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From "Robert Joseph Evans (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-3819) Exception while renewing delegation token
Date Mon, 13 Feb 2012 18:34:59 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-3819?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13207047#comment-13207047
] 

Robert Joseph Evans commented on MAPREDUCE-3819:
------------------------------------------------

>From looking at the code there appear to be a few different possibilities here.

# the protocol class is null.
# SecurityUtil.securityInfoProviders is some how not loading the AnnotatedSecurityInfo class.
# the protocol class is not annotated correctly.
# the key returned by the annotation is not set.

One and Three seem very unlikely, because that code has worked before.  Two also seems very
unlikely because the AnnotatedSecurityInfo class and the config file for the ServiceLoader
is in the same jar as SecurityUtils itself.  Found also seems unlikely because the NodeManagers
would in theory use the same config and are able to talk to the NN, but this is the most likely
culprit.  Especially because the RM really does not interact with HDFS at all except here
to renew tokens, so if it were misconfigured then the rest of the RM could keep working just
fine.

@Ramya,

Could you please verify that the following is set in your resource manager configuration "dfs.namenode.kerberos.principal"
                
> Exception while renewing delegation token
> -----------------------------------------
>
>                 Key: MAPREDUCE-3819
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-3819
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: mrv2
>    Affects Versions: 0.23.1
>            Reporter: Ramya Sunil
>            Assignee: Robert Joseph Evans
>            Priority: Critical
>


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