diff --git a/include/libs/qcom/query.h b/include/libs/qcom/query.h
index 3f11d2a218..5b640dce92 100644
--- a/include/libs/qcom/query.h
+++ b/include/libs/qcom/query.h
@@ -268,7 +268,7 @@ extern int32_t (*queryProcessMsgRsp[TDMT_MAX])(void* output, char* msg, int32_t
   ((_code) == TSDB_CODE_SYN_NOT_LEADER || (_code) == TSDB_CODE_SYN_RESTORING || (_code) == TSDB_CODE_SYN_INTERNAL_ERROR)
 #define SYNC_OTHER_LEADER_REDIRECT_ERROR(_code) ((_code) == TSDB_CODE_MNODE_NOT_FOUND)
 
-#define NO_RET_REDIRECT_ERROR(_code) ((_code) == TSDB_CODE_RPC_BROKEN_LINK || (_code) == TSDB_CODE_RPC_NETWORK_UNAVAIL)
+#define NO_RET_REDIRECT_ERROR(_code) ((_code) == TSDB_CODE_RPC_BROKEN_LINK || (_code) == TSDB_CODE_RPC_NETWORK_UNAVAIL || (_code) == TSDB_CODE_RPC_SOMENODE_NOT_CONNECTED)
 
 #define NEED_REDIRECT_ERROR(_code)                                              \
   (NO_RET_REDIRECT_ERROR(_code) || SYNC_UNKNOWN_LEADER_REDIRECT_ERROR(_code) || \
diff --git a/include/util/taoserror.h b/include/util/taoserror.h
index 2d7b15ebda..3823252de6 100644
--- a/include/util/taoserror.h
+++ b/include/util/taoserror.h
@@ -65,6 +65,8 @@ int32_t* taosGetErrno();
 #define TSDB_CODE_RPC_PORT_EADDRINUSE           TAOS_DEF_ERROR_CODE(0, 0x0017) //
 #define TSDB_CODE_RPC_BROKEN_LINK               TAOS_DEF_ERROR_CODE(0, 0x0018) //
 #define TSDB_CODE_RPC_TIMEOUT                   TAOS_DEF_ERROR_CODE(0, 0x0019) //
+#define TSDB_CODE_RPC_SOMENODE_NOT_CONNECTED    TAOS_DEF_ERROR_CODE(0, 0x0020) // "Vgroup could not be connected"
+#define TSDB_CODE_RPC_SOMENODE_BROKEN_LINK      TAOS_DEF_ERROR_CODE(0, 0x0021) // 
 
 //common & util
 #define TSDB_CODE_OPS_NOT_SUPPORT               TAOS_DEF_ERROR_CODE(0, 0x0100) //
diff --git a/source/client/src/clientImpl.c b/source/client/src/clientImpl.c
index 08a2477e5f..f36036fd0a 100644
--- a/source/client/src/clientImpl.c
+++ b/source/client/src/clientImpl.c
@@ -1430,6 +1430,21 @@ void processMsgFromServer(void* parent, SRpcMsg* pMsg, SEpSet* pEpSet) {
     memcpy((void*)tEpSet, (void*)pEpSet, sizeof(SEpSet));
   }
 
+  // pMsg is response msg
+  if (pMsg->msgType == TDMT_MND_CONNECT + 1) {
+    // restore origin code
+    if (pMsg->code == TSDB_CODE_RPC_SOMENODE_NOT_CONNECTED) {
+      pMsg->code = TSDB_CODE_RPC_NETWORK_UNAVAIL;
+    } else if (pMsg->code == TSDB_CODE_RPC_SOMENODE_BROKEN_LINK) {
+      pMsg->code = TSDB_CODE_RPC_BROKEN_LINK;
+    }
+  } else {
+    // uniform to one error code: TSDB_CODE_RPC_SOMENODE_NOT_CONNECTED
+    if (pMsg->code == TSDB_CODE_RPC_SOMENODE_BROKEN_LINK) {
+      pMsg->code = TSDB_CODE_RPC_SOMENODE_NOT_CONNECTED;
+    }
+  }
+
   AsyncArg* arg = taosMemoryCalloc(1, sizeof(AsyncArg));
   arg->msg = *pMsg;
   arg->pEpset = tEpSet;
diff --git a/source/dnode/mgmt/node_mgmt/src/dmTransport.c b/source/dnode/mgmt/node_mgmt/src/dmTransport.c
index f11378f84c..756f97d1d0 100644
--- a/source/dnode/mgmt/node_mgmt/src/dmTransport.c
+++ b/source/dnode/mgmt/node_mgmt/src/dmTransport.c
@@ -248,6 +248,7 @@ static inline void dmReleaseHandle(SRpcHandleInfo *pHandle, int8_t type) { rpcRe
 
