[jira] [Updated] (YARN-11916) FileSystemTimelineReaderImpl vulnerable to race conditions

["ASF GitHub Bot (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/YARN-11916?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

ASF GitHub Bot updated YARN-11916:
----------------------------------
    Labels: pull-request-available  (was: )

> FileSystemTimelineReaderImpl vulnerable to race conditions
> ----------------------------------------------------------
>
>                 Key: YARN-11916
>                 URL: https://issues.apache.org/jira/browse/YARN-11916
>             Project: Hadoop YARN
>          Issue Type: Improvement
>          Components: timelineserver
>    Affects Versions: 3.4.2
>            Reporter: Steve Loughran
>            Assignee: Steve Loughran
>            Priority: Minor
>              Labels: pull-request-available
>
> Yarn timelineserver FileSystemTimelineReaderImpl implementation does atomic updates via: copy, append, rename. This gives it bad scalability and concurrent calls will lose data.
>  has bad concurrency on write and will lose updates. And its scalability 
> Not plans to fix what was just the PoC of the v2 API, just
> * update javadocs
> * warn on startup that people should stop it.
> * do some other hardening while there, and test cleanup
> This code is @Private/@Unstable. Maybe we can move it into the -test jar. Nobody will complain.



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