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Posted to common-issues@hadoop.apache.org by "Akira AJISAKA (JIRA)" <ji...@apache.org> on 2015/08/14 03:12:46 UTC
[jira] [Commented] (HADOOP-11802) DomainSocketWatcher thread
terminates sometimes after there is an I/O error during
requestShortCircuitShm
[ 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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