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From "Daryn Sharp (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-7964) Deadlock in class init.
Date Mon, 09 Jan 2012 22:37:42 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-7964?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13182879#comment-13182879
] 

Daryn Sharp commented on HADOOP-7964:
-------------------------------------

Succinctly, every process that creates a kerberos authenticated connection will experience
the race on its first connection.  The ticket renewal thread and the main thread race to load
the classes.
                
> Deadlock in class init.
> -----------------------
>
>                 Key: HADOOP-7964
>                 URL: https://issues.apache.org/jira/browse/HADOOP-7964
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: security, util
>    Affects Versions: 0.20.205.0, 0.24.0, 0.23.1, 1.0.0, 1.1.0
>            Reporter: Kihwal Lee
>            Assignee: Daryn Sharp
>            Priority: Blocker
>         Attachments: HADOOP-7964.patch
>
>
> After HADOOP-7808, client-side commands hang occasionally. There are cyclic dependencies
in NetUtils and SecurityUtil class initialization. Upon initial look at the stack trace, two
threads deadlock when they hit the either of class init the same time.

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