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From "Mark Struberg (JIRA)" <j...@apache.org>
Subject [jira] Created: (OPENJPA-1898) TestQueryMultiThreaded fails with OOME "unable to create new native thread"
Date Mon, 29 Nov 2010 16:39:10 GMT
TestQueryMultiThreaded fails with OOME "unable to create new native thread"
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                 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


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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