diff --git a/2.0/src/query/src/queryMain.c b/2.0/src/query/src/queryMain.c
index 3bf031ebd5..e6d804cea3 100644
--- a/2.0/src/query/src/queryMain.c
+++ b/2.0/src/query/src/queryMain.c
@@ -461,7 +461,7 @@ int32_t qKillQuery(qinfo_t qinfo) {
   }
 
   qDebug("QInfo:0x%"PRIx64" query killed", pQInfo->qId);
-  setQueryKilled(pQInfo);
+  setTaskKilled(pQInfo);
 
   // Wait for the query executing thread being stopped/
   // Once the query is stopped, the owner of qHandle will be cleared immediately.
@@ -634,7 +634,7 @@ int32_t qKillQueryByQId(void* pMgmt, int64_t qId, int32_t waitMs, int32_t waitCo
     return TSDB_CODE_QRY_INVALID_QHANDLE;
   }
   qWarn("QId:0x%"PRIx64" be killed(no memory commit).", pQInfo->qId);
-  setQueryKilled(pQInfo);
+  setTaskKilled(pQInfo);
 
   // wait query stop
   int32_t loop = 0;
diff --git a/include/common/tmsg.h b/include/common/tmsg.h
index 9ee1aeca86..b3d595d73b 100644
--- a/include/common/tmsg.h
+++ b/include/common/tmsg.h
@@ -1519,15 +1519,17 @@ static FORCE_INLINE void* taosDecodeSMqMsg(void* buf, SMqHbMsg* pMsg) {
 }
 
 typedef struct SMqSetCVgReq {
-  int32_t vgId;
-  int64_t oldConsumerId;
-  int64_t newConsumerId;
-  char    topicName[TSDB_TOPIC_FNAME_LEN];
-  char    cgroup[TSDB_CONSUMER_GROUP_LEN];
-  char*   sql;
-  char*   logicalPlan;
-  char*   physicalPlan;
-  SSubQueryMsg msg;
+  int32_t  vgId;
+  int64_t  oldConsumerId;
+  int64_t  newConsumerId;
+  char     topicName[TSDB_TOPIC_FNAME_LEN];
+  char     cgroup[TSDB_CONSUMER_GROUP_LEN];
+  char*    sql;
+  char*    logicalPlan;
+  char*    physicalPlan;
+  uint32_t qmsgLen;
+  void*    qmsg;
+  //SSubQueryMsg msg;
 } SMqSetCVgReq;
 
 static FORCE_INLINE int32_t tEncodeSSubQueryMsg(void** buf, const SSubQueryMsg* pMsg) {
@@ -1536,7 +1538,7 @@ static FORCE_INLINE int32_t tEncodeSSubQueryMsg(void** buf, const SSubQueryMsg*
   tlen += taosEncodeFixedU64(buf, pMsg->queryId);
   tlen += taosEncodeFixedU64(buf, pMsg->taskId);
   tlen += taosEncodeFixedU32(buf, pMsg->contentLen);
-  tlen += taosEncodeBinary(buf, pMsg->msg, pMsg->contentLen);
+  //tlen += taosEncodeBinary(buf, pMsg->msg, pMsg->contentLen);
   return tlen;
 }
 
@@ -1545,7 +1547,7 @@ static FORCE_INLINE void* tDecodeSSubQueryMsg(void* buf, SSubQueryMsg* pMsg) {
   buf = taosDecodeFixedU64(buf, &pMsg->queryId);
   buf = taosDecodeFixedU64(buf, &pMsg->taskId);
   buf = taosDecodeFixedU32(buf, &pMsg->contentLen);
-  buf = taosDecodeBinaryTo(buf, pMsg->msg, pMsg->contentLen);
+  //buf = taosDecodeBinaryTo(buf, pMsg->msg, pMsg->contentLen);
   return buf;
 }
 
@@ -1559,7 +1561,9 @@ 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 += tEncodeSSubQueryMsg(buf, &pReq->msg);
+  tlen += taosEncodeFixedU32(buf, pReq->qmsgLen);
+  tlen += taosEncodeBinary(buf, pReq->qmsg, pReq->qmsgLen);
+  //tlen += tEncodeSSubQueryMsg(buf, &pReq->msg);
   return tlen;
 }
 
@@ -1572,15 +1576,18 @@ 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 = tDecodeSSubQueryMsg(buf, &pReq->msg);
+  buf = taosDecodeFixedU32(buf, &pReq->qmsgLen);
+  buf = taosDecodeBinary(buf, &pReq->qmsg, pReq->qmsgLen);
+  //buf = tDecodeSSubQueryMsg(buf, &pReq->msg);
   return buf;
 }
 
 typedef struct SMqSetCVgRsp {
-  int32_t vgId;
-  int64_t consumerId;
-  char    topicName[TSDB_TOPIC_FNAME_LEN];
-  char    cGroup[TSDB_CONSUMER_GROUP_LEN];
+  SMsgHead header;
+  int32_t  vgId;
+  int64_t  consumerId;
+  char     topicName[TSDB_TOPIC_FNAME_LEN];
+  char     cGroup[TSDB_CONSUMER_GROUP_LEN];
 } SMqSetCVgRsp;
 
 typedef struct SMqColData {
diff --git a/include/libs/executor/executor.h b/include/libs/executor/executor.h
index 457245e9a3..020f9f7ccd 100644
--- a/include/libs/executor/executor.h
+++ b/include/libs/executor/executor.h
@@ -32,7 +32,7 @@ struct SSubplan;
   * @param streamReadHandle
   * @return
   */
-qTaskInfo_t qCreateStreamExecTaskInfo(SSubQueryMsg *pMsg, void* streamReadHandle);
+qTaskInfo_t qCreateStreamExecTaskInfo(void *msg, void* streamReadHandle);
 
 int32_t     qSetStreamInput(qTaskInfo_t tinfo, void* input);
 
diff --git a/include/libs/parser/parser.h b/include/libs/parser/parser.h
index ecfa344f85..1d193888c9 100644
--- a/include/libs/parser/parser.h
+++ b/include/libs/parser/parser.h
@@ -74,6 +74,7 @@ void columnListCopy(SArray* dst, const SArray* src, uint64_t uid);
 void columnListDestroy(SArray* pColumnList);
 
 void dropAllExprInfo(SArray** pExprInfo, int32_t numOfLevel);
+void dropOneLevelExprInfo(SArray* pExprInfo);
 
 typedef struct SSourceParam {
   SArray    *pExprNodeList; //Array<struct tExprNode*>
diff --git a/include/os/os.h b/include/os/os.h
index 9112b4922f..023d2b0470 100644
--- a/include/os/os.h
+++ b/include/os/os.h
@@ -51,6 +51,7 @@ extern "C" {
 #include <libgen.h>
 
 #include <sys/mman.h>
+#include <sys/prctl.h>
 
 #include "osAtomic.h"
 #include "osDef.h"
diff --git a/include/os/osDef.h b/include/os/osDef.h
index 040c4bc7e7..07d360a7c0 100644
--- a/include/os/osDef.h
+++ b/include/os/osDef.h
@@ -181,7 +181,8 @@ extern "C" {
   #endif
 #else
   // Windows
-  #define setThreadName(name)
+//  #define setThreadName(name)
+#define setThreadName(name) do { prctl(PR_SET_NAME, (name)); } while (0)
 #endif
 
 #if defined(_WIN32)
diff --git a/source/client/src/clientImpl.c b/source/client/src/clientImpl.c
index 6014042e11..179e46527f 100644
--- a/source/client/src/clientImpl.c
+++ b/source/client/src/clientImpl.c
@@ -218,6 +218,7 @@ int32_t getPlan(SRequestObj* pRequest, SQueryNode* pQueryNode, SQueryDag** pDag,
 
   if (pQueryNode->type == TSDB_SQL_SELECT) {
     setResSchemaInfo(&pRequest->body.resInfo, pSchema, numOfCols);
+    tfree(pSchema);
     pRequest->type = TDMT_VND_QUERY;
   } else {
     tfree(pSchema);
@@ -313,10 +314,10 @@ tmq_conf_t* tmq_conf_new() {
 }
 
 int32_t tmq_conf_set(tmq_conf_t* conf, const char* key, const char* value) {
-  if (strcmp(key, "group.id")) {
+  if (strcmp(key, "group.id") == 0) {
     strcpy(conf->groupId, value);
   }
-  if (strcmp(key, "client.id")) {
+  if (strcmp(key, "client.id") == 0) {
     strcpy(conf->clientId, value);
   }
   return 0;
@@ -364,7 +365,7 @@ tmq_list_t* tmq_list_new() {
 
 int32_t tmq_list_append(tmq_list_t* ptr, char* src) {
   if (ptr->cnt >= ptr->tot-1) return -1;
-  ptr->elems[ptr->cnt] = src;
+  ptr->elems[ptr->cnt] = strdup(src);
   ptr->cnt++;
   return 0;
 }
@@ -376,8 +377,23 @@ TAOS_RES* tmq_subscribe(tmq_t* tmq, tmq_list_t* topic_list) {
   int32_t sz = topic_list->cnt;
   tmq->clientTopics = taosArrayInit(sz, sizeof(void*));
   for (int i = 0; i < sz; i++) {
-    char* topicName = strdup(topic_list->elems[i]);
-    taosArrayPush(tmq->clientTopics, &topicName); 
+    char* topicName = topic_list->elems[i];
+
+    SName name = {0};
+    char* dbName = getDbOfConnection(tmq->pTscObj);
+    tNameSetDbName(&name, tmq->pTscObj->acctId, dbName, strlen(dbName));     
+    tNameFromString(&name, topicName, T_NAME_TABLE);
+
+    char* topicFname = calloc(1, TSDB_TOPIC_FNAME_LEN);
+    if (topicFname == NULL) {
+
+    }
+    tNameExtractFullName(&name, topicFname);
+    tscDebug("subscribe topic: %s", topicFname);
+    taosArrayPush(tmq->clientTopics, &topicFname); 
+    /*SMqClientTopic topic = {*/
+      /*.*/
+    /*};*/
   }
   SCMSubscribeReq req;
   req.topicNum = taosArrayGetSize(tmq->clientTopics);
@@ -401,7 +417,7 @@ TAOS_RES* tmq_subscribe(tmq_t* tmq, tmq_list_t* topic_list) {
   }
 
   pRequest->body.requestMsg = (SDataBuf){ .pData = buf, .len = tlen };
-  pRequest->type = TDMT_MND_CREATE_TOPIC;
+  pRequest->type = TDMT_MND_SUBSCRIBE;
 
   SMsgSendInfo* body = buildMsgInfoImpl(pRequest);
   SEpSet epSet = getEpSet_s(&tmq->pTscObj->pAppInfo->mgmtEp);
@@ -534,7 +550,7 @@ TAOS_RES *taos_create_topic(TAOS* taos, const char* topicName, const char* sql,
 
   SCMCreateTopicReq req = {
     .name         = (char*) topicFname,
-    .igExists     = 0,
+    .igExists     = 1,
     .physicalPlan = (char*) pStr,
     .sql          = (char*) sql,
     .logicalPlan  = "no logic plan",
diff --git a/source/client/test/clientTests.cpp b/source/client/test/clientTests.cpp
index c57aedee2e..d62d7cb826 100644
--- a/source/client/test/clientTests.cpp
+++ b/source/client/test/clientTests.cpp
@@ -458,10 +458,9 @@ TEST(testCase, show_table_Test) {
   assert(pConn != NULL);
 
   TAOS_RES* pRes = taos_query(pConn, "show tables");
-  ASSERT_NE(taos_errno(pRes), 0);
-
   if (taos_errno(pRes) != 0) {
-    printf("expected failed to show tables, reason:%s\n", taos_errstr(pRes));
+    printf("failed to show tables, reason:%s\n", taos_errstr(pRes));
+    taos_free_result(pRes);
   }
 
   taos_free_result(pRes);
@@ -537,6 +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_FIELD* pFields = taos_fetch_fields(pRes);
   ASSERT_TRUE(pFields == nullptr);
@@ -570,6 +570,51 @@ TEST(testCase, insert_test) {
   taos_close(pConn);
 }
 
+#if 0
+TEST(testCase, tmq_subscribe_Test) {
+  TAOS* pConn = taos_connect("localhost", "root", "taosdata", NULL, 0);
+  assert(pConn != NULL);
+
+  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);
+
+  while (1) {
+    tmq_message_t* msg = tmq_consume_poll(tmq, 0);
+    printf("get msg\n");
+    if (msg == NULL) break;
+  }
+}
+
+TEST(testCase, tmq_consume_Test) {
+}
+
+TEST(testCase, tmq_commit_TEST) {
+}
+#endif
+
+//TEST(testCase, insert_test) {
+//  TAOS* pConn = taos_connect("localhost", "root", "taosdata", NULL, 0);
+//  ASSERT_NE(pConn, nullptr);
+//
+//  TAOS_RES* pRes = taos_query(pConn, "use abc1");
+//  taos_free_result(pRes);
+//
+//  pRes = taos_query(pConn, "insert into t_2 values(now, 1)");
+//  if (taos_errno(pRes) != 0) {
+//    printf("failed to create multiple tables, reason:%s\n", taos_errstr(pRes));
+//    taos_free_result(pRes);
+//    ASSERT_TRUE(false);
+//  }
+//
+//  taos_free_result(pRes);
+//  taos_close(pConn);
+//}
+
 TEST(testCase, projection_query_tables) {
   TAOS* pConn = taos_connect("localhost", "root", "taosdata", NULL, 0);
   ASSERT_NE(pConn, nullptr);
diff --git a/source/dnode/mgmt/impl/src/dndMgmt.c b/source/dnode/mgmt/impl/src/dndMgmt.c
index 507f9a2644..b127fb1d64 100644
--- a/source/dnode/mgmt/impl/src/dndMgmt.c
+++ b/source/dnode/mgmt/impl/src/dndMgmt.c
@@ -487,6 +487,8 @@ static void *dnodeThreadRoutine(void *param) {
   SDnodeMgmt *pMgmt = &pDnode->dmgmt;
   int32_t     ms = pDnode->cfg.statusInterval * 1000;
 
+  setThreadName("dnode-hb");
+
   while (true) {
     pthread_testcancel();
     taosMsleep(ms);
diff --git a/source/dnode/mgmt/impl/src/dndTransport.c b/source/dnode/mgmt/impl/src/dndTransport.c
index 4ccab751b3..1da13bc3d9 100644
--- a/source/dnode/mgmt/impl/src/dndTransport.c
+++ b/source/dnode/mgmt/impl/src/dndTransport.c
@@ -112,6 +112,9 @@ static void dndInitMsgFp(STransMgmt *pMgmt) {
   pMgmt->msgFp[TMSG_INDEX(TDMT_MND_CREATE_TOPIC)] = dndProcessMnodeWriteMsg;
   pMgmt->msgFp[TMSG_INDEX(TDMT_MND_ALTER_TOPIC)] = dndProcessMnodeWriteMsg;
   pMgmt->msgFp[TMSG_INDEX(TDMT_MND_DROP_TOPIC)] = dndProcessMnodeWriteMsg;
+  pMgmt->msgFp[TMSG_INDEX(TDMT_MND_SUBSCRIBE)] = dndProcessMnodeWriteMsg;
+  /*pMgmt->msgFp[TMSG_INDEX(TDMT_VND_SUBSCRIBE_RSP)] = dndProcessMnodeWriteMsg;*/
+  pMgmt->msgFp[TMSG_INDEX(TDMT_VND_MQ_SET_CONN_RSP)] = dndProcessMnodeWriteMsg;
 
   // Requests handled by VNODE
   pMgmt->msgFp[TMSG_INDEX(TDMT_VND_SUBMIT)] = dndProcessVnodeWriteMsg;
@@ -142,6 +145,8 @@ static void dndInitMsgFp(STransMgmt *pMgmt) {
   pMgmt->msgFp[TMSG_INDEX(TDMT_VND_DROP_TABLE)] = dndProcessVnodeWriteMsg;
   pMgmt->msgFp[TMSG_INDEX(TDMT_VND_SHOW_TABLES)] = dndProcessVnodeFetchMsg;
   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;
 }
 
