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https://issues.apache.org/jira/browse/HADOOP-11117?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14144069#comment-14144069
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Hadoop QA commented on HADOOP-11117:
------------------------------------

{color:red}-1 overall{color}.  Here are the results of testing the latest 
attachment 
  
http://issues.apache.org/jira/secure/attachment/12670518/HADOOP-11117-001.patch
  against trunk revision 23e17ce.

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

    {color:red}-1 tests included{color}.  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.

    {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:red}-1 core tests{color}.  The patch failed these unit tests in 
hadoop-common-project/hadoop-common:

                  org.apache.hadoop.crypto.random.TestOsSecureRandom
                  org.apache.hadoop.security.TestUserGroupInformation
                  org.apache.hadoop.ha.TestZKFailoverControllerStress

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

Test results: 
https://builds.apache.org/job/PreCommit-HADOOP-Build/4788//testReport/
Console output: 
https://builds.apache.org/job/PreCommit-HADOOP-Build/4788//console

This message is automatically generated.

> UGI HadoopLoginModule doesn't catch & wrap all kerberos-related exceptions
> --------------------------------------------------------------------------
>
>                 Key: HADOOP-11117
>                 URL: https://issues.apache.org/jira/browse/HADOOP-11117
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: security
>    Affects Versions: 2.5.1
>            Reporter: Steve Loughran
>            Assignee: Steve Loughran
>            Priority: Minor
>             Fix For: 2.6.0
>
>         Attachments: HADOOP-11117-001.patch
>
>
> If something is failing with kerberos login, 
> {{UserGroupInformation.loginUserFromKeytabAndReturnUGI()}} should fail with 
> useful information. But not all exceptions from the inner code are caught and 
> converted to LoginException. Those exceptions that aren't wrapped have their 
> text and stack trace lost somewhere in the javax code, leaving on the text 
> "login failed" and a stack trace of no value whatsoever.



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