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https://issues.apache.org/jira/browse/HADOOP-9212?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13554031#comment-13554031
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Todd Lipcon commented on HADOOP-9212:
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- the cleanup of the 'in' stream should be in a finally clause, rather than in
the catch clause (in case there's some non-IOE thrown)
- do you need buffering on the input stream?
- Can you add a reference to this JIRA in the comment change in
UserGroupInformation.java? Otherwise I don't think anyone will know about this
lock cycle in a couple months when we've forgotten about this JIRA.
> Potential deadlock in FileSystem.Cache/IPC/UGI
> ----------------------------------------------
>
> Key: HADOOP-9212
> URL: https://issues.apache.org/jira/browse/HADOOP-9212
> Project: Hadoop Common
> Issue Type: Bug
> Components: fs
> Affects Versions: 2.0.2-alpha
> Reporter: Tom White
> Assignee: Tom White
> Attachments: 1_jcarder_result_0.png, HADOOP-9212.patch
>
>
> jcarder found a cycle which could lead to a potential deadlock.
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