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https://issues.apache.org/jira/browse/HBASE-10119?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Benoit Sigoure updated HBASE-10119:
-----------------------------------
Attachment: HBASE-10119.patch
Tentative patch to address the issue by making sure we call the coprocessor's
{{stop()}} when forcefully removing it. This is the patch I'm using in
production right now, it's working well for me. Sorry I didn't have time to
write the accompanying test.
> Allow HBase coprocessors to clean up when they fail
> ---------------------------------------------------
>
> Key: HBASE-10119
> URL: https://issues.apache.org/jira/browse/HBASE-10119
> Project: HBase
> Issue Type: New Feature
> Affects Versions: 0.96.0
> Reporter: Benoit Sigoure
> Attachments: HBASE-10119.patch
>
>
> In the thread [Giving a chance to buggy coprocessors to clean
> up|http://osdir.com/ml/general/2013-12/msg17334.html] I brought up the issue
> that coprocessors currently don't have a chance to release their own
> resources (be they internal resources within the JVM, or external resources
> elsewhere) when they get forcefully removed due to an uncaught exception
> escaping.
> It would be nice to fix that, either by adding an API called by the
> {{CoprocessorHost}} when killing a faulty coprocessor, or by guaranteeing
> that the coprocessor's {{stop()}} method will be invoked then.
> This feature request is actually pretty important due to bug HBASE-9046,
> which means that it's not possible to properly clean up a coprocessor without
> restarting the RegionServer (!!).
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