Error Socket ensureReadOpen

java.nio.channels.ClosedChannelException
        at sun.nio.ch.SocketChannelImpl.ensureReadOpen(SocketChannelImpl.java:236)
        at sun.nio.ch.SocketChannelImpl.read(SocketChannelImpl.java:279)
        at com.Communicator$Listener.bytesRead(Communicator.java:152)
        at com.Communicator$Listener.run(Communicator.java:121)

public Communicator(String defaultIP) {
		int aux = DEFAULT_PORT;
		this.defaultIP = defaultIP;
		boolean created = false;
		clientSocketList = new LinkedHashMap<String, SocketChannel>();

		while (!created) {
			try {
				serverChannel = ServerSocketChannel.open();
				channelAddress = new InetSocketAddress(this.defaultIP, aux);
			} catch (IOException e) {
				e.printStackTrace();
				System.exit(1);
			}
			try {
				serverChannel.socket().bind(channelAddress);
				created = true;
			} catch (IOException e) {
				aux++;
			}
		}
		this.active = true;
		this.start();
	}

	public Communicator() {
		
	}
	
	@Override
	public void connectServer(String hostDescription) {
		try {
			String vet[] = hostDescription.split(":");
			String hostname = vet[0];
			int port = Integer.parseInt(vet[1].trim());
			clientChannel = SocketChannel.open(new InetSocketAddress(hostname, port));
		} catch (IOException e) {
			e.printStackTrace();
			System.exit(1);
		}
		rodaListener();
	}

	public  void run() {
		try {
		while (this.active) {
			try {
				clientChannel = serverChannel.accept();
				clientSocketList.put(clientRemoteChannelDesc(), clientChannel);
				rodaListener();
			} catch (IOException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

	public class Listener extends Thread {
		private boolean listening;
		SocketChannel clientChannel;
		int nBytes;

		public Listener(SocketChannel clientChannel) {
			try {
			this.clientChannel = clientChannel;
			this.listening = true;
			} catch (Exception e) {
				e.printStackTrace();
			}
		}

		public void run() {
			try {
				while (listening) {
					ByteBuffer header = bytesRead(6);
					if (header == null) {
						clientChannel.close();
					} else {
						header.getShort(); // Msg_Type
						int size = header.getInt();
						header.rewind();

						ByteBuffer body = bytesRead(size - 6);
						ByteBuffer msg = ByteBuffer.allocate(size);
						msg.put(header).put(body).flip();

						try {
							incoming.put(msg);
						} catch (InterruptedException e) {
							// TODO Auto-generated catch block
							e.printStackTrace();
						}
					}
				}
			} catch (IOException e) {
				e.printStackTrace();
				System.exit(1);
			}
		}

		public ByteBuffer bytesRead(int bytes) throws IOException {
			try {
			ByteBuffer msg = ByteBuffer.allocate(bytes);
			int readBytes = 0;
			while (readBytes < bytes) {
				int readCount = clientChannel.read(msg);
				if (readCount == -1) {
					clientChannel.close();
				}
				readBytes += readCount;
			}
			msg.flip();
			return msg;
			} catch (Exception e) {
				e.printStackTrace();
			}
			return null;
		}
	}

	private void rodaListener() {
		try {
		Listener l = new Listener(clientChannel);
		l.start();
		} catch (Exception e) {
			e.printStackTrace();
		}
	}