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From "Sreekanth Ramakrishnan (JIRA)" <j...@apache.org>
Subject [jira] Assigned: (HADOOP-5686) Tasks execed by the task controller shouldn't inherit tasktracker groups
Date Thu, 16 Apr 2009 03:26:22 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-5686?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Sreekanth Ramakrishnan reassigned HADOOP-5686:
----------------------------------------------

    Assignee: Sreekanth Ramakrishnan

> Tasks execed by the task controller shouldn't inherit tasktracker groups
> ------------------------------------------------------------------------
>
>                 Key: HADOOP-5686
>                 URL: https://issues.apache.org/jira/browse/HADOOP-5686
>             Project: Hadoop Core
>          Issue Type: Bug
>          Components: mapred
>         Environment: hadoo 0.20 + patches, Linux Task controller
>            Reporter: Rajiv Chittajallu
>            Assignee: Sreekanth Ramakrishnan
>
> Mapred tasks process seem to inherit the group list from the TaskTracker daemon instead
of the task owner. 
> tom   26633 15736  0 21:33 ?        00:00:02 /usr/bin/java  ...  org.apache.hadoop.mapred.Child
127.0.0.1 51207 ..
> mapred   15736     1  2 Apr08 ?        03:54:59 /usr/bin/java ... org.apache.hadoop.mapred.TaskTracker
> hadoop1:~$ id mapred
> uid=50589(mapred) gid=100(users) groups=100(users),20001(hadoop)
> hadoop1:~$ fgrep Groups /proc/26633/status
> Groups: 100 20001 
> hadoop1:~$ id tom
> uid=47765(tom) gid=100(users) groups=100(users),10764(ninjas)
> org.apache.hadoop.mapred.LinuxTaskController should set the user supplimentary group
list. 

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