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https://issues.apache.org/jira/browse/DIRMINA-804?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13089556#comment-13089556
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Alexander Temerev commented on DIRMINA-804:
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I can confirm this bug happening both on Ubuntu Server and Mac OS X. Very
annoying, actually, because I cannot restart my production server for minutes.
> NioDatagramAcceptor.unbind does not unbind cleanly
> --------------------------------------------------
>
> Key: DIRMINA-804
> URL: https://issues.apache.org/jira/browse/DIRMINA-804
> Project: MINA
> Issue Type: Bug
> Components: Transport
> Affects Versions: 2.0.0
> Environment: Windows 7
> Reporter: Zhou
> Fix For: 2.0.5
>
>
> Steps to reproduce:
> 1. Use below code.
> NioDatagramAcceptor acceptor = new NioDatagramAcceptor();
> acceptor.setHandler(new IoHandlerAdapter());
> SocketAddress localAddress = new InetSocketAddress("localhost",9001);
> acceptor.bind(localAddress);
> acceptor.unbind(localAddress);
> 2. use debugger to step over here after unbind() call but before exiting the
> process
> 3. use netstat to check current UDP sockets. you can find port 9001 not
> released yet.
> Possible solution: invoke selector.selectNow() after closing the channel.
> @Override
> protected void close(DatagramChannel handle) throws Exception {
> SelectionKey key = handle.keyFor(selector);
> if (key != null) {
> key.cancel();
> }
>
> handle.disconnect();
> handle.close();
> selector.selectNow();
> }
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