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Bug 970178 - JobTracker and TaskTracker cannot run as root
JobTracker and TaskTracker cannot run as root
Product: GlusterFS
Classification: Community
Component: gluster-hadoop (Show other bugs)
Unspecified Unspecified
unspecified Severity high
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Assigned To: Bradley Childs
Martin Bukatovic
Depends On:
Blocks: 1057253
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Reported: 2013-06-03 11:38 EDT by Steve Watt
Modified: 2014-03-03 11:31 EST (History)
7 users (show)

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Doc Type: Bug Fix
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Last Closed: 2014-03-03 11:31:34 EST
Type: Bug
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RHEL 7.3 requirements from Atomic Host:
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Description Steve Watt 2013-06-03 11:38:43 EDT
Presently MapReduce will not work if the JobTracker is run under a user other than root due to the fact that the glusterfs plugin for Hadoop calls getfattr (via getFileBlockLocations) which requires superuser privileges.
Comment 2 Bradley Childs 2013-07-24 15:16:56 EDT
GA Workaround:

Job and Task trackers may run as any non root user, as long as its identical on all systems.  The UIDs must also match.  The  mapreduce job must also be submitted as the same user/UID.

In addition, each system must have a sudoers entry allowing sudo access to the getfattr command by the user that started the trackers and is submitting the job.

An example of the correct sudoers setup is creating a file /etc/sudoers.d/gluster, and add the line:

mapred ALL= NOPASSWD: /usr/bin/getfattr

where mapred is replaced by the user running the trackers + job.

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