 static bool rpcRfp(int32_t code, tmsg_t msgType) {
   if (code == TSDB_CODE_RPC_NETWORK_UNAVAIL || code == TSDB_CODE_RPC_BROKEN_LINK || code == TSDB_CODE_MNODE_NOT_FOUND ||
+      code == TSDB_CODE_RPC_SOMENODE_NOT_CONNECTED ||
       code == TSDB_CODE_SYN_NOT_LEADER || code == TSDB_CODE_SYN_RESTORING || code == TSDB_CODE_VND_STOPPED ||
       code == TSDB_CODE_APP_IS_STARTING || code == TSDB_CODE_APP_IS_STOPPING) {
     if (msgType == TDMT_SCH_QUERY || msgType == TDMT_SCH_MERGE_QUERY || msgType == TDMT_SCH_FETCH ||
diff --git a/source/dnode/mnode/impl/src/mndTrans.c b/source/dnode/mnode/impl/src/mndTrans.c
index 67d3f7e119..718fc5c73f 100644
--- a/source/dnode/mnode/impl/src/mndTrans.c
+++ b/source/dnode/mnode/impl/src/mndTrans.c
@@ -957,7 +957,7 @@ static void mndTransSendRpcRsp(SMnode *pMnode, STrans *pTrans) {
   for (int32_t i = 0; i < size; ++i) {
     SRpcHandleInfo *pInfo = taosArrayGet(pTrans->pRpcArray, i);
     if (pInfo->handle != NULL) {
-      if (code == TSDB_CODE_RPC_NETWORK_UNAVAIL) {
+      if (code == TSDB_CODE_RPC_NETWORK_UNAVAIL || code == TSDB_CODE_RPC_SOMENODE_NOT_CONNECTED) {
         code = TSDB_CODE_MND_TRANS_NETWORK_UNAVAILL;
       }
       if (code == TSDB_CODE_SYN_TIMEOUT) {
diff --git a/source/libs/function/src/udfd.c b/source/libs/function/src/udfd.c
index 40c75ce6ba..6c88e4d5c8 100644
--- a/source/libs/function/src/udfd.c
+++ b/source/libs/function/src/udfd.c
@@ -606,6 +606,7 @@ int32_t udfdLoadUdf(char *udfName, SUdf *udf) {
 }
 static bool udfdRpcRfp(int32_t code, tmsg_t msgType) {
   if (code == TSDB_CODE_RPC_NETWORK_UNAVAIL || code == TSDB_CODE_RPC_BROKEN_LINK || code == TSDB_CODE_SYN_NOT_LEADER ||
+      code == TSDB_CODE_RPC_SOMENODE_NOT_CONNECTED ||
       code == TSDB_CODE_SYN_RESTORING || code == TSDB_CODE_MNODE_NOT_FOUND || code == TSDB_CODE_APP_IS_STARTING ||
       code == TSDB_CODE_APP_IS_STOPPING) {
     if (msgType == TDMT_SCH_QUERY || msgType == TDMT_SCH_MERGE_QUERY || msgType == TDMT_SCH_FETCH ||
diff --git a/source/libs/scheduler/inc/schInt.h b/source/libs/scheduler/inc/schInt.h
index 48df7e36a3..e8216fcd7c 100644
--- a/source/libs/scheduler/inc/schInt.h
+++ b/source/libs/scheduler/inc/schInt.h
@@ -375,7 +375,7 @@ extern SSchedulerMgmt schMgmt;
 #define SCH_JOB_NEED_WAIT(_job)  (!SCH_IS_QUERY_JOB(_job))
 #define SCH_JOB_NEED_DROP(_job)  (SCH_IS_QUERY_JOB(_job))
 #define SCH_IS_EXPLAIN_JOB(_job) (EXPLAIN_MODE_ANALYZE == (_job)->attr.explainMode)
-#define SCH_NETWORK_ERR(_code)   ((_code) == TSDB_CODE_RPC_BROKEN_LINK || (_code) == TSDB_CODE_RPC_NETWORK_UNAVAIL)
+#define SCH_NETWORK_ERR(_code)   ((_code) == TSDB_CODE_RPC_BROKEN_LINK || (_code) == TSDB_CODE_RPC_NETWORK_UNAVAIL || (_code) == TSDB_CODE_RPC_SOMENODE_NOT_CONNECTED)
 #define SCH_MERGE_TASK_NETWORK_ERR(_task, _code, _len) \
   (SCH_NETWORK_ERR(_code) && (((_len) > 0) || (!SCH_IS_DATA_BIND_TASK(_task)) || (_task)->redirectCtx.inRedirect))
 #define SCH_REDIRECT_MSGTYPE(_msgType)                                                                         \
diff --git a/source/libs/transport/src/transCli.c b/source/libs/transport/src/transCli.c
index d144a76eb0..1dc79e0cfb 100644
--- a/source/libs/transport/src/transCli.c
+++ b/source/libs/transport/src/transCli.c
@@ -1665,11 +1665,20 @@ int cliAppCb(SCliConn* pConn, STransMsg* pResp, SCliMsg* pMsg) {
   if (pCtx->retryCode != TSDB_CODE_SUCCESS) {
     int32_t code = pResp->code;
     // return internal code app
-    if (code == TSDB_CODE_RPC_NETWORK_UNAVAIL || code == TSDB_CODE_RPC_BROKEN_LINK) {
+    if (code == TSDB_CODE_RPC_NETWORK_UNAVAIL || code == TSDB_CODE_RPC_BROKEN_LINK || code == TSDB_CODE_RPC_SOMENODE_NOT_CONNECTED) {
       pResp->code = pCtx->retryCode;
     }
   }
 
