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Posted to dev@openjpa.apache.org by "Mark Struberg (JIRA)" <ji...@apache.org> on 2010/11/30 10:15:10 UTC
[jira] Updated: (OPENJPA-1898) TestQueryMultiThreaded fails with
OOME "unable to create new native thread"
[ https://issues.apache.org/jira/browse/OPENJPA-1898?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Mark Struberg updated OPENJPA-1898:
-----------------------------------
Attachment: OPENJPA-1898.patch
reduce parallel threads from 1000 to 800. Now it's not very likely that any user hits the default 1024 threads limit, but we still have enough parallel loops running
> TestQueryMultiThreaded fails with OOME "unable to create new native thread"
> ---------------------------------------------------------------------------
>
> Key: OPENJPA-1898
> URL: https://issues.apache.org/jira/browse/OPENJPA-1898
> Project: OpenJPA
> Issue Type: Bug
> Affects Versions: 2.0.1
> Reporter: Mark Struberg
> Attachments: OPENJPA-1898.patch
>
>
> here comes the stacktrace:
> <error message="unable to create new native thread" type="java.lang.OutOfMemoryError">java.lang.OutOfMemoryError: unable to create new native thread
> at java.lang.Thread.start0(Native Method)
> at java.lang.Thread.start(Thread.java:597)
> at org.apache.openjpa.slice.TestQueryMultiThreaded.testHeavyLoad(TestQueryMultiThreaded.java:236)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:597)
> at junit.framework.TestCase.runTest(TestCase.java:154)
> reducing the thread count to 800 should help to prevent this problem. This might be caused to the 1024 processes ulimit on most linux installations.
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