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https://issues.apache.org/jira/browse/MAPREDUCE-3380?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13148777#comment-13148777
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Mahadev konar commented on MAPREDUCE-3380:
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@Vinod,
bq. To communicate to the JobHistory server, again we need some delegation
token. I guess we can use the mapreduce JobToken itself but AM somehow needs to
let the JHS know about it - through JobHistory file, or a direct communication
protocol.
Do we really need the JHS token? As far as I understand the getDelgationtoken
is used by a mapred task to submit another job to the cluster. Does it check
for job status from JHS as well? In that case we just need to return the
application token generated in AMLauncher (probably need to create that early
on) no? Also, do we need the application token to be based on app attemptid?
Can we just use the application id?
> Token infrastructure for running clients which are not kerberos authenticated
> -----------------------------------------------------------------------------
>
> Key: MAPREDUCE-3380
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-3380
> Project: Hadoop Map/Reduce
> Issue Type: Sub-task
> Components: mr-am
> Affects Versions: 0.23.0
> Reporter: Alejandro Abdelnur
> Priority: Blocker
> Fix For: 0.23.1
>
> Attachments: MAPREDUCE-3380.branch-0.23.patch,
> MAPREDUCE-3380.branch-0.23.patch
>
>
> The JobClient.getDelegationToken() method is returning NULL, this makes Oozie
> fail when trying to get the delegation token to use it for starting a job.
> What is seems to be happing is that Jobclient.getDelegationToken() calls
> Cluster.getDelegationToken() that calls YarnRunner.getDelegationToken() that
> calls ResourceMgrDelegate.getDelegationToken(). And the last one is not
> implemented. (Thanks Ahmed for tracing this in MR2 code)
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