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From "Knut Anders Hatlen (JIRA)" <j...@apache.org>
Subject [jira] [Created] (DERBY-5964) Timestamp comparison failure in AutomaticIndexStatisticsTest.testStatisticsCorrectness
Date Mon, 29 Oct 2012 11:07:14 GMT
Knut Anders Hatlen created DERBY-5964:
-----------------------------------------

             Summary: Timestamp comparison failure in AutomaticIndexStatisticsTest.testStatisticsCorrectness
                 Key: DERBY-5964
                 URL: https://issues.apache.org/jira/browse/DERBY-5964
             Project: Derby
          Issue Type: Bug
          Components: Test
    Affects Versions: 10.10.0.0
            Reporter: Knut Anders Hatlen
            Priority: Minor


http://dbtg.foundry.sun.com/derby/test/Daily/jvm1.5/testing/testlog/lin/1402814-suitesAll_diff.txt

1) testStatisticsCorrectness(org.apache.derbyTesting.functionTests.tests.store.AutomaticIndexStatisticsTest)junit.framework.AssertionFailedError
	at org.apache.derbyTesting.functionTests.tests.store.AutomaticIndexStatisticsTest.testStatisticsCorrectness(AutomaticIndexStatisticsTest.java:324)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at org.apache.derbyTesting.junit.BaseTestCase.runBare(BaseTestCase.java:117)
	at org.apache.derbyTesting.junit.BaseJDBCTestCase.runBareOverridable(BaseJDBCTestCase.java:424)
	at org.apache.derbyTesting.junit.BaseJDBCTestCase.runBare(BaseJDBCTestCase.java:441)
	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)

The failure is caused by this assert:

            assertTrue(s.created.before(now));

It might be a coincidence, but it happened the same night as Europe was switching from DST.

It may also be related to DERBY-5046, where a similar assert failed because poor clock resolution
made the two timestamps equal.

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