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From "Devaraj Das (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HADOOP-6670) UserGroupInformation doesn't support use in hash tables
Date Sun, 25 Apr 2010 00:06:50 GMT

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

Devaraj Das updated HADOOP-6670:
--------------------------------

    Attachment: 6670-gridmix-test.bugfix.patch

Fixes a testcase that got affected by the UGI changes in hashcode/equals methods.

> 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, 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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