diff --git a/src/client/inc/tsclient.h b/src/client/inc/tsclient.h
index e8b03c0db9665ad9ddd8d92af9f2237b9dc7e7cf..c9702ad1fc7e83e1d7473ee040bafc33e6277c87 100644
--- a/src/client/inc/tsclient.h
+++ b/src/client/inc/tsclient.h
@@ -299,7 +299,6 @@ typedef struct {
 
 typedef struct {
   char         key[512]; 
-  SRpcCorEpSet *tscCorMgmtEpSet;
   void         *pDnodeConn; 
 } SRpcObj;
 
@@ -319,6 +318,7 @@ typedef struct STscObj {
   struct SSqlObj *   sqlList;
   struct SSqlStream *streamList;
   SRpcObj           *pRpcObj;
+  SRpcCorEpSet      *tscCorMgmtEpSet;
   pthread_mutex_t    mutex;
   int32_t            numOfObj; // number of sqlObj from this tscObj
 } STscObj;
@@ -396,7 +396,7 @@ typedef struct SSqlStream {
 void tscSetStreamDestTable(SSqlStream* pStream, const char* dstTable);
 
 
-int  tscAcquireRpc(const char *key, const char *user, const char *secret, SRpcCorEpSet *corMgmtEpSet, void **pRpcObj);
+int  tscAcquireRpc(const char *key, const char *user, const char *secret,void **pRpcObj);
 void tscReleaseRpc(void *param);
 void tscInitMsgsFp();
 
diff --git a/src/client/src/tscServer.c b/src/client/src/tscServer.c
index 381ee159124c11c9e4f3bfd3312e60320ce67a05..a81e47f3ad6f0d040114961ad5030067df6624ee 100644
--- a/src/client/src/tscServer.c
+++ b/src/client/src/tscServer.c
@@ -69,7 +69,7 @@ static void tscSetDnodeEpSet(SRpcEpSet* pEpSet, SVgroupInfo* pVgroupInfo) {
 }
 
 static void tscDumpMgmtEpSet(SSqlObj *pSql) {
-  SRpcCorEpSet *pCorEpSet = pSql->pTscObj->pRpcObj->tscCorMgmtEpSet;
+  SRpcCorEpSet *pCorEpSet = pSql->pTscObj->tscCorMgmtEpSet;
   taosCorBeginRead(&pCorEpSet->version);
   pSql->epSet = pCorEpSet->epSet;
   taosCorEndRead(&pCorEpSet->version);
@@ -94,7 +94,7 @@ bool tscEpSetIsEqual(SRpcEpSet *s1, SRpcEpSet *s2) {
 
 void tscUpdateMgmtEpSet(SSqlObj *pSql, SRpcEpSet *pEpSet) {
   // no need to update if equal
-  SRpcCorEpSet *pCorEpSet = pSql->pTscObj->pRpcObj->tscCorMgmtEpSet;
+  SRpcCorEpSet *pCorEpSet = pSql->pTscObj->tscCorMgmtEpSet;
   taosCorBeginWrite(&pCorEpSet->version);
   pCorEpSet->epSet = *pEpSet;
   taosCorEndWrite(&pCorEpSet->version);
@@ -158,7 +158,7 @@ void tscProcessHeartBeatRsp(void *param, TAOS_RES *tres, int code) {
     if (epSet->numOfEps > 0) {
       tscEpSetHtons(epSet);
 
-      //SRpcCorEpSet *pCorEpSet = pSql->pTscObj->pRpcObj->tscCorMgmtEpSet;
+      //SRpcCorEpSet *pCorEpSet = pSql->pTscObj->tscCorMgmtEpSet;
       //if (!tscEpSetIsEqual(&pCorEpSet->epSet, epSet)) {
       //  tscTrace("%p updating epset: numOfEps: %d, inUse: %d", pSql, epSet->numOfEps, epSet->inUse);
       //  for (int8_t i = 0; i < epSet->numOfEps; i++) {
diff --git a/src/client/src/tscSql.c b/src/client/src/tscSql.c
index 04e7e764f40efcfcfe78bcedfa2e7b4a2f653166..448eea16bf5a529f489b59ced9a9f32c513338eb 100644
--- a/src/client/src/tscSql.c
+++ b/src/client/src/tscSql.c
@@ -94,7 +94,7 @@ static SSqlObj *taosConnectImpl(const char *ip, const char *user, const char *pa
   snprintf(rpcKey, sizeof(rpcKey), "%s:%s:%s:%d", user, pass, ip, port);
  
