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https://issues.apache.org/jira/browse/HADOOP-14556?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16701742#comment-16701742
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Steve Loughran commented on HADOOP-14556:
-----------------------------------------
patch 023 : patch 022 with the sole viable checkstyle issue (indentation) fixed
w.r.t the other style errors, they split into
* complaints about existing code (wont-fix-here)
* links in javadocs too long (wontfix)
* some lines being just past the 80 char barrier, where splitting has no
tangible benefit.
I really need reviews here from anyone who can do this. We also depend on
HADOOP-15808 to harden token load, so ensure that nothing added here breaks
token support for everything if the classpath is incomplete.
> S3A to support Delegation Tokens
> --------------------------------
>
> Key: HADOOP-14556
> URL: https://issues.apache.org/jira/browse/HADOOP-14556
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: fs/s3
> Affects Versions: 3.2.0
> Reporter: Steve Loughran
> Assignee: Steve Loughran
> Priority: Major
> Attachments: HADOOP-14556-001.patch, HADOOP-14556-002.patch,
> HADOOP-14556-003.patch, HADOOP-14556-004.patch, HADOOP-14556-005.patch,
> HADOOP-14556-007.patch, HADOOP-14556-008.patch, HADOOP-14556-009.patch,
> HADOOP-14556-010.patch, HADOOP-14556-010.patch, HADOOP-14556-011.patch,
> HADOOP-14556-012.patch, HADOOP-14556-013.patch, HADOOP-14556-014.patch,
> HADOOP-14556-015.patch, HADOOP-14556-016.patch, HADOOP-14556-017.patch,
> HADOOP-14556-018a.patch, HADOOP-14556-019.patch, HADOOP-14556-020.patch,
> HADOOP-14556-021.patch, HADOOP-14556-022.patch, HADOOP-14556-023.patch,
> HADOOP-14556.oath-002.patch, HADOOP-14556.oath.patch
>
>
> S3A to support delegation tokens where
> * an authenticated client can request a token via
> {{FileSystem.getDelegationToken()}}
> * Amazon's token service is used to request short-lived session secret & id;
> these will be saved in the token and marshalled with jobs
> * A new authentication provider will look for a token for the current user
> and authenticate the user if found
> This will not support renewals; the lifespan of a token will be limited to
> the initial duration. Also, as you can't request an STS token from a
> temporary session, IAM instances won't be able to issue tokens.
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