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https://issues.apache.org/jira/browse/HBASE-4847?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13160899#comment-13160899
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nkeywal commented on HBASE-4847:
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Well, as with this patch all small tests are executed in a shared jvm, we can
see some side effects. However, I ran these test more than 20 times, and it's
working in my env. I deactivated parallelism to avoid random results. So it's
strange.
I went to the debugger for TestMinVersions#testBaseCase, and it seems the only
to get this results is using a wrong EnvironmentEdgeManager. But I checked that
only the default is used for small tests. The patch v7 add a check & a reset
for the EnvironmentEdgeManager, I will see what are the results...
> Activate single jvm for small tests on jenkins
> ----------------------------------------------
>
> Key: HBASE-4847
> URL: https://issues.apache.org/jira/browse/HBASE-4847
> Project: HBase
> Issue Type: Improvement
> Components: build, test
> Affects Versions: 0.94.0
> Environment: build
> Reporter: nkeywal
> Assignee: nkeywal
> Priority: Minor
> Attachments: 4847_all.v4.patch, 4847_all.v5.patch, 4847_all.v6.patch,
> 4847_all.v6.patch, 4847_all.v7.patch, 4847_pom.patch, 4847_pom.v2.patch,
> 4847_pom.v2.patch, 4847_pom.v2.patch, 4847_pom.v3.patch
>
>
> This will not revolutionate performances alone. We will win between 1 to 4
> minutes.
> But we win as well:
> - it's a step for parallelizing the tests
> - new tests are less expensive as they do not create a new jvm: it's a
> continuous win
> - it will allow to push it on dev env while having the same env on dev & on
> build, and 3 minutes are 10% of small + medium tests execution time.
> I will do a few "submit patch" to see if it works well before asking for the
> real commit.
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