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https://issues.apache.org/jira/browse/HBASE-18902?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16184722#comment-16184722
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Appy commented on HBASE-18902:
------------------------------
Since we change conf in test functions, i don't want conf polluted by one test
being used by others.
Have had serious waste of time in past when i was debugging some tests and the
root cause was sharing the conf of HBaseTestingUtility.
> TestCoprocessorServiceBackwardCompatibility fails in master branch
> ------------------------------------------------------------------
>
> Key: HBASE-18902
> URL: https://issues.apache.org/jira/browse/HBASE-18902
> Project: HBase
> Issue Type: Test
> Reporter: Ted Yu
> Assignee: Ted Yu
> Attachments: 18902.v1.txt, HBASE-18902.master.001.patch
>
>
> Starting mini cluster in subtests without shutting down resulted in:
> {code}
> java.lang.IllegalStateException: A mini-cluster is already running
> at
> org.apache.hadoop.hbase.coprocessor.TestCoprocessorServiceBackwardCompatibility.testCoprocessorServiceLoadedByRegion(TestCoprocessorServiceBackwardCompatibility.java:109)
> {code}
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