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https://issues.apache.org/jira/browse/HBASE-14954?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15048817#comment-15048817
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Ted Yu commented on HBASE-14954:
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Thanks for the patch, Victor
> IllegalArgumentException was thrown when doing online configuration change in
> CompactSplitThread
> ------------------------------------------------------------------------------------------------
>
> Key: HBASE-14954
> URL: https://issues.apache.org/jira/browse/HBASE-14954
> Project: HBase
> Issue Type: Bug
> Components: Compaction, regionserver
> Affects Versions: 1.1.2
> Reporter: Victor Xu
> Assignee: Victor Xu
> Fix For: 2.0.0, 1.2.0, 1.3.0, 1.1.3
>
> Attachments: HBASE-14954-v1.patch
>
>
> Online configuration change is a terrific feature for HBase administrators.
> However, when we use this feature to tune compaction thread pool size online,
> it triggered a IllegalArgumentException. The cause is the order of
> setMaximumPoolSize() and setCorePoolSize() of ThreadPoolExecutor: when
> turning parameters bigger, we should setMax first; when turning parameters
> smaller, we need to setCore first. Besides, there is also a copy-code bug in
> merge and split thread pool which I will fix together.
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