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https://issues.apache.org/jira/browse/HADOOP-7854?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13156027#comment-13156027
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Hadoop QA commented on HADOOP-7854:
-----------------------------------
-1 overall. Here are the results of testing the latest attachment
http://issues.apache.org/jira/secure/attachment/12504902/HADOOP-7854.patch
against trunk revision .
+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 patch. The patch command could not apply the patch.
Console output:
https://builds.apache.org/job/PreCommit-HADOOP-Build/399//console
This message is automatically generated.
> UGI getCurrentUser is not synchronized
> --------------------------------------
>
> Key: HADOOP-7854
> URL: https://issues.apache.org/jira/browse/HADOOP-7854
> Project: Hadoop Common
> Issue Type: Bug
> Components: security
> Affects Versions: 0.20.205.1
> Reporter: Daryn Sharp
> Assignee: Daryn Sharp
> Priority: Critical
> Attachments: HADOOP-7854.patch
>
>
> Sporadic {{ConcurrentModificationExceptions}} are originating from
> {{UGI.getCurrentUser}} when it needs to create a new instance. The problem
> was specifically observed in a JT under heavy load when a post-job cleanup is
> accessing the UGI while a new job is being processed.
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