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https://issues.apache.org/jira/browse/SPARK-34125?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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dzcxzl updated SPARK-34125:
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Attachment: jstack.png
> Make EventLoggingListener.codecMap thread-safe
> ----------------------------------------------
>
> Key: SPARK-34125
> URL: https://issues.apache.org/jira/browse/SPARK-34125
> Project: Spark
> Issue Type: Bug
> Components: Spark Core
> Affects Versions: 2.4.7
> Reporter: dzcxzl
> Priority: Trivial
> Attachments: jstack.png, top.png
>
>
> 2.x version of history server
> EventLoggingListener.codecMap is of type mutable.HashMap, which is not thread
> safe
> This will cause the history server to suddenly get stuck and not work.
> The 3.x version was changed to EventLogFileReader.codecMap to
> ConcurrentHashMap type, so there is no such problem.
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