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https://issues.apache.org/jira/browse/HBASE-5897?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13265462#comment-13265462
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Hadoop QA commented on HBASE-5897:
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-1 overall. Here are the results of testing the latest attachment
http://issues.apache.org/jira/secure/attachment/12525125/testRegionServerCoprocessorExceptionWithRemove.stack
against trunk revision .
+1 @author. The patch does not contain any @author tags.
+1 tests included. The patch appears to include 6 new or modified tests.
-1 patch. The patch command could not apply the patch.
Console output:
https://builds.apache.org/job/PreCommit-HBASE-Build/1697//console
This message is automatically generated.
> prePut coprocessor hook causing substantial CPU usage
> -----------------------------------------------------
>
> Key: HBASE-5897
> URL: https://issues.apache.org/jira/browse/HBASE-5897
> Project: HBase
> Issue Type: Bug
> Affects Versions: 0.92.0
> Reporter: Todd Lipcon
> Assignee: Todd Lipcon
> Priority: Critical
> Fix For: 0.92.2, 0.94.0, 0.96.0
>
> Attachments: 5897-simple.txt, hbase-5897.txt,
> testRegionServerCoprocessorExceptionWithRemove.stack
>
>
> I was running an insert workload against trunk under oprofile and saw that a
> significant portion of CPU usage was going to calling the "prePut"
> coprocessor hook inside doMiniBatchPut, even though I don't have any
> coprocessors installed. I ran a million-row insert and collected CPU time
> spent in the RS after commenting out the preput hook, and found CPU usage
> reduced by 33%.
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