 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 e1103e7bb4..02ce3a1591 100644
--- a/source/dnode/mnode/impl/inc/mndDef.h
+++ b/source/dnode/mnode/impl/inc/mndDef.h
@@ -363,8 +363,9 @@ typedef struct SMqConsumerEp {
   int64_t      consumerId;  // -1 for unassigned
   int64_t      lastConsumerHbTs;
   int64_t      lastVgHbTs;
-  int32_t      execLen;
-  SSubQueryMsg qExec;
+  uint32_t     qmsgLen;
+  char*        qmsg;
+  //SSubQueryMsg qExec;
 } SMqConsumerEp;
 
 static FORCE_INLINE int32_t tEncodeSMqConsumerEp(void** buf, SMqConsumerEp* pConsumerEp) {
@@ -373,7 +374,9 @@ 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 += tEncodeSSubQueryMsg(buf, &pConsumerEp->qExec);
+  //tlen += tEncodeSSubQueryMsg(buf, &pConsumerEp->qExec);
+  tlen += taosEncodeFixedU32(buf, pConsumerEp->qmsgLen);
+  tlen += taosEncodeBinary(buf, pConsumerEp->qmsg, pConsumerEp->qmsgLen);
   return tlen;
 }
 
@@ -382,8 +385,9 @@ 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 = tDecodeSSubQueryMsg(buf, &pConsumerEp->qExec);
-  pConsumerEp->execLen = sizeof(SSubQueryMsg) + pConsumerEp->qExec.contentLen;
+  //buf = tDecodeSSubQueryMsg(buf, &pConsumerEp->qExec);
+  buf = taosDecodeFixedU32(buf, &pConsumerEp->qmsgLen);
+  buf = taosDecodeBinary(buf, (void**)&pConsumerEp->qmsg, pConsumerEp->qmsgLen);
   return buf;
 }
 
@@ -402,11 +406,12 @@ typedef struct SMqSubscribeObj {
 
 static FORCE_INLINE SMqSubscribeObj* tNewSubscribeObj() {
   SMqSubscribeObj* pSub = malloc(sizeof(SMqSubscribeObj));
-  pSub->key[0] = 0;
-  pSub->epoch = 0;
   if (pSub == NULL) {
     return NULL;
   }
+  pSub->key[0] = 0;
+  pSub->epoch = 0;
+
   pSub->availConsumer = taosArrayInit(0, sizeof(int64_t));
   if (pSub->availConsumer == NULL) {
     free(pSub);
@@ -433,7 +438,7 @@ static FORCE_INLINE SMqSubscribeObj* tNewSubscribeObj() {
     free(pSub);
     return NULL;
   }
-  return NULL;
+  return pSub;
 }
 
 static FORCE_INLINE int32_t tEncodeSubscribeObj(void** buf, const SMqSubscribeObj* pSub) {
diff --git a/source/dnode/mnode/impl/src/mndConsumer.c b/source/dnode/mnode/impl/src/mndConsumer.c
index 5cdd8e77bd..7591caebc5 100644
--- a/source/dnode/mnode/impl/src/mndConsumer.c
+++ b/source/dnode/mnode/impl/src/mndConsumer.c
@@ -56,7 +56,9 @@ void mndCleanupConsumer(SMnode *pMnode) {}
 SSdbRaw *mndConsumerActionEncode(SMqConsumerObj *pConsumer) {
   terrno = TSDB_CODE_OUT_OF_MEMORY;
   int32_t tlen = tEncodeSMqConsumerObj(NULL, pConsumer);
-  SSdbRaw *pRaw = sdbAllocRaw(SDB_CONSUMER, MND_CONSUMER_VER_NUMBER, tlen);
+  int32_t size = sizeof(int32_t) + tlen + MND_CONSUMER_RESERVE_SIZE;
+
+  SSdbRaw *pRaw = sdbAllocRaw(SDB_CONSUMER, MND_CONSUMER_VER_NUMBER, size);
   if (pRaw == NULL) goto CM_ENCODE_OVER;
 
   void* buf = malloc(tlen);
@@ -68,34 +70,6 @@ SSdbRaw *mndConsumerActionEncode(SMqConsumerObj *pConsumer) {
   int32_t dataPos = 0;
   SDB_SET_INT32(pRaw, dataPos, tlen, CM_ENCODE_OVER);
   SDB_SET_BINARY(pRaw, dataPos, buf, tlen, CM_ENCODE_OVER);
-
-#if 0
-  int32_t topicNum = taosArrayGetSize(pConsumer->topics);
-  SDB_SET_INT64(pRaw, dataPos, pConsumer->consumerId, CM_ENCODE_OVER);
-  int32_t len = strlen(pConsumer->cgroup);
-  SDB_SET_INT32(pRaw, dataPos, len, CM_ENCODE_OVER);
-  SDB_SET_BINARY(pRaw, dataPos, pConsumer->cgroup, len, CM_ENCODE_OVER);
-  SDB_SET_INT32(pRaw, dataPos, topicNum, CM_ENCODE_OVER);
-  for (int i = 0; i < topicNum; i++) {
-    int32_t           len;
-    SMqConsumerTopic *pConsumerTopic = taosArrayGet(pConsumer->topics, i);
-    len = strlen(pConsumerTopic->name);
-    SDB_SET_INT32(pRaw, dataPos, len, CM_ENCODE_OVER);
-    SDB_SET_BINARY(pRaw, dataPos, pConsumerTopic->name, len, CM_ENCODE_OVER);
-    int vgSize;
-    if (pConsumerTopic->vgroups == NULL) {
-      vgSize = 0;
-    } else {
-      vgSize = listNEles(pConsumerTopic->vgroups);
-    }
-    SDB_SET_INT32(pRaw, dataPos, vgSize, CM_ENCODE_OVER);
-    for (int j = 0; j < vgSize; j++) {
-      // SList* head;
-      /*SDB_SET_INT64(pRaw, dataPos, 0[> change to list item <]);*/
-    }
-  }
-#endif
-
   SDB_SET_RESERVE(pRaw, dataPos, MND_CONSUMER_RESERVE_SIZE, CM_ENCODE_OVER);
   SDB_SET_DATALEN(pRaw, dataPos, CM_ENCODE_OVER);
 
@@ -116,53 +90,35 @@ SSdbRow *mndConsumerActionDecode(SSdbRaw *pRaw) {
   terrno = TSDB_CODE_OUT_OF_MEMORY;
 
   int8_t sver = 0;
-  if (sdbGetRawSoftVer(pRaw, &sver) != 0) goto CONSUME_DECODE_OVER;
+  if (sdbGetRawSoftVer(pRaw, &sver) != 0) goto CM_DECODE_OVER;
 
   if (sver != MND_CONSUMER_VER_NUMBER) {
     terrno = TSDB_CODE_SDB_INVALID_DATA_VER;
-    goto CONSUME_DECODE_OVER;
+    goto CM_DECODE_OVER;
   }
 
   SSdbRow *pRow = sdbAllocRow(sizeof(SMqConsumerObj));
-  if (pRow == NULL) goto CONSUME_DECODE_OVER;
+  if (pRow == NULL) goto CM_DECODE_OVER;
 
   SMqConsumerObj *pConsumer = sdbGetRowObj(pRow);
-  if (pConsumer == NULL) goto CONSUME_DECODE_OVER;
+  if (pConsumer == NULL) goto CM_DECODE_OVER;
 
   int32_t dataPos = 0;
   int32_t len;
-  SDB_GET_INT32(pRaw, dataPos, &len, CONSUME_DECODE_OVER);
+  SDB_GET_INT32(pRaw, dataPos, &len, CM_DECODE_OVER);
   void* buf = malloc(len);
-  if (buf == NULL) goto CONSUME_DECODE_OVER;
-  
-  SDB_GET_BINARY(pRaw, dataPos, buf, len, CONSUME_DECODE_OVER);
+  if (buf == NULL) goto CM_DECODE_OVER;
+  SDB_GET_BINARY(pRaw, dataPos, buf, len, CM_DECODE_OVER);
+  SDB_GET_RESERVE(pRaw, dataPos, MND_CONSUMER_RESERVE_SIZE, CM_DECODE_OVER);
 
-  tDecodeSMqConsumerObj(buf, pConsumer);
-
-  SDB_GET_RESERVE(pRaw, dataPos, MND_CONSUMER_RESERVE_SIZE, CONSUME_DECODE_OVER);
+  if (tDecodeSMqConsumerObj(buf, pConsumer) == NULL) {
+    goto CM_DECODE_OVER;
+  }
 
   terrno = TSDB_CODE_SUCCESS;
 
-#if 0
-  SDB_GET_INT32(pRaw, dataPos, &topicNum, CONSUME_DECODE_OVER);
-  for (int i = 0; i < topicNum; i++) {
-    int32_t           topicLen;
-    SMqConsumerTopic *pConsumerTopic = malloc(sizeof(SMqConsumerTopic));
-    if (pConsumerTopic == NULL) {
-      terrno = TSDB_CODE_OUT_OF_MEMORY;
-      // TODO
-      return NULL;
-    }
-    /*pConsumerTopic->vgroups = taosArrayInit(topicNum, sizeof(SMqConsumerTopic));*/
-    SDB_GET_INT32(pRaw, dataPos, &topicLen, CONSUME_DECODE_OVER);
-    SDB_GET_BINARY(pRaw, dataPos, pConsumerTopic->name, topicLen, CONSUME_DECODE_OVER);
-    int32_t vgSize;
-    SDB_GET_INT32(pRaw, dataPos, &vgSize, CONSUME_DECODE_OVER);
-  }
-#endif
-
-CONSUME_DECODE_OVER:
-  if (terrno != 0) {
+CM_DECODE_OVER:
+  if (terrno != TSDB_CODE_SUCCESS) {
     mError("consumer:%ld, failed to decode from raw:%p since %s", pConsumer->consumerId, pRaw, terrstr());
     tfree(pRow);
     return NULL;
diff --git a/source/dnode/mnode/impl/src/mndSubscribe.c b/source/dnode/mnode/impl/src/mndSubscribe.c
index 9a573cbe2c..78e9a7c17c 100644
--- a/source/dnode/mnode/impl/src/mndSubscribe.c
+++ b/source/dnode/mnode/impl/src/mndSubscribe.c
@@ -55,7 +55,7 @@ int32_t mndInitSubscribe(SMnode *pMnode) {
                      .deleteFp = (SdbDeleteFp)mndSubActionDelete};
 
   mndSetMsgHandle(pMnode, TDMT_MND_SUBSCRIBE, mndProcessSubscribeReq);
-  mndSetMsgHandle(pMnode, TDMT_VND_SUBSCRIBE_RSP, mndProcessSubscribeInternalRsp);
+  mndSetMsgHandle(pMnode, TDMT_VND_MQ_SET_CONN_RSP, mndProcessSubscribeInternalRsp);
   mndSetMsgHandle(pMnode, TDMT_MND_MQ_TIMER, mndProcessMqTimerMsg);
   return sdbSetTable(pMnode->pSdb, table);
 }
@@ -96,25 +96,27 @@ static int32_t mndProcessMqTimerMsg(SMnodeMsg *pMsg) {
         pSub->nextConsumerIdx = (pSub->nextConsumerIdx + 1) % taosArrayGetSize(pSub->availConsumer);
 
         // build msg
-        SMqSetCVgReq req = {
-            .vgId = pCEp->vgId,
-            .oldConsumerId = -1,
-            .newConsumerId = consumerId,
-        };
-        strcpy(req.cgroup, cgroup);
-        strcpy(req.topicName, topic);
-        strcpy(req.sql, pTopic->sql);
-        strcpy(req.logicalPlan, pTopic->logicalPlan);
-        strcpy(req.physicalPlan, pTopic->physicalPlan);
-        memcpy(&req.msg, &pCEp->qExec, pCEp->execLen);
-        int32_t tlen = tEncodeSMqSetCVgReq(NULL, &req);
+
+        SMqSetCVgReq* pReq = malloc(sizeof(SMqSetCVgReq) + pCEp->qmsgLen);
+        if (pReq == NULL) {
+          terrno = TSDB_CODE_OUT_OF_MEMORY;
+          return -1;
+        }
+        strcpy(pReq->cgroup, cgroup);
+        strcpy(pReq->topicName, topic);
+        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);
+        int32_t tlen = tEncodeSMqSetCVgReq(NULL, pReq);
         void   *reqStr = malloc(tlen);
         if (reqStr == NULL) {
           terrno = TSDB_CODE_OUT_OF_MEMORY;
           return -1;
         }
         void *abuf = reqStr;
-        tEncodeSMqSetCVgReq(abuf, &req);
+        tEncodeSMqSetCVgReq(&abuf, pReq);
 
         // persist msg
         STransAction action = {0};
@@ -128,6 +130,7 @@ static int32_t mndProcessMqTimerMsg(SMnodeMsg *pMsg) {
         SSdbRaw *pRaw = mndSubActionEncode(pSub);
         mndTransAppendRedolog(pTrans, pRaw);
 
+        free(pReq);
         tfree(topic);
         tfree(cgroup);
       }
@@ -146,6 +149,14 @@ static int mndInitUnassignedVg(SMnode *pMnode, SMqTopicObj *pTopic, SArray *unas
   //convert phyplan to dag
   SQueryDag *pDag = qStringToDag(pTopic->physicalPlan);
   SArray *pArray;
+  SArray* inner = taosArrayGet(pDag->pSubplans, 0);
+  SSubplan *plan = taosArrayGetP(inner, 0);
+  plan->execNode.inUse = 0;
+  strcpy(plan->execNode.epAddr[0].fqdn, "localhost");
+  plan->execNode.epAddr[0].port = 6030;
+  plan->execNode.nodeId = 2;
+  plan->execNode.numOfEps = 1;
+
   if (schedulerConvertDagToTaskList(pDag, &pArray) < 0) {
     return -1;
   }
@@ -157,11 +168,18 @@ static int mndInitUnassignedVg(SMnode *pMnode, SMqTopicObj *pTopic, SArray *unas
     CEp.lastConsumerHbTs = CEp.lastVgHbTs = -1;
     STaskInfo* pTaskInfo = taosArrayGet(pArray, i);
     tConvertQueryAddrToEpSet(&CEp.epSet, &pTaskInfo->addr);
+    /*mDebug("subscribe convert ep %d %s %s %s %s %s\n", CEp.epSet.numOfEps, CEp.epSet.fqdn[0], CEp.epSet.fqdn[1], CEp.epSet.fqdn[2], CEp.epSet.fqdn[3], CEp.epSet.fqdn[4]);*/
     CEp.vgId = pTaskInfo->addr.nodeId;
+    CEp.qmsgLen = pTaskInfo->msg->contentLen;
+    CEp.qmsg = malloc(CEp.qmsgLen);
+    if (CEp.qmsg == NULL) {
+      return -1;
+    }
+    memcpy(CEp.qmsg, pTaskInfo->msg->msg, pTaskInfo->msg->contentLen);
     taosArrayPush(unassignedVg, &CEp);
   }
 
-  qDestroyQueryDag(pDag);
+  /*qDestroyQueryDag(pDag);*/
   return 0;
 }
 
@@ -178,27 +196,33 @@ static int mndBuildMqSetConsumerVgReq(SMnode *pMnode, STrans *pTrans, SMqConsume
     };
     strcpy(req.cgroup, pConsumer->cgroup);
     strcpy(req.topicName, pTopic->name);
-    strcpy(req.sql, pTopic->sql);
-    strcpy(req.logicalPlan, pTopic->logicalPlan);
-    strcpy(req.physicalPlan, pTopic->physicalPlan);
+    req.sql = pTopic->sql;
+    req.logicalPlan = pTopic->logicalPlan;
+    req.physicalPlan = pTopic->physicalPlan;
     int32_t tlen = tEncodeSMqSetCVgReq(NULL, &req);
-    void   *reqStr = malloc(tlen);
-    if (reqStr == NULL) {
+    void   *buf = malloc(sizeof(SMsgHead) + tlen);
+    if (buf == NULL) {
       terrno = TSDB_CODE_OUT_OF_MEMORY;
       return -1;
     }
-    void *abuf = reqStr;
+
+    SMsgHead* pMsgHead = (SMsgHead*)buf;
+
+    pMsgHead->contLen = htonl(sizeof(SMsgHead) + tlen);
+    pMsgHead->vgId = htonl(vgId);
+
+    void* abuf = POINTER_SHIFT(buf, sizeof(SMsgHead));
     tEncodeSMqSetCVgReq(&abuf, &req);
 
