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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-1321) NMTokenCache is a a singleton, prevents multiple AMs running in a single JVM to work correctly
Date Mon, 21 Oct 2013 22:58:42 GMT

    [ https://issues.apache.org/jira/browse/YARN-1321?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13801282#comment-13801282
] 

Hadoop QA commented on YARN-1321:
---------------------------------

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12609544/YARN-1321.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 2 new or modified
test files.

      {color:red}-1 javac{color}.  The applied patch generated 1548 javac compiler warnings
(more than the trunk's current 1547 warnings).

    {color:green}+1 javadoc{color}.  The javadoc tool did not generate any 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-yarn-project/hadoop-yarn/hadoop-yarn-client.

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

Test results: https://builds.apache.org/job/PreCommit-YARN-Build/2246//testReport/
Javac warnings: https://builds.apache.org/job/PreCommit-YARN-Build/2246//artifact/trunk/patchprocess/diffJavacWarnings.txt
Console output: https://builds.apache.org/job/PreCommit-YARN-Build/2246//console

This message is automatically generated.

> NMTokenCache is a a singleton, prevents multiple AMs running in a single JVM to work
correctly
> ----------------------------------------------------------------------------------------------
>
>                 Key: YARN-1321
>                 URL: https://issues.apache.org/jira/browse/YARN-1321
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: client
>    Affects Versions: 2.2.0
>            Reporter: Alejandro Abdelnur
>            Assignee: Alejandro Abdelnur
>            Priority: Blocker
>             Fix For: 2.2.1
>
>         Attachments: YARN-1321.patch, YARN-1321.patch, YARN-1321.patch, YARN-1321.patch
>
>
> NMTokenCache is a singleton. Because of this, if running multiple AMs in a single JVM
NMTokens for the same node from different AMs step on each other and starting containers fail
due to mismatch tokens.
> The error observed in the client side is something like:
> {code}
> ERROR org.apache.hadoop.security.UserGroupInformation: PriviledgedActionException as:llama
(auth:PROXY) via llama (auth:SIMPLE) cause:org.apache.hadoop.yarn.exceptions.YarnException:
Unauthorized request to start container. 
> NMToken for application attempt : appattempt_1382038445650_0002_000001 was used for starting
container with container token issued for application attempt : appattempt_1382038445650_0001_000001
> {code}



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