+  // check whole vnodes is offline on this vgroup
+  if (pCtx->epsetRetryCnt >= pCtx->epSet.numOfEps || pCtx->retryStep > 0) {
+    if (pResp->code == TSDB_CODE_RPC_NETWORK_UNAVAIL) {
+      pResp->code = TSDB_CODE_RPC_SOMENODE_NOT_CONNECTED;
+    } else if (pResp->code == TSDB_CODE_RPC_BROKEN_LINK) {
+      pResp->code = TSDB_CODE_RPC_SOMENODE_BROKEN_LINK;
+    }
+  }
+
   STraceId* trace = &pResp->info.traceId;
   bool      hasEpSet = cliTryExtractEpSet(pResp, &pCtx->epSet);
   if (hasEpSet) {
diff --git a/source/util/src/terror.c b/source/util/src/terror.c
index e59b1daa05..2d7121e2ae 100644
--- a/source/util/src/terror.c
+++ b/source/util/src/terror.c
@@ -51,6 +51,7 @@ TAOS_DEFINE_ERROR(TSDB_CODE_RPC_FQDN_ERROR,               "Unable to resolve FQD
 TAOS_DEFINE_ERROR(TSDB_CODE_RPC_PORT_EADDRINUSE,          "Port already in use")
 TAOS_DEFINE_ERROR(TSDB_CODE_RPC_BROKEN_LINK,              "Conn is broken")
 TAOS_DEFINE_ERROR(TSDB_CODE_RPC_TIMEOUT,                  "Conn read timeout")
+TAOS_DEFINE_ERROR(TSDB_CODE_RPC_SOMENODE_NOT_CONNECTED,   "some vnode/qnode/mnode(s) out of service")
 
 //common & util
 TAOS_DEFINE_ERROR(TSDB_CODE_TIME_UNSYNCED,                "Client and server's time is not synchronized")