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https://issues.apache.org/jira/browse/PHOENIX-3175?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15480360#comment-15480360
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James Taylor commented on PHOENIX-3175:
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Would you have some cycles to check this in, [~elserj]?
> Unnecessary UGI proxy user impersonation check
> ----------------------------------------------
>
> Key: PHOENIX-3175
> URL: https://issues.apache.org/jira/browse/PHOENIX-3175
> Project: Phoenix
> Issue Type: Bug
> Reporter: Josh Elser
> Assignee: Josh Elser
> Fix For: 4.9.0, 4.8.1
>
> Attachments: PHOENIX-3175.001.patch
>
>
> While looking at some issues reported by [~jpplayer], we found that some of
> the default Hadoop proxyuser configuration properties in core-site.xml
> weren't working as intended.
> [~devaraj]'s keen eye noticed that PQS was doing an unnecessary UGI ProxyUser
> impersonation check.
> We can rely on the SPNEGO authentication as the barrier to use PQS, but then
> defer to the impersonation check that HBase is already doing as to which PQS
> instances are allowed to talk to HBase (defined by core-site.xml).
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