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https://issues.apache.org/jira/browse/CXF-3429?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13012825#comment-13012825
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David Liu commented on CXF-3429:
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Thanks Willem.
> ServerImpl should shutdown Destination before setMessageObserver=null
> ---------------------------------------------------------------------
>
> Key: CXF-3429
> URL: https://issues.apache.org/jira/browse/CXF-3429
> Project: CXF
> Issue Type: Bug
> Components: Core
> Affects Versions: 2.2.10
> Reporter: David Liu
> Assignee: Willem Jiang
> Fix For: 2.4, 2.3.4
>
>
> Hi,
> During shutdown the CXF server, we encounter the NullPointerException from
> time to time.
> The issue is that ServerImpl will set MessageObserver to null, and then it
> shutdown desination. however, if the server is multi-thread and probably some
> thread is runing, then it can result in NullPointerException because
> MessageObserver is null.
> Can we fix this bug by shutdown the Destination first and then set
> MessageObserver to null?
>
> Also, do we have a workaround for this issue?
> {code}
> public class ServerImpl implements Server {
> public void stop() {
> LOG.fine("Server is stopping.");
> ...
> getDestination().setMessageObserver(null);
> getDestination().shutdown();
> }
> {code}
> David
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