerEp));
-  if (pSub->assigned == NULL) {
+  if (pSub->unassignedVg == NULL) {
     taosArrayDestroy(pSub->availConsumer);
+    taosArrayDestroy(pSub->assigned);
+    taosArrayDestroy(pSub->lostConsumer);
     taosArrayDestroy(pSub->idleConsumer);
-    taosArrayDestroy(pSub->unassignedVg);
     free(pSub);
     return NULL;
   }
@@ -461,6 +470,13 @@ static FORCE_INLINE int32_t tEncodeSubscribeObj(void** buf, const SMqSubscribeOb
     tlen += tEncodeSMqConsumerEp(buf, pCEp);
   }
 
+  sz = taosArrayGetSize(pSub->lostConsumer);
+  tlen += taosEncodeFixedI32(buf, sz);
+  for (int32_t i = 0; i < sz; i++) {
+    SMqConsumerEp* pCEp = taosArrayGet(pSub->lostConsumer, i);
+    tlen += tEncodeSMqConsumerEp(buf, pCEp);
+  }
+
   sz = taosArrayGetSize(pSub->idleConsumer);
   tlen += taosEncodeFixedI32(buf, sz);
   for (int32_t i = 0; i < sz; i++) {
@@ -485,20 +501,47 @@ static FORCE_INLINE void* tDecodeSubscribeObj(void* buf, SMqSubscribeObj* pSub)
   int32_t sz;
 
   buf = taosDecodeFixedI32(buf, &sz);
-  pSub->assigned = taosArrayInit(sz, sizeof(int64_t));
-  if (pSub->assigned == NULL) {
+  pSub->availConsumer = taosArrayInit(sz, sizeof(int64_t));
+  if (pSub->availConsumer == NULL) {
     return NULL;
   }
   for (int32_t i = 0; i < sz; i++) {
     int64_t consumerId;
     buf = taosDecodeFixedI64(buf, &consumerId);
-    taosArrayPush(pSub->assigned, &consumerId);
+    taosArrayPush(pSub->availConsumer, &consumerId);
+  }
+
+  buf = taosDecodeFixedI32(buf, &sz);
+  pSub->assigned = taosArrayInit(sz, sizeof(SMqConsumerEp));
+  if (pSub->assigned == NULL) {
+    taosArrayDestroy(pSub->availConsumer);
+    return NULL;
+  }
+  for (int32_t i = 0; i < sz; i++) {
+    SMqConsumerEp cEp;
+    buf = tDecodeSMqConsumerEp(buf, &cEp);
+    taosArrayPush(pSub->assigned, &cEp);
+  }
+
+  buf = taosDecodeFixedI32(buf, &sz);
+  pSub->lostConsumer = taosArrayInit(sz, sizeof(SMqConsumerEp));
+  if (pSub->lostConsumer == NULL) {
+    taosArrayDestroy(pSub->availConsumer);
+    taosArrayDestroy(pSub->assigned);
+    return NULL;
+  }
+  for (int32_t i = 0; i < sz; i++) {
+    SMqConsumerEp cEp;
+    buf = tDecodeSMqConsumerEp(buf, &cEp);
+    taosArrayPush(pSub->lostConsumer, &cEp);
   }
 
   buf = taosDecodeFixedI32(buf, &sz);
   pSub->idleConsumer = taosArrayInit(sz, sizeof(SMqConsumerEp));
   if (pSub->idleConsumer == NULL) {
+    taosArrayDestroy(pSub->availConsumer);
     taosArrayDestroy(pSub->assigned);
+    taosArrayDestroy(pSub->lostConsumer);
     return NULL;
   }
   for (int32_t i = 0; i < sz; i++) {
@@ -507,10 +550,13 @@ static FORCE_INLINE void* tDecodeSubscribeObj(void* buf, SMqSubscribeObj* pSub)
     taosArrayPush(pSub->idleConsumer, &cEp);
   }
 
