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https://issues.apache.org/jira/browse/HBASE-24072?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17083792#comment-17083792
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Michael Stack commented on HBASE-24072:
---------------------------------------
Found that HBASE-23956 Use less resources running tests (#1266) was missing off
branch-2.3. Added it (and the correction HBASE-23987 NettyRpcClientConfigHelper
will not share event loop by default which is incorrect (#1288)). Lets see if
that helps.
> Nightlies reporting OutOfMemoryError: unable to create new native thread
> ------------------------------------------------------------------------
>
> Key: HBASE-24072
> URL: https://issues.apache.org/jira/browse/HBASE-24072
> Project: HBase
> Issue Type: Task
> Components: test
> Reporter: Michael Stack
> Assignee: Michael Stack
> Priority: Major
> Fix For: 3.0.0, 2.3.0
>
> Attachments:
> 0001-HBASE-24072-Nightlies-reporting-OutOfMemoryError-una.patch,
> print_ulimit.patch
>
>
> Seeing this kind of thing in nightly...
> {code}
> java.lang.RuntimeException: java.lang.OutOfMemoryError: unable to create new
> native thread
> at
> org.apache.hadoop.hbase.mapreduce.TestMultithreadedTableMapper.beforeClass(TestMultithreadedTableMapper.java:83)
> Caused by: java.lang.OutOfMemoryError: unable to create new native thread
> at
> org.apache.hadoop.hbase.mapreduce.TestMultithreadedTableMapper.beforeClass(TestMultithreadedTableMapper.java:83)
> {code}
> Chatting w/ Nick and Huaxiang, doing the math, we are likely oversubscribing
> our docker container. It is set to 20G (The hosts are 48G). Fork count is
> 0.5C on a 16 CPU machine which is 8 *2.8G our current forked jvm size. Add
> the maven 4G and we could be over the top.
> Play w/ downing the fork size (in earlier study we didn't seem to need this
> much RAM when running a fat long test). Let me also take th ms off the mvn
> allocation to see if that helps.
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