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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (KAFKA-3986) completedReceives can contain closed channels
Date Sun, 25 Feb 2018 07:33:00 GMT

    [ https://issues.apache.org/jira/browse/KAFKA-3986?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16375976#comment-16375976

ASF GitHub Bot commented on KAFKA-3986:

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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