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https://issues.apache.org/jira/browse/HADOOP-10941?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14235077#comment-14235077
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Hadoop QA commented on HADOOP-10941:
------------------------------------

{color:green}+1 overall{color}.  Here are the results of testing the latest 
attachment 
  http://issues.apache.org/jira/secure/attachment/12662300/HADOOP-10941.patch
  against trunk revision 7896815.

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

    {color:green}+1 tests included{color}.  The patch appears to include 2 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 2.0.3) 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/5151//testReport/
Console output: 
https://builds.apache.org/job/PreCommit-HADOOP-Build/5151//console

This message is automatically generated.

> Proxy user verification NPEs if remote host is unresolvable
> -----------------------------------------------------------
>
>                 Key: HADOOP-10941
>                 URL: https://issues.apache.org/jira/browse/HADOOP-10941
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: ipc, security
>    Affects Versions: 3.0.0, 2.5.0
>            Reporter: Daryn Sharp
>            Assignee: Benoy Antony
>            Priority: Critical
>         Attachments: HADOOP-10941.patch
>
>
> A null is passed to the impersonation providers for the remote address if it 
> is unresolvable.  {{DefaultImpersationProvider}} will NPE, ipc will close the 
> connection immediately (correct behavior for such unexpected exceptions), 
> client fails on {{EOFException}}.



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