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https://issues.apache.org/jira/browse/SPARK-29971?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16978206#comment-16978206
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Norman Maurer commented on SPARK-29971:
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PR for a fix is here:
https://github.com/apache/spark/pull/26609
The issue was first reported in netty itself:
https://github.com/netty/netty/issues/9784
> Multiple possible buffer leaks in TransportFrameDecoder and TransportCipher
> ---------------------------------------------------------------------------
>
> Key: SPARK-29971
> URL: https://issues.apache.org/jira/browse/SPARK-29971
> Project: Spark
> Issue Type: Bug
> Components: Spark Core
> Affects Versions: 2.4.4, 3.0.0
> Reporter: Norman Maurer
> Priority: Major
>
> TransportFrameDecoder and TransportCipher currently not carefully manage the
> life-cycle of ByteBuf instances and so leak memory in some cases.
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