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https://issues.apache.org/jira/browse/HADOOP-6963?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ravi Prakash reopened HADOOP-6963:
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Reopening for committing to branch-1.
> 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: 0.23.3, 2.0.0, 3.0.0
>
> 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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