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Posted to common-dev@hadoop.apache.org by "Hemanth Yamijala (JIRA)" <ji...@apache.org> on 2008/04/17 07:15:21 UTC
[jira] Updated: (HADOOP-2899) [HOD] hdfs:///mapredsystem directory
not cleaned up after deallocation
[ https://issues.apache.org/jira/browse/HADOOP-2899?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Hemanth Yamijala updated HADOOP-2899:
-------------------------------------
Release Note: The mapred system directory generated by HOD is cleaned up at cluster deallocation time.
Hadoop Flags: [Reviewed]
> [HOD] hdfs:///mapredsystem directory not cleaned up after deallocation
> -----------------------------------------------------------------------
>
> Key: HADOOP-2899
> URL: https://issues.apache.org/jira/browse/HADOOP-2899
> Project: Hadoop Core
> Issue Type: Bug
> Components: contrib/hod
> Affects Versions: 0.16.0
> Reporter: Luca Telloli
> Assignee: Hemanth Yamijala
> Fix For: 0.17.0
>
> Attachments: 2899.1.patch
>
>
> Each submitted job creates a hdfs:///mapredsystem directory, created by (I guess) the hodring process. Problem is that it's not cleaned up at the end of the process; a use case would be:
> - user A allocates a cluster, the hodring is svrX, so a /mapredsystem/srvX directory is created
> - user A deallocates the cluster, but that directory is not cleaned up
> - user B allocates a cluster, and the first node chosen as hodring is svrX, so hodring tries to write hdfs:///mapredsystem but it fails
> - allocation succeeds, but there's no hodring running; looking at
> 0-jobtracker/logdir/hadoop.log under the temporary directory I can read:
> 2008-02-26 17:28:42,567 WARN org.apache.hadoop.mapred.JobTracker: Error starting tracker: org.apache.hadoop.ipc.RemoteException: org.apache.hadoop.fs.permission.AccessControlException: Permission denied: user=B, access=WRITE, inode="mapredsystem":hadoop:supergroup:rwxr-xr-x
> I guess a possible solution would be to clean up those directories during the deallocation process.
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