[jira] [Created] (HBASE-24072) Nightlies reporting OutOfMemoryError: unable to create new native thread

["Michael Stack (Jira)" <ji...@apache.org>]

Michael Stack created HBASE-24072:
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             Summary: 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: Bug
          Components: test
            Reporter: Michael Stack


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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