[jira] [Resolved] (YARN-4937) EntityGroupFSTimelineStore to close cached leveldb instances in serviceStop()

["Steve Loughran (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/YARN-4937?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Steve Loughran resolved YARN-4937.
----------------------------------
    Resolution: Cannot Reproduce

not in branch-2

> EntityGroupFSTimelineStore to close cached leveldb instances in serviceStop()
> -----------------------------------------------------------------------------
>
>                 Key: YARN-4937
>                 URL: https://issues.apache.org/jira/browse/YARN-4937
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: timelineserver
>    Affects Versions: 2.8.0
>         Environment: JUnit test runs with
>            Reporter: Steve Loughran
>
> When I enable ATS1.5 and non-summary data, all my JUnit test runs with it fail  pass if called individually. But if executed together, the 2nd+ service fails, key exception text is
> {code}
> org.fusesource.leveldbjni.internal.NativeDB$DBException: IO error: lock /Users/stevel/Projects/spark/yarn-timeline/yarn-timeline-history/target/tmp/integration/leveldb/timelineEntityGroupId_1111_0_application_1111_0000-timeline-cache.ldb/LOCK: already held by process
> {code}
> I believe the problem is that {{EntityGroupFSTimelineStore.cachedLogs}} isn't cleaning up its logs in {{serviceStop()}}, and as my tests use the same directory and appIds in its test runs, the next attempt to create a cache item fails.



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