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From "Andrew Purtell (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-16115) Missing security context in RegionObserver coprocessor when a compaction/split is triggered manually
Date Wed, 29 Jun 2016 04:43:45 GMT

    [ https://issues.apache.org/jira/browse/HBASE-16115?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15354522#comment-15354522
] 

Andrew Purtell commented on HBASE-16115:
----------------------------------------

Also, the doAs, while certainly reasonable to discuss changing now, were added to solve a
problem. It started with HBASE-14475. See also HBASE-14686. I don't really remember the context
of these decisions now but believe it was done to preserve expectations about the request
environment (effective user) after refactor of code since Coprocessors and security were introduced
in 0.92. 

> Missing security context in RegionObserver coprocessor when a compaction/split is triggered
manually
> ----------------------------------------------------------------------------------------------------
>
>                 Key: HBASE-16115
>                 URL: https://issues.apache.org/jira/browse/HBASE-16115
>             Project: HBase
>          Issue Type: Bug
>    Affects Versions: 0.98.20
>            Reporter: Lars Hofhansl
>
> We ran into an interesting phenomenon which can easily render a cluster unusable.
> We loaded some tests data into a test table and forced a manual compaction through the
UI. We have some compaction hooks implemented in a region observer, which writes back to another
HBase table when the compaction finishes. We noticed that this coprocessor is not setup correctly,
it seems the security context is missing.
> The interesting part is that this _only_ happens when the compaction is triggere through
the UI. Automatic compactions (major or minor) or when triggered via the HBase shell (folling
a kinit) work fine. Only the UI-triggered compactions cause this issues and lead to essentially
neverending compactions, immovable regions, etc.
> Not sure what exactly the issue is, but I wanted to make sure I capture this.
> [~apurtell], [~ghelmling], FYI.



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