环境：jxse-2.7, netty-3.6.6.Final　　

现象：每次执行都抛出以下异常

八月 08, 2013 8:45:19 下午 net.jxta.logging.Logging logCheckedInfo
INFO: Line 127 net.jxta.impl.endpoint.netty.NettyTransportServer.bindServerChannel()
Attempt to bind to /0.0.0.0:8080 failed (Address already in use: bind), trying another address
八月 08, 2013 8:45:19 下午 org.jboss.netty.channel.SimpleChannelUpstreamHandler
WARNING: EXCEPTION, please implement org.jboss.netty.channel.socket.httptunnel.TunnelWrappedServerChannelHandler.exceptionCaught() for proper handling.
java.net.BindException: Address already in use: bind
    at sun.nio.ch.Net.bind0(Native Method)
    at sun.nio.ch.Net.bind(Net.java:444)
    at sun.nio.ch.Net.bind(Net.java:444)
    at sun.nio.ch.Net.bind(Net.java:436)
    at sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:214)
    at sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java:74)
    at org.jboss.netty.channel.socket.nio.NioServerBoss$RegisterTask.run(NioServerBoss.java:193)
    at org.jboss.netty.channel.socket.nio.AbstractNioSelector.processTaskQueue(AbstractNioSelector.java:366)
    at org.jboss.netty.channel.socket.nio.AbstractNioSelector.run(AbstractNioSelector.java:290)
    at org.jboss.netty.channel.socket.nio.NioServerBoss.run(NioServerBoss.java:42)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
    at java.lang.Thread.run(Thread.java:724)

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注意到黄色背景文字，显然8080端口被占用了；才想起最近安装Oracle Database 11g Express Edition，在安装时必须占用8080端口且无法修改。

停止Oracle服务，或按照《http://www.cnblogs.com/cuizhf/p/3246654.html》修改其端口。

上面的异常也说明Jxta绑定了8080端口（Why？），下面是NettyTransportServer初始化时的代码：

    private void initServer(TCPAdv instanceConfiguration) throws PeerGroupException {

        this.serverEnabled = instanceConfiguration.isServerEnabled();

        if(!serverEnabled) {

            this.server = new NullTransportServerComponent();

            return;

        }

        String interfaceAddress = instanceConfiguration.getInterfaceAddress();

        InetAddress bindAddr;

        if(interfaceAddress != null) {

            bindAddr = TransportUtils.resolveInterfaceAddress(interfaceAddress);

        } else {

            bindAddr = IPUtils.ANYADDRESS;

        }

        String publicName = instanceConfiguration.getServer();

        EndpointAddress publicAddress = null;

        if (publicName != null) {

            publicAddress = new EndpointAddress(protocolName, publicName, null, null);

        }

        NettyTransportServer server = new NettyTransportServer(createServerSocketChannelFactory(), new InetSocketAddressTranslator(protocolName), group);

        int preferredPort = correctPort(instanceConfiguration.getPort(), 1, 65535, getDefaultPort(), getDefaultPort(), "Preferred");

        int startPort = correctPort(instanceConfiguration.getStartPort(), 1, preferredPort, getDefaultPortRangeLowerBound(), 1, "Range start");

        int endPort = correctPort(instanceConfiguration.getEndPort(), startPort, 65535, getDefaultPortRangeUpperBound(), 65535, "Range end");

        List<InetSocketAddress> potentialBindpoints = IPUtils.createRandomSocketAddressList(bindAddr, preferredPort, startPort, endPort);

        server.init(potentialBindpoints, publicAddress, instanceConfiguration.getPublicAddressOnly());

        this.server = server;

    }