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https://issues.apache.org/jira/browse/HADOOP-19049?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Steve Loughran resolved HADOOP-19049.
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Fix Version/s: 3.5.0
3.4.1
Resolution: Fixed
> Class loader leak caused by StatisticsDataReferenceCleaner thread
> -----------------------------------------------------------------
>
> Key: HADOOP-19049
> URL: https://issues.apache.org/jira/browse/HADOOP-19049
> Project: Hadoop Common
> Issue Type: Bug
> Components: common
> Affects Versions: 3.3.6
> Reporter: Jia Fan
> Priority: Major
> Labels: pull-request-available
> Fix For: 3.5.0, 3.4.1
>
>
> The
> "org.apache.hadoop.fs.FileSystem$Statistics$StatisticsDataReferenceCleaner"
> daemon thread was created by FileSystem.
> This is fine if the thread's context class loader is the system class loader,
> but it's bad if the context class loader is a custom class loader. The
> reference held by this daemon thread means that the class loader can never
> become eligible for GC.
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