[jira] [Resolved] (CXF-3429) ServerImpl should shutdown Destination before setMessageObserver=null

["Willem Jiang (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CXF-3429?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Willem Jiang resolved CXF-3429.
-------------------------------

       Resolution: Fixed
    Fix Version/s: 2.3.4
                   2.4

Applied patch into trunk  and 2.3.x-fixes branch.

> 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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