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https://issues.apache.org/jira/browse/HADOOP-18623?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17685386#comment-17685386
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ASF GitHub Bot commented on HADOOP-18623:
-----------------------------------------
steveloughran opened a new pull request, #5365:
URL: https://github.com/apache/hadoop/pull/5365
### Description of PR
Adds the production side changes; no tests
### How was this patch tested?
will let yetus do that
### For code changes:
- [X] Does the title or this PR starts with the corresponding JIRA issue id
(e.g. 'HADOOP-17799. Your PR title ...')?
- [ ] Object storage: have the integration tests been executed and the
endpoint declared according to the connector-specific documentation?
- [ ] If adding new dependencies to the code, are these dependencies
licensed in a way that is compatible for inclusion under [ASF
2.0](http://www.apache.org/legal/resolved.html#category-a)?
- [ ] If applicable, have you updated the `LICENSE`, `LICENSE-binary`,
`NOTICE-binary` files?
> S3A delegation token implementations to be able to update tokens from the
> user credentials
> ------------------------------------------------------------------------------------------
>
> Key: HADOOP-18623
> URL: https://issues.apache.org/jira/browse/HADOOP-18623
> Project: Hadoop Common
> Issue Type: New Feature
> Components: fs/s3
> Affects Versions: 3.3.5
> Reporter: Steve Loughran
> Priority: Minor
>
> Spark never renews tokens, instead it can create new ones and attach them to
> the current users credentials.
> This means long-running S3A instances which can pick up new
> tokens/credentials need a way to look for new tokens in the credential chain.
> Proposed
> * class AbstractDelegationTokenBinding adds a CallableRaisingIOE field which
> can be updated with a callback
> * S3ADelegationTokens to add method boolean maybeUpdateTokenFromOwner() to
> look for any new token and switch to it if new
> * S3ADelegationTokens serviceInit() to pass the method down to the
> instantiated DT binding as the callback
> It is up to the token binding implementation to decide what to do about it;
> the standard implementations will do: nothing.
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