[jira] [Commented] (HADOOP-11825) Move timelineclient Jersey+Kerberos+UGI support into a public implementation

["Arun Suresh (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HADOOP-11825?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14491152#comment-14491152 ] 

Arun Suresh commented on HADOOP-11825:
--------------------------------------

[~steve_l], was wondering if you had a chance to look at {{KMSClientProvider}}. Guess it also does a few things {{TimelineClientImpl}} does including retry/DTokens and doAs()... maybe we should consider merging that as well..

> Move timelineclient Jersey+Kerberos+UGI support into a public implementation
> ----------------------------------------------------------------------------
>
>                 Key: HADOOP-11825
>                 URL: https://issues.apache.org/jira/browse/HADOOP-11825
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: net
>    Affects Versions: 2.7.0
>            Reporter: Steve Loughran
>   Original Estimate: 4h
>  Remaining Estimate: 4h
>
> Having a SPNEGO authed Jersey REST client is a pre-requisite for REST operations against YARN applications and any other services in the Hadoop cluster which use Kerberos to auth, from code that uses UGI to manage identity.
> There's a multiple implementations of UGI+Http bindings in the code, with {{org.apache.hadoop.yarn.client.api.impl.TimelineClientImpl}}  being the one which provides Jersey client integration, and:
> # retry
> # delegation tokens
> # {{doAs()}} support
> It does all of this intermixed with the rest of the code, and is tagged as private.
> I propose pulling the jersey support out into a hadoop common .net class, tagging as public+evolving, to act as the foundation for any app that needs to use UGI+SPNEGO with jersey



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