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https://issues.apache.org/jira/browse/DERBY-4306?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12734641#action_12734641
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Mamta A. Satoor commented on DERBY-4306:
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I ran derbyall again, once without my changes and once again with my changes
and both the times, I didn't see the errors that I mentioned on 22/Jul/09. So I
will assume that those were intermittent failures and go ahead and checkin the
fix which fixes NPE by first checking for nullability.
> NullPointerException in JMXManagementService.unregisterMBean when running
> jdbcapi._Suite
> ----------------------------------------------------------------------------------------
>
> Key: DERBY-4306
> URL: https://issues.apache.org/jira/browse/DERBY-4306
> Project: Derby
> Issue Type: Bug
> Components: JMX
> Affects Versions: 10.5.2.0, 10.6.0.0
> Reporter: Tiago R. Espinha
> Attachments: DERBY4306_checkForNullability_patch1_diff.txt,
> JMX_NPE_AuthenticationTest.tar.gz, JMXNPE.tar.gz, ReproDerby4306.java
>
>
> I consistently get a NullPointerException when I run the jdbcapi suite:
> java.lang.NullPointerException
> at
> org.apache.derby.impl.services.jmx.JMXManagementService.unregisterMBean(JMXManagementService.java:286)
> at
> org.apache.derby.impl.services.jmx.JMXManagementService.unregisterMBean(JMXManagementService.java:277)
> at
> org.apache.derby.impl.drda.NetworkServerControlImpl.blockingStart(NetworkServerControlImpl.java:864)
> at sun.reflect.GeneratedMethodAccessor41.invoke(Unknown Source)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:597)
> at
> org.apache.derby.iapi.jdbc.DRDAServerStarter.run(DRDAServerStarter.java:236)
> at java.lang.Thread.run(Thread.java:619)
> I'm attaching the log folder from the jdbcapi run.
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