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Posted to common-dev@hadoop.apache.org by "Tsz Wo (Nicholas), SZE (Resolved) (JIRA)" <ji...@apache.org> on 2012/04/05 21:52:24 UTC
[jira] [Resolved] (HADOOP-6963) Fix FileUtil.getDU. It should not
include the size of the directory or follow symbolic links
[ https://issues.apache.org/jira/browse/HADOOP-6963?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Tsz Wo (Nicholas), SZE resolved HADOOP-6963.
--------------------------------------------
Resolution: Fixed
Fix Version/s: (was: 3.0.0)
(was: 2.0.0)
1.0.3
Target Version/s: 1.0.3, 0.23.3 (was: 0.23.3, 1.0.3)
I also committed the patch to branch-1 and branch-1.0.
> Fix FileUtil.getDU. It should not include the size of the directory or follow symbolic links
> --------------------------------------------------------------------------------------------
>
> Key: HADOOP-6963
> URL: https://issues.apache.org/jira/browse/HADOOP-6963
> Project: Hadoop Common
> Issue Type: Bug
> Components: fs
> Affects Versions: 0.20.205.0, 0.23.1
> Reporter: Owen O'Malley
> Assignee: Ravi Prakash
> Priority: Critical
> Fix For: 1.0.3, 0.23.3
>
> Attachments: HADOOP-6963.branch-1.0.2.patch, HADOOP-6963.branch-1.0.2.patch, HADOOP-6963.branch-1.patch, HADOOP-6963.branch-23.patch, HADOOP-6963.branch-23.patch, HADOOP-6963.branch-23.patch
>
>
> The getDU method should not include the size of the directory. The Java interface says that the value is undefined and in Linux/Sun it gets the 4096 for the inode. Clearly this isn't useful.
> It also recursively calls itself. In case the directory has a symbolic link forming a cycle, getDU keeps spinning in the cycle. In our case, we saw this in the org.apache.hadoop.mapred.JobLocalizer.downloadPrivateCacheObjects call. This prevented other tasks on the same node from committing, causing the TT to become effectively useless (because the JT thinks it already has enough tasks running)
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