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https://issues.apache.org/jira/browse/HBASE-11444?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Andrew Purtell updated HBASE-11444:
-----------------------------------
Summary: Remove use of reflection for User#getShortName (was: Remove use
of reflection in the User facade)
> Remove use of reflection for User#getShortName
> ----------------------------------------------
>
> Key: HBASE-11444
> URL: https://issues.apache.org/jira/browse/HBASE-11444
> Project: HBase
> Issue Type: Improvement
> Reporter: Andrew Purtell
> Assignee: Andrew Purtell
> Fix For: 0.99.0
>
> Attachments: HBASE-11444.patch, IntegrationTestIngestWithACL.svg
>
>
> The time we spend looking up a user's short name with User#getShortName in
> hot security code paths is mostly spent in Class#getMethod, ~70%. This is
> only ~1% of overall CPU time but is the bulk of time spent in
> AccessController#prePut, for example.
> Since HBase 1.0 is only going to support Hadoop 2, we can remove the use of
> reflection and replace with direct calls to UserGroupInformation, or remove
> the User facade and use UGI directly.
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