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https://issues.apache.org/jira/browse/HBASE-18902?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16185089#comment-16185089
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Ted Yu commented on HBASE-18902:
--------------------------------
Currently DummyRequest message is empty. I guess that was why Appy wrote 3
subtests since it is not easy to distinguish the 3 calls made in the subtests
on server side.
If we add an int field to DummyRequest message, different counters can be
incremented depending on the different values passed in DummyRequest.
This way only one subtest should suffice and we start / stop mini cluster once.
> 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, 18902.v2.txt, 18902.v3.txt,
> HBASE-18902.master.001.patch, 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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