     STransAction action = {0};
     action.epSet = mndGetVgroupEpset(pMnode, pVgObj);
-    action.pCont = reqStr;
+    action.pCont = buf;
     action.contLen = tlen;
     action.msgType = TDMT_VND_MQ_SET_CONN;
 
     mndReleaseVgroup(pMnode, pVgObj);
     if (mndTransAppendRedoAction(pTrans, &action) != 0) {
-      free(reqStr);
+      free(buf);
       return -1;
     }
   }
@@ -208,19 +232,18 @@ static int mndBuildMqSetConsumerVgReq(SMnode *pMnode, STrans *pTrans, SMqConsume
 void mndCleanupSubscribe(SMnode *pMnode) {}
 
 static SSdbRaw *mndSubActionEncode(SMqSubscribeObj *pSub) {
+  terrno = TSDB_CODE_OUT_OF_MEMORY;
   int32_t tlen = tEncodeSubscribeObj(NULL, pSub);
-  int32_t size = tlen + MND_SUBSCRIBE_RESERVE_SIZE;
+  int32_t size = sizeof(int32_t) + tlen + MND_SUBSCRIBE_RESERVE_SIZE;
 
   SSdbRaw *pRaw = sdbAllocRaw(SDB_SUBSCRIBE, MND_SUBSCRIBE_VER_NUMBER, size);
   if (pRaw == NULL) goto SUB_ENCODE_OVER;
 
   void *buf = malloc(tlen);
-  if (buf == NULL) {
-    goto SUB_ENCODE_OVER;
-  }
-  void *abuf = buf;
+  if (buf == NULL) goto SUB_ENCODE_OVER;
 
-  tEncodeSubscribeObj(&buf, pSub);
+  void *abuf = buf;
+  tEncodeSubscribeObj(&abuf, pSub);
 
   int32_t dataPos = 0;
   SDB_SET_INT32(pRaw, dataPos, tlen, SUB_ENCODE_OVER);
@@ -228,6 +251,8 @@ static SSdbRaw *mndSubActionEncode(SMqSubscribeObj *pSub) {
   SDB_SET_RESERVE(pRaw, dataPos, MND_SUBSCRIBE_RESERVE_SIZE, SUB_ENCODE_OVER);
   SDB_SET_DATALEN(pRaw, dataPos, SUB_ENCODE_OVER);
 
+  terrno = TSDB_CODE_SUCCESS;
+
 SUB_ENCODE_OVER:
   if (terrno != 0) {
     mError("subscribe:%s, failed to encode to raw:%p since %s", pSub->key, pRaw, terrstr());
@@ -259,9 +284,9 @@ static SSdbRow *mndSubActionDecode(SSdbRaw *pRaw) {
 
   int32_t dataPos = 0;
   int32_t tlen;
+  SDB_GET_INT32(pRaw, dataPos, &tlen, SUB_DECODE_OVER);
   void   *buf = malloc(tlen + 1);
   if (buf == NULL) goto SUB_DECODE_OVER;
-  SDB_GET_INT32(pRaw, dataPos, &tlen, SUB_DECODE_OVER);
   SDB_GET_BINARY(pRaw, dataPos, buf, tlen, SUB_DECODE_OVER);
   SDB_GET_RESERVE(pRaw, dataPos, MND_SUBSCRIBE_RESERVE_SIZE, SUB_DECODE_OVER);
 
@@ -269,8 +294,10 @@ static SSdbRow *mndSubActionDecode(SSdbRaw *pRaw) {
     goto SUB_DECODE_OVER;
   }
 
+  terrno = TSDB_CODE_SUCCESS;
+
 SUB_DECODE_OVER:
-  if (terrno != 0) {
+  if (terrno != TSDB_CODE_SUCCESS) {
     mError("subscribe:%s, failed to decode from raw:%p since %s", pSub->key, pRaw, terrstr());
     // TODO free subscribeobj
     tfree(pRow);
@@ -379,10 +406,10 @@ static int32_t mndProcessSubscribeReq(SMnodeMsg *pMsg) {
       oldTopicName = ((SMqConsumerTopic *)taosArrayGet(oldSub, j))->name;
       j++;
     } else if (j >= oldTopicNum) {
-      newTopicName = taosArrayGet(newSub, i);
+      newTopicName = taosArrayGetP(newSub, i);
       i++;
     } else {
-      newTopicName = taosArrayGet(newSub, i);
+      newTopicName = taosArrayGetP(newSub, i);
       oldTopicName = ((SMqConsumerTopic *)taosArrayGet(oldSub, j))->name;
 
       int comp = compareLenPrefixedStr(newTopicName, oldTopicName);
@@ -466,6 +493,8 @@ static int32_t mndProcessSubscribeReq(SMnodeMsg *pMsg) {
           terrno = TSDB_CODE_OUT_OF_MEMORY;
           return -1;
         }
+        char* key = mndMakeSubscribeKey(consumerGroup, newTopicName);
+        strcpy(pSub->key, key);
         // set unassigned vg
         mndInitUnassignedVg(pMnode, pTopic, pSub->unassignedVg);
         //TODO: disable alter
@@ -486,7 +515,7 @@ static int32_t mndProcessSubscribeReq(SMnodeMsg *pMsg) {
       }
 
       SSdbRaw *pRaw = mndSubActionEncode(pSub);
-      /*sdbSetRawStatus(pRaw, SDB_STATUS_READY);*/
+      sdbSetRawStatus(pRaw, SDB_STATUS_READY);
       mndTransAppendRedolog(pTrans, pRaw);
 #if 0
       SMqCGroup *pGroup = taosHashGet(pTopic->cgroups, consumerGroup, cgroupLen);
@@ -519,8 +548,8 @@ static int32_t mndProcessSubscribeReq(SMnodeMsg *pMsg) {
       mndTransAppendRedolog(pTrans, pTopicRaw);
 
 #endif
-      mndReleaseTopic(pMnode, pTopic);
-      mndReleaseSubscribe(pMnode, pSub);
+      /*mndReleaseTopic(pMnode, pTopic);*/
+      /*mndReleaseSubscribe(pMnode, pSub);*/
     }
   }
   // part3. persist consumerObj
diff --git a/source/dnode/mnode/impl/src/mndTopic.c b/source/dnode/mnode/impl/src/mndTopic.c
index ac66e7d88b..fa043cf7a0 100644
--- a/source/dnode/mnode/impl/src/mndTopic.c
+++ b/source/dnode/mnode/impl/src/mndTopic.c
@@ -60,7 +60,9 @@ void mndCleanupTopic(SMnode *pMnode) {}
 SSdbRaw *mndTopicActionEncode(SMqTopicObj *pTopic) {
   terrno = TSDB_CODE_OUT_OF_MEMORY;
 
-  int32_t  size = sizeof(SMqTopicObj) + MND_TOPIC_RESERVE_SIZE;
+  int32_t logicalPlanLen = strlen(pTopic->logicalPlan) + 1;
+  int32_t physicalPlanLen = strlen(pTopic->physicalPlan) + 1;
+  int32_t  size = sizeof(SMqTopicObj) + logicalPlanLen + physicalPlanLen + pTopic->sqlLen + MND_TOPIC_RESERVE_SIZE;
   SSdbRaw *pRaw = sdbAllocRaw(SDB_TOPIC, MND_TOPIC_VER_NUMBER, size);
   if (pRaw == NULL) goto TOPIC_ENCODE_OVER;
 
@@ -74,12 +76,10 @@ SSdbRaw *mndTopicActionEncode(SMqTopicObj *pTopic) {
   SDB_SET_INT32(pRaw, dataPos, pTopic->version, TOPIC_ENCODE_OVER);
   SDB_SET_INT32(pRaw, dataPos, pTopic->sqlLen, TOPIC_ENCODE_OVER);
   SDB_SET_BINARY(pRaw, dataPos, pTopic->sql, pTopic->sqlLen, TOPIC_ENCODE_OVER);
-  int32_t logicalPlanLen = strlen(pTopic->logicalPlan) + 1;
-  SDB_SET_INT32(pRaw, dataPos, strlen(pTopic->logicalPlan)+1, TOPIC_ENCODE_OVER);
+  SDB_SET_INT32(pRaw, dataPos, logicalPlanLen, TOPIC_ENCODE_OVER);
   SDB_SET_BINARY(pRaw, dataPos, pTopic->logicalPlan, logicalPlanLen, TOPIC_ENCODE_OVER);
 
-  int32_t physicalPlanLen = strlen(pTopic->physicalPlan) + 1;
-  SDB_SET_INT32(pRaw, dataPos, strlen(pTopic->physicalPlan)+1, TOPIC_ENCODE_OVER);
+  SDB_SET_INT32(pRaw, dataPos, physicalPlanLen, TOPIC_ENCODE_OVER);
   SDB_SET_BINARY(pRaw, dataPos, pTopic->physicalPlan, physicalPlanLen, TOPIC_ENCODE_OVER);
 
   SDB_SET_RESERVE(pRaw, dataPos, MND_TOPIC_RESERVE_SIZE, TOPIC_ENCODE_OVER);
@@ -135,7 +135,7 @@ SSdbRow *mndTopicActionDecode(SSdbRaw *pRaw) {
     terrno = TSDB_CODE_OUT_OF_MEMORY;
     goto TOPIC_DECODE_OVER;
   }
-  SDB_GET_BINARY(pRaw, dataPos, pTopic->logicalPlan, len+1, TOPIC_DECODE_OVER);
+  SDB_GET_BINARY(pRaw, dataPos, pTopic->logicalPlan, len, TOPIC_DECODE_OVER);
 
   SDB_GET_INT32(pRaw, dataPos, &len, TOPIC_DECODE_OVER);
   pTopic->physicalPlan = calloc(len + 1, sizeof(char));
@@ -144,7 +144,7 @@ SSdbRow *mndTopicActionDecode(SSdbRaw *pRaw) {
     terrno = TSDB_CODE_OUT_OF_MEMORY;
     goto TOPIC_DECODE_OVER;
   }
-  SDB_GET_BINARY(pRaw, dataPos, pTopic->physicalPlan, len+1, TOPIC_DECODE_OVER);
+  SDB_GET_BINARY(pRaw, dataPos, pTopic->physicalPlan, len, TOPIC_DECODE_OVER);
 
   SDB_GET_RESERVE(pRaw, dataPos, MND_TOPIC_RESERVE_SIZE, TOPIC_DECODE_OVER);
 
@@ -231,6 +231,7 @@ static int32_t mndCheckCreateTopicMsg(SCMCreateTopicReq *creattopReq) {
 }
 
 static int32_t mndCreateTopic(SMnode *pMnode, SMnodeMsg *pMsg, SCMCreateTopicReq *pCreate, SDbObj *pDb) {
+  mDebug("topic:%s to create", pCreate->name);
   SMqTopicObj topicObj = {0};
   tstrncpy(topicObj.name, pCreate->name, TSDB_TOPIC_FNAME_LEN);
   tstrncpy(topicObj.db, pDb->name, TSDB_DB_FNAME_LEN);
@@ -273,7 +274,7 @@ static int32_t mndProcessCreateTopicMsg(SMnodeMsg *pMsg) {
       return 0;
     } else {
       terrno = TSDB_CODE_MND_TOPIC_ALREADY_EXIST;
-      mError("db:%s, failed to create since %s", createTopicReq.name, terrstr());
+      mError("topic:%s, failed to create since already exists", createTopicReq.name);
       return -1;
     }
   }
diff --git a/source/dnode/vnode/src/tq/tq.c b/source/dnode/vnode/src/tq/tq.c
index 2b5a995988..cfe2d6fd69 100644
--- a/source/dnode/vnode/src/tq/tq.c
+++ b/source/dnode/vnode/src/tq/tq.c
@@ -799,9 +799,9 @@ int32_t tqProcessSetConnReq(STQ* pTq, char* msg) {
     return -1;
   }
   strcpy(pTopic->topicName, req.topicName);
-  strcpy(pTopic->sql, req.sql);
-  strcpy(pTopic->logicalPlan, req.logicalPlan);
-  strcpy(pTopic->physicalPlan, req.physicalPlan);
+  pTopic->sql = strdup(req.sql);
+  pTopic->logicalPlan = strdup(req.logicalPlan);
+  pTopic->physicalPlan = strdup(req.physicalPlan);
 
   pTopic->buffer.firstOffset = -1;
   pTopic->buffer.lastOffset = -1;
@@ -811,9 +811,10 @@ int32_t tqProcessSetConnReq(STQ* pTq, char* msg) {
   for (int i = 0; i < TQ_BUFFER_SIZE; i++) {
     pTopic->buffer.output[i].status = 0;
     STqReadHandle* pReadHandle = tqInitSubmitMsgScanner(pTq->pMeta);
-    pTopic->buffer.output[i].task = qCreateStreamExecTaskInfo(&req.msg, pReadHandle);
+    pTopic->buffer.output[i].task = qCreateStreamExecTaskInfo(&req.qmsg, pReadHandle);
   }
   taosArrayPush(pConsumer->topics, pTopic);
+  terrno = TSDB_CODE_SUCCESS;
   return 0;
 }
 
@@ -826,7 +827,7 @@ STqReadHandle* tqInitSubmitMsgScanner(SMeta* pMeta) {
   pReadHandle->pMsg = NULL;
   pReadHandle->ver = -1;
   pReadHandle->pColIdList = NULL;
-  return NULL;
+  return pReadHandle;
 }
 
 void tqReadHandleSetMsg(STqReadHandle* pReadHandle, SSubmitMsg* pMsg, int64_t ver) {
diff --git a/source/dnode/vnode/src/vnd/vnodeMgr.c b/source/dnode/vnode/src/vnd/vnodeMgr.c
index 6829d778f0..d762844120 100644
--- a/source/dnode/vnode/src/vnd/vnodeMgr.c
+++ b/source/dnode/vnode/src/vnd/vnodeMgr.c
@@ -98,6 +98,8 @@ int32_t vnodePutReqToVQueryQ(SVnode* pVnode, struct SRpcMsg* pReq) {
 
 /* ------------------------ STATIC METHODS ------------------------ */
 static void* loop(void* arg) {
+  setThreadName("vnode-commit");
+
   SVnodeTask* pTask;
   for (;;) {
     pthread_mutex_lock(&(vnodeMgr.mutex));
diff --git a/source/dnode/vnode/src/vnd/vnodeWrite.c b/source/dnode/vnode/src/vnd/vnodeWrite.c
index 169dc32c1c..326d99ddbb 100644
--- a/source/dnode/vnode/src/vnd/vnodeWrite.c
+++ b/source/dnode/vnode/src/vnd/vnodeWrite.c
@@ -115,7 +115,8 @@ int vnodeApplyWMsg(SVnode *pVnode, SRpcMsg *pMsg, SRpcMsg **pRsp) {
       }
       break;
     case TDMT_VND_MQ_SET_CONN: {
-      if (tqProcessSetConnReq(pVnode->pTq, ptr) < 0) {
+      if (tqProcessSetConnReq(pVnode->pTq, POINTER_SHIFT(ptr, sizeof(SMsgHead))) < 0) {
+        // TODO: handle error
       }
     } break;
     default:
diff --git a/source/libs/executor/inc/executorimpl.h b/source/libs/executor/inc/executorimpl.h
index ebf3d83a1a..b3f5370c0f 100644
--- a/source/libs/executor/inc/executorimpl.h
+++ b/source/libs/executor/inc/executorimpl.h
@@ -250,9 +250,8 @@ typedef struct SExecTaskInfo {
   STaskCostInfo   cost;
   int64_t         owner;       // if it is in execution
   int32_t         code;
-
+  uint64_t        totalRows;   // total number of rows
   STableGroupInfo tableqinfoGroupInfo;  // this is a group array list, including SArray<STableQueryInfo*> structure
-  pthread_mutex_t lock;        // used to synchronize the rsp/query threads
   char           *sql;         // query sql string
   jmp_buf         env;         //
   struct SOperatorInfo  *pRoot;
@@ -622,8 +621,6 @@ int32_t createIndirectQueryFuncExprFromMsg(SQueryTableReq *pQueryMsg, int32_t nu
 int32_t createQueryFilter(char *data, uint16_t len, SFilterInfo** pFilters);
 
