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From "Alejandro Abdelnur (JIRA)" <j...@apache.org>
Subject [jira] [Created] (YARN-1321) NMTokenCache should not be a singleton
Date Fri, 18 Oct 2013 19:12:42 GMT
Alejandro Abdelnur created YARN-1321:
----------------------------------------

             Summary: NMTokenCache should not be a singleton
                 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


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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