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https://issues.apache.org/jira/browse/HADOOP-10346?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13912022#comment-13912022
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Jason Lowe commented on HADOOP-10346:
-------------------------------------
It looks like this was caused by MAPREDUCE-4148 which was fixed in 2.0.2-alpha.
It's not something that can happen unless the service loader doesn't find the
token identifier class which isn't a normal situation, so I'm doubtful this is
necessary for 2.3.
> Deadlock while logging tokens
> -----------------------------
>
> Key: HADOOP-10346
> URL: https://issues.apache.org/jira/browse/HADOOP-10346
> Project: Hadoop Common
> Issue Type: Bug
> Components: security
> Affects Versions: 2.2.0
> Reporter: Jason Lowe
> Assignee: Jason Lowe
> Priority: Blocker
> Fix For: 2.4.0
>
> Attachments: HADOOP-10346.patch
>
>
> Ran into a deadlock between two threads that were both wielding Tokens. One
> was trying to log a token while the other was trying to set the token service
> on a different token.
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