 SGroupbyExpr *createGroupbyExprFromMsg(SQueryTableReq *pQueryMsg, SColIndex *pColIndex, int32_t *code);
-SQInfo *createQInfoImpl(SQueryTableReq *pQueryMsg, SGroupbyExpr *pGroupbyExpr, SExprInfo *pExprs,
-                        SExprInfo *pSecExprs, STableGroupInfo *pTableGroupInfo, SColumnInfo* pTagCols, SFilterInfo* pFilters, int32_t vgId, char* sql, uint64_t qId, struct SUdfInfo* pUdfInfo);
 
 int32_t initQInfo(STsBufInfo* pTsBufInfo, void* tsdb, void* sourceOptr, SQInfo* pQInfo, STaskParam* param, char* start,
                   int32_t prevResultLen, void* merger);
@@ -645,20 +642,18 @@ void setQueryStatus(STaskRuntimeEnv *pRuntimeEnv, int8_t status);
 bool onlyQueryTags(STaskAttr* pQueryAttr);
 //void destroyUdfInfo(struct SUdfInfo* pUdfInfo);
 
-bool isValidQInfo(void *param);
-
 int32_t doDumpQueryResult(SQInfo *pQInfo, char *data, int8_t compressed, int32_t *compLen);
 
 size_t getResultSize(SQInfo *pQInfo, int64_t *numOfRows);
-void setQueryKilled(SQInfo *pQInfo);
+void setTaskKilled(SExecTaskInfo *pTaskInfo);
 
 void publishOperatorProfEvent(SOperatorInfo* operatorInfo, EQueryProfEventType eventType);
 void publishQueryAbortEvent(SExecTaskInfo * pTaskInfo, int32_t code);
 
 void calculateOperatorProfResults(SQInfo* pQInfo);
-void queryCostStatis(SQInfo *pQInfo);
+void queryCostStatis(SExecTaskInfo *pTaskInfo);
 
-void doDestroyTask(SQInfo *pQInfo);
+void doDestroyTask(SExecTaskInfo *pTaskInfo);
 void freeQueryAttr(STaskAttr *pQuery);
 
 int32_t getMaximumIdleDurationSec();
diff --git a/source/libs/executor/src/dataDispatcher.c b/source/libs/executor/src/dataDispatcher.c
index f9e61f91de..97a0557748 100644
--- a/source/libs/executor/src/dataDispatcher.c
+++ b/source/libs/executor/src/dataDispatcher.c
@@ -121,11 +121,19 @@ static void toDataCacheEntry(const SDataDispatchHandle* pHandle, const SInputDat
 }
 
 static bool allocBuf(SDataDispatchHandle* pDispatcher, const SInputData* pInput, SDataDispatchBuf* pBuf) {
-  if (taosQueueSize(pDispatcher->pDataBlocks) >= pDispatcher->pManager->cfg.maxDataBlockNumPerQuery) {
+  uint32_t capacity = pDispatcher->pManager->cfg.maxDataBlockNumPerQuery;
+  if (taosQueueSize(pDispatcher->pDataBlocks) > capacity) {
+    qError("SinkNode queue is full, no capacity, max:%d, current:%d, no capacity", capacity,
+           taosQueueSize(pDispatcher->pDataBlocks));
     return false;
   }
+
   pBuf->allocSize = DATA_META_LENGTH(pInput->pTableRetrieveTsMap) + pDispatcher->schema.resultRowSize * pInput->pData->info.rows;
   pBuf->pData = malloc(pBuf->allocSize);
+  if (pBuf->pData == NULL) {
+    qError("SinkNode failed to malloc memory, size:%d, code:%d", pBuf->allocSize, TAOS_SYSTEM_ERROR(errno));
+  }
+
   return NULL != pBuf->pData;
 }
 
diff --git a/source/libs/executor/src/executor.c b/source/libs/executor/src/executor.c
index 2f1f40813c..b7be85dc34 100644
--- a/source/libs/executor/src/executor.c
+++ b/source/libs/executor/src/executor.c
@@ -60,8 +60,8 @@ int32_t qSetStreamInput(qTaskInfo_t tinfo, void* input) {
   return code;
 }
 
-qTaskInfo_t qCreateStreamExecTaskInfo(SSubQueryMsg* pMsg, void* streamReadHandle) {
-  if (pMsg == NULL || streamReadHandle == NULL) {
+qTaskInfo_t qCreateStreamExecTaskInfo(void* msg, void* streamReadHandle) {
+  if (msg == NULL || streamReadHandle == NULL) {
     return NULL;
   }
 
@@ -74,7 +74,7 @@ qTaskInfo_t qCreateStreamExecTaskInfo(SSubQueryMsg* pMsg, void* streamReadHandle
 #endif
 
   struct SSubplan* plan = NULL;
-  int32_t          code = qStringToSubplan(pMsg->msg, &plan);
+  int32_t          code = qStringToSubplan(msg, &plan);
   if (code != TSDB_CODE_SUCCESS) {
     terrno = code;
     return NULL;
diff --git a/source/libs/executor/src/executorMain.c b/source/libs/executor/src/executorMain.c
index e5d56aca15..b60943d284 100644
--- a/source/libs/executor/src/executorMain.c
+++ b/source/libs/executor/src/executorMain.c
@@ -149,7 +149,7 @@ int32_t qExecTask(qTaskInfo_t tinfo, SSDataBlock** pRes, uint64_t *useconds) {
 
   int64_t curOwner = 0;
   if ((curOwner = atomic_val_compare_exchange_64(&pTaskInfo->owner, 0, threadId)) != 0) {
-    qError("QInfo:0x%" PRIx64 "-%p qhandle is now executed by thread:%p", GET_TASKID(pTaskInfo), pTaskInfo,
+    qError("QID:0x%" PRIx64 "-%p qhandle is now executed by thread:%p", GET_TASKID(pTaskInfo), pTaskInfo,
            (void*)curOwner);
     pTaskInfo->code = TSDB_CODE_QRY_IN_EXEC;
     return pTaskInfo->code;
@@ -160,7 +160,7 @@ int32_t qExecTask(qTaskInfo_t tinfo, SSDataBlock** pRes, uint64_t *useconds) {
   }
 
   if (isTaskKilled(pTaskInfo)) {
-    qDebug("QInfo:0x%" PRIx64 " it is already killed, abort", GET_TASKID(pTaskInfo));
+    qDebug("QID:0x%" PRIx64 " it is already killed, abort", GET_TASKID(pTaskInfo));
     return TSDB_CODE_SUCCESS;
   }
 
@@ -169,12 +169,12 @@ int32_t qExecTask(qTaskInfo_t tinfo, SSDataBlock** pRes, uint64_t *useconds) {
   if (ret != TSDB_CODE_SUCCESS) {
     publishQueryAbortEvent(pTaskInfo, ret);
     pTaskInfo->code = ret;
-    qDebug("QInfo:0x%" PRIx64 " query abort due to error/cancel occurs, code:%s", GET_TASKID(pTaskInfo),
+    qDebug("QID:0x%" PRIx64 " query abort due to error/cancel occurs, code:%s", GET_TASKID(pTaskInfo),
            tstrerror(pTaskInfo->code));
     return pTaskInfo->code;
   }
 
-  qDebug("QInfo:0x%" PRIx64 " query task is launched", GET_TASKID(pTaskInfo));
+  qDebug("QID:0x%" PRIx64 " query task is launched", GET_TASKID(pTaskInfo));
 
   bool newgroup = false;
   publishOperatorProfEvent(pTaskInfo->pRoot, QUERY_PROF_BEFORE_OPERATOR_EXEC);
@@ -190,8 +190,11 @@ int32_t qExecTask(qTaskInfo_t tinfo, SSDataBlock** pRes, uint64_t *useconds) {
     *useconds = pTaskInfo->cost.elapsedTime;
   }
 
-  qDebug("QInfo:0x%" PRIx64 " query paused, %d rows returned, total:%" PRId64 " rows, in sinkNode:%d",
-         GET_TASKID(pTaskInfo), 0, 0L, 0);
+  int32_t current = (*pRes != NULL)? (*pRes)->info.rows:0;
+  pTaskInfo->totalRows += current;
+
+  qDebug("QID:0x%" PRIx64 " task paused, %d rows returned, total:%" PRId64 " rows, in sinkNode:%d",
+         GET_TASKID(pTaskInfo), current, pTaskInfo->totalRows, 0);
 
   atomic_store_64(&pTaskInfo->owner, 0);
   return pTaskInfo->code;
@@ -200,14 +203,14 @@ int32_t qExecTask(qTaskInfo_t tinfo, SSDataBlock** pRes, uint64_t *useconds) {
 int32_t qRetrieveQueryResultInfo(qTaskInfo_t qinfo, bool* buildRes, void* pRspContext) {
   SQInfo *pQInfo = (SQInfo *)qinfo;
 
-  if (pQInfo == NULL || !isValidQInfo(pQInfo)) {
+  if (pQInfo == NULL) {
     qError("QInfo invalid qhandle");
     return TSDB_CODE_QRY_INVALID_QHANDLE;
   }
 
   *buildRes = false;
   if (IS_QUERY_KILLED(pQInfo)) {
-    qDebug("QInfo:0x%"PRIx64" query is killed, code:0x%08x", pQInfo->qId, pQInfo->code);
+    qDebug("QID:0x%"PRIx64" query is killed, code:0x%08x", pQInfo->qId, pQInfo->code);
     return pQInfo->code;
   }
 
@@ -227,11 +230,11 @@ int32_t qRetrieveQueryResultInfo(qTaskInfo_t qinfo, bool* buildRes, void* pRspCo
     assert(pQInfo->rspContext == NULL);
     if (pQInfo->dataReady == QUERY_RESULT_READY) {
       *buildRes = true;
-      qDebug("QInfo:0x%"PRIx64" retrieve result info, rowsize:%d, rows:%d, code:%s", pQInfo->qId, pQueryAttr->resultRowSize,
+      qDebug("QID:0x%"PRIx64" retrieve result info, rowsize:%d, rows:%d, code:%s", pQInfo->qId, pQueryAttr->resultRowSize,
              GET_NUM_OF_RESULTS(pRuntimeEnv), tstrerror(pQInfo->code));
     } else {
       *buildRes = false;
-      qDebug("QInfo:0x%"PRIx64" retrieve req set query return result after paused", pQInfo->qId);
+      qDebug("QID:0x%"PRIx64" retrieve req set query return result after paused", pQInfo->qId);
       pQInfo->rspContext = pRspContext;
       assert(pQInfo->rspContext != NULL);
     }
@@ -251,18 +254,18 @@ void* qGetResultRetrieveMsg(qTaskInfo_t qinfo) {
 }
 
 int32_t qKillTask(qTaskInfo_t qinfo) {
-  SQInfo *pQInfo = (SQInfo *)qinfo;
+  SExecTaskInfo *pTaskInfo = (SExecTaskInfo *)qinfo;
 
-  if (pQInfo == NULL || !isValidQInfo(pQInfo)) {
+  if (pTaskInfo == NULL) {
     return TSDB_CODE_QRY_INVALID_QHANDLE;
   }
 
-  qDebug("QInfo:0x%"PRIx64" query killed", pQInfo->qId);
-  setQueryKilled(pQInfo);
+  qDebug("QID:0x%"PRIx64" execTask killed", pTaskInfo->id.queryId);
+  setTaskKilled(pTaskInfo);
 
   // Wait for the query executing thread being stopped/
   // Once the query is stopped, the owner of qHandle will be cleared immediately.
-  while (pQInfo->owner != 0) {
+  while (pTaskInfo->owner != 0) {
     taosMsleep(100);
   }
 
@@ -270,14 +273,14 @@ int32_t qKillTask(qTaskInfo_t qinfo) {
 }
 
 int32_t qAsyncKillTask(qTaskInfo_t qinfo) {
-  SQInfo *pQInfo = (SQInfo *)qinfo;
+  SExecTaskInfo *pTaskInfo = (SExecTaskInfo *)qinfo;
 
-  if (pQInfo == NULL || !isValidQInfo(pQInfo)) {
+  if (pTaskInfo == NULL) {
     return TSDB_CODE_QRY_INVALID_QHANDLE;
   }
 
-  qDebug("QInfo:0x%"PRIx64" query async killed", pQInfo->qId);
-  setQueryKilled(pQInfo);
+  qDebug("QID:0x%"PRIx64" query async killed", pTaskInfo->id.queryId);
+  setTaskKilled(pTaskInfo);
 
   return TSDB_CODE_SUCCESS;
 }
@@ -292,15 +295,12 @@ int32_t qIsTaskCompleted(qTaskInfo_t qinfo) {
   return isTaskKilled(pTaskInfo) || Q_STATUS_EQUAL(pTaskInfo->status, TASK_OVER);
 }
 
-void qDestroyTask(qTaskInfo_t qHandle) {
-  SQInfo* pQInfo = (SQInfo*) qHandle;
-  if (!isValidQInfo(pQInfo)) {
-    return;
-  }
+void qDestroyTask(qTaskInfo_t qTaskHandle) {
+  SExecTaskInfo* pTaskInfo = (SExecTaskInfo*) qTaskHandle;
+  qDebug("QID:0x%"PRIx64" execTask completed, numOfRows:%"PRId64, pTaskInfo->id.queryId, pTaskInfo->totalRows);
 
-  qDebug("QInfo:0x%"PRIx64" query completed", pQInfo->qId);
-  queryCostStatis(pQInfo);   // print the query cost summary
-  doDestroyTask(pQInfo);
+  queryCostStatis(pTaskInfo);   // print the query cost summary
+  doDestroyTask(pTaskInfo);
 }
 
 void* qOpenTaskMgmt(int32_t vgId) {
@@ -381,7 +381,7 @@ void** qRegisterTask(void* pMgmt, uint64_t qId, void *qInfo) {
 
   STaskMgmt *pQueryMgmt = pMgmt;
   if (pQueryMgmt->qinfoPool == NULL) {
-    qError("QInfo:0x%"PRIx64"-%p failed to add qhandle into qMgmt, since qMgmt is closed", qId, (void*)qInfo);
+    qError("QID:0x%"PRIx64"-%p failed to add qhandle into qMgmt, since qMgmt is closed", qId, (void*)qInfo);
     terrno = TSDB_CODE_VND_INVALID_VGROUP_ID;
     return NULL;
   }
@@ -389,7 +389,7 @@ void** qRegisterTask(void* pMgmt, uint64_t qId, void *qInfo) {
   pthread_mutex_lock(&pQueryMgmt->lock);
   if (pQueryMgmt->closed) {
     pthread_mutex_unlock(&pQueryMgmt->lock);
-    qError("QInfo:0x%"PRIx64"-%p failed to add qhandle into cache, since qMgmt is colsing", qId, (void*)qInfo);
+    qError("QID:0x%"PRIx64"-%p failed to add qhandle into cache, since qMgmt is colsing", qId, (void*)qInfo);
     terrno = TSDB_CODE_VND_INVALID_VGROUP_ID;
     return NULL;
   } else {
@@ -445,7 +445,7 @@ int32_t qKillQueryByQId(void* pMgmt, int64_t qId, int32_t waitMs, int32_t waitCo
     return TSDB_CODE_QRY_INVALID_QHANDLE;
   }
   qWarn("QId:0x%"PRIx64" be killed(no memory commit).", pQInfo->qId);
-  setQueryKilled(pQInfo);
+  setTaskKilled(pQInfo);
 
   // wait query stop
   int32_t loop = 0;
diff --git a/source/libs/executor/src/executorimpl.c b/source/libs/executor/src/executorimpl.c
index bfd1bce499..9a2bb75b34 100644
--- a/source/libs/executor/src/executorimpl.c
+++ b/source/libs/executor/src/executorimpl.c
@@ -2432,9 +2432,9 @@ static bool needBuildResAfterQueryComplete(SQInfo* pQInfo) {
 }
 
 bool isTaskKilled(SExecTaskInfo *pTaskInfo) {
-  if (IS_QUERY_KILLED(pTaskInfo)) {
-    return true;
-  }
+//  if (IS_QUERY_KILLED(pTaskInfo)) {
+//    return true;
+//  }
 
   // query has been executed more than tsShellActivityTimer, and the retrieve has not arrived
   // abort current query execution.
@@ -2444,13 +2444,13 @@ bool isTaskKilled(SExecTaskInfo *pTaskInfo) {
     assert(pTaskInfo->cost.start != 0);
 //    qDebug("QInfo:%" PRIu64 " retrieve not arrive beyond %d ms, abort current query execution, start:%" PRId64
 //           ", current:%d", pQInfo->qId, 1, pQInfo->startExecTs, taosGetTimestampSec());
-    return true;
+//    return true;
   }
 
   return false;
 }
 
-void setQueryKilled(SQInfo *pQInfo) { pQInfo->code = TSDB_CODE_TSC_QUERY_CANCELLED;}
+void setTaskKilled(SExecTaskInfo *pTaskInfo) { pTaskInfo->code = TSDB_CODE_TSC_QUERY_CANCELLED;}
 
