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https://issues.apache.org/jira/browse/HADOOP-11567?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14612521#comment-14612521
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Arpit Agarwal commented on HADOOP-11567:
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Thanks for this improvement [~benoyantony].
I've posted a few comments to Github
https://github.com/arp7/hadoop/commit/160cf1ec45ad666c66ca33e6a1a5bf0774a6f76e?diff=unified
I'll copy paste my comments to this Jira shortly.
> Refresh HTTP Authentication secret without restarting the server
> ----------------------------------------------------------------
>
> Key: HADOOP-11567
> URL: https://issues.apache.org/jira/browse/HADOOP-11567
> Project: Hadoop Common
> Issue Type: Improvement
> Affects Versions: 2.6.0
> Reporter: Benoy Antony
> Assignee: Benoy Antony
> Labels: BB2015-05-TBR
> Attachments: HADOOP-11567-001.patch, HADOOP-11567-002.patch
>
>
> The _AuthenticationFilter_ uses the secret read from a file specified via
> hadoop.http.authentication.signature.secret.file to sign the cookie
> containing user authentication information.
> The secret is read only during initialization and hence needs a restart to
> update the secret.
> ZKSignerSecretProvider can be used to rotate the secrets without restarting
> the servers, but it needs a zookeeper setup.
> The jira is to refresh secret by updating the file.
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