でこの例外が発生する理由を誰か教えてくださいsc.connect
( sc = ソケットチャネル)
/**
 * Verify socket is connected.  If not currently connected will attempt to connect
 * @return true if already connected or connection successfully established
 */
private synchronized boolean verifyConnection() {
    if (sc.isConnected()) {
        return true;
    }
    try {
        if (!sc.isOpen()) {
            logger.info("Channel WebBroker->CC is CLOSED unexpectedly. Opening new channel " + getIpAddress() + ":" + getIpPort() + "");
            openChannel();
        }
        sc.socket().close();
        sc.connect(new InetSocketAddress(getIpAddress(), getIpPort()));
        while(!sc.finishConnect()){
            Thread.sleep(1);    
        }
        logger.info("Connection established " + getIpAddress() + ":" + getIpPort());
        sc.socket().setKeepAlive(true);
        return sc.isConnected();
    } catch (Exception e) {
        logger.info("failed to connect to " + getIpAddress() + ":" + getIpPort(), e);
        return false;
    }
}
private void openChannel() throws Exception {
    sc = SocketChannel.open();
    sc.socket().setKeepAlive(true);
    sc.socket().setSoTimeout(30000);
}
[エラー] 10.201.1.53:8084 に接続できませんでした
 java.nio.channels.ClosedChannelException: null
    at sun.nio.ch.SocketChannelImpl.ensureOpenAndUnconnected(SocketChannelImpl.java:472) ~[na:1.6.0_07]
    at sun.nio.ch.SocketChannelImpl.connect(SocketChannelImpl.java:486) ~[na:1.6.0_07]
編集:最後に、これは以下の行が原因であることがわかりました。
 sc.socket().close();