 //static bool isFixedOutputQuery(STaskAttr* pQueryAttr) {
 //  if (QUERY_IS_INTERVAL_QUERY(pQueryAttr)) {
@@ -4420,33 +4420,32 @@ void calculateOperatorProfResults(SQInfo* pQInfo) {
   taosArrayDestroy(opStack);
 }
 
-void queryCostStatis(SQInfo *pQInfo) {
-  STaskRuntimeEnv *pRuntimeEnv = &pQInfo->runtimeEnv;
-  STaskCostInfo *pSummary = &pQInfo->summary;
+void queryCostStatis(SExecTaskInfo *pTaskInfo) {
+  STaskCostInfo *pSummary = &pTaskInfo->cost;
 
-  uint64_t hashSize = taosHashGetMemSize(pQInfo->runtimeEnv.pResultRowHashTable);
-  hashSize += taosHashGetMemSize(pRuntimeEnv->tableqinfoGroupInfo.map);
-  pSummary->hashSize = hashSize;
+//  uint64_t hashSize = taosHashGetMemSize(pQInfo->runtimeEnv.pResultRowHashTable);
+//  hashSize += taosHashGetMemSize(pRuntimeEnv->tableqinfoGroupInfo.map);
+//  pSummary->hashSize = hashSize;
 
   // add the merge time
   pSummary->elapsedTime += pSummary->firstStageMergeTime;
 
-  SResultRowPool* p = pQInfo->runtimeEnv.pool;
-  if (p != NULL) {
-    pSummary->winInfoSize = getResultRowPoolMemSize(p);
-    pSummary->numOfTimeWindows = getNumOfAllocatedResultRows(p);
-  } else {
-    pSummary->winInfoSize = 0;
-    pSummary->numOfTimeWindows = 0;
-  }
-
-  calculateOperatorProfResults(pQInfo);
-
-  //qDebug("QInfo:0x%"PRIx64" :cost summary: elapsed time:%"PRId64" us, first merge:%"PRId64" us, total blocks:%d, "
-//         "load block statis:%d, load data block:%d, total rows:%"PRId64 ", check rows:%"PRId64,
-//         pQInfo->qId, pSummary->elapsedTime, pSummary->firstStageMergeTime, pSummary->totalBlocks, pSummary->loadBlockStatis,
-//         pSummary->loadBlocks, pSummary->totalRows, pSummary->totalCheckedRows);
+//  SResultRowPool* p = pTaskInfo->pool;
+//  if (p != NULL) {
+//    pSummary->winInfoSize = getResultRowPoolMemSize(p);
+//    pSummary->numOfTimeWindows = getNumOfAllocatedResultRows(p);
+//  } else {
+//    pSummary->winInfoSize = 0;
+//    pSummary->numOfTimeWindows = 0;
+//  }
+//
+//  calculateOperatorProfResults(pQInfo);
 
+  qDebug("QID:0x%"PRIx64" :cost summary: elapsed time:%"PRId64" us, first merge:%"PRId64" us, total blocks:%d, "
+         "load block statis:%d, load data block:%d, total rows:%"PRId64 ", check rows:%"PRId64,
+         pTaskInfo->id.queryId, pSummary->elapsedTime, pSummary->firstStageMergeTime, pSummary->totalBlocks, pSummary->loadBlockStatis,
+         pSummary->loadBlocks, pSummary->totalRows, pSummary->totalCheckedRows);
+//
   //qDebug("QInfo:0x%"PRIx64" :cost summary: winResPool size:%.2f Kb, numOfWin:%"PRId64", tableInfoSize:%.2f Kb, hashTable:%.2f Kb", pQInfo->qId, pSummary->winInfoSize/1024.0,
 //      pSummary->numOfTimeWindows, pSummary->tableInfoSize/1024.0, pSummary->hashSize/1024.0);
 
@@ -7733,7 +7732,6 @@ static SExecTaskInfo* createExecTaskInfo(uint64_t queryId) {
   SExecTaskInfo* pTaskInfo = calloc(1, sizeof(SExecTaskInfo));
   setTaskStatus(pTaskInfo, TASK_NOT_COMPLETED);
 
-  pthread_mutex_init(&pTaskInfo->lock, NULL);
   pTaskInfo->cost.created = taosGetTimestampMs();
   pTaskInfo->id.queryId = queryId;
   return pTaskInfo;
@@ -8673,229 +8671,6 @@ FORCE_INLINE bool checkQIdEqual(void *qHandle, uint64_t qId) {
   return ((SQInfo *)qHandle)->qId == qId;
 }
 
-SQInfo* createQInfoImpl(SQueryTableReq* pQueryMsg, SGroupbyExpr* pGroupbyExpr, SExprInfo* pExprs,
-                        SExprInfo* pSecExprs, STableGroupInfo* pTableGroupInfo, SColumnInfo* pTagCols, SFilterInfo* pFilters, int32_t vgId,
-                        char* sql, uint64_t qId, struct SUdfInfo* pUdfInfo) {
-  int16_t numOfCols = pQueryMsg->numOfCols;
-  int16_t numOfOutput = pQueryMsg->numOfOutput;
-
-  SQInfo *pQInfo = (SQInfo *)calloc(1, sizeof(SQInfo));
-  if (pQInfo == NULL) {
-    goto _cleanup_qinfo;
-  }
-
-  pQInfo->qId = qId;
-  pQInfo->startExecTs = 0;
-
-  pQInfo->runtimeEnv.pUdfInfo = pUdfInfo;
-
-  // to make sure third party won't overwrite this structure
-  pQInfo->signature = pQInfo;
-  STaskAttr* pQueryAttr = &pQInfo->query;
-  pQInfo->runtimeEnv.pQueryAttr = pQueryAttr;
-
-  pQueryAttr->tableGroupInfo  = *pTableGroupInfo;
-  pQueryAttr->numOfCols       = numOfCols;
-  pQueryAttr->numOfOutput     = numOfOutput;
-  pQueryAttr->limit.limit     = pQueryMsg->limit;
-  pQueryAttr->limit.offset    = pQueryMsg->offset;
-  pQueryAttr->order.order     = pQueryMsg->order;
-  pQueryAttr->order.col.info.colId = pQueryMsg->orderColId;
-  pQueryAttr->pExpr1          = pExprs;
-  pQueryAttr->pExpr2          = pSecExprs;
-  pQueryAttr->numOfExpr2      = pQueryMsg->secondStageOutput;
-  pQueryAttr->pGroupbyExpr    = pGroupbyExpr;
-  memcpy(&pQueryAttr->interval, &pQueryMsg->interval, sizeof(pQueryAttr->interval));
-  pQueryAttr->fillType        = pQueryMsg->fillType;
-  pQueryAttr->numOfTags       = pQueryMsg->numOfTags;
-  pQueryAttr->tagColList      = pTagCols;
-  pQueryAttr->prjInfo.vgroupLimit = pQueryMsg->vgroupLimit;
-  pQueryAttr->prjInfo.ts      = (pQueryMsg->order == TSDB_ORDER_ASC)? INT64_MIN:INT64_MAX;
-//  pQueryAttr->sw              = pQueryMsg->sw;
-  pQueryAttr->vgId            = vgId;
-
-  pQueryAttr->stableQuery     = pQueryMsg->stableQuery;
-  pQueryAttr->topBotQuery     = pQueryMsg->topBotQuery;
-  pQueryAttr->groupbyColumn   = pQueryMsg->groupbyColumn;
-  pQueryAttr->hasTagResults   = pQueryMsg->hasTagResults;
-  pQueryAttr->timeWindowInterpo = pQueryMsg->timeWindowInterpo;
-  pQueryAttr->queryBlockDist  = pQueryMsg->queryBlockDist;
-  pQueryAttr->stabledev       = pQueryMsg->stabledev;
-  pQueryAttr->tsCompQuery     = pQueryMsg->tsCompQuery;
-  pQueryAttr->simpleAgg       = pQueryMsg->simpleAgg;
-  pQueryAttr->pointInterpQuery = pQueryMsg->pointInterpQuery;
-  pQueryAttr->needReverseScan  = pQueryMsg->needReverseScan;
-  pQueryAttr->stateWindow      = pQueryMsg->stateWindow;
-  pQueryAttr->vgId            = vgId;
-//  pQueryAttr->pFilters        = pFilters;
-  
-  pQueryAttr->tableCols = calloc(numOfCols, sizeof(SSingleColumnFilterInfo));
-  if (pQueryAttr->tableCols == NULL) {
-    goto _cleanup;
-  }
-
-  pQueryAttr->srcRowSize = 0;
-  pQueryAttr->maxTableColumnWidth = 0;
-  for (int16_t i = 0; i < numOfCols; ++i) {
-    pQueryAttr->tableCols[i] = pQueryMsg->tableCols[i];
-//    pQueryAttr->tableCols[i].flist.filterInfo = tFilterInfoDup(pQueryMsg->tableCols[i].flist.filterInfo, pQueryAttr->tableCols[i].flist.numOfFilters);
-
-    pQueryAttr->srcRowSize += pQueryAttr->tableCols[i].bytes;
-    if (pQueryAttr->maxTableColumnWidth < pQueryAttr->tableCols[i].bytes) {
-      pQueryAttr->maxTableColumnWidth = pQueryAttr->tableCols[i].bytes;
-    }
-  }
-
-  for (int16_t col = 0; col < numOfOutput; ++col) {
-    assert(pExprs[col].base.resSchema.bytes > 0);
-    pQueryAttr->resultRowSize += pExprs[col].base.resSchema.bytes;
-
-    // keep the tag length
-    if (TSDB_COL_IS_TAG(pExprs[col].base.pColumns->flag)) {
-      pQueryAttr->tagLen += pExprs[col].base.resSchema.bytes;
-    }
-
-//    if (pExprs[col].base.flist.filterInfo) {
-//      ++pQueryAttr->havingNum;
-//    }
-  }
-
-  doUpdateExprColumnIndex(pQueryAttr);
-
-  if (pSecExprs != NULL) {
-    int32_t resultRowSize = 0;
-
-    // calculate the result row size
-    for (int16_t col = 0; col < pQueryAttr->numOfExpr2; ++col) {
-      assert(pSecExprs[col].base.resSchema.bytes > 0);
-      resultRowSize += pSecExprs[col].base.resSchema.bytes;
-    }
-
-    if (resultRowSize > pQueryAttr->resultRowSize) {
-      pQueryAttr->resultRowSize = resultRowSize;
-    }
-  }
-
-  if (pQueryAttr->fillType != TSDB_FILL_NONE) {
-    pQueryAttr->fillVal = malloc(sizeof(int64_t) * pQueryAttr->numOfOutput);
-    if (pQueryAttr->fillVal == NULL) {
-      goto _cleanup;
-    }
-
-    // the first column is the timestamp
-    memcpy(pQueryAttr->fillVal, (char *)pQueryMsg->fillVal, pQueryAttr->numOfOutput * sizeof(int64_t));
-  }
-
-  size_t numOfGroups = 0;
-  if (pTableGroupInfo->pGroupList != NULL) {
-    numOfGroups = taosArrayGetSize(pTableGroupInfo->pGroupList);
-    STableGroupInfo* pTableqinfo = &pQInfo->runtimeEnv.tableqinfoGroupInfo;
-
-    pTableqinfo->pGroupList = taosArrayInit(numOfGroups, POINTER_BYTES);
-    pTableqinfo->numOfTables = pTableGroupInfo->numOfTables;
-    pTableqinfo->map = taosHashInit(pTableGroupInfo->numOfTables, taosGetDefaultHashFunction(TSDB_DATA_TYPE_INT), true, HASH_NO_LOCK);
-  }
-
-  pQInfo->pBuf = calloc(pTableGroupInfo->numOfTables, sizeof(STableQueryInfo));
-  if (pQInfo->pBuf == NULL) {
-    goto _cleanup;
-  }
-
-  pQInfo->dataReady = QUERY_RESULT_NOT_READY;
-  pQInfo->rspContext = NULL;
-  pQInfo->sql = sql;
-  pthread_mutex_init(&pQInfo->lock, NULL);
-  tsem_init(&pQInfo->ready, 0, 0);
-
-  pQueryAttr->window = pQueryMsg->window;
-  updateDataCheckOrder(pQInfo, pQueryMsg, pQueryAttr->stableQuery);
-
-  STaskRuntimeEnv* pRuntimeEnv = &pQInfo->runtimeEnv;
-  STimeWindow window = pQueryAttr->window;
-
-  int32_t index = 0;
-  for(int32_t i = 0; i < numOfGroups; ++i) {
-    SArray* pa = taosArrayGetP(pQueryAttr->tableGroupInfo.pGroupList, i);
-
-    size_t s = taosArrayGetSize(pa);
-    SArray* p1 = taosArrayInit(s, POINTER_BYTES);
-    if (p1 == NULL) {
-      goto _cleanup;
-    }
-
-    taosArrayPush(pRuntimeEnv->tableqinfoGroupInfo.pGroupList, &p1);
-
-    for(int32_t j = 0; j < s; ++j) {
-//      STableKeyInfo* info = taosArrayGet(pa, j);
-//      window.skey = info->lastKey;
-//
-//      void* buf = (char*) pQInfo->pBuf + index * sizeof(STableQueryInfo);
-//      STableQueryInfo* item = createTableQueryInfo(pQueryAttr, info->pTable, pQueryAttr->groupbyColumn, window, buf);
-//      if (item == NULL) {
-//        goto _cleanup;
-//      }
-//
-//      item->groupIndex = i;
-//      taosArrayPush(p1, &item);
-
-//      STableId* id = TSDB_TABLEID(info->pTable);
-//      taosHashPut(pRuntimeEnv->tableqinfoGroupInfo.map, &id->tid, sizeof(id->tid), &item, POINTER_BYTES);
-//      index += 1;
-    }
-  }
-
-  colIdCheck(pQueryAttr, pQInfo->qId);
-
-//  int32_t functionId = getExprFunctionId(&pExpr[0]);
-//  pQInfo->query.queryBlockDist = (functionId == FUNCTION_BLKINFO);
-
-  //qDebug("qmsg:%p vgId:%d, QInfo:0x%" PRIx64 "-%p created", pQueryMsg, pQInfo->query.vgId, pQInfo->qId, pQInfo);
-  return pQInfo;
-
-_cleanup_qinfo:
-//  tsdbDestroyTableGroup(pTableGroupInfo);
-
-  if (pGroupbyExpr != NULL) {
-    taosArrayDestroy(pGroupbyExpr->columnInfo);
-    free(pGroupbyExpr);
-  }
-
-  tfree(pTagCols);
-  for (int32_t i = 0; i < numOfOutput; ++i) {
-    SExprInfo* pExprInfo = &pExprs[i];
-    if (pExprInfo->pExpr != NULL) {
-      tExprTreeDestroy(pExprInfo->pExpr, NULL);
-      pExprInfo->pExpr = NULL;
-    }
-
-//    if (pExprInfo->base.flist.filterInfo) {
-//      freeColumnFilterInfo(pExprInfo->base.flist.filterInfo, pExprInfo->base.flist.numOfFilters);
-//    }
-  }
-
-  tfree(pExprs);
-
-//  filterFreeInfo(pFilters);
-
-_cleanup:
-  doDestroyTask(pQInfo);
-  return NULL;
-}
-
-bool isValidQInfo(void *param) {
-  SQInfo *pQInfo = (SQInfo *)param;
-  if (pQInfo == NULL) {
-    return false;
-  }
-
-  /*
-   * pQInfo->signature may be changed by another thread, so we assign value of signature
-   * into local variable, then compare by using local variable
-   */
-  uint64_t sig = (uint64_t)pQInfo->signature;
-  return (sig == (uint64_t)pQInfo);
-}
-
 int32_t initQInfo(STsBufInfo* pTsBufInfo, void* tsdb, void* sourceOptr, SQInfo* pQInfo, STaskParam* param, char* start,
                   int32_t prevResultLen, void* merger) {
   int32_t code = TSDB_CODE_SUCCESS;
@@ -8957,7 +8732,7 @@ int32_t initQInfo(STsBufInfo* pTsBufInfo, void* tsdb, void* sourceOptr, SQInfo*
 
 _error:
   // table query ref will be decrease during error handling
-  doDestroyTask(pQInfo);
+//  doDestroyTask(pQInfo);
   return code;
 }
 
