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From "Daryn Sharp (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-7964) Deadlock in class init.
Date Tue, 10 Jan 2012 21:56:42 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-7964?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13183623#comment-13183623

Daryn Sharp commented on HADOOP-7964:

bq. Add {{@VisibleForTesting}} to {{SecurityUtil#useIpForTokenService}} and {{SecurityUtil#hostResolver}}

Sure, good idea.

bq. Consider just adding accessor for {{useIpForTokenService}}.

{{useIpForTokenService}} is only intended to ever be used in one place by {{SecurityUtil#buildTokenService()}}.
 I thought it'd be faster to directly access the class member but I'll add an accessor if
you like.

bq. We should perhaps post a patch for 205 also and get it in in a subsequent 1.x release.

Theoretically the patch should apply since the trunk code came from 205, but I'll double check.
> 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:, 0.24.0, 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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