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From "David Liu (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CXF-3429) ServerImpl should shutdown Destination before setMessageObserver=null
Date Wed, 30 Mar 2011 02:44:05 GMT

    [ https://issues.apache.org/jira/browse/CXF-3429?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13012825#comment-13012825
] 

David Liu commented on CXF-3429:
--------------------------------

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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