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https://issues.apache.org/jira/browse/HADOOP-8461?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Allen Wittenauer resolved HADOOP-8461.
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Resolution: Duplicate
> Programatically prevent symlink attacks on hadoop pid files
> -----------------------------------------------------------
>
> Key: HADOOP-8461
> URL: https://issues.apache.org/jira/browse/HADOOP-8461
> Project: Hadoop Common
> Issue Type: Bug
> Affects Versions: 1.0.3, 2.0.0-alpha
> Reporter: Robert Joseph Evans
>
> pid files stored in HADOOP_PID_DIR and HADOOP_SECURE_DN_PID_DIR are
> vulnerable to symlink attacks when not properly set. We should
> programatically prevent symlink attacks on these files even if the
> directories are set to something that others can write to.
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