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Posted to mapreduce-issues@hadoop.apache.org by "Todd Lipcon (JIRA)" <ji...@apache.org> on 2011/04/22 05:11:06 UTC

[jira] [Updated] (MAPREDUCE-2327) MapTask doesn't need to put username information in SpillRecord

     [ https://issues.apache.org/jira/browse/MAPREDUCE-2327?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Todd Lipcon updated MAPREDUCE-2327:
-----------------------------------

    Attachment: mapreduce-2327.txt

Here's a patch on top of MAPREDUCE-2445 including a unit test (which fails without this bug fix)

Will mark patch avail after 2445 is in.

> MapTask doesn't need to put username information in SpillRecord
> ---------------------------------------------------------------
>
>                 Key: MAPREDUCE-2327
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-2327
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>    Affects Versions: 0.22.0
>            Reporter: Todd Lipcon
>            Assignee: Todd Lipcon
>            Priority: Blocker
>             Fix For: 0.22.0
>
>         Attachments: mapreduce-2327.txt, mr-2327.txt
>
>
> This is an amendment to MAPREDUCE-2096 that's found in Yahoo's 0.20.100 branch.
> This bug causes task failures in the following case:
> - Cluster is not set up with LinuxTaskController (ie not secured cluster)
> - Job submitter is not the same as the user running the TT
> - Map output is more than one spill's worth
> The issue is that UserGroupInformation's view of the current user is the job submitter, but on disk the spill files will be owned by the TT user. SecureIO will then fail when constructing the spill record.

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