+
   buf = taosDecodeFixedI32(buf, &sz);
   pSub->unassignedVg = taosArrayInit(sz, sizeof(SMqConsumerEp));
   if (pSub->unassignedVg == NULL) {
+    taosArrayDestroy(pSub->availConsumer);
     taosArrayDestroy(pSub->assigned);
+    taosArrayDestroy(pSub->lostConsumer);
     taosArrayDestroy(pSub->idleConsumer);
     return NULL;
   }
@@ -580,6 +626,7 @@ static FORCE_INLINE int32_t tEncodeSMqConsumerTopic(void** buf, SMqConsumerTopic
   int32_t tlen = 0;
   tlen += taosEncodeString(buf, pConsumerTopic->name);
   tlen += taosEncodeFixedI32(buf, pConsumerTopic->epoch);
+  ASSERT(pConsumerTopic->pVgInfo);
   int32_t sz = taosArrayGetSize(pConsumerTopic->pVgInfo);
   tlen += taosEncodeFixedI32(buf, sz);
   for (int32_t i = 0; i < sz; i++) {
diff --git a/source/dnode/mnode/impl/src/mndSubscribe.c b/source/dnode/mnode/impl/src/mndSubscribe.c
index df6a4a82f3..87f66297a4 100644
--- a/source/dnode/mnode/impl/src/mndSubscribe.c
+++ b/source/dnode/mnode/impl/src/mndSubscribe.c
@@ -66,13 +66,13 @@ int32_t mndInitSubscribe(SMnode *pMnode) {
 
 static int32_t mndProcessGetSubEpReq(SMnodeMsg *pMsg) {
   SMnode           *pMnode = pMsg->pMnode;
-  SMqCMGetSubEpReq *pReq = (SMqCMGetSubEpReq *)pMsg->pCont;
+  SMqCMGetSubEpReq *pReq = (SMqCMGetSubEpReq *)pMsg->rpcMsg.pCont;
   SMqCMGetSubEpRsp  rsp;
   int64_t           consumerId = be64toh(pReq->consumerId);
 
   SMqConsumerObj *pConsumer = mndAcquireConsumer(pMsg->pMnode, consumerId);
   if (pConsumer == NULL) {
-    /*terrno = */
+    terrno = TSDB_CODE_MND_CONSUMER_NOT_EXIST;
     return -1;
   }
   ASSERT(strcmp(pReq->cgroup, pConsumer->cgroup) == 0);
@@ -91,9 +91,13 @@ static int32_t mndProcessGetSubEpReq(SMnodeMsg *pMsg) {
     int32_t          assignedSz = taosArrayGetSize(pSub->assigned);
     topicEp.vgs = taosArrayInit(assignedSz, sizeof(SMqSubVgEp));
     for (int32_t j = 0; j < assignedSz; j++) {
-      SMqConsumerEp *pCEp = taosArrayGet(pSub->assigned, i);
+      SMqConsumerEp *pCEp = taosArrayGet(pSub->assigned, j);
       if (pCEp->consumerId == consumerId) {
-        taosArrayPush(pSub->assigned, pCEp);
+        SMqSubVgEp vgEp = {
+          .epSet = pCEp->epSet,
+          .vgId = pCEp->vgId
+        };
+        taosArrayPush(topicEp.vgs, &vgEp);
       }
     }
     if (taosArrayGetSize(topicEp.vgs) != 0) {
@@ -101,7 +105,7 @@ static int32_t mndProcessGetSubEpReq(SMnodeMsg *pMsg) {
     }
   }
   int32_t tlen = tEncodeSMqCMGetSubEpRsp(NULL, &rsp);
-  void   *buf = malloc(tlen);
+  void   *buf = rpcMallocCont(tlen);
   if (buf == NULL) {
     terrno = TSDB_CODE_OUT_OF_MEMORY;
     return -1;
@@ -161,8 +165,6 @@ static int32_t mndProcessMqTimerMsg(SMnodeMsg *pMsg) {
         pReq->sql = strdup(pTopic->sql);
         pReq->logicalPlan = strdup(pTopic->logicalPlan);
         pReq->physicalPlan = strdup(pTopic->physicalPlan);
-        pReq->qmsgLen = pCEp->qmsgLen;
-        /*memcpy(pReq->qmsg, pCEp->qmsg, pCEp->qmsgLen);*/
         pReq->qmsg = strdup(pCEp->qmsg);
         int32_t tlen = tEncodeSMqSetCVgReq(NULL, pReq);
         void   *reqStr = malloc(tlen);
@@ -192,7 +194,7 @@ static int32_t mndProcessMqTimerMsg(SMnodeMsg *pMsg) {
       if (mndTransPrepare(pMnode, pTrans) != 0) {
         mError("trans:%d, failed to prepare since %s", pTrans->id, terrstr());
       }
-      mndReleaseTopic(pMnode, pTopic);
+      /*mndReleaseTopic(pMnode, pTopic);*/
       mndTransDrop(pTrans);
     }
     pIter = sdbFetch(pSdb, SDB_SUBSCRIBE, NULL, (void **)&pSub);
@@ -220,6 +222,7 @@ static int mndInitUnassignedVg(SMnode *pMnode, SMqTopicObj *pTopic, SArray *unas
   for (int32_t i = 0; i < sz; i++) {
     SMqConsumerEp CEp;
     CEp.status = 0;
+    CEp.consumerId = -1;
     CEp.lastConsumerHbTs = CEp.lastVgHbTs = -1;
     STaskInfo *pTaskInfo = taosArrayGet(pArray, i);
     tConvertQueryAddrToEpSet(&CEp.epSet, &pTaskInfo->addr);
@@ -227,13 +230,6 @@ static int mndInitUnassignedVg(SMnode *pMnode, SMqTopicObj *pTopic, SArray *unas
      * CEp.epSet.fqdn[2], CEp.epSet.fqdn[3], CEp.epSet.fqdn[4]);*/
     CEp.vgId = pTaskInfo->addr.nodeId;
     CEp.qmsg = strdup(pTaskInfo->msg->msg);
-    CEp.qmsgLen = strlen(CEp.qmsg) + 1;
-    printf("abc:\n%s\n", CEp.qmsg);
-    /*CEp.qmsg = malloc(CEp.qmsgLen);*/
-    /*if (CEp.qmsg == NULL) {*/
-    /*return -1;*/
-    /*}*/
-    /*memcpy(CEp.qmsg, pTaskInfo->msg->msg, pTaskInfo->msg->contentLen);*/
     taosArrayPush(unassignedVg, &CEp);
   }
 
