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https://issues.apache.org/jira/browse/SPARK-8101?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14578839#comment-14578839
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SuYan commented on SPARK-8101:
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Sorry for late to see that, that problem was fix in 4.0.29-Final, which not
release formal in current.
and if some one encounter directbuffer problem, they can pull the netty patch
manually.(https://github.com/netty/netty/issues/3837), and we can upgrade if
4.0.29-Final released.
> Upgrade netty to avoid memory leak accord to netty #3837 issues
> ---------------------------------------------------------------
>
> Key: SPARK-8101
> URL: https://issues.apache.org/jira/browse/SPARK-8101
> Project: Spark
> Issue Type: Improvement
> Components: Spark Core
> Affects Versions: 1.4.0
> Reporter: SuYan
> Assignee: Sean Owen
> Priority: Minor
> Fix For: 1.5.0
>
>
> There is a direct buffer leak in netty, due to netty 4.0.23-Final not release
> threadlocal after netty already send message success.
> Please Ref: https://github.com/netty/netty/issues/3837
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