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Netty client not receiving the complete data sent by the Server

I am designing a Netty based solution to transfer a file from Server to the Client over TCP. The client specifies the location of the file and then the server sends the file to the client.
Currently, the solution works fine for files with small size (< 2MB of data).
If the file to be sent is larger than ~5MB only partial data is sent and this varies (every time not the same amount of data is sent). Also, it is seen from the log that the Server has sent the complete amount of data (file).
The issue is the client is not receiving complete data sent by the server. What is wrong in my below code? or Can someone point me to right direction.
Below is my client, server and their handlers:
(For brevity I have listed only the methods that is of importance)
Client:
public class FileClient {
private final static int PORT = 8992;
private final static String HOST = "127.0.0.1";
public class ClientChannelInitializer extends ChannelInitializer<SocketChannel> {
private SslContext sslContext = null;
private String srcFile = "";
private String destFile = "";
public ClientChannelInitializer(String srcFile, String destFile, SslContext sslCtx) {
this.sslContext = sslCtx;
this.srcFile = srcFile;
this.destFile = destFile;
}
#Override
protected void initChannel(SocketChannel socketChannel) throws Exception {
ChannelPipeline pipeline = socketChannel.pipeline();
pipeline.addLast(sslContext.newHandler(socketChannel.alloc(), HOST, PORT));
pipeline.addLast("clientHandler", new FileClientHandler(srcFile, destFile));
}
}
private void startUp(String srcFile, String destFile) throws Exception {
SslContext sslCtx = SslContextBuilder.forClient().trustManager(InsecureTrustManagerFactory.INSTANCE).build();
EventLoopGroup workerGroup = new NioEventLoopGroup();
Bootstrap clientBootstrap = new Bootstrap();
clientBootstrap.group(workerGroup);
clientBootstrap.channel(NioSocketChannel.class);
clientBootstrap.option(ChannelOption.TCP_NODELAY, true);
clientBootstrap.handler(new LoggingHandler(LogLevel.INFO));
clientBootstrap.handler(new ClientChannelInitializer(srcFile, destFile, sslCtx));
Channel channel = clientBootstrap.connect(new InetSocketAddress(HOST, PORT)).sync().channel();
channel.closeFuture().sync();
}
}
public static void main(String[] args) throws Exception {
String src = "/Users/home/src/test.mp4";
String dest = "/Users/home/dest/test.mp4";
new FileClient().startUp(src, dest);
}
}
ClientHandler:
public class FileClientHandler extends SimpleChannelInboundHandler<ByteBuf> {
private final String sourceFileName;
private OutputStream outputStream;
private Path destFilePath;
private byte[] buffer = new byte[0];
public FileClientHandler(String SrcFileName, String destFileName) {
this.sourceFileName = SrcFileName;
this.destFilePath = Paths.get(destFileName);
System.out.println("DestFilePath-" + destFilePath);
}
#Override
public void channelActive(ChannelHandlerContext ctx) throws Exception {
ctx.writeAndFlush(ToByteBuff(this.sourceFileName));
}
#Override
protected void channelRead0(ChannelHandlerContext ctx, ByteBuf byteBuff) throws Exception {
if (this.outputStream == null) {
Files.createDirectories(this.destFilePath.getParent());
if (Files.exists(this.destFilePath)) {
Files.delete(this.destFilePath);
}
this.outputStream = Files.newOutputStream(this.destFilePath, StandardOpenOption.CREATE,
StandardOpenOption.APPEND);
}
int size = byteBuff.readableBytes();
if (size > this.buffer.length) {
this.buffer = new byte[size];
}
byteBuff.readBytes(this.buffer, 0, size);
this.outputStream.write(this.buffer, 0, size);
}
FileServer:
public class FileServer {
private final int PORT = 8992;
public void run() throws Exception {
SelfSignedCertificate ssc = new SelfSignedCertificate();
final SslContext sslCtx = SslContextBuilder.forServer(ssc.certificate(), ssc.privateKey()).build();
EventLoopGroup bossGroup = new NioEventLoopGroup();
EventLoopGroup workerGroup = new NioEventLoopGroup();
try {
ServerBootstrap b = new ServerBootstrap();
b.group(bossGroup, workerGroup).channel(NioServerSocketChannel.class).option(ChannelOption.SO_BACKLOG, 100)
.handler(new LoggingHandler(LogLevel.INFO)).childHandler(new ChannelInitializer<SocketChannel>() {
#Override
public void initChannel(SocketChannel ch) throws Exception {
ChannelPipeline pipeline = ch.pipeline();
pipeline