@@ -257,8 +253,7 @@ static int mndBuildMqSetConsumerVgReq(SMnode *pMnode, STrans *pTrans, SMqConsume
     req.sql = pTopic->sql;
     req.logicalPlan = pTopic->logicalPlan;
     req.physicalPlan = pTopic->physicalPlan;
-    req.qmsg = strdup(pCEp->qmsg);
-    req.qmsgLen = strlen(req.qmsg);
+    req.qmsg = pCEp->qmsg;
     int32_t tlen = tEncodeSMqSetCVgReq(NULL, &req);
     void   *buf = malloc(sizeof(SMsgHead) + tlen);
     if (buf == NULL) {
@@ -631,14 +626,14 @@ static int32_t mndProcessSubscribeReq(SMnodeMsg *pMsg) {
     mError("trans:%d, failed to prepare since %s", pTrans->id, terrstr());
     if (newSub) taosArrayDestroy(newSub);
     mndTransDrop(pTrans);
-    mndReleaseConsumer(pMnode, pConsumer);
+    /*mndReleaseConsumer(pMnode, pConsumer);*/
     return -1;
   }
 
   if (newSub) taosArrayDestroy(newSub);
   mndTransDrop(pTrans);
-  mndReleaseConsumer(pMnode, pConsumer);
-  return 0;
+  /*mndReleaseConsumer(pMnode, pConsumer);*/
+  return TSDB_CODE_MND_ACTION_IN_PROGRESS;
 }
 
 static int32_t mndProcessSubscribeInternalRsp(SMnodeMsg *pRsp) {
diff --git a/source/dnode/mnode/impl/src/mndTopic.c b/source/dnode/mnode/impl/src/mndTopic.c
index fa043cf7a0..6b4cb4ba59 100644
--- a/source/dnode/mnode/impl/src/mndTopic.c
+++ b/source/dnode/mnode/impl/src/mndTopic.c
@@ -237,7 +237,7 @@ static int32_t mndCreateTopic(SMnode *pMnode, SMnodeMsg *pMsg, SCMCreateTopicReq
   tstrncpy(topicObj.db, pDb->name, TSDB_DB_FNAME_LEN);
   topicObj.createTime = taosGetTimestampMs();
   topicObj.updateTime = topicObj.createTime;
-  topicObj.uid = mndGenerateUid(pCreate->name, TSDB_TABLE_FNAME_LEN);
+  topicObj.uid = mndGenerateUid(pCreate->name, strlen(pCreate->name));
   topicObj.dbUid = pDb->uid;
   topicObj.version = 1;
   topicObj.sql = strdup(pCreate->sql);
diff --git a/source/dnode/vnode/src/tq/tq.c b/source/dnode/vnode/src/tq/tq.c
index c164487aa2..4fb4b0eeae 100644
--- a/source/dnode/vnode/src/tq/tq.c
+++ b/source/dnode/vnode/src/tq/tq.c
@@ -679,6 +679,7 @@ int32_t tqProcessConsumeReq(STQ* pTq, SRpcMsg* pMsg) {
   int              rspLen = 0;
 
