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From "Kan Zhang (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HADOOP-6670) UserGroupInformation doesn't support use in hash tables
Date Mon, 12 Jul 2010 17:17:54 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-6670?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Kan Zhang updated HADOOP-6670:
------------------------------

    Status: Patch Available  (was: Open)

> 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
>         Attachments: 6670-gridmix-test.bugfix.patch, c6670-02.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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