[DERBY-5440] test failure in testBTreeForwardScan_fetchRows_resumeAfterWait_nonUnique_split(org.apache.derbyTesting.functionTests.tests.store.IndexSplitDeadlockTest)junit.framework.AssertionFailedError: expected:<1> but was:<0>

• Type: Bug
• Status: Closed
• Priority: Trivial
• Resolution: Fixed
• Affects Version/s: 10.8.2.2
• Fix Version/s: 10.8.3.0, 10.9.1.0
• Component/s: Test
• Environment: IBM iseries 6.1, Classic 1.6 JVM
• Bug behavior facts: Regression Test Failure
• Assignee: Knut Anders Hatlen
• Reporter: Myrna van Lunteren
• Created: 30/Sep/11 19:43
• Updated: 15/Nov/13 08:15
• Resolved: 11/Oct/11 12:57

Description

During the QA Cycle for 10.8.2.1 I also ran on a next version of the iseries OS, and saw this failure. It did not reproduce when I reran the test by itself. The test has the following comment:
// Give the other thread time to obtain the lock
Thread.sleep(1000);

// Perform an index scan. Will be blocked for a while when fetching
// the row where x=100, but should be able to resume the scan.
ResultSet rs = s.executeQuery(
"select * from t --DERBY-PROPERTIES index=IDX");
for (int i = 0; i < 300; i++)

{ assertTrue(rs.next()); assertEquals(i, rs.getInt(1)); <==== this is the line of the failure. }

I think this is a rather slow machine, and that's likely why I saw the failure, perhaps the sleep wasn't long enough on this machine.
Here is the stack trace:

1) testBTreeForwardScan_fetchRows_resumeAfterWait_nonUnique_split(org.apache.derbyTesting.functionTests.tests.store.IndexSplitDeadlockTest)junit.framework.AssertionFailedError: expected:<1> but was:<0>
at java.lang.Throwable.<init>(Throwable.java:195)
at java.lang.Error.<init>(Error.java:49)
at junit.framework.AssertionFailedError.<init>(AssertionFailedError.java:13)
at org.apache.derbyTesting.functionTests.tests.store.IndexSplitDeadlockTest.testBTreeForwardScan_fetchRows_resumeAfterWait_nonUnique_split(IndexSplitDeadlockTest.java:526)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:27)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at org.apache.derbyTesting.junit.BaseTestCase.runBare(BaseTestCase.java:92)
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)

derby.log has no useful info.

Issue Links

• relates to: DERBY-5278 AssertionFailedError in IndexSplitDeadlockTest.testBTreeForwardScan_fetchRows_resumeAfterWait_unique_split()