   STqConsumerHandle* pConsumer = tqHandleGet(pTq->tqMeta, consumerId);
+  ASSERT(pConsumer);
   int                sz = taosArrayGetSize(pConsumer->topics);
 
   for (int i = 0; i < sz; i++) {
@@ -735,23 +736,6 @@ int32_t tqProcessConsumeReq(STQ* pTq, SRpcMsg* pMsg) {
         break;
       }
       if (pDataBlock != NULL) {
-        SMqTbData tbData = {
-          .uid = pDataBlock->info.uid,
-          .numOfCols = pDataBlock->info.numOfCols,
-          .numOfRows = pDataBlock->info.rows,
-        };
-        for (int i = 0; i < pDataBlock->info.numOfCols; i++) {
-          SColumnInfoData* pColData = taosArrayGet(pDataBlock->pDataBlock, i);
-          int32_t sz = pColData->info.bytes * pDataBlock->info.rows;
-          SMqColData colData = {
-            .bytes = pColData->info.bytes,
-            .colId = pColData->info.colId,
-            .type = pColData->info.type,
-          };
-          memcpy(colData.data, pColData->pData, colData.bytes * pDataBlock->info.rows);
-          memcpy(&tbData.colData[i], &colData, sz);
-        }
-        /*pDataBlock->info.*/
         taosArrayPush(pRes, pDataBlock);
       } else {
         break;
@@ -792,6 +776,8 @@ int32_t tqProcessSetConnReq(STQ* pTq, char* msg) {
   }
   strcpy(pConsumer->cgroup, req.cgroup);
   pConsumer->topics = taosArrayInit(0, sizeof(STqTopicHandle));
+  pConsumer->consumerId = req.newConsumerId;
+  pConsumer->epoch = 0;
 
   STqTopicHandle* pTopic = calloc(sizeof(STqTopicHandle), 1);
   if (pTopic == NULL) {
@@ -802,6 +788,8 @@ int32_t tqProcessSetConnReq(STQ* pTq, char* msg) {
   pTopic->sql = strdup(req.sql);
   pTopic->logicalPlan = strdup(req.logicalPlan);
   pTopic->physicalPlan = strdup(req.physicalPlan);
+  pTopic->committedOffset = -1;
+  pTopic->currentOffset = -1;
 
   pTopic->buffer.firstOffset = -1;
   pTopic->buffer.lastOffset = -1;
@@ -814,6 +802,8 @@ int32_t tqProcessSetConnReq(STQ* pTq, char* msg) {
     pTopic->buffer.output[i].task = qCreateStreamExecTaskInfo(req.qmsg, pReadHandle);
   }
   taosArrayPush(pConsumer->topics, pTopic);
+  tqHandleMovePut(pTq->tqMeta, req.newConsumerId, pConsumer);
+  tqHandleCommit(pTq->tqMeta, req.newConsumerId);
   terrno = TSDB_CODE_SUCCESS;
   return 0;
 }
@@ -838,7 +828,7 @@ void tqReadHandleSetMsg(STqReadHandle* pReadHandle, SSubmitMsg* pMsg, int64_t ve
 }
 
 bool tqNextDataBlock(STqReadHandle* pHandle) {
-  while (tGetSubmitMsgNext(&pHandle->msgIter, &pHandle->pBlock) >= 0) {
+  while (tGetSubmitMsgNext(&pHandle->msgIter, &pHandle->pBlock)) {
     if (pHandle->tbUid == pHandle->pBlock->uid) return true;
   }
   return false;
diff --git a/source/libs/wal/CMakeLists.txt b/source/libs/wal/CMakeLists.txt
index 4d2dd97c87..bcf759e04f 100644
--- a/source/libs/wal/CMakeLists.txt
+++ b/source/libs/wal/CMakeLists.txt
@@ -11,6 +11,7 @@ target_link_libraries(
     PUBLIC cjson
     PUBLIC os
     PUBLIC util
+    PUBLIC common
 )
 
 if(${BUILD_TEST})
diff --git a/source/libs/wal/src/walWrite.c b/source/libs/wal/src/walWrite.c
index 2bc328b4e2..a4b34dee37 100644
--- a/source/libs/wal/src/walWrite.c
+++ b/source/libs/wal/src/walWrite.c
@@ -257,7 +257,7 @@ static int walWriteIndex(SWal *pWal, int64_t ver, int64_t offset) {
   return 0;
 }
 
-int64_t walWrite(SWal *pWal, int64_t index, uint8_t msgType, const void *body, int32_t bodyLen) {
+int64_t walWrite(SWal *pWal, int64_t index, tmsg_t msgType, const void *body, int32_t bodyLen) {
   if (pWal == NULL) return -1;
   int code = 0;