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https://issues.apache.org/jira/browse/HBASE-4847?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13162328#comment-13162328
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nkeywal commented on HBASE-4847:
--------------------------------
We're leaking threads in the tests actually. It seems that hadoop-qa is less
tolerant than my env; but the issue is real.
Here is a snapshot.
{noformat}
main.logSyncer
main.logSyncer
main.logSyncer
Signal Dispatcher
main.logSyncer
main.logSyncer
Finalizer
main.logSyncer
main.logSyncer
mockserver.example.org,1234,-1.splitLogManagerTimeoutMonitor
LRU Statistics #0
Reference Handler
main.logSyncer
main
main.logSyncer
mockserver.example.org,1234,-1.splitLogManagerTimeoutMonitor
main.logSyncer
LruBlockCache.EvictionThread
main.logSyncer
main.logSyncer
main.logSyncer
main.logSyncer
main.logSyncer
main.logSyncer
main.logSyncer
{noformat}
main.logSyncer leaks when you don't close the hlog linked to a region. Many
tests closes the region but not the hlog, while some other closes nothing. The
patch v12 fixes some leaks, not all of them.
I will try anyway to limit it it to something not too large if not it won't be
possible to keep in sync with trunk...
> 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.v10.patch, 4847_all.v10.patch,
> 4847_all.v10.patch, 4847_all.v11.patch, 4847_all.v11.patch,
> 4847_all.v12.patch, 4847_all.v4.patch, 4847_all.v5.patch, 4847_all.v6.patch,
> 4847_all.v6.patch, 4847_all.v7.patch, 4847_all.v7.patch, 4847_all.v7.patch,
> 4847_all.v7.patch, 4847_all.v8.patch, 4847_all.v8.patch, 4847_all.v9.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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