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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-6670) UserGroupInformation doesn't support use in hash tables
Date Sat, 17 Jul 2010 02:03:51 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-6670?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12889451#action_12889451
] 

Hudson commented on HADOOP-6670:
--------------------------------

Integrated in Hadoop-Common-trunk-Commit #329 (See [http://hudson.zones.apache.org/hudson/job/Hadoop-Common-trunk-Commit/329/])
    HADOOP-6670. Use the UserGroupInformation's Subject as the criteria for equals and hashCode.
Contributed by Owen O'Malley and Kan Zhang.


> UserGroupInformation doesn't support use in hash tables
> -------------------------------------------------------
>
>                 Key: HADOOP-6670
>                 URL: https://issues.apache.org/jira/browse/HADOOP-6670
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: security
>            Reporter: Owen O'Malley
>            Assignee: Owen O'Malley
>             Fix For: 0.22.0
>
>         Attachments: 6670-gridmix-test.bugfix.patch, c6670-02.patch, c6670-03.patch,
fs-close.patch, fs-close.patch, fs-close.patch
>
>
> The UserGroupInformation objects are mutable, but they are used as keys in hash tables.
This leads to serious problems in the FileSystem cache and RPC connection cache. We need to
change the hashCode to be the identity hash code of the Subject and change equals to use ==
between the Subjects.

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