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https://issues.apache.org/jira/browse/DERBY-4852?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13004889#comment-13004889
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Kathey Marsden commented on DERBY-4852:
---------------------------------------

I am wondering if there is a scenario where 
TestConfiguration.getNextAvailablePort() might get called in parallel. Since as 
far as I can tell, the first failure occurs when we should be using the port 
for the first time, I don't think it could hurt to synchronize access.  Even if 
that's not the problem it would be good in case there is some scenario of 
parallel use in the future.



> Lots of failures with Connection Refused, starting with 
> JMXtest.testDerbyRegisteredMBeansSimpleInfo on 10.6.2.3(1022806) codeline 
> while running Junit suite with ibm16 on windows machine
> -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: DERBY-4852
>                 URL: https://issues.apache.org/jira/browse/DERBY-4852
>             Project: Derby
>          Issue Type: Bug
>          Components: Test
>    Affects Versions: 10.6.2.3
>            Reporter: Mamta A. Satoor
>            Assignee: Kathey Marsden
>              Labels: derby_triage10_8
>         Attachments: 1022806-suites.All_diff.txt
>
>
> Last night's run of Junit with ibm16 on 10.6.2.3(1022806) codeline had 50 
> failures which all seem to be related to not being able to open a connection 
> to the localhost. The link to that run can be found at 
> http://people.apache.org/~myrnavl/derby_test_results/v10_6/windows/testSummary-1022806.html
> I will also attach the result of the run to this jira.

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