diff --git a/server/share/etc/core.ini.in b/server/share/etc/core.ini.in
index 9a4b88c..9b7fcef 100644
--- a/server/share/etc/core.ini.in
+++ b/server/share/etc/core.ini.in
@@ -2,7 +2,7 @@
 
 [common]
 ; 'log-file' define the log file location. if not set, default locate
-; to $INSTDIR%/log/tpcore.log
+; to $INSTDIR%/data/log/tpcore.log
 ;log-file=/var/log/teleport/tpcore.log
 
 ; log-level can be 0 ~ 4, default value is 2.
@@ -18,7 +18,7 @@ log-level=2
 debug-mode=0
 
 ; 'replay-path' define the replay file location. if not set, default locate
-; to $INSTDIR%/data/replay/
+; to `$INSTDIR%/data/replay`
 ;replay-path=/var/lib/teleport/replay
 
 ; `web-server-rpc` is the rpc interface of web server.
@@ -28,9 +28,9 @@ web-server-rpc=http://127.0.0.1:7190/rpc
 
 [rpc]
 ; Request by web server. `bind-ip` should be the ip of core server. If web server and
-; core server running at the same machine, it should be 127.0.0.1.
+; core server running at the same machine, it should be `127.0.0.1`.
+; DO NOT FORGET update `common::core-server-rpc` in web.ini if you modified this setting. 
 bind-ip=127.0.0.1
-; DO NOT FORGET update `common::core-server-rpc` in web.ini if you modified this setting. 
 bind-port=52080
 
 [protocol-ssh]
diff --git a/server/tp_core/core/ts_web_rpc.cpp b/server/tp_core/core/ts_web_rpc.cpp
index f50f963..e4a01bb 100644
--- a/server/tp_core/core/ts_web_rpc.cpp
+++ b/server/tp_core/core/ts_web_rpc.cpp
@@ -49,12 +49,11 @@ int ts_web_rpc_get_conn_info(int conn_id, TS_CONNECT_INFO& info)
 	ex_astr body;
 	if (!ts_http_get(url, body))
 	{
-// 		EXLOGV("request `get_auth_info` from web return: ");
-// 		EXLOGV(body.c_str());
-// 		EXLOGV("\n");
+		EXLOGE("[core] get conn info from web-server failed: can not connect to web-server.\n");
 		return TPE_NETWORK;
 	}
 	if (body.length() == 0) {
+		EXLOGE("[core] get conn info from web-server failed: got nothing.\n");
 		return TPE_NETWORK;
 	}
 
diff --git a/server/www/teleport/webroot/app/controller/ops.py b/server/www/teleport/webroot/app/controller/ops.py
index fec6086..cf7a909 100644
--- a/server/www/teleport/webroot/app/controller/ops.py
+++ b/server/www/teleport/webroot/app/controller/ops.py
@@ -112,11 +112,13 @@ class DoGetSessionIDHandler(TPBaseJsonHandler):
             if 'protocol_sub_type' not in args:
                 return self.write_json(TPE_PARAM)
 
+            # 根据auth_id从数据库中取得此授权相关的用户、主机、账号三者详细信息
             auth_id = args['auth_id']
             protocol_sub_type = int(args['protocol_sub_type'])
             ops_auth, err = ops.get_auth(auth_id)
+            if err != TPE_OK:
+                return self.write_json(err)
 
-            # TODO: 根据auth_id从数据库中取得此授权相关的用户、主机、账号三者详细信息
             acc_id = ops_auth['a_id']
             host_id = ops_auth['h_id']
             user_id = ops_auth['u_id']
diff --git a/server/www/teleport/webroot/app/model/ops.py b/server/www/teleport/webroot/app/model/ops.py
index 154bee0..9cd3dac 100644
--- a/server/www/teleport/webroot/app/model/ops.py
+++ b/server/www/teleport/webroot/app/model/ops.py
@@ -556,6 +556,9 @@ def get_remotes(handler, sql_filter, sql_order, sql_limit):
     h_ids = []  # 涉及到的主机的ID列表
 
     db_ret = db.query(' '.join(sql))
+    if db_ret is None:
+        return TPE_OK, 0, 1, []
+
     for db_item in db_ret:
         item = AttrDict()
         for i in range(len(_f)):