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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-10489) UserGroupInformation#getTokens and UserGroupInformation#addToken can lead to ConcurrentModificationException
Date Sat, 17 May 2014 01:57:16 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-10489?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14000603#comment-14000603
] 

Hadoop QA commented on HADOOP-10489:
------------------------------------

{color:green}+1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12644943/HADOOP-10489.patch
  against trunk revision .

    {color:green}+1 @author{color}.  The patch does not contain any @author tags.

    {color:green}+1 tests included{color}.  The patch appears to include 1 new or modified
test files.

    {color:green}+1 javac{color}.  The applied patch does not increase the total number of
javac compiler warnings.

    {color:green}+1 javadoc{color}.  There were no new javadoc warning messages.

    {color:green}+1 eclipse:eclipse{color}.  The patch built with eclipse:eclipse.

    {color:green}+1 findbugs{color}.  The patch does not introduce any new Findbugs (version
1.3.9) warnings.

    {color:green}+1 release audit{color}.  The applied patch does not increase the total number
of release audit warnings.

    {color:green}+1 core tests{color}.  The patch passed unit tests in hadoop-common-project/hadoop-common.

    {color:green}+1 contrib tests{color}.  The patch passed contrib unit tests.

Test results: https://builds.apache.org/job/PreCommit-HADOOP-Build/3949//testReport/
Console output: https://builds.apache.org/job/PreCommit-HADOOP-Build/3949//console

This message is automatically generated.

> UserGroupInformation#getTokens and UserGroupInformation#addToken can lead to ConcurrentModificationException
> ------------------------------------------------------------------------------------------------------------
>
>                 Key: HADOOP-10489
>                 URL: https://issues.apache.org/jira/browse/HADOOP-10489
>             Project: Hadoop Common
>          Issue Type: Bug
>            Reporter: Jing Zhao
>            Assignee: Robert Kanter
>         Attachments: HADOOP-10489.patch
>
>
> Currently UserGroupInformation#getTokens and UserGroupInformation#addToken uses UGI's
monitor to protect the iteration and modification of Credentials#tokenMap. Per [discussion|https://issues.apache.org/jira/browse/HADOOP-10475?focusedCommentId=13965851&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-13965851]
in HADOOP-10475, this can still lead to ConcurrentModificationException.



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