Right way to shutdown in case of error

[float_dublin]

Hello,
If i try to shutdown netty in exceptionCaught method it hangs forever,
searching this mail list shows i should do it in separate thread, is it the
only right way to close and release resources?

Code snippet to reproduce Connection Refused hang:

public class ClientTest {

    @ChannelPipelineCoverage("all")
    private class Client extends SimpleChannelHandler {

        @Override
        public void exceptionCaught(ChannelHandlerContext ctx, final
ExceptionEvent e) throws Exception {
            e.getCause().printStackTrace();
//            new Thread() {
//
//                @Override
//                public void run() {
                    e.getChannel().close().awaitUninterruptibly();
                    cb.releaseExternalResources();
//                }
//            }.start();
        }
    }
    ClientBootstrap cb = new ClientBootstrap(new
NioClientSocketChannelFactory(
            Executors.newCachedThreadPool(),
Executors.newCachedThreadPool()));

    private void initClient() {
        cb.setOption("tcpNoDelay", true);
        cb.setOption("keepAlive", true);

        final ChannelPipeline pipeline = cb.getPipeline();
        pipeline.addLast("handler", new Client());

        cb.connect(new InetSocketAddress("localhost", 20001)); // Assuming
nobody is home
    }

    public static void main(String[] args) {
        new ClientTest().initClient();
    }
}
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