   void *pRpcObj = NULL;
-  if (tscAcquireRpc(rpcKey, user, secretEncrypt,&corMgmtEpSet, &pRpcObj) != 0) {
+  if (tscAcquireRpc(rpcKey, user, secretEncrypt, &pRpcObj) != 0) {
     terrno = TSDB_CODE_RPC_NETWORK_UNAVAIL;
     return NULL;
   }
@@ -105,6 +105,16 @@ static SSqlObj *taosConnectImpl(const char *ip, const char *user, const char *pa
     tscReleaseRpc(pRpcObj);
     return NULL;
   }
+
+  pObj->tscCorMgmtEpSet = malloc(sizeof(SRpcCorEpSet));
+  if (pObj->tscCorMgmtEpSet == NULL) {
+    terrno = TSDB_CODE_TSC_OUT_OF_MEMORY;
+    tscReleaseRpc(pRpcObj);
+    free(pObj);
+    return NULL;
+  }
+  memcpy(pObj->tscCorMgmtEpSet, &corMgmtEpSet, sizeof(corMgmtEpSet));
+  
   pObj->signature = pObj;
   pObj->pRpcObj = (SRpcObj *)pRpcObj;
   tstrncpy(pObj->user, user, sizeof(pObj->user));
diff --git a/src/client/src/tscSystem.c b/src/client/src/tscSystem.c
index bb10f9fae9284ddbc45a9b7c57b777197be6f881..fe1c45bd393938cfd9a77db97169dde2ef6412de 100644
--- a/src/client/src/tscSystem.c
+++ b/src/client/src/tscSystem.c
@@ -58,7 +58,6 @@ void tscFreeRpcObj(void *param) {
   SRpcObj *pRpcObj = (SRpcObj *)(param);
   tscDebug("free rpcObj:%p and free pDnodeConn: %p", pRpcObj, pRpcObj->pDnodeConn);
   rpcClose(pRpcObj->pDnodeConn);
-  tfree(pRpcObj->tscCorMgmtEpSet);
 }
 
 void tscReleaseRpc(void *param)  {
@@ -70,7 +69,7 @@ void tscReleaseRpc(void *param)  {
   pthread_mutex_unlock(&rpcObjMutex);
 } 
 
-int32_t tscAcquireRpc(const char *key, const char *user, const char *secretEncrypt, SRpcCorEpSet *corMgmtEpSet, void **ppRpcObj) {
+int32_t tscAcquireRpc(const char *key, const char *user, const char *secretEncrypt, void **ppRpcObj) {
   pthread_mutex_lock(&rpcObjMutex);
 
   SRpcObj *pRpcObj = (SRpcObj *)taosCacheAcquireByKey(tscRpcCache, key, strlen(key));
@@ -109,13 +108,6 @@ int32_t tscAcquireRpc(const char *key, const char *user, const char *secretEncry
     pthread_mutex_unlock(&rpcObjMutex);
     return -1;
   } 
-  pRpcObj->tscCorMgmtEpSet = malloc(sizeof(SRpcCorEpSet));
-  if (pRpcObj->tscCorMgmtEpSet == NULL) {
-    rpcClose(rpcObj.pDnodeConn);
-    pthread_mutex_unlock(&rpcObjMutex);
-    return -1;
-  }
-  memcpy(pRpcObj->tscCorMgmtEpSet, corMgmtEpSet, sizeof(*corMgmtEpSet));
 
   *ppRpcObj  = pRpcObj;
   pthread_mutex_unlock(&rpcObjMutex);
diff --git a/src/client/src/tscUtil.c b/src/client/src/tscUtil.c
index 756dc93098f770004cf6791a9f6480a4b2247416..c77d5e5764575f190457248a0f6d4b188915e4bd 100644
--- a/src/client/src/tscUtil.c
+++ b/src/client/src/tscUtil.c
@@ -897,6 +897,7 @@ void tscCloseTscObj(void *param) {
   pObj->signature = NULL;
   taosTmrStopA(&(pObj->pTimer));
 
+  tfree(pObj->tscCorMgmtEpSet);
   tscReleaseRpc(pObj->pRpcObj);
   pthread_mutex_destroy(&pObj->mutex);