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From "Marcelo Masiero Vanzin (Jira)" <j...@apache.org>
Subject [jira] [Assigned] (SPARK-29043) [History Server]Only one replay thread of FsHistoryProvider work because of straggler
Date Mon, 16 Dec 2019 22:47:00 GMT

     [ https://issues.apache.org/jira/browse/SPARK-29043?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Marcelo Masiero Vanzin reassigned SPARK-29043:
----------------------------------------------

    Assignee: feiwang

> [History Server]Only one replay thread of FsHistoryProvider work because of straggler
> -------------------------------------------------------------------------------------
>
>                 Key: SPARK-29043
>                 URL: https://issues.apache.org/jira/browse/SPARK-29043
>             Project: Spark
>          Issue Type: Bug
>          Components: Spark Core
>    Affects Versions: 2.4.4
>            Reporter: feiwang
>            Assignee: feiwang
>            Priority: Major
>         Attachments: image-2019-09-11-15-09-22-912.png, image-2019-09-11-15-10-25-326.png,
screenshot-1.png
>
>
> As shown in the attachment, we set spark.history.fs.numReplayThreads=30 for spark history
server.
> However, there is only one replay thread work because of straggler.
> Let's check the code.
> https://github.com/apache/spark/blob/7f36cd2aa5e066a807d498b8c51645b136f08a75/core/src/main/scala/org/apache/spark/deploy/history/FsHistoryProvider.scala#L509-L547
> There is a synchronous operation for all replay tasks.



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