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Posted to mapreduce-issues@hadoop.apache.org by "Bharath Mundlapudi (JIRA)" <ji...@apache.org> on 2011/07/07 01:11:16 UTC
[jira] [Commented] (MAPREDUCE-2651) Race condition in Linux Task
Controller for job log directory creation
[ https://issues.apache.org/jira/browse/MAPREDUCE-2651?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13060907#comment-13060907 ]
Bharath Mundlapudi commented on MAPREDUCE-2651:
-----------------------------------------------
There is a rare race condition in linux task controller when concurrent task processes tries to create job log directory at the same time. Since we change the permissions for a brief moment, at this time, if another task tries to create a directory then the later task will fail with the error like,
{code}
"Directory %s owned by wrong user or group. "
"Expected %d:%d and found %d:%d.\n",
{code}
> Race condition in Linux Task Controller for job log directory creation
> ----------------------------------------------------------------------
>
> Key: MAPREDUCE-2651
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-2651
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: task-controller
> Affects Versions: 0.20.204.0
> Reporter: Bharath Mundlapudi
> Assignee: Bharath Mundlapudi
> Fix For: 0.20.205.0
>
>
> There is a rare race condition in linux task controller when concurrent task processes tries to create job log directory at the same time.
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