@@ -9038,36 +8813,14 @@ void* freeColumnInfo(SColumnInfo* pColumnInfo, int32_t numOfCols) {
   return NULL;
 }
 
-void doDestroyTask(SQInfo *pQInfo) {
-  if (!isValidQInfo(pQInfo)) {
-    return;
-  }
+void doDestroyTask(SExecTaskInfo *pTaskInfo) {
+  qDebug("QID:0x%"PRIx64" start to free execTask", pTaskInfo->id.queryId);
+  doDestroyTableQueryInfo(&pTaskInfo->tableqinfoGroupInfo);
+//  taosArrayDestroy(pTaskInfo->summary.queryProfEvents);
+//  taosHashCleanup(pTaskInfo->summary.operatorProfResults);
 
-  //qDebug("QInfo:0x%"PRIx64" start to free QInfo", pQInfo->qId);
-
-  STaskRuntimeEnv* pRuntimeEnv = &pQInfo->runtimeEnv;
-  releaseQueryBuf(pRuntimeEnv->tableqinfoGroupInfo.numOfTables);
-
-  doDestroyTableQueryInfo(&pRuntimeEnv->tableqinfoGroupInfo);
-  teardownQueryRuntimeEnv(&pQInfo->runtimeEnv);
-
-  STaskAttr *pQueryAttr = pQInfo->runtimeEnv.pQueryAttr;
-  freeQueryAttr(pQueryAttr);
-
-//  tsdbDestroyTableGroup(&pQueryAttr->tableGroupInfo);
-
-  tfree(pQInfo->pBuf);
-  tfree(pQInfo->sql);
-
-  taosArrayDestroy(pQInfo->summary.queryProfEvents);
-  taosHashCleanup(pQInfo->summary.operatorProfResults);
-
-  taosArrayDestroy(pRuntimeEnv->groupResInfo.pRows);
-  pQInfo->signature = 0;
-
-  //qDebug("QInfo:0x%"PRIx64" QInfo is freed", pQInfo->qId);
-
-  tfree(pQInfo);
+  qDebug("QID:0x%"PRIx64" execTask is freed", pTaskInfo->id.queryId);
+  tfree(pTaskInfo);
 }
 
 int32_t doDumpQueryResult(SQInfo *pQInfo, char *data, int8_t compressed, int32_t *compLen) {
diff --git a/source/libs/parser/inc/dataBlockMgt.h b/source/libs/parser/inc/dataBlockMgt.h
index cd84222c65..f53c5ea279 100644
--- a/source/libs/parser/inc/dataBlockMgt.h
+++ b/source/libs/parser/inc/dataBlockMgt.h
@@ -171,6 +171,8 @@ int32_t boundIdxCompar(const void *lhs, const void *rhs);
 void setBoundColumnInfo(SParsedDataColInfo* pColList, SSchema* pSchema, int32_t numOfCols);
 void destroyBoundColumnInfo(SParsedDataColInfo* pColList);
 void destroyBlockArrayList(SArray* pDataBlockList);
+void destroyBlockHashmap(SHashObj* pDataBlockHash);
+
 int32_t initMemRowBuilder(SMemRowBuilder *pBuilder, uint32_t nRows, uint32_t nCols, uint32_t nBoundCols, int32_t allNullLen);
 int32_t allocateMemIfNeed(STableDataBlocks *pDataBlock, int32_t rowSize, int32_t * numOfRows);
 int32_t getDataBlockFromList(SHashObj* pHashList, int64_t id, int32_t size, int32_t startOffset, int32_t rowSize,
diff --git a/source/libs/parser/src/astValidate.c b/source/libs/parser/src/astValidate.c
index 563443d3c3..0a2f2b20f2 100644
--- a/source/libs/parser/src/astValidate.c
+++ b/source/libs/parser/src/astValidate.c
@@ -213,10 +213,11 @@ SQueryStmtInfo *createQueryInfo() {
 
   pQueryInfo->slimit.limit   = -1;
   pQueryInfo->slimit.offset  = 0;
-  pQueryInfo->pDownstream = taosArrayInit(4, POINTER_BYTES);
+  pQueryInfo->pDownstream    = taosArrayInit(4, POINTER_BYTES);
   pQueryInfo->window         = TSWINDOW_INITIALIZER;
 
   pQueryInfo->exprList       = calloc(10, POINTER_BYTES);
+
   for(int32_t i = 0; i < 10; ++i) {
     pQueryInfo->exprList[i] = taosArrayInit(4, POINTER_BYTES);
   }
@@ -232,7 +233,8 @@ static void destroyQueryInfoImpl(SQueryStmtInfo* pQueryInfo) {
   cleanupFieldInfo(&pQueryInfo->fieldsInfo);
 
   dropAllExprInfo(pQueryInfo->exprList, 10);
-  pQueryInfo->exprList = NULL;
+
+  tfree(pQueryInfo->exprList);
 
   columnListDestroy(pQueryInfo->colList);
   pQueryInfo->colList = NULL;
@@ -258,10 +260,10 @@ void destroyQueryInfo(SQueryStmtInfo* pQueryInfo) {
 
     size_t numOfUpstream = taosArrayGetSize(pQueryInfo->pDownstream);
     for (int32_t i = 0; i < numOfUpstream; ++i) {
-      SQueryStmtInfo* pUpQueryInfo = taosArrayGetP(pQueryInfo->pDownstream, i);
-      destroyQueryInfoImpl(pUpQueryInfo);
-      clearAllTableMetaInfo(pUpQueryInfo, false, 0);
-      tfree(pUpQueryInfo);
+      SQueryStmtInfo* pDownstream = taosArrayGetP(pQueryInfo->pDownstream, i);
+      destroyQueryInfoImpl(pDownstream);
+      clearAllTableMetaInfo(pDownstream, false, 0);
+      tfree(pDownstream);
     }
 
     destroyQueryInfoImpl(pQueryInfo);
@@ -1395,6 +1397,13 @@ int32_t validateFillNode(SQueryStmtInfo *pQueryInfo, SSqlNode* pSqlNode, SMsgBuf
 static void pushDownAggFuncExprInfo(SQueryStmtInfo* pQueryInfo);
 static void addColumnNodeFromLowerLevel(SQueryStmtInfo* pQueryInfo);
 
+static void freeItemHelper(void* pItem) {
+  void** p = pItem;
+  if (*p != NULL) {
+    tfree(*p);
+  }
+}
+
 int32_t validateSqlNode(SSqlNode* pSqlNode, SQueryStmtInfo* pQueryInfo, SMsgBuf* pMsgBuf) {
   assert(pSqlNode != NULL && (pSqlNode->from == NULL || taosArrayGetSize(pSqlNode->from->list) > 0));
 
@@ -1590,7 +1599,10 @@ int32_t validateSqlNode(SSqlNode* pSqlNode, SQueryStmtInfo* pQueryInfo, SMsgBuf*
     SArray* functionList = extractFunctionList(pQueryInfo->exprList[i]);
     extractFunctionDesc(functionList, &pQueryInfo->info);
 
-    if ((code = checkForInvalidExpr(pQueryInfo, pMsgBuf)) != TSDB_CODE_SUCCESS) {
+    code = checkForInvalidExpr(pQueryInfo, pMsgBuf);
+    taosArrayDestroyEx(functionList, freeItemHelper);
+
+    if (code != TSDB_CODE_SUCCESS) {
       return code;
     }
   }
@@ -2902,6 +2914,8 @@ int32_t doAddOneProjectCol(SQueryStmtInfo* pQueryInfo, int32_t outputColIndex, S
   }
 
   pQueryInfo->info.projectionQuery = true;
+
+  taosArrayDestroy(pColumnList);
   return TSDB_CODE_SUCCESS;
 }
 
@@ -3983,5 +3997,9 @@ int32_t qParserValidateSqlNode(SParseContext *pCtx, SSqlInfo* pInfo, SQueryStmtI
     validateSqlNode(p, pQueryInfo, &buf);
   }
 
+  taosArrayDestroy(data.pTableMeta);
+  taosArrayDestroy(req.pUdf);
+  taosArrayDestroy(req.pTableName);
+
   return code;
 }
diff --git a/source/libs/parser/src/dataBlockMgt.c b/source/libs/parser/src/dataBlockMgt.c
index bc4eae7ae9..ece3d5f5eb 100644
--- a/source/libs/parser/src/dataBlockMgt.c
+++ b/source/libs/parser/src/dataBlockMgt.c
@@ -249,7 +249,7 @@ static FORCE_INLINE void convertSMemRow(SMemRow dest, SMemRow src, STableDataBlo
   }
 }
 
-void destroyDataBlock(STableDataBlocks* pDataBlock) {
+static void destroyDataBlock(STableDataBlocks* pDataBlock) {
   if (pDataBlock == NULL) {
     return;
   }
@@ -273,12 +273,29 @@ void destroyBlockArrayList(SArray* pDataBlockList) {
 
   size_t size = taosArrayGetSize(pDataBlockList);
   for (int32_t i = 0; i < size; i++) {
-    destroyDataBlock(taosArrayGetP(pDataBlockList, i));
+    void* p = taosArrayGetP(pDataBlockList, i);
+    destroyDataBlock(p);
   }
 
   taosArrayDestroy(pDataBlockList);
 }
 
+void destroyBlockHashmap(SHashObj* pDataBlockHash) {
+  if (pDataBlockHash == NULL) {
+    return;
+  }
+
+  void** p1 = taosHashIterate(pDataBlockHash, NULL);
+  while (p1) {
+    STableDataBlocks* pBlocks = *p1;
+    destroyDataBlock(pBlocks);
+
+    p1 = taosHashIterate(pDataBlockHash, p1);
+  }
+
+  taosHashCleanup(pDataBlockHash);
+}
+
 // data block is disordered, sort it in ascending order
 void sortRemoveDataBlockDupRowsRaw(STableDataBlocks *dataBuf) {
   SSubmitBlk *pBlocks = (SSubmitBlk *)dataBuf->pData;
@@ -490,7 +507,7 @@ int32_t mergeTableDataBlocks(SHashObj* pHashObj, int8_t schemaAttached, uint8_t
       }
 
       // the maximum expanded size in byte when a row-wise data is converted to SDataRow format
-      int32_t           expandSize = isRawPayload ? getRowExpandSize(pOneTableBlock->pTableMeta) : 0;
+      int32_t expandSize = isRawPayload ? getRowExpandSize(pOneTableBlock->pTableMeta) : 0;
       int64_t destSize = dataBuf->size + pOneTableBlock->size + pBlocks->numOfRows * expandSize +
                          sizeof(STColumn) * getNumOfColumns(pOneTableBlock->pTableMeta);
 
diff --git a/source/libs/parser/src/insertParser.c b/source/libs/parser/src/insertParser.c
index a031199992..cb7df824b0 100644
--- a/source/libs/parser/src/insertParser.c
+++ b/source/libs/parser/src/insertParser.c
@@ -525,10 +525,28 @@ static void destroyInsertParseContextForTable(SInsertParseContext* pCxt) {
   tdDestroyKVRowBuilder(&pCxt->tagsBuilder);
 }
 
+static void destroyDataBlock(STableDataBlocks* pDataBlock) {
+  if (pDataBlock == NULL) {
+    return;
+  }
+
+  tfree(pDataBlock->pData);
+  if (!pDataBlock->cloned) {
+    // free the refcount for metermeta
+    if (pDataBlock->pTableMeta != NULL) {
+      tfree(pDataBlock->pTableMeta);
+    }
+
+    destroyBoundColumnInfo(&pDataBlock->boundColumnInfo);
+  }
+  tfree(pDataBlock);
+}
+
 static void destroyInsertParseContext(SInsertParseContext* pCxt) {
   destroyInsertParseContextForTable(pCxt);
   taosHashCleanup(pCxt->pVgroupsHashObj);
-  taosHashCleanup(pCxt->pTableBlockHashObj);
+
+  destroyBlockHashmap(pCxt->pTableBlockHashObj);
   destroyBlockArrayList(pCxt->pTableDataBlocks);
   destroyBlockArrayList(pCxt->pVgDataBlocks);
 }
diff --git a/source/libs/parser/src/parser.c b/source/libs/parser/src/parser.c
index 4271aae451..c98f787f0b 100644
--- a/source/libs/parser/src/parser.c
+++ b/source/libs/parser/src/parser.c
@@ -248,10 +248,15 @@ void qDestroyQuery(SQueryNode* pQueryNode) {
   if (NULL == pQueryNode) {
     return;
   }
-  if (nodeType(pQueryNode) == TSDB_SQL_INSERT || nodeType(pQueryNode) == TSDB_SQL_CREATE_TABLE) {
+
+  int32_t type = nodeType(pQueryNode);
+  if (type == TSDB_SQL_INSERT || type == TSDB_SQL_CREATE_TABLE) {
     SVnodeModifOpStmtInfo* pModifInfo = (SVnodeModifOpStmtInfo*)pQueryNode;
     taosArrayDestroy(pModifInfo->pDataBlocks);
-  }
 
-  tfree(pQueryNode);
+    tfree(pQueryNode);
+  } else if (type == TSDB_SQL_SELECT) {
+    SQueryStmtInfo* pQueryStmtInfo = (SQueryStmtInfo*) pQueryNode;
+    destroyQueryInfo(pQueryStmtInfo);
+  }
 }
diff --git a/source/libs/parser/src/parserUtil.c b/source/libs/parser/src/parserUtil.c
index b8545b7486..a87e138ed0 100644
--- a/source/libs/parser/src/parserUtil.c
+++ b/source/libs/parser/src/parserUtil.c
@@ -732,18 +732,8 @@ void cleanupFieldInfo(SFieldInfo* pFieldInfo) {
     return;
   }
 
-  if (pFieldInfo->internalField != NULL) {
-    size_t num = taosArrayGetSize(pFieldInfo->internalField);
-    for (int32_t i = 0; i < num; ++i) {
-//      SInternalField* pfield = taosArrayGet(pFieldInfo->internalField, i);
-//      if (pfield->pExpr != NULL && pfield->pExpr->pExpr != NULL) {
-//        sqlExprDestroy(pfield->pExpr);
-//      }
-    }
-  }
-
   taosArrayDestroy(pFieldInfo->internalField);
-//  tfree(pFieldInfo->final);
+  tfree(pFieldInfo->final);
 
   memset(pFieldInfo, 0, sizeof(SFieldInfo));
 }
diff --git a/source/libs/parser/src/queryInfoUtil.c b/source/libs/parser/src/queryInfoUtil.c
index 1aa8836cb2..9a2ca2da98 100644
--- a/source/libs/parser/src/queryInfoUtil.c
+++ b/source/libs/parser/src/queryInfoUtil.c
@@ -191,10 +191,12 @@ void destroyExprInfo(SExprInfo* pExprInfo) {
   for(int32_t i = 0; i < pExprInfo->base.numOfParams; ++i) {
     taosVariantDestroy(&pExprInfo->base.param[i]);
   }
+
+  tfree(pExprInfo->base.pColumns);
   tfree(pExprInfo);
 }
 
-static void dropOneLevelExprInfo(SArray* pExprInfo) {
+void dropOneLevelExprInfo(SArray* pExprInfo) {
   size_t size = taosArrayGetSize(pExprInfo);
 
   for (int32_t i = 0; i < size; ++i) {
@@ -239,6 +241,9 @@ void assignExprInfo(SExprInfo* dst, const SExprInfo* src) {
 #endif
 
   dst->pExpr = exprdup(src->pExpr);
+  dst->base.pColumns = calloc(src->base.numOfCols, sizeof(SColumn));
+  memcpy(dst->base.pColumns, src->base.pColumns, sizeof(SColumn) * src->base.numOfCols);
+
   memset(dst->base.param, 0, sizeof(SVariant) * tListLen(dst->base.param));
   for (int32_t j = 0; j < src->base.numOfParams; ++j) {
     taosVariantAssign(&dst->base.param[j], &src->base.param[j]);
diff --git a/source/libs/planner/src/logicPlan.c b/source/libs/planner/src/logicPlan.c
index e817b764d5..de62f4a2ef 100644
--- a/source/libs/planner/src/logicPlan.c
+++ b/source/libs/planner/src/logicPlan.c
@@ -265,7 +265,6 @@ static SQueryPlanNode* doCreateQueryPlanForSingleTableImpl(const SQueryStmtInfo*
     } else {
       // here we can push down the projection to tablescan operator.
       pNode->numOfExpr = num;
-      pNode->pExpr = taosArrayInit(num, POINTER_BYTES);
       taosArrayAddAll(pNode->pExpr, p);
     }
   }
@@ -357,7 +356,6 @@ SArray* createQueryPlanImpl(const SQueryStmtInfo* pQueryInfo) {
       SArray* exprList = taosArrayInit(4, POINTER_BYTES);
       if (copyExprInfoList(exprList, pQueryInfo->exprList[0], uid, true) != 0) {
         terrno = TSDB_CODE_TSC_OUT_OF_MEMORY;
-//        dropAllExprInfo(exprList);
         exit(-1);
       }
 
