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https://issues.apache.org/jira/browse/MAPREDUCE-4964?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13567909#comment-13567909
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Alejandro Abdelnur commented on MAPREDUCE-4964:
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Arun, since we applied this patch to the cluster we were seing the issue (2
days ago), this error never occurred again and we don't see any side effects.
Before applying the patch we were seeing this errors on regular basis, errors
typically don't fail because the tasks get retried and eventually the job
completes (we assume this was the reason this was not caught before). We'd like
to get this in ASAP, what are your concerns with the patch?
> JobLocalizer#localizeJobFiles can potentially write job.xml to the wrong
> user's directory
> -----------------------------------------------------------------------------------------
>
> Key: MAPREDUCE-4964
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-4964
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: mrv1
> Affects Versions: 1.1.1
> Reporter: Karthik Kambatla
> Assignee: Karthik Kambatla
> Attachments: MR-4964.patch, MR-4964.patch
>
>
> In the following code, if jobs corresponding to different users (X and Y) are
> localized simultaneously, it is possible that jobconf can be written to the
> wrong user's directory. (X's job.xml can be written to Y's directory)
> {code}
> public void localizeJobFiles(JobID jobid, JobConf jConf,
> Path localJobTokenFile, TaskUmbilicalProtocol taskTracker)
> throws IOException, InterruptedException {
> localizeJobFiles(jobid, jConf,
> lDirAlloc.getLocalPathForWrite(JOBCONF, ttConf), localJobTokenFile,
> taskTracker);
> }
> {code}
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