Intermittent failure in lang/deadlockMode.java
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Key: DERBY-2799
URL: https://issues.apache.org/jira/browse/DERBY-2799
Project: Derby
Issue Type: Bug
Components: Regression Test Failure, Test
Affects Versions: 10.3.0.0
Reporter: Knut Anders Hatlen
Priority: Minor
I sometimes see the deadlockMode test fail with this error:
There was 1 failure:
1)
deadlockMode(org.apache.derbyTesting.functionTests.tests.lang.LangHarnessJavaTest)junit.framework.ComparisonFailure:
Output at line 18 expected:<[Starting t]hread> but was:<[Done T]hread>
at
org.apache.derbyTesting.functionTests.util.CanonTestCase.compareCanon(CanonTestCase.java:100)
at
org.apache.derbyTesting.functionTests.util.HarnessJavaTest.runTest(HarnessJavaTest.java:91)
at
org.apache.derbyTesting.junit.BaseTestCase.runBare(BaseTestCase.java:88)
at junit.extensions.TestDecorator.basicRun(TestDecorator.java:24)
at junit.extensions.TestSetup$1.protect(TestSetup.java:21)
at junit.extensions.TestSetup.run(TestSetup.java:25)
at junit.extensions.TestDecorator.basicRun(TestDecorator.java:24)
at junit.extensions.TestSetup$1.protect(TestSetup.java:21)
at junit.extensions.TestSetup.run(TestSetup.java:25)
at
org.apache.derbyTesting.junit.BaseTestSetup.run(BaseTestSetup.java:57)
at junit.extensions.TestDecorator.basicRun(TestDecorator.java:24)
at junit.extensions.TestSetup$1.protect(TestSetup.java:21)
at junit.extensions.TestSetup.run(TestSetup.java:25)
at
org.apache.derbyTesting.junit.BaseTestSetup.run(BaseTestSetup.java:57)
at
org.apache.derbyTesting.functionTests.tests.lang.LangHarnessJavaTest.main(LangHarnessJavaTest.java:102)
Similar failures have also been seen in the nightly testing, for instance
<URL:http://dbtg.thresher.com/derby/test/trunk15/jvm1.5/testing/testlog/Linux-2.6.17-1.2174_FC5_i686-i686/484695-derbyall_diff.txt>.
It looks like a timing issue between the threads in the test. The test starts
20 threads, and each thread prints "Starting thread" when it starts and "Done
Thread" when it ends. If a thread finishes before all threads have started, the
lines in the output are mixed, and the test fails.
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