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https://issues.apache.org/jira/browse/KAFKA-3986?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16375976#comment-16375976
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ASF GitHub Bot commented on KAFKA-3986:
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hachikuji closed pull request #1657: KAFKA-3986 Add null check to
completedReceives
URL: https://github.com/apache/kafka/pull/1657
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> completedReceives can contain closed channels
> ----------------------------------------------
>
> Key: KAFKA-3986
> URL: https://issues.apache.org/jira/browse/KAFKA-3986
> Project: Kafka
> Issue Type: Bug
> Components: network
> Reporter: Ryan P
> Priority: Major
> Fix For: 1.0.0
>
>
> I'm not entirely sure why at this point but it is possible to throw a Null
> Pointer Exception when processingCompletedReceives. This happens when a
> fairly substantial number of simultaneously initiated connections are
> initiated with the server.
> The processor thread does carry on but it may be worth investigating how the
> channel could be both closed and completedReceives.
> The NPE in question is thrown here:
> https://github.com/apache/kafka/blob/trunk/core/src/main/scala/kafka/network/SocketServer.scala#L490
> It can not be consistently reproduced either.
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