@@ -373,7 +371,6 @@ SArray* createQueryPlanImpl(const SQueryStmtInfo* pQueryInfo) {
       // 4. add the projection query node
       SQueryPlanNode* pNode = doAddTableColumnNode(pQueryInfo, &info, exprList, tableColumnList);
       columnListDestroy(tableColumnList);
-//      dropAllExprInfo(exprList);
       taosArrayPush(pDownstream, &pNode);
     }
 
@@ -398,7 +395,8 @@ SArray* createQueryPlanImpl(const SQueryStmtInfo* pQueryInfo) {
 }
 
 static void doDestroyQueryNode(SQueryPlanNode* pQueryNode) {
-  if (pQueryNode->info.type == QNODE_MODIFY) {
+  int32_t type = nodeType(pQueryNode);
+  if (type == QNODE_MODIFY) {
     SDataPayloadInfo* pInfo = pQueryNode->pExtInfo;
 
     size_t size = taosArrayGetSize(pInfo->payload);
@@ -410,10 +408,16 @@ static void doDestroyQueryNode(SQueryPlanNode* pQueryNode) {
     taosArrayDestroy(pInfo->payload);
   }
 
+  if (type == QNODE_STREAMSCAN || type == QNODE_TABLESCAN) {
+    SQueryTableInfo* pQueryTableInfo = pQueryNode->pExtInfo;
+    tfree(pQueryTableInfo->tableName);
+  }
+
+  taosArrayDestroy(pQueryNode->pExpr);
+
   tfree(pQueryNode->pExtInfo);
   tfree(pQueryNode->pSchema);
   tfree(pQueryNode->info.name);
-//  dropAllExprInfo(pQueryNode->pExpr);
 
   if (pQueryNode->pChildren != NULL) {
     int32_t size = (int32_t) taosArrayGetSize(pQueryNode->pChildren);
diff --git a/source/libs/planner/src/physicalPlan.c b/source/libs/planner/src/physicalPlan.c
index 9288c240d0..12c0d0780b 100644
--- a/source/libs/planner/src/physicalPlan.c
+++ b/source/libs/planner/src/physicalPlan.c
@@ -155,6 +155,16 @@ static SPhyNode* initPhyNode(SQueryPlanNode* pPlanNode, int32_t type, int32_t si
   return node;
 }
 
+static void cleanupPhyNode(SPhyNode* pPhyNode) {
+  if (pPhyNode == NULL) {
+    return;
+  }
+
+  dropOneLevelExprInfo(pPhyNode->pTargets);
+  tfree(pPhyNode->targetSchema.pSchema);
+  tfree(pPhyNode);
+}
+
 static SPhyNode* initScanNode(SQueryPlanNode* pPlanNode, SQueryTableInfo* pTable, int32_t type, int32_t size) {
   SScanPhyNode* node = (SScanPhyNode*) initPhyNode(pPlanNode, type, size);
 
@@ -445,3 +455,29 @@ void setExchangSourceNode(uint64_t templateId, SDownstreamSource *pSource, SPhyN
 void setSubplanExecutionNode(SSubplan* subplan, uint64_t templateId, SDownstreamSource* pSource) {
   setExchangSourceNode(templateId, pSource, subplan->pNode);
 }
+
+static void destroyDataSinkNode(SDataSink* pSinkNode) {
+  if (pSinkNode == NULL) {
+    return;
+  }
+
+  if (nodeType(pSinkNode) == DSINK_Dispatch) {
+    SDataDispatcher* pDdSink = (SDataDispatcher*)pSinkNode;
+    tfree(pDdSink->sink.schema.pSchema);
+  }
+
+  tfree(pSinkNode);
+}
+
+void qDestroySubplan(SSubplan* pSubplan) {
+  if (pSubplan == NULL) {
+    return;
+  }
+
+  taosArrayDestroy(pSubplan->pChildren);
+  taosArrayDestroy(pSubplan->pParents);
+  destroyDataSinkNode(pSubplan->pDataSink);
+  cleanupPhyNode(pSubplan->pNode);
+
+  tfree(pSubplan);
+}
diff --git a/source/libs/planner/src/physicalPlanJson.c b/source/libs/planner/src/physicalPlanJson.c
index cf54fdec85..4fbec534f6 100644
--- a/source/libs/planner/src/physicalPlanJson.c
+++ b/source/libs/planner/src/physicalPlanJson.c
@@ -87,6 +87,7 @@ static bool fromObjectWithAlloc(const cJSON* json, const char* name, FFromJson f
 static const char* jkPnodeType = "Type";
 static int32_t getPnodeTypeSize(cJSON* json) {
   switch (getNumber(json, jkPnodeType)) {
+    case OP_StreamScan:
     case OP_TableScan:
     case OP_DataBlocksOptScan:
     case OP_TableSeqScan:
@@ -869,6 +870,7 @@ static bool specificPhyNodeFromJson(const cJSON* json, void* obj) {
   SPhyNode* phyNode = (SPhyNode*)obj;
   switch (phyNode->info.type) {
     case OP_TableScan:
+    case OP_StreamScan:
     case OP_DataBlocksOptScan:
     case OP_TableSeqScan:
       return tableScanNodeFromJson(json, obj);
@@ -1121,6 +1123,8 @@ int32_t subPlanToString(const SSubplan* subplan, char** str, int32_t* len) {
   }
 
   *str = cJSON_Print(json);
+  cJSON_Delete(json);
+
 //  printf("====Physical plan:====\n");
 //  printf("%s\n", *str);
   *len = strlen(*str) + 1;
@@ -1187,14 +1191,14 @@ SQueryDag* qJsonToDag(const cJSON* pRoot) {
   if(pDag == NULL) {
     return NULL;
   }
-  pDag->numOfSubplans = cJSON_GetNumberValue(cJSON_GetObjectItem(pRoot, "numOfSubplans"));
-  pDag->queryId = cJSON_GetNumberValue(cJSON_GetObjectItem(pRoot, "queryId"));
+  pDag->numOfSubplans = cJSON_GetNumberValue(cJSON_GetObjectItem(pRoot, "Number"));
+  pDag->queryId = cJSON_GetNumberValue(cJSON_GetObjectItem(pRoot, "QueryId"));
   pDag->pSubplans = taosArrayInit(0, sizeof(SArray));
   if (pDag->pSubplans == NULL) {
     free(pDag);
     return NULL;
   }
-  cJSON* pLevels = cJSON_GetObjectItem(pRoot, "pSubplans");
+  cJSON* pLevels = cJSON_GetObjectItem(pRoot, "Subplans");
   int level = cJSON_GetArraySize(pLevels);
   for(int i = 0; i < level; i++) {
     SArray* plansOneLevel = taosArrayInit(0, sizeof(void*));
diff --git a/source/libs/planner/src/planner.c b/source/libs/planner/src/planner.c
index 2fc4c8ea3e..d546925c5f 100644
--- a/source/libs/planner/src/planner.c
+++ b/source/libs/planner/src/planner.c
@@ -18,25 +18,6 @@
 
 static void extractResSchema(struct SQueryDag* const* pDag, SSchema** pResSchema, int32_t* numOfCols);
 
-static void destroyDataSinkNode(SDataSink* pSinkNode) {
-  if (pSinkNode == NULL) {
-    return;
-  }
-  tfree(pSinkNode);
-}
-
-void qDestroySubplan(SSubplan* pSubplan) {
-  if (pSubplan == NULL) {
-    return;
-  }
-
-  taosArrayDestroy(pSubplan->pChildren);
-  taosArrayDestroy(pSubplan->pParents);
-  destroyDataSinkNode(pSubplan->pDataSink);
-  // todo destroy pNode
-  tfree(pSubplan);
-}
-
 void qDestroyQueryDag(struct SQueryDag* pDag) {
   if (pDag == NULL) {
     return;
@@ -51,6 +32,7 @@ void qDestroyQueryDag(struct SQueryDag* pDag) {
       SSubplan* pSubplan = taosArrayGetP(pa, j);
       qDestroySubplan(pSubplan);
     }
+
     taosArrayDestroy(pa);
   }
 
diff --git a/source/libs/qworker/src/qworker.c b/source/libs/qworker/src/qworker.c
index b53fd9ff37..d09f749805 100644
--- a/source/libs/qworker/src/qworker.c
+++ b/source/libs/qworker/src/qworker.c
@@ -492,7 +492,7 @@ int32_t qwExecTask(QW_FPARAMS_DEF, SQWTaskCtx *ctx) {
     SInputData inputData = {.pData = pRes, .pTableRetrieveTsMap = NULL};
     code = dsPutDataBlock(sinkHandle, &inputData, &qcontinue);
     if (code) {
-      QW_TASK_ELOG("dsPutDataBlock failed, code:%x", code);
+      QW_TASK_ELOG("dsPutDataBlock failed, code:%s", tstrerror(code));
       QW_ERR_JRET(code);
     }
 
diff --git a/source/libs/scheduler/src/scheduler.c b/source/libs/scheduler/src/scheduler.c
index f90fdd6e11..223fa300df 100644
--- a/source/libs/scheduler/src/scheduler.c
+++ b/source/libs/scheduler/src/scheduler.c
@@ -1490,7 +1490,7 @@ int32_t schedulerConvertDagToTaskList(SQueryDag* pDag, SArray **pTasks) {
     
     SSubQueryMsg *pMsg = (SSubQueryMsg*) msg;
     
-    pMsg->header.vgId = htonl(tInfo.addr.nodeId);
+    pMsg->header.vgId = tInfo.addr.nodeId;
     
     pMsg->sId = schMgmt.sId;
     pMsg->queryId = plan->id.queryId;
@@ -1512,9 +1512,7 @@ int32_t schedulerConvertDagToTaskList(SQueryDag* pDag, SArray **pTasks) {
   info = NULL;
   
 _return:
-
   schedulerFreeTaskList(info);
-
   SCH_RET(code);
 }
 
diff --git a/source/libs/transport/inc/transComm.h b/source/libs/transport/inc/transComm.h
index c760acd52e..c7a23a2482 100644
--- a/source/libs/transport/inc/transComm.h
+++ b/source/libs/transport/inc/transComm.h
@@ -123,9 +123,9 @@ typedef struct {
 } SRpcReqContext;
 
 typedef struct {
-  SRpcInfo* pRpc;     // associated SRpcInfo
-  SEpSet    epSet;    // ip list provided by app
-  void*     ahandle;  // handle provided by app
+  SRpcInfo* pTransInst;  // associated SRpcInfo
+  SEpSet    epSet;       // ip list provided by app
+  void*     ahandle;     // handle provided by app
   // struct SRpcConn* pConn;     // pConn allocated
   tmsg_t   msgType;  // message type
   uint8_t* pCont;    // content provided by app
@@ -182,7 +182,7 @@ typedef struct {
 
 #define TRANS_RESERVE_SIZE (sizeof(STranConnCtx))
 
-#define TRANS_MSG_OVERHEAD (sizeof(STransMsgHead) + sizeof(STransDigestMsg))
+#define TRANS_MSG_OVERHEAD (sizeof(STransMsgHead))
 #define transHeadFromCont(cont) ((STransMsgHead*)((char*)cont - sizeof(STransMsgHead)))
 #define transContFromHead(msg) (msg + sizeof(STransMsgHead))
 #define transMsgLenFromCont(contLen) (contLen + sizeof(STransMsgHead))
@@ -201,6 +201,7 @@ bool transDecompressMsg(char* msg, int32_t len, int32_t* flen);
 
 void transConnCtxDestroy(STransConnCtx* ctx);
 
+void transFreeMsg(void* msg);
 typedef struct SConnBuffer {
   char* buf;
   int   len;
diff --git a/source/libs/transport/src/rpcMain.c b/source/libs/transport/src/rpcMain.c
index 3c58a76a44..2d39a9cea5 100644
--- a/source/libs/transport/src/rpcMain.c
+++ b/source/libs/transport/src/rpcMain.c
@@ -242,11 +242,14 @@ void *rpcOpen(const SRpcInit *pInit) {
   pRpc = (SRpcInfo *)calloc(1, sizeof(SRpcInfo));
   if (pRpc == NULL) return NULL;
 
-  if (pInit->label) tstrncpy(pRpc->label, pInit->label, strlen(pInit->label));
+  if (pInit->label) tstrncpy(pRpc->label, pInit->label, tListLen(pInit->label));
 
   pRpc->connType = pInit->connType;
   if (pRpc->connType == TAOS_CONN_CLIENT) {
     pRpc->numOfThreads = pInit->numOfThreads;
+    if (pRpc->numOfThreads >= 10) {
+      pRpc->numOfThreads = 10;
+    }
   } else {
     pRpc->numOfThreads = pInit->numOfThreads > TSDB_MAX_RPC_THREADS ? TSDB_MAX_RPC_THREADS : pInit->numOfThreads;
   }
@@ -769,8 +772,8 @@ static SRpcConn *rpcAllocateServerConn(SRpcInfo *pRpc, SRecvInfo *pRecv) {
     }
 
     taosHashPut(pRpc->hash, hashstr, size, (char *)&pConn, POINTER_BYTES);
-    tDebug("%s %p server connection is allocated, uid:0x%x sid:%d key:%s spi:%d", pRpc->label, pConn, pConn->linkUid, sid,
-           hashstr, pConn->spi);
+    tDebug("%s %p server connection is allocated, uid:0x%x sid:%d key:%s spi:%d", pRpc->label, pConn, pConn->linkUid,
+           sid, hashstr, pConn->spi);
   }
 
   return pConn;
diff --git a/source/libs/transport/src/transCli.c b/source/libs/transport/src/transCli.c
index bfadfe56ef..f265acf8c1 100644
--- a/source/libs/transport/src/transCli.c
+++ b/source/libs/transport/src/transCli.c
@@ -30,6 +30,7 @@ typedef struct SCliConn {
   char         spi;
   char         secured;
   uint64_t     expireTime;
+  int8_t       notifyCount;  // timers already notify to client
 } SCliConn;
 
 typedef struct SCliMsg {
@@ -72,8 +73,6 @@ static void      addConnToPool(void* pool, char* ip, uint32_t port, SCliConn* co
 
 // register timer in each thread to clear expire conn
 static void clientTimeoutCb(uv_timer_t* handle);
-// process data read from server, auth/decompress etc later
-static void clientHandleResp(SCliConn* conn);
 // check whether already read complete packet from server
 static bool clientReadComplete(SConnBuffer* pBuf);
 // alloc buf for read
@@ -88,10 +87,15 @@ static void clientAsyncCb(uv_async_t* handle);
 static void clientDestroy(uv_handle_t* handle);
 static void clientConnDestroy(SCliConn* pConn, bool clear /*clear tcp handle or not*/);
 
-static void clientMsgDestroy(SCliMsg* pMsg);
+// process data read from server, auth/decompress etc later
+static void clientHandleResp(SCliConn* conn);
+// handle except about conn
+static void clientHandleExcept(SCliConn* conn);
 // handle req from app
 static void clientHandleReq(SCliMsg* pMsg, SCliThrdObj* pThrd);
 
+static void clientMsgDestroy(SCliMsg* pMsg);
+static void destroyTransConnCtx(STransConnCtx* ctx);
 // thread obj
 static SCliThrdObj* createThrdObj();
 static void         destroyThrdObj(SCliThrdObj* pThrd);
@@ -100,22 +104,50 @@ static void* clientThread(void* arg);
 
 static void clientHandleResp(SCliConn* conn) {
   STransConnCtx* pCtx = ((SCliMsg*)conn->data)->ctx;
-  SRpcInfo*      pRpc = pCtx->pRpc;
-  SRpcMsg        rpcMsg;
+  SRpcInfo*      pRpc = pCtx->pTransInst;
 
