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From "Mamta A. Satoor (JIRA)" <j...@apache.org>
Subject [jira] Commented: (DERBY-4304) Network Server shutdown should handle exceptions and finish the server shutdown completely
Date Tue, 21 Jul 2009 16:22:14 GMT

    [ https://issues.apache.org/jira/browse/DERBY-4304?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12733691#action_12733691
] 

Mamta A. Satoor commented on DERBY-4304:
----------------------------------------

I had finished running the junit suite before checking in and that ran fine with only one
known failure DERBY-4307 testRunTests. derbyall had not finished before I checked in. It just
finished and I see one NPE which may be same as DERBY-4306. I will investigate further into
it. The NPE stack trace is as follows
The failing test is DerbyNetAutoStart
Starting test case 1.
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:892)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:37)
	at java.lang.reflect.Method.invoke(Method.java:599)
	at org.apache.derby.iapi.jdbc.DRDAServerStarter.run(DRDAServerStarter.java:236)
	at java.lang.Thread.run(Thread.java:735)
Starting test case 2.
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:892)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:37)
	at java.lang.reflect.Method.invoke(Method.java:599)
	at org.apache.derby.iapi.jdbc.DRDAServerStarter.run(DRDAServerStarter.java:236)
	at java.lang.Thread.run(Thread.java:735)


> Network Server shutdown should handle exceptions and finish the server shutdown completely
> ------------------------------------------------------------------------------------------
>
>                 Key: DERBY-4304
>                 URL: https://issues.apache.org/jira/browse/DERBY-4304
>             Project: Derby
>          Issue Type: Improvement
>          Components: Network Server
>    Affects Versions: 10.6.0.0
>            Reporter: Mamta A. Satoor
>            Assignee: Mamta A. Satoor
>         Attachments: DERBY4304_handleExceptions_patch1_diff.txt
>
>
> While working on DERBY-4053, found that an exception from Connection.close was not handled
properly by the server shutdown code which caused a new instance server startup to hang. Resolved
the problem with Connection close but in general, we should
> 1) Make sure an exception during shutdown processing does not prevent the remaining shutdown
tasks, like closing the server socket from occurring. 
> 2) Make sure any exceptions that occur in shutdown processing are reported to the console.


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