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https://issues.apache.org/jira/browse/MAPREDUCE-3825?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13206994#comment-13206994
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Sanjay Radia commented on MAPREDUCE-3825:
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The purpose of this JIra is to get delegation tokens without duplication for
MR. All the additional requirements that you state with "I want " "I want" "I
want" belong in a different jira.
>I want this filesystem's delegation token - getDelegationToken(renewer)
I already argued above that i disagree that this is a reasonable API since a
multi-filesystem cannot implement it and furthermore I disagree that a
multifilesystem like viewfs should return null.
> I want all delegation tokens used by this filesystem -
> getDelegationTokens(renewer)
Pass in a an empty credentials to addDTs(renewer, emptyCredentials).
I agree that addDTs(renewer, cred) is a weird API, but your
getDelegationTokens(renewer, creds) is equally weird.
> Need generalized multi-token filesystem support
> -----------------------------------------------
>
> Key: MAPREDUCE-3825
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-3825
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: security
> Affects Versions: 0.23.1, 0.24.0
> Reporter: Daryn Sharp
> Assignee: Daryn Sharp
> Attachments: MAPREDUCE-3825.patch, TokenCache.pdf
>
>
> This is the counterpart to HADOOP-7967. The token cache currently tries to
> assume a filesystem's token service key. The assumption generally worked
> while there was a one to one mapping of filesystem to token. With the advent
> of multi-token filesystems like viewfs, the token cache will try to use a
> service key (ie. for viewfs) that will never exist (because it really gets
> the mounted fs tokens).
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