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https://issues.apache.org/jira/browse/DERBY-4053?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12730586#action_12730586
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Mamta A. Satoor commented on DERBY-4053:
----------------------------------------

I looked through derby.log and see that it has observers error in derby.log
[main] FAIL - org.apache.derby.shared.common.sanity.AssertFailure: ASSERT 
FAILED There should be 0 observers, but we still have 1 observers.
org.apache.derby.shared.common.sanity.AssertFailure: ASSERT FAILED There should 
be 0 observers, but we still have 1 observers.
        at 
org.apache.derby.shared.common.sanity.SanityManager.THROWASSERT(SanityManager.java:162)
        at 
org.apache.derby.shared.common.sanity.SanityManager.THROWASSERT(SanityManager.java:147)
        at org.apache.derby.impl.store.raw.xact.Xact.doComplete(Xact.java:1969)
        at org.apache.derby.impl.store.raw.xact.Xact.preComplete(Xact.java:1925)
        at 
org.apache.derby.impl.store.raw.xact.Xact.prepareCommit(Xact.java:769)
        at org.apache.derby.impl.store.raw.xact.Xact.commit(Xact.java:882)
        at org.apache.derby.impl.store.raw.xact.Xact.commit(Xact.java:679)
        at 
org.apache.derbyTesting.unitTests.store.T_Util.t_commit(T_Util.java:840)
        at 
org.apache.derbyTesting.unitTests.store.T_RawStoreFactory.TC001(T_RawStoreFactory.java:7310)
        at 
org.apache.derbyTesting.unitTests.store.T_RawStoreFactory.runTempTests(T_RawStoreFactory.java:417)
        at 
org.apache.derbyTesting.unitTests.store.T_RawStoreFactory.runTestSet(T_RawStoreFactory.java:248)
        at 
org.apache.derbyTesting.unitTests.harness.T_MultiIterations.runTests(T_MultiIterations.java:95)
        at 
org.apache.derbyTesting.unitTests.harness.T_MultiThreadedIterations.runTests(T_MultiThreadedIterations.java:92)
        at 
org.apache.derbyTesting.unitTests.harness.T_Generic.Execute(T_Generic.java:118)
        at 
org.apache.derbyTesting.unitTests.harness.BasicUnitTestManager.runATest(BasicUnitTestManager.java:184)
        at 
org.apache.derbyTesting.unitTests.harness.BasicUnitTestManager.runTests(BasicUnitTestManager.java:246)
        at 
org.apache.derbyTesting.unitTests.harness.BasicUnitTestManager.boot(BasicUnitTestManager.java:93)
        at 
org.apache.derby.impl.services.monitor.BaseMonitor.boot(BaseMonitor.java:2021)
        at 
org.apache.derby.impl.services.monitor.TopService.bootModule(TopService.java:333)
        at 
org.apache.derby.impl.services.monitor.BaseMonitor.bootService(BaseMonitor.java:1858)
        at 
org.apache.derby.impl.services.monitor.BaseMonitor.startServices(BaseMonitor.java:997)
        at 
org.apache.derby.impl.services.monitor.BaseMonitor.runWithState(BaseMonitor.java:429)
        at 
org.apache.derby.impl.services.monitor.FileMonitor.<init>(FileMonitor.java:60)
        at 
org.apache.derby.iapi.services.monitor.Monitor.startMonitor(Monitor.java:289)
        at 
org.apache.derbyTesting.unitTests.harness.UnitTestMain.main(UnitTestMain.java:51)


> suites.All hang with message java.net.BindException: Address already in use: 
> NET_Bind in derby.log 
> ---------------------------------------------------------------------------------------------------
>
>                 Key: DERBY-4053
>                 URL: https://issues.apache.org/jira/browse/DERBY-4053
>             Project: Derby
>          Issue Type: Bug
>          Components: Network Server, Test
>    Affects Versions: 10.5.1.1
>            Reporter: Kathey Marsden
>            Assignee: Mamta A. Satoor
>         Attachments: derby-4053_repro_dont_commit_diff.txt, derby.log, 
> DERBY4053_patch1_diff_July092009.txt, DERBY4053_patch2_diff_July102009.txt, 
> DERBY4053_patch2_stat_July102009.txt, DERBY4053_patch3_diff_July102009.txt, 
> DERBY4053_patch3_stat_July102009.txt, javacore-20090420-1735.txt, 
> javacore.20090211.123031.4000.0001.txt, mamtaDerby4053.java, suites.All.out
>
>
> Running suites.All with IBM 1.5  on 10.5.0.0 alpha - (743198)  I got a hang 
> in the test run.  The last test to run successfully was 
> xtestNestedSavepoints, but I am not sure exactly what test caused  the hang.  
> I took a thread dump which I will attach, which showed network server up and 
> running but no ClientThread and a ping attempt blocked.
> This hang is very similar to the hang that was seen after the fix attempts 
> for DERBY-1465 but that change was backed out so it is not related to that 
> change.   It could be that the change for DERBY-1465 just made this highly 
> intermittent problem more likely.

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