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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-6913) Circular initialization between UserGroupInformation and KerberosName
Date Fri, 27 Aug 2010 21:51:54 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-6913?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12903663#action_12903663
] 

Hadoop QA commented on HADOOP-6913:
-----------------------------------

-1 overall.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12451830/c6913-01.patch
  against trunk revision 989999.

    +1 @author.  The patch does not contain any @author tags.

    -1 tests included.  The patch doesn't appear to include any new or modified tests.
                        Please justify why no new tests are needed for this patch.
                        Also please list what manual steps were performed to verify this patch.

    -1 javadoc.  The javadoc tool appears to have generated 1 warning messages.

    +1 javac.  The applied patch does not increase the total number of javac compiler warnings.

    +1 findbugs.  The patch does not introduce any new Findbugs warnings.

    +1 release audit.  The applied patch does not increase the total number of release audit
warnings.

    +1 core tests.  The patch passed core unit tests.

    +1 contrib tests.  The patch passed contrib unit tests.

Test results: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch-h9.grid.sp2.yahoo.net/40/testReport/
Findbugs warnings: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch-h9.grid.sp2.yahoo.net/40/artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
Checkstyle results: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch-h9.grid.sp2.yahoo.net/40/artifact/trunk/build/test/checkstyle-errors.html
Console output: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch-h9.grid.sp2.yahoo.net/40/console

This message is automatically generated.

> Circular initialization between UserGroupInformation and KerberosName
> ---------------------------------------------------------------------
>
>                 Key: HADOOP-6913
>                 URL: https://issues.apache.org/jira/browse/HADOOP-6913
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: security
>            Reporter: Kan Zhang
>            Assignee: Kan Zhang
>         Attachments: c6913-01.patch
>
>
> If the first call to UGI is UGI.setConfiguration(conf), it will try to initialize UGI
class. During this initialization, the code calls KerberosName.setConfiguration(). KerberosName's
static initializer will in turn call UGI.isSecurityEnabled(). Since UGI hasn't been completely
initialized yet, isSecurityEnabled() will re-initialize UGI with a DEFAULT conf. As a result,
the original conf used in UGI.setConfiguration(conf) will be overwritten by the DEFAULT conf.

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