[jira] [Created] (YARN-6561) Update exception information during timeline collector aux service initialization

["Vrushali C (JIRA)" <ji...@apache.org>]

Vrushali C created YARN-6561:
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             Summary: Update exception information during timeline collector aux service initialization
                 Key: YARN-6561
                 URL: https://issues.apache.org/jira/browse/YARN-6561
             Project: Hadoop YARN
          Issue Type: Sub-task
            Reporter: Vrushali C
            Assignee: Vrushali C
            Priority: Minor



If the NM is started with timeline service v2 turned off AND aux services setting still containing "timeline_collector", NM will fail to start up since the PerNodeTimelineCollectorsAuxService#serviceInit is invoked and it throws an exception. The exception message is a bit misleading and does not indicate where the actual misconfiguration is. 

We should update the exception message so that the right error is conveyed and helps the cluster admin/ops to correct the relevant yarn config settings.



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