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From "Akira AJISAKA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-11802) DomainSocketWatcher thread terminates sometimes after there is an I/O error during requestShortCircuitShm
Date Fri, 14 Aug 2015 01:12:46 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-11802?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14696282#comment-14696282
] 

Akira AJISAKA commented on HADOOP-11802:
----------------------------------------

If we are going to backport this issue to branch-2.6, we need to backport HDFS-7915 before.
If we backport these, we should backport HDFS-8070 as well because HDFS-7915 breaks it.

> DomainSocketWatcher thread terminates sometimes after there is an I/O error during requestShortCircuitShm
> ---------------------------------------------------------------------------------------------------------
>
>                 Key: HADOOP-11802
>                 URL: https://issues.apache.org/jira/browse/HADOOP-11802
>             Project: Hadoop Common
>          Issue Type: Bug
>    Affects Versions: 2.7.0
>            Reporter: Eric Payne
>            Assignee: Colin Patrick McCabe
>              Labels: 2.6.1-candidate
>             Fix For: 2.7.1
>
>         Attachments: HADOOP-11802.001.patch, HADOOP-11802.002.patch, HADOOP-11802.003.patch,
HADOOP-11802.004.patch
>
>
> In {{DataXceiver#requestShortCircuitShm}}, we attempt to recover from some errors by
closing the {{DomainSocket}}.  However, this violates the invariant that the domain socket
should never be closed when it is being managed by the {{DomainSocketWatcher}}.  Instead,
we should call {{shutdown}} on the {{DomainSocket}}.  When this bug hits, it terminates the
{{DomainSocketWatcher}} thread.



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