[jira] [Updated] (HADOOP-11482) Use correct UGI when KMSClientProvider is called by a proxy user

["Vinod Kumar Vavilapalli (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HADOOP-11482?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Vinod Kumar Vavilapalli updated HADOOP-11482:
---------------------------------------------
    Fix Version/s: 2.6.1

Pulled this into 2.6.1 after [~ajisakaa] verified that the patch applies cleanly. Ran compilation and TestKMS before the push.


> Use correct UGI when KMSClientProvider is called by a proxy user
> ----------------------------------------------------------------
>
>                 Key: HADOOP-11482
>                 URL: https://issues.apache.org/jira/browse/HADOOP-11482
>             Project: Hadoop Common
>          Issue Type: Bug
>    Affects Versions: 2.6.0
>            Reporter: Arun Suresh
>            Assignee: Arun Suresh
>              Labels: 2.6.1-candidate
>             Fix For: 2.6.1, 2.7.0
>
>         Attachments: HADOOP-11482.1.patch, HADOOP-11482.2.patch
>
>
> Long Living clients of HDFS (For eg. OOZIE) use cached DFSClients which in turn use a cached KMSClientProvider to talk to KMS.
> Before an MR Job is run, the job client calls the {{DFClient.addDelegationTokens()}} method which calls {{addDelegationTokens()}} on the {{KMSClientProvider}} to get any delegation token associated to the user.
> Unfortunately, this call uses a cached {{DelegationTokenAuthenticationURL.Token}} instance which can cause the {{SignerSecretProvider}} implementation of the {{AuthenticationFilter}} at the KMS Server end to fail validation. Which results in the MR job itself failing.



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