diff --git a/examples/c/tmq.c b/examples/c/tmq.c
index 71e571d4dd..eb41ad039a 100644
--- a/examples/c/tmq.c
+++ b/examples/c/tmq.c
@@ -20,7 +20,7 @@
 #include <time.h>
 #include "taos.h"
 
-static int  running = 1;
+static int running = 1;
 
 static int32_t msg_process(TAOS_RES* msg) {
   char    buf[1024];
@@ -40,8 +40,8 @@ static int32_t msg_process(TAOS_RES* msg) {
 
     TAOS_FIELD* fields = taos_fetch_fields(msg);
     int32_t     numOfFields = taos_field_count(msg);
-    //int32_t*    length = taos_fetch_lengths(msg);
-    int32_t     precision = taos_result_precision(msg);
+    // int32_t*    length = taos_fetch_lengths(msg);
+    int32_t precision = taos_result_precision(msg);
     rows++;
     taos_print_row(buf, row, fields, numOfFields);
     printf("precision: %d, row content: %s\n", precision, buf);
@@ -62,14 +62,12 @@ static int32_t init_env() {
   pRes = taos_query(pConn, "drop topic topicname");
   if (taos_errno(pRes) != 0) {
     printf("error in drop tmqdb, reason:%s\n", taos_errstr(pRes));
-    return -1;
   }
   taos_free_result(pRes);
 
   pRes = taos_query(pConn, "drop database if exists tmqdb");
   if (taos_errno(pRes) != 0) {
     printf("error in drop tmqdb, reason:%s\n", taos_errstr(pRes));
-    return -1;
   }
   taos_free_result(pRes);
 
@@ -77,7 +75,7 @@ static int32_t init_env() {
   pRes = taos_query(pConn, "create database tmqdb precision 'ns'");
   if (taos_errno(pRes) != 0) {
     printf("error in create tmqdb, reason:%s\n", taos_errstr(pRes));
-    return -1;
+    goto END;
   }
   taos_free_result(pRes);
 
@@ -87,7 +85,7 @@ static int32_t init_env() {
       pConn, "create table tmqdb.stb (ts timestamp, c1 int, c2 float, c3 varchar(16)) tags(t1 int, t3 varchar(16))");
   if (taos_errno(pRes) != 0) {
     printf("failed to create super table stb, reason:%s\n", taos_errstr(pRes));
-    return -1;
+    goto END;
   }
   taos_free_result(pRes);
 
@@ -96,28 +94,28 @@ static int32_t init_env() {
   pRes = taos_query(pConn, "create table tmqdb.ctb0 using tmqdb.stb tags(0, 'subtable0')");
   if (taos_errno(pRes) != 0) {
     printf("failed to create super table ctb0, reason:%s\n", taos_errstr(pRes));
-    return -1;
+    goto END;
   }
   taos_free_result(pRes);
 
   pRes = taos_query(pConn, "create table tmqdb.ctb1 using tmqdb.stb tags(1, 'subtable1')");
   if (taos_errno(pRes) != 0) {
     printf("failed to create super table ctb1, reason:%s\n", taos_errstr(pRes));
-    return -1;
+    goto END;
   }
   taos_free_result(pRes);
 
   pRes = taos_query(pConn, "create table tmqdb.ctb2 using tmqdb.stb tags(2, 'subtable2')");
   if (taos_errno(pRes) != 0) {
     printf("failed to create super table ctb2, reason:%s\n", taos_errstr(pRes));
-    return -1;
+    goto END;
   }
   taos_free_result(pRes);
 
   pRes = taos_query(pConn, "create table tmqdb.ctb3 using tmqdb.stb tags(3, 'subtable3')");
   if (taos_errno(pRes) != 0) {
     printf("failed to create super table ctb3, reason:%s\n", taos_errstr(pRes));
-    return -1;
+    goto END;
   }
   taos_free_result(pRes);
 
@@ -126,33 +124,37 @@ static int32_t init_env() {
   pRes = taos_query(pConn, "insert into tmqdb.ctb0 values(now, 0, 0, 'a0')(now+1s, 0, 0, 'a00')");
   if (taos_errno(pRes) != 0) {
     printf("failed to insert into ctb0, reason:%s\n", taos_errstr(pRes));
-    return -1;
+    goto END;
   }
   taos_free_result(pRes);
 
   pRes = taos_query(pConn, "insert into tmqdb.ctb1 values(now, 1, 1, 'a1')(now+1s, 11, 11, 'a11')");
   if (taos_errno(pRes) != 0) {
     printf("failed to insert into ctb0, reason:%s\n", taos_errstr(pRes));
-    return -1;
+    goto END;
   }
   taos_free_result(pRes);
 
   pRes = taos_query(pConn, "insert into tmqdb.ctb2 values(now, 2, 2, 'a1')(now+1s, 22, 22, 'a22')");
   if (taos_errno(pRes) != 0) {
     printf("failed to insert into ctb0, reason:%s\n", taos_errstr(pRes));
-    return -1;
+    goto END;
   }
   taos_free_result(pRes);
 
