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https://issues.apache.org/jira/browse/MAPREDUCE-871?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Vinod K V updated MAPREDUCE-871:
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Attachment: MAPREDUCE-871-20090820.1.txt
Here's the scenario.
{quote}
TT process user/group information: mapred
group1,group2,group3 (group1 is primary)
task-controller ownership: ---Sr-s--- 1 root group2
job submitter: userA:groupA
{quote}
The bug is the ownership of files created for the task, for e.g.
bq. $jobid dr-xrws--- userA group1
Attaching patch to fix this issue which essentially sets the permissions of
files created for the task as
bq. $jobid dr-xrws--- userA group2
Also modified the testcase to reflect this.
> Job/Task local files have incorrect group ownership set by
> LinuxTaskController binary
> -------------------------------------------------------------------------------------
>
> Key: MAPREDUCE-871
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-871
> Project: Hadoop Map/Reduce
> Issue Type: Sub-task
> Components: tasktracker
> Reporter: Vinod K V
> Assignee: Vinod K V
> Attachments: MAPREDUCE-871-20090820.1.txt
>
>
> HADOOP-4491 fixed the secure permissions of local files on a TT. While
> testing HADOOP-4491 on a cluster, [~karams] found out a bug. All the
> files/dirs have should be owned by the group corresponding to the group owner
> of the task-controller binary (via using getegid()) which in turn is a
> special group to which *only* TT user belongs. HADOOP-4491 incorrectly set it
> to primary group of the TT via getgid(), and not the special group.
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