-  rpcMsg.pCont = conn->readBuf.buf;
-  rpcMsg.contLen = conn->readBuf.len;
+  STransMsgHead* pHead = (STransMsgHead*)(conn->readBuf.buf);
+  pHead->code = htonl(pHead->code);
+  pHead->msgLen = htonl(pHead->msgLen);
+
+  SRpcMsg rpcMsg;
+  rpcMsg.contLen = transContLenFromMsg(pHead->msgLen);
+  rpcMsg.pCont = transContFromHead(pHead);
+  rpcMsg.code = pHead->code;
+  rpcMsg.msgType = pHead->msgType;
   rpcMsg.ahandle = pCtx->ahandle;
+
   (pRpc->cfp)(NULL, &rpcMsg, NULL);
+  conn->notifyCount += 1;
 
   SCliThrdObj* pThrd = conn->hostThrd;
+  tfree(conn->data);
   addConnToPool(pThrd->pool, pCtx->ip, pCtx->port, conn);
+
+  // start thread's timer of conn pool if not active
   if (!uv_is_active((uv_handle_t*)pThrd->pTimer) && pRpc->idleTime > 0) {
     uv_timer_start((uv_timer_t*)pThrd->pTimer, clientTimeoutCb, CONN_PERSIST_TIME(pRpc->idleTime) / 2, 0);
   }
-  free(pCtx->ip);
-  free(pCtx);
-  // impl
+  destroyTransConnCtx(pCtx);
+}
+static void clientHandleExcept(SCliConn* pConn) {
+  SCliMsg* pMsg = pConn->data;
+
+  STransConnCtx* pCtx = pMsg->ctx;
+  SRpcInfo*      pRpc = pCtx->pTransInst;
+
+  transFreeMsg((pMsg->msg.pCont));
+  pMsg->msg.pCont = NULL;
+
+  SRpcMsg rpcMsg = {0};
+  rpcMsg.ahandle = pCtx->ahandle;
+  rpcMsg.code = -1;
+  // SRpcInfo* pRpc = pMsg->ctx->pRpc;
+  (pRpc->cfp)(NULL, &rpcMsg, NULL);
+  tfree(pConn->data);
+  pConn->notifyCount += 1;
+  destroyTransConnCtx(pCtx);
+  clientConnDestroy(pConn, true);
 }
 
 static void clientTimeoutCb(uv_timer_t* handle) {
@@ -191,6 +223,7 @@ static void addConnToPool(void* pool, char* ip, uint32_t port, SCliConn* conn) {
   SRpcInfo* pRpc = ((SCliThrdObj*)conn->hostThrd)->pTransInst;
   conn->expireTime = taosGetTimestampMs() + CONN_PERSIST_TIME(pRpc->idleTime);
   SConnList* plist = taosHashGet((SHashObj*)pool, key, strlen(key));
+  conn->notifyCount = 0;
   // list already create before
   assert(plist != NULL);
   QUEUE_PUSH(&plist->conn, &conn->conn);
@@ -246,19 +279,21 @@ static void clientReadCb(uv_stream_t* handle, ssize_t nread, const uv_buf_t* buf
   if (nread > 0) {
     pBuf->len += nread;
     if (clientReadComplete(pBuf)) {
-      tDebug("alread read complete");
+      tDebug("conn %p read complete", conn);
       clientHandleResp(conn);
     } else {
-      tDebug("read half packet, continue to read");
+      tDebug("conn %p read partial packet, continue to read", conn);
     }
     return;
   }
   assert(nread <= 0);
   if (nread == 0) {
+    tError("conn %p closed", conn);
     return;
   }
-  if (nread != UV_EOF) {
-    tDebug("read error %s", uv_err_name(nread));
+  if (nread < 0) {
+    tError("conn %p read error: %s", conn, uv_err_name(nread));
+    clientHandleExcept(conn);
   }
   // tDebug("Read error %s\n", uv_err_name(nread));
   // uv_close((uv_handle_t*)handle, clientDestroy);
@@ -282,19 +317,24 @@ static void clientDestroy(uv_handle_t* handle) {
 
 static void clientWriteCb(uv_write_t* req, int status) {
   SCliConn* pConn = req->data;
+
+  SCliMsg* pMsg = pConn->data;
+  transFreeMsg((pMsg->msg.pCont));
+  pMsg->msg.pCont = NULL;
+
   if (status == 0) {
-    tDebug("data already was written on stream");
+    tDebug("conn %p data already was written out", pConn);
   } else {
-    tError("failed to write: %s", uv_err_name(status));
-    clientConnDestroy(pConn, true);
+    tError("conn %p failed to write: %s", pConn, uv_err_name(status));
+    clientHandleExcept(pConn);
     return;
   }
   SCliThrdObj* pThrd = pConn->hostThrd;
-  if (pConn->stream == NULL) {
-    pConn->stream = (uv_stream_t*)malloc(sizeof(uv_tcp_t));
-    uv_tcp_init(pThrd->loop, (uv_tcp_t*)pConn->stream);
-    pConn->stream->data = pConn;
-  }
+  // if (pConn->stream == NULL) {
+  //  pConn->stream = (uv_stream_t*)malloc(sizeof(uv_tcp_t));
+  //  uv_tcp_init(pThrd->loop, (uv_tcp_t*)pConn->stream);
+  //  pConn->stream->data = pConn;
+  //}
   uv_read_start((uv_stream_t*)pConn->stream, clientAllocReadBufferCb, clientReadCb);
   // impl later
 }
@@ -310,30 +350,19 @@ static void clientWrite(SCliConn* pConn) {
   pHead->msgLen = (int32_t)htonl((uint32_t)msgLen);
 
   uv_buf_t wb = uv_buf_init((char*)pHead, msgLen);
-  tDebug("data write out, msgType : %d, len: %d", pHead->msgType, msgLen);
+  tDebug("conn %p data write out, msgType : %d, len: %d", pConn, pHead->msgType, msgLen);
   uv_write(pConn->writeReq, (uv_stream_t*)pConn->stream, &wb, 1, clientWriteCb);
 }
 static void clientConnCb(uv_connect_t* req, int status) {
   // impl later
   SCliConn* pConn = req->data;
-  SCliMsg*  pMsg = pConn->data;
-
-  STransConnCtx* pCtx = pMsg->ctx;
-  SRpcInfo*      pRpc = pCtx->pRpc;
-
   if (status != 0) {
     // tError("failed to connect server(%s, %d), errmsg: %s", pCtx->ip, pCtx->port, uv_strerror(status));
-    tError("failed to connect server,  errmsg: %s", uv_strerror(status));
-    // call user fp later
-    SRpcMsg rpcMsg;
-    rpcMsg.ahandle = pCtx->ahandle;
-    // SRpcInfo* pRpc = pMsg->ctx->pRpc;
-    (pRpc->cfp)(NULL, &rpcMsg, NULL);
-
-    clientConnDestroy(pConn, true);
-    // uv_close((uv_handle_t*)req->handle, clientDestroy);
+    tError("conn %p failed to connect server: %s", pConn, uv_strerror(status));
+    clientHandleExcept(pConn);
     return;
   }
+  tDebug("conn %p create", pConn);
 
   assert(pConn->stream == req->handle);
   clientWrite(pConn);
@@ -349,6 +378,7 @@ static void clientHandleReq(SCliMsg* pMsg, SCliThrdObj* pThrd) {
   SCliConn*      conn = getConnFromPool(pThrd->pool, pCtx->ip, pCtx->port);
   if (conn != NULL) {
     // impl later
+    tDebug("conn %p get from conn pool", conn);
     conn->data = pMsg;
     conn->writeReq->data = conn;
 
@@ -462,6 +492,13 @@ static void destroyThrdObj(SCliThrdObj* pThrd) {
   free(pThrd->loop);
   free(pThrd);
 }
+
+static void destroyTransConnCtx(STransConnCtx* ctx) {
+  if (ctx != NULL) {
+    free(ctx->ip);
+  }
+  free(ctx);
+}
 //
 void taosCloseClient(void* arg) {
   // impl later
@@ -472,7 +509,6 @@ void taosCloseClient(void* arg) {
   free(cli->pThreadObj);
   free(cli);
 }
-
 void rpcSendRequest(void* shandle, const SEpSet* pEpSet, SRpcMsg* pMsg, int64_t* pRid) {
   // impl later
   char*    ip = (char*)(pEpSet->fqdn[pEpSet->inUse]);
@@ -487,7 +523,7 @@ void rpcSendRequest(void* shandle, const SEpSet* pEpSet, SRpcMsg* pMsg, int64_t*
 
   STransConnCtx* pCtx = calloc(1, sizeof(STransConnCtx));
 
-  pCtx->pRpc = (SRpcInfo*)shandle;
+  pCtx->pTransInst = (SRpcInfo*)shandle;
   pCtx->ahandle = pMsg->ahandle;
   pCtx->msgType = pMsg->msgType;
   pCtx->ip = strdup(ip);
diff --git a/source/libs/transport/src/transComm.c b/source/libs/transport/src/transComm.c
index 617abeea39..5bece11bec 100644
--- a/source/libs/transport/src/transComm.c
+++ b/source/libs/transport/src/transComm.c
@@ -191,4 +191,11 @@ void transConnCtxDestroy(STransConnCtx* ctx) {
   free(ctx->ip);
   free(ctx);
 }
+
+void transFreeMsg(void* msg) {
+  if (msg == NULL) {
+    return;
+  }
+  free((char*)msg - sizeof(STransMsgHead));
+}
 #endif
diff --git a/source/libs/transport/src/transSrv.c b/source/libs/transport/src/transSrv.c
index b519a35f24..c70b1a5b28 100644
--- a/source/libs/transport/src/transSrv.c
+++ b/source/libs/transport/src/transSrv.c
@@ -16,6 +16,7 @@
 #ifdef USE_UV
 
 #include "transComm.h"
+
 typedef struct SConn {
   uv_tcp_t*   pTcp;
   uv_write_t* pWriter;
@@ -26,7 +27,6 @@ typedef struct SConn {
   int         ref;
   int         persist;  // persist connection or not
   SConnBuffer connBuf;  // read buf,
-  int         count;
   int         inType;
   void*       pTransInst;  // rpc init
   void*       ahandle;     //
@@ -226,7 +226,7 @@ static void uvHandleActivityTimeout(uv_timer_t* handle) {
   tDebug("%p timeout since no activity", conn);
 }
 
-static void uvProcessData(SConn* pConn) {
+static void uvHandleReq(SConn* pConn) {
   SRecvInfo    info;
   SRecvInfo*   p = &info;
   SConnBuffer* pBuf = &pConn->connBuf;
@@ -271,6 +271,7 @@ static void uvProcessData(SConn* pConn) {
   rpcMsg.ahandle = NULL;
   rpcMsg.handle = pConn;
 
+  pConn->ref++;
   (*(pRpc->cfp))(pRpc->parent, &rpcMsg, NULL);
   // uv_timer_start(pConn->pTimer, uvHandleActivityTimeout, pRpc->idleTime * 10000, 0);
   // auth
@@ -283,20 +284,23 @@ void uvOnReadCb(uv_stream_t* cli, ssize_t nread, const uv_buf_t* buf) {
   SConnBuffer* pBuf = &conn->connBuf;
   if (nread > 0) {
     pBuf->len += nread;
-    tDebug("on read %p, total read: %d, current read: %d", cli, pBuf->len, (int)nread);
+    tDebug("conn %p read summroy, total read: %d, current read: %d", conn, pBuf->len, (int)nread);
     if (readComplete(pBuf)) {
-      tDebug("alread read complete packet");
-      uvProcessData(conn);
+      tDebug("conn %p alread read complete packet", conn);
+      uvHandleReq(conn);
     } else {
-      tDebug("read half packet, continue to read");
+      tDebug("conn %p read partial packet, continue to read", conn);
     }
     return;
   }
   if (nread == 0) {
+    tDebug("conn %p except read", conn);
+    // destroyConn(conn, true);
     return;
   }
   if (nread != UV_EOF) {
-    tDebug("read error %s", uv_err_name(nread));
+    tDebug("conn %p read error: %s", conn, uv_err_name(nread));
+    destroyConn(conn, true);
   }
 }
 void uvAllocConnBufferCb(uv_handle_t* handle, size_t suggested_size, uv_buf_t* buf) {
@@ -306,7 +310,8 @@ void uvAllocConnBufferCb(uv_handle_t* handle, size_t suggested_size, uv_buf_t* b
 
 void uvOnTimeoutCb(uv_timer_t* handle) {
   // opt
-  tDebug("time out");
+  SConn* pConn = handle->data;
+  tDebug("conn %p time out", pConn);
 }
 
 void uvOnWriteCb(uv_write_t* req, int status) {
@@ -316,10 +321,14 @@ void uvOnWriteCb(uv_write_t* req, int status) {
   buf->len = 0;
   memset(buf->buf, 0, buf->cap);
   buf->left = -1;
+
+  SRpcMsg* pMsg = &conn->sendMsg;
+  transFreeMsg(pMsg->pCont);
+
   if (status == 0) {
-    tDebug("data already was written on stream");
+    tDebug("conn %p data already was written on stream", conn);
   } else {
-    tDebug("failed to write data, %s", uv_err_name(status));
+    tDebug("conn %p failed to write data, %s", conn, uv_err_name(status));
     destroyConn(conn, true);
   }
   // opt
@@ -334,7 +343,7 @@ static void uvOnPipeWriteCb(uv_write_t* req, int status) {
 
 static void uvPrepareSendData(SConn* conn, uv_buf_t* wb) {
   // impl later;
-  tDebug("prepare to send back");
+  tDebug("conn %p prepare to send resp", conn);
   SRpcMsg* pMsg = &conn->sendMsg;
   if (pMsg->pCont == 0) {
     pMsg->pCont = (void*)rpcMallocCont(0);
@@ -427,6 +436,7 @@ void uvOnConnectionCb(uv_stream_t* q, ssize_t nread, const uv_buf_t* buf) {
   assert(pending == UV_TCP);
 
   SConn* pConn = createConn();
+
   pConn->pTransInst = pThrd->pTransInst;
   /* init conn timer*/
   pConn->pTimer = malloc(sizeof(uv_timer_t));
@@ -448,7 +458,7 @@ void uvOnConnectionCb(uv_stream_t* q, ssize_t nread, const uv_buf_t* buf) {
   if (uv_accept(q, (uv_stream_t*)(pConn->pTcp)) == 0) {
     uv_os_fd_t fd;
     uv_fileno((const uv_handle_t*)pConn->pTcp, &fd);
-    tDebug("new connection created: %d", fd);
+    tDebug("conn %p created, fd: %d", pConn, fd);
     uv_read_start((uv_stream_t*)(pConn->pTcp), uvAllocReadBufferCb, uvOnReadCb);
   } else {
     tDebug("failed to create new connection");
@@ -515,19 +525,19 @@ void* workerThread(void* arg) {
 
 static SConn* createConn() {
   SConn* pConn = (SConn*)calloc(1, sizeof(SConn));
+  ++pConn->ref;
   return pConn;
 }
-static void connCloseCb(uv_handle_t* handle) {
-  // impl later
-  //
-}
+
 static void destroyConn(SConn* conn, bool clear) {
   if (conn == NULL) {
     return;
   }
+  if (--conn->ref == 0) {
+    return;
+  }
   if (clear) {
-    uv_handle_t handle = *((uv_handle_t*)conn->pTcp);
-    uv_close(&handle, NULL);
+    uv_close((uv_handle_t*)conn->pTcp, NULL);
   }
   uv_timer_stop(conn->pTimer);
   free(conn->pTimer);
@@ -646,6 +656,7 @@ void rpcSendResponse(const SRpcMsg* pMsg) {
   pthread_mutex_lock(&pThrd->connMtx);
   QUEUE_PUSH(&pThrd->conn, &pConn->queue);
   pthread_mutex_unlock(&pThrd->connMtx);
+  tDebug("conn %p start to send resp", pConn);
 
   uv_async_send(pConn->pWorkerAsync);
 }
diff --git a/source/libs/transport/test/rclient.c b/source/libs/transport/test/rclient.c
index fd3496cc17..84814f39fc 100644
--- a/source/libs/transport/test/rclient.c
+++ b/source/libs/transport/test/rclient.c
@@ -63,7 +63,7 @@ static void *sendRequest(void *param) {
     if (pInfo->num % 20000 == 0) tInfo("thread:%d, %d requests have been sent", pInfo->index, pInfo->num);
     // tsem_wait(&pInfo->rspSem);
     tsem_wait(&pInfo->rspSem);
-    tDebug("recv response");
+    tDebug("recv response succefully");
     // usleep(100000000);
   }