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https://issues.apache.org/jira/browse/HBASE-16115?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15353948#comment-15353948
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Lars Hofhansl commented on HBASE-16115:
---------------------------------------

bq. at 
org.apache.hadoop.hbase.regionserver.compactions.Compactor$3.run(Compactor.java:360)

At least we know the passed user is not null (we'd see line 357 instead)

> 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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