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https://issues.apache.org/jira/browse/DERBY-3561?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12582686#action_12582686
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John H. Embretsen commented on DERBY-3561:
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I am only able to reproduce this failure when running suites.All, or a subset
of it, before running the ManagementMBeanTest. Running the management suite by
itself does not result in a failure.
It seems to me that when connecting directly to the platform MBean server in
the same JVM, there is a set of MBeans from a different Derby system available,
as indicated by the extra debugging output I added:
initial: org.apache.derby:type=Management
initial:
org.apache.derby:system=c013800d-0118-f0c9-77c9-00004d1fe320,type=Management
initial:
org.apache.derby:jar=derby.jar,system=c013800d-0118-f0c9-9143-00004d1fe320,type=Version
initial: org.apache.derby:system=c013800d-0118-f0c9-77c9-00004d1fe320,type=JDBC
initial: org.apache.derby:system=c013800d-0118-f0c9-9143-00004d1fe320,type=JDBC
initial:
org.apache.derby:jar=derbynet.jar,system=c013800d-0118-f0c9-9143-00004d1fe320,type=Version
initial:
org.apache.derby:jar=derby.jar,system=c013800d-0118-f0c9-77c9-00004d1fe320,type=Version
initial:
org.apache.derby:system=c013800d-0118-f0c9-9143-00004d1fe320,type=NetworkServer
initial:
org.apache.derby:system=c013800d-0118-f0c9-9143-00004d1fe320,type=Management
DerbyMBeanCount after no-op startMgmt: 9
DerbyMBeanCount after stop: 5
after stop: org.apache.derby:type=Management
after stop:
org.apache.derby:jar=derby.jar,system=c013800d-0118-f0c9-77c9-00004d1fe320,type=Version
after stop:
org.apache.derby:system=c013800d-0118-f0c9-77c9-00004d1fe320,type=Management
after stop:
org.apache.derby:system=c013800d-0118-f0c9-77c9-00004d1fe320,type=JDBC
after stop:
org.apache.derby:system=c013800d-0118-f0c9-9143-00004d1fe320,type=Management
testStartStopManagementFromApplication used 24 ms F
I have reduced the number of tests needed to reproduce the failure to a suite
consisting of:
suite.addTest(org.apache.derbyTesting.functionTests.tests.derbynet.NSinSameJVMTest.suite());
suite.addTest(org.apache.derbyTesting.functionTests.tests.derbynet.ServerPropertiesTest.suite());
suite.addTest(org.apache.derbyTesting.functionTests.tests.management.ManagementMBeanTest.suite());
in that specific order. Looking closer at those tests might reveal something.
> testStartStopManagementFromApplication(org.apache.derbyTesting.functionTests.tests.management.ManagementMBeanTest)junit.framework.AssertionFailedError:
> expected:<2> but was:<5>
> --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
>
> Key: DERBY-3561
> URL: https://issues.apache.org/jira/browse/DERBY-3561
> Project: Derby
> Issue Type: Bug
> Components: Regression Test Failure
> Affects Versions: 10.5.0.0
> Reporter: Mike Matrigali
>
> The following test has been failing consistently in the tinderbox runs since
> about build 636714, unfortunately the run right before this build failed so
> it may be from that one.
> first tinderbox failure I could find:
> http://dbtg.thresher.com/derby/test/tinderbox_trunk16/jvm1.6/testing/testlog/SunOS-5.10_i86pc-i386/636714-org.apache.derbyTesting.functionTests.suites.All_diff.txt
> most recent as of this report:
> http://dbtg.thresher.com/derby/test/tinderbox_trunk16/jvm1.6/testing/testlog/SunOS-5.10_i86pc-i386/639156-org.apache.derbyTesting.functionTests.suites.All_diff.txt
> There was 1 failure:
> 1)
> testStartStopManagementFromApplication(org.apache.derbyTesting.functionTests.tests.management.ManagementMBeanTest)junit.framework.AssertionFailedError:
> expected:<2> but was:<5>
> at
> org.apache.derbyTesting.functionTests.tests.management.ManagementMBeanTest.startStopManagement(ManagementMBeanTest.java:86)
> at
> org.apache.derbyTesting.functionTests.tests.management.ManagementMBeanTest.testStartStopManagementFromApplication(ManagementMBeanTest.java:56)
> 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:101)
> 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 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)
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