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Kathey Marsden commented on DERBY-4085:
---------------------------------------

I saw the following failure with IBM 1.4.2 on trunk, Linux. Should I just post it here or open a separate issue?

1) testClusMogInMemory(org.apache.derbyTesting.functionTests.tests.memorydb.MogTest)junit.framework.AssertionFailedError: Error too big;6.911593155944432E-4 >= 1.0E-6, seed=1240288888777
	at org.apache.derbyTesting.functionTests.tests.memorydb.MogTest.compare(MogTest.java:159)
	at org.apache.derbyTesting.functionTests.tests.memorydb.MogTest.doTestClusMog(MogTest.java:143)
	at org.apache.derbyTesting.functionTests.tests.memorydb.MogTest.testClusMogInMemory(MogTest.java:72)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java(Compiled Code))
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java(Compiled Code))
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java(Compiled Code))
	at org.apache.derbyTesting.junit.BaseTestCase.runBare(BaseTestCase.java(Compiled Code))
	at junit.extensions.TestDecorator.basicRun(TestDecorator.java:22)
	at junit.extensions.TestSetup$1.protect(TestSetup.java:19)
	at junit.extensions.TestSetup.run(TestSetup.java:23)
	at org.apache.derbyTesting.junit.BaseTestSetup.run(BaseTestSetup.java:57)






> Improve testing of the in-memory back end
> -----------------------------------------
>
>                 Key: DERBY-4085
>                 URL: https://issues.apache.org/jira/browse/DERBY-4085
>             Project: Derby
>          Issue Type: Sub-task
>          Components: Test
>    Affects Versions: 10.5.0.0
>            Reporter: Kristian Waagan
>            Assignee: Kristian Waagan
>             Fix For: 10.6.0.0
>
>         Attachments: buildbreak.diff, derby-4085-1a-basic_tests.diff, derby-4085-1a-basic_tests.stat, derby-4085-1b-basic_tests.diff, derby-4085-2a-mog_func_test.diff, derby-4085-2a-mog_func_test.stat, derby-4085-3a-enable_in_suitesAll.diff, derby-4085-4a-improved_assertion_reporting.diff, derby-4085-5a-report_seed_on_failure.diff
>
>
> The in-memory back end should be tested as part of the standard regression tests.
> The following is a good start:
>  o simple create / boot test
>  o create in-memory db, backup, restore with default storage engine, modify, restore with createFrom into memory again
>  o add the functional test(s) written by Cheng
>  o more unit tests
> On a longer term, we should consider to add the possibility to run all or a subset of the general regression tests with the in-memory back end.

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