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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-2892) Unable to get AMRMToken in unmanaged AM when using a secure cluster
Date Sat, 29 Nov 2014 02:35:12 GMT

    [ https://issues.apache.org/jira/browse/YARN-2892?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14228601#comment-14228601
] 

Hadoop QA commented on YARN-2892:
---------------------------------

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12684218/YARN-2892.patch
  against trunk revision 1556f86.

    {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
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-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager:

                  org.apache.hadoop.yarn.server.resourcemanager.security.TestAMRMTokens
                  org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.TestContainerAllocation
                  org.apache.hadoop.yarn.server.resourcemanager.TestRM

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

Test results: https://builds.apache.org/job/PreCommit-YARN-Build/5950//testReport/
Console output: https://builds.apache.org/job/PreCommit-YARN-Build/5950//console

This message is automatically generated.

> Unable to get AMRMToken in unmanaged AM when using a secure cluster
> -------------------------------------------------------------------
>
>                 Key: YARN-2892
>                 URL: https://issues.apache.org/jira/browse/YARN-2892
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: resourcemanager
>            Reporter: Sevada Abraamyan
>            Assignee: Sevada Abraamyan
>         Attachments: YARN-2892.patch, YARN-2892.patch
>
>
> An AMRMToken is retrieved from the ApplicationReport by the YarnClient. 
> When the RM creates the ApplicationReport and sends it back to the client it makes a
simple security check whether it should include the AMRMToken in the report (See createAndGetApplicationReport
in RMAppImpl).This security check verifies that the user who submitted the original application
is the same user who is requesting the ApplicationReport. If they are indeed the same user
then it includes the AMRMToken, otherwise it does not include it.
> The problem arises from the fact that when an application is submitted, the RM  saves
the short username of the user who created the application (See submitApplication in ClientRmService).
Afterwards when the ApplicationReport is requested, the system tries to match the full username
of the requester against the previously stored short username. 
> In a secure cluster using Kerberos this check fails because the principle is stripped
from the username when we request a short username. So for example the short username might
be "Foo" whereas the full username is "Foo@Company.com"
> Note: A very similar problem has been previously reported ([Yarn-2232|https://issues.apache.org/jira/browse/YARN-2232])



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