[DIRMINA-804] NioDatagramAcceptor.unbind does not unbind cleanly

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Cannot Reproduce
• Affects Version/s: 2.0.0
• Fix Version/s: 2.0.8
• Component/s: Transport
• Environment: Windows 7
• Assignee: Unassigned
• Reporter: Zhou
• Created: 26/Oct/10 04:44
• Updated: 08/Sep/14 08:01
• Resolved: 08/Sep/14 08:01

Description

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();
    }