websocket服务增加调试日志

themis-exam/src/main/java/com/qmth/themis/exam/websocket/WebSocketOeServer.java

@@ -204,6 +204,9 @@ public class WebSocketOeServer implements Concurrently {
                 }
             } catch (Exception e) {
                 log.error("请求出错", e);
+                if(log.isInfoEnabled()){
+                    log.info("incoming message:" + message);
+                }
             }
         }
     }