   pRes = taos_query(pConn, "insert into tmqdb.ctb3 values(now, 3, 3, 'a1')(now+1s, 33, 33, 'a33')");
   if (taos_errno(pRes) != 0) {
     printf("failed to insert into ctb0, reason:%s\n", taos_errstr(pRes));
-    return -1;
+    goto END;
   }
   taos_free_result(pRes);
-
   taos_close(pConn);
   return 0;
+
+END:
+  taos_free_result(pRes);
+  taos_close(pConn);
+  return -1;
 }
 
 int32_t create_topic() {
diff --git a/source/client/src/clientTmq.c b/source/client/src/clientTmq.c
index 350ecdd373..c63ddea25d 100644
--- a/source/client/src/clientTmq.c
+++ b/source/client/src/clientTmq.c
@@ -438,6 +438,7 @@ int32_t tmqCommitCb(void* param, SDataBuf* pBuf, int32_t code) {
 
   taosMemoryFree(pParam->pOffset);
   taosMemoryFree(pBuf->pData);
+  taosMemoryFree(pBuf->pEpSet);
 
   /*tscDebug("receive offset commit cb of %s on vgId:%d, offset is %" PRId64, pParam->pOffset->subKey, pParam->->vgId,
    * pOffset->version);*/
@@ -724,7 +725,10 @@ void tmqAssignDelayedReportTask(void* param, void* tmrId) {
 }
 
 int32_t tmqHbCb(void* param, SDataBuf* pMsg, int32_t code) {
-  if (pMsg && pMsg->pData) taosMemoryFree(pMsg->pData);
+  if (pMsg) {
+    taosMemoryFree(pMsg->pData);
+    taosMemoryFree(pMsg->pEpSet);
+  }
   return 0;
 }
 
@@ -869,6 +873,8 @@ void tmqClearUnhandleMsg(tmq_t* tmq) {
 int32_t tmqSubscribeCb(void* param, SDataBuf* pMsg, int32_t code) {
   SMqSubscribeCbParam* pParam = (SMqSubscribeCbParam*)param;
   pParam->rspErr = code;
+
+  taosMemoryFree(pMsg->pEpSet);
   tsem_post(&pParam->rspSem);
   return 0;
 }
@@ -1166,6 +1172,8 @@ int32_t tmqPollCb(void* param, SDataBuf* pMsg, int32_t code) {
   if (code != 0) {
     tscWarn("msg discard from vgId:%d, epoch %d, since %s", vgId, epoch, terrstr());
     if (pMsg->pData) taosMemoryFree(pMsg->pData);
+    if (pMsg->pEpSet) taosMemoryFree(pMsg->pEpSet);
+
     if (code == TSDB_CODE_TMQ_CONSUMER_MISMATCH) {
       atomic_store_8(&tmq->status, TMQ_CONSUMER_STATUS__RECOVER);
       goto CREATE_MSG_FAIL;
@@ -1365,6 +1373,7 @@ int32_t tmqAskEpCb(void* param, SDataBuf* pMsg, int32_t code) {
       taosMemoryFree(pParam);
     }
     taosMemoryFree(pMsg->pData);
+    taosMemoryFree(pMsg->pEpSet);
     terrno = TSDB_CODE_TMQ_CONSUMER_CLOSED;
     return -1;
   }
@@ -1416,6 +1425,8 @@ END:
   } else {
     taosMemoryFree(pParam);
   }
+
+  taosMemoryFree(pMsg->pEpSet);
   taosMemoryFree(pMsg->pData);
   return code;
 }
diff --git a/source/libs/scheduler/src/schRemote.c b/source/libs/scheduler/src/schRemote.c
index c23b461b47..b6de9383d7 100644
--- a/source/libs/scheduler/src/schRemote.c
+++ b/source/libs/scheduler/src/schRemote.c
@@ -456,6 +456,7 @@ int32_t schHandleLinkBrokenCallback(void *param, SDataBuf *pMsg, int32_t code) {
 
   if (head->isHbParam) {
     taosMemoryFree(pMsg->pData);
+    taosMemoryFree(pMsg->pEpSet);
 
     SSchHbCallbackParam *hbParam = (SSchHbCallbackParam *)param;
     SSchTrans            trans = {.pTrans = hbParam->pTrans, .pHandle = NULL};
diff --git a/source/libs/transport/src/transCli.c b/source/libs/transport/src/transCli.c
index 6ad126162e..d144a76eb0 100644
--- a/source/libs/transport/src/transCli.c
+++ b/source/libs/transport/src/transCli.c
@@ -599,6 +599,10 @@ static int32_t allocConnRef(SCliConn* conn, bool update) {
   exh->pThrd = conn->hostThrd;
   exh->refId = transAddExHandle(transGetRefMgt(), exh);
   conn->refId = exh->refId;
+
+  if (conn->refId == -1) {
+    taosMemoryFree(exh);
+  }
   return 0;
 }