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https://issues.apache.org/jira/browse/YARN-5271?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15666551#comment-15666551
 ] 

Wei-Chiu Chuang commented on YARN-5271:
---------------------------------------

Hi [~cheersyang] thanks for the patch.
While I think the fix itself is good, the unit test part fails to show 
regression if I remove the fix.

I suspect you want to init/start/stop spyClient instead of client object:
{code}
      spyClient.init(conf);
      spyClient.start();
      assertFalse("Timeline client should be disabled when"
          + "it is failed to init",
          spyClient.timelineServiceEnabled);
      spyClient.stop();
{code}

Also some nitpicking: 
{code}
LOG.warn("Timeline client could not be initialized "
                    + "because dependency missing or incompatible,"
{code}
It reads more natural to me to say "because of missing or incompatible 
dependency,".

> ATS client doesn't work with Jersey 2 on the classpath
> ------------------------------------------------------
>
>                 Key: YARN-5271
>                 URL: https://issues.apache.org/jira/browse/YARN-5271
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: client, timelineserver
>    Affects Versions: 2.7.2
>            Reporter: Steve Loughran
>            Assignee: Weiwei Yang
>              Labels: oct16-medium
>         Attachments: YARN-5271.01.patch, YARN-5271.branch-2.01.patch
>
>
> see SPARK-15343 : once Jersey 2 is on the CP, you can't instantiate a 
> timeline client, *even if the server is an ATS1.5 server and publishing is 
> via the FS*



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