[
https://issues.apache.org/jira/browse/MAPREDUCE-896?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12745787#action_12745787
]
Vinod K V commented on MAPREDUCE-896:
-------------------------------------
To quote an example, TT cannot properly cleanup the following dirs.
{code}
$mapred.local.dir
`-- taskTracker
`-- jobcache
`--- $jobid
`--- work
`-- unwritable-dir dr--r--r-- <created by user's
task>
`---- user-file -r--r--r-- <created by user's
task>
{code}
> Users can set non-writable permissions on temporary files for TT and can
> abuse disk usage.
> ------------------------------------------------------------------------------------------
>
> Key: MAPREDUCE-896
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-896
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: tasktracker
> Reporter: Vinod K V
>
> As of now, irrespective of the TaskController in use, TT itself does a full
> delete on local files created by itself or job tasks. This step, depending
> upon TT's umask and the permissions set by files by the user, for e.g in
> job-work/task-work or child.tmp directories, may or may not go through
> successful completion fully. Thus is left an opportunity for abusing disk
> space usage either accidentally or intentionally by TT/users.
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
