[jira] [Resolved] (SPARK-21078) JobHistory applications synchronized is invalid

["Sean Owen (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-21078?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Sean Owen resolved SPARK-21078.
-------------------------------
    Resolution: Duplicate

I'm resolving this as 'duplicate' but really this will just go away when the linked change finishes. If there's no evidence it's causing a problem in practice then I think we can wait.

https://github.com/apache/spark/pull/18497#issuecomment-313815621

> JobHistory applications synchronized is invalid
> -----------------------------------------------
>
>                 Key: SPARK-21078
>                 URL: https://issues.apache.org/jira/browse/SPARK-21078
>             Project: Spark
>          Issue Type: Bug
>          Components: Spark Core
>    Affects Versions: 2.1.1
>            Reporter: fangfengbin
>
> FsHistoryProvider has some threads to mergeApplicationListing.
> mergeApplicationListing function has code like this:
> applications.synchronized { 
> ...
> applications = mergedApps 
> ...
> } 
> applications object is changed,  so the synchronized do not work.



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