diff --git a/src/idempotency/client/rpc_wrapper.h b/src/idempotency/client/rpc_wrapper.h
index 432ab66..89c233d 100644
--- a/src/idempotency/client/rpc_wrapper.h
+++ b/src/idempotency/client/rpc_wrapper.h
@@ -79,8 +79,9 @@
                             connection_params->channel) == 0) \
                 { \
                     if ((conn_result=sf_proto_rebind_idempotency_channel( \
-                                conn, connection_params->channel->id, \
-                                connection_params->channel->key,      \
+                                conn, (conn_manager)->module_name, \
+                                connection_params->channel->id,  \
+                                connection_params->channel->key, \
                                 client_ctx->common_cfg.network_timeout)) == 0)   \
                     { \
                         continue; \
diff --git a/src/sf_configs.h b/src/sf_configs.h
index a0a71ee..2fdf572 100644
--- a/src/sf_configs.h
+++ b/src/sf_configs.h
@@ -104,14 +104,15 @@ static inline const char *sf_get_quorum_caption(
 }
 
 static inline bool sf_election_quorum_check(const SFElectionQuorum quorum,
-        const int total_count, const int active_count)
+        const bool vote_node_enabled, const int total_count,
+        const int active_count)
 {
     switch (quorum) {
         case sf_election_quorum_any:
             return active_count > 0;
         case sf_election_quorum_auto:
-            if (total_count % 2 == 0) {  //same as sf_election_quorum_any
-                return active_count > 0;
+            if (total_count % 2 == 0 && !vote_node_enabled) {
+                return active_count > 0;  //same as sf_election_quorum_any
             }
             //continue
         case sf_election_quorum_majority:
diff --git a/src/sf_connection_manager.c b/src/sf_connection_manager.c
index d85577e..bb9da7e 100644
--- a/src/sf_connection_manager.c
+++ b/src/sf_connection_manager.c
@@ -37,7 +37,8 @@ static int get_group_servers(SFConnectionManager *cm,
 static ConnectionInfo *get_spec_connection(SFConnectionManager *cm,
         const ConnectionInfo *target, int *err_no)
 {
-    return conn_pool_get_connection(&cm->cpool, target, err_no);
+    return conn_pool_get_connection_ex(&cm->cpool,
+            target, cm->module_name, err_no);
 }
 
 static ConnectionInfo *make_connection(SFConnectionManager *cm,
@@ -419,8 +420,8 @@ static ConnectionInfo *get_leader_connection(SFConnectionManager *cm,
                 break;
             }
 
-            if ((*err_no=sf_proto_get_leader(conn, cm->common_cfg->
-                    network_timeout, &leader)) != 0)
+            if ((*err_no=sf_proto_get_leader(conn, cm->module_name, cm->
+                            common_cfg->network_timeout, &leader)) != 0)
             {
                 close_connection(cm, conn);
                 break;
@@ -472,7 +473,7 @@ int sf_cm_validate_connection_callback(ConnectionInfo *conn, void *args)
     if ((result=sf_active_test(conn, &response, cm->common_cfg->
                     network_timeout)) != 0)
     {
-        sf_log_network_error(&response, conn, result);
+        sf_log_network_error(&response, conn, cm->module_name, result);
     }
 
     return result;
@@ -696,8 +697,8 @@ static int do_get_group_servers(SFConnectionManager *cm,
     sarray.alloc = MAX_GROUP_SERVER_COUNT;
     sarray.count = 0;
     sarray.servers = fixed_servers;
-    if ((result=sf_proto_get_group_servers(conn, cm->common_cfg->
-                    network_timeout, group->id, &sarray)) != 0)
+    if ((result=sf_proto_get_group_servers(conn, cm->module_name, cm->
+                    common_cfg->network_timeout, group->id, &sarray)) != 0)
     {
         return result;
     }
diff --git a/src/sf_proto.c b/src/sf_proto.c
index d4b9420..ffe049c 100644
--- a/src/sf_proto.c
+++ b/src/sf_proto.c
@@ -458,7 +458,8 @@ int sf_proto_deal_ack(struct fast_task_info *task,
 }
 
 int sf_proto_rebind_idempotency_channel(ConnectionInfo *conn,
-        const uint32_t channel_id, const int key, const int network_timeout)
+        const char *service_name, const uint32_t channel_id,
+        const int key, const int network_timeout)
 {
     char out_buff[sizeof(SFCommonProtoHeader) +
         sizeof(SFProtoRebindChannelReq)];
@@ -478,15 +479,15 @@ int sf_proto_rebind_idempotency_channel(ConnectionInfo *conn,
                     sizeof(out_buff), &response, network_timeout,
                     SF_SERVICE_PROTO_REBIND_CHANNEL_RESP)) != 0)
     {
-        sf_log_network_error(&response, conn, result);
+        sf_log_network_error(&response, conn, service_name, result);
     }
 
     return result;
 }
 
 int sf_proto_get_group_servers(ConnectionInfo *conn,
-        const int network_timeout, const int group_id,
-        SFGroupServerArray *sarray)
+        const char *service_name, const int network_timeout,
+        const int group_id, SFGroupServerArray *sarray)
 {
     char out_buff[sizeof(SFCommonProtoHeader) +
         sizeof(SFProtoGetGroupServersReq)];
@@ -513,7 +514,7 @@ int sf_proto_get_group_servers(ConnectionInfo *conn,
                     SF_SERVICE_PROTO_GET_GROUP_SERVERS_RESP, in_buff,
                     sizeof(in_buff), &body_len)) != 0)
     {
-        sf_log_network_error(&response, conn, result);
+        sf_log_network_error(&response, conn, service_name, result);
         return result;
     }
 
@@ -553,9 +554,8 @@ int sf_proto_get_group_servers(ConnectionInfo *conn,
     return 0;
 }
 
-int sf_proto_get_leader(ConnectionInfo *conn,
-        const int network_timeout,
-        SFClientServerEntry *leader)
+int sf_proto_get_leader(ConnectionInfo *conn, const char *service_name,
+        const int network_timeout, SFClientServerEntry *leader)
 {
     int result;
     SFCommonProtoHeader *header;
@@ -571,7 +571,7 @@ int sf_proto_get_leader(ConnectionInfo *conn,
                     SF_SERVICE_PROTO_GET_LEADER_RESP, (char *)&server_resp,
                     sizeof(SFProtoGetServerResp))) != 0)
     {
-        sf_log_network_error(&response, conn, result);
+        sf_log_network_error(&response, conn, service_name, result);
     } else {
         leader->server_id = buff2int(server_resp.server_id);
         memcpy(leader->conn.ip_addr, server_resp.ip_addr, IP_ADDRESS_SIZE);
diff --git a/src/sf_proto.h b/src/sf_proto.h
index d07c030..be31a1a 100644
--- a/src/sf_proto.h
+++ b/src/sf_proto.h
@@ -297,41 +297,45 @@ static inline void sf_proto_init_task_context(struct fast_task_info *task,
 }
 
 static inline void sf_log_network_error_ex1(SFResponseInfo *response,
-        const ConnectionInfo *conn, const int result,
-        const int log_level, const char *file, const int line)
+        const ConnectionInfo *conn, const char *service_name,
+        const int result, const int log_level,
+        const char *file, const int line)
 {
     if (response->error.length > 0) {
-        log_it_ex(&g_log_context, log_level,
-                "file: %s, line: %d, "
-                "server %s:%u response message: %s",
-                file, line, conn->ip_addr, conn->port,
+        log_it_ex(&g_log_context, log_level, "file: %s, line: %d, "
+                "%s%sserver %s:%u response message: %s", file, line,
+                (service_name != NULL ? service_name : ""),
+                (service_name != NULL ? " ": ""),
+                conn->ip_addr, conn->port,
                 response->error.message);
     } else {
-        log_it_ex(&g_log_context, log_level,
-                "file: %s, line: %d, "
-                "communicate with server %s:%u fail, "
+        log_it_ex(&g_log_context, log_level, "file: %s, line: %d, "
+                "communicate with %s%sserver %s:%u fail, "
                 "errno: %d, error info: %s", file, line,
+                (service_name != NULL ? service_name : ""),
+                (service_name != NULL ? " ": ""),
                 conn->ip_addr, conn->port,
                 result, STRERROR(result));
     }
 }
 
-#define sf_log_network_error_ex(response, conn, result, log_level) \
-    sf_log_network_error_ex1(response, conn, result, \
-            log_level, __FILE__, __LINE__)
+#define sf_log_network_error_ex(response, conn, \
+        service_name, result, log_level) \
+    sf_log_network_error_ex1(response, conn, service_name, \
+            result, log_level, __FILE__, __LINE__)
 
-#define sf_log_network_error(response, conn, result) \
-    sf_log_network_error_ex1(response, conn, result, \
+#define sf_log_network_error(response, conn, service_name, result) \
+    sf_log_network_error_ex1(response, conn, service_name, result, \
             LOG_ERR, __FILE__, __LINE__)
 
-#define sf_log_network_error_for_update(response, conn, result)  \
-        sf_log_network_error_ex(response, conn, result,         \
+#define sf_log_network_error_for_update(response, conn, service_name, result) \
+        sf_log_network_error_ex(response, conn, service_name, result,         \
                 (result == SF_RETRIABLE_ERROR_CHANNEL_INVALID) ? \
                 LOG_DEBUG : LOG_ERR)
 
-#define sf_log_network_error_for_delete(response, \
-        conn, result, enoent_log_level)  \
-        sf_log_network_error_ex(response, conn, result,          \
+#define sf_log_network_error_for_delete(response, conn, \
+        service_name, result, enoent_log_level)  \
+        sf_log_network_error_ex(response, conn, service_name, result,  \
                 (result == SF_RETRIABLE_ERROR_CHANNEL_INVALID) ? \
                 LOG_DEBUG : ((result == ENOENT || result == ENODATA) ? \
                     enoent_log_level : LOG_ERR))
@@ -558,15 +562,15 @@ int sf_proto_deal_ack(struct fast_task_info *task,
         SFRequestInfo *request, SFResponseInfo *response);
 
 int sf_proto_rebind_idempotency_channel(ConnectionInfo *conn,
-        const uint32_t channel_id, const int key, const int network_timeout);
+        const char *service_name, const uint32_t channel_id,
+        const int key, const int network_timeout);
 
 int sf_proto_get_group_servers(ConnectionInfo *conn,
-        const int network_timeout, const int group_id,
-        SFGroupServerArray *sarray);
+        const char *service_name, const int network_timeout,
+        const int group_id, SFGroupServerArray *sarray);
 
-int sf_proto_get_leader(ConnectionInfo *conn,
-        const int network_timeout,
-        SFClientServerEntry *leader);
+int sf_proto_get_leader(ConnectionInfo *conn, const char *service_name,
+        const int network_timeout, SFClientServerEntry *leader);
 
 static inline void sf_proto_get_server_status_pack(
         const SFGetServerStatusRequest *r,