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From "Kihwal Lee (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (MAPREDUCE-2915) LinuxTaskController does not work when JniBasedUnixGroupsNetgroupMapping or JniBasedUnixGroupsMapping is enabled
Date Wed, 31 Aug 2011 01:27:10 GMT

     [ https://issues.apache.org/jira/browse/MAPREDUCE-2915?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Kihwal Lee updated MAPREDUCE-2915:
----------------------------------

    Status: Patch Available  (was: Open)

> LinuxTaskController does not work when JniBasedUnixGroupsNetgroupMapping or JniBasedUnixGroupsMapping
is enabled
> ----------------------------------------------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-2915
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-2915
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: task-controller
>    Affects Versions: 0.20.205.0
>            Reporter: Kihwal Lee
>            Assignee: Kihwal Lee
>             Fix For: 0.20.205.0
>
>         Attachments: linux_tc_fix.patch.txt
>
>
> When a job is submitted, LinuxTaskController launches the native task-controller binary
for job initialization. The native program does a series of prep work and call execv() to
run JobLocalizer.  It was observed that JobLocalizer does fails to run when JniBasedUnixGroupsNetgroupMapping
or JniBasedUnixGroupsMapping is enabled, resulting in 100% job failures.
> JobLocalizer normally does not need the native library (libhadoop) for its functioning,
but enabling a JNI user-to-group mapping function cause it to load the library. However, JobLocalizer
cannot locate the library since "java.library.path" is not set.
> The proposed solution is to pass the java.library.path property through task-controller.
LinuxTaskController already does it when launching the task log truncater.

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