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From "Daryn Sharp (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-9549) WebHdfsFileSystem hangs on close()
Date Tue, 07 May 2013 18:11:16 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-9549?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13651128#comment-13651128
] 

Daryn Sharp commented on HADOOP-9549:
-------------------------------------

The findbug warning is on a method marked {{@VisibleForTesting}} only, so please review and
I'll update the patch soon.
                
> WebHdfsFileSystem hangs on close()
> ----------------------------------
>
>                 Key: HADOOP-9549
>                 URL: https://issues.apache.org/jira/browse/HADOOP-9549
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: security
>    Affects Versions: 2.0.4-alpha
>            Reporter: Kihwal Lee
>            Assignee: Daryn Sharp
>            Priority: Blocker
>         Attachments: HADOOP-9549.patch
>
>
> When close() is called via fs shoutdown hook, the synchronized method, removeRenewAction()
hangs. This is because DelegationTokenRenewer calls DelayQueue.take() inside a synchronized
block. Since this is a blocking call, it hangs forever.

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