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https://issues.apache.org/jira/browse/HADOOP-19049?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17809927#comment-17809927
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ASF GitHub Bot commented on HADOOP-19049:
-----------------------------------------
Hisoka-X opened a new pull request, #6488:
URL: https://github.com/apache/hadoop/pull/6488
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### Description of PR
This PR fix StatisticsDataReferenceCleaner thread class loader leak problem.
Before start it we should make sure it can not reference class loader.
### How was this patch tested?
Tested in local.
### For code changes:
- [ ] Does the title or this PR starts with the corresponding JIRA issue id
(e.g. 'HADOOP-17799. Your PR title ...')?
- [ ] Object storage: have the integration tests been executed and the
endpoint declared according to the connector-specific documentation?
- [ ] If adding new dependencies to the code, are these dependencies
licensed in a way that is compatible for inclusion under [ASF
2.0](http://www.apache.org/legal/resolved.html#category-a)?
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> 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
>
> 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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