ifndef-SleePy commented on a change in pull request #6770:  [FLINK-10002] 
[Webfrontend] WebUI shows jm/tm logs more friendly.
URL: https://github.com/apache/flink/pull/6770#discussion_r226523853
 
 

 ##########
 File path: 
flink-runtime/src/main/java/org/apache/flink/runtime/rest/handler/legacy/files/LogFileHandlerSpecification.java
 ##########
 @@ -25,12 +25,18 @@
  * Rest handler specification for the log file of the main cluster component.
  */
 public class LogFileHandlerSpecification implements RestHandlerSpecification {
-
-       private static final LogFileHandlerSpecification INSTANCE = new 
LogFileHandlerSpecification();
-
        private static final String URL = "/jobmanager/log";
+       private static final String URL_WITH_RANGE = "/jobmanager/log/:range";
+       private static final String URL_WITH_FILENAME_AND_RANGE = 
"/jobmanager/logs/:filename/:range";
 
-       private LogFileHandlerSpecification() {}
+       private static final LogFileHandlerSpecification INSTANCE = new 
LogFileHandlerSpecification(URL);
 
 Review comment:
   Singleton with multiple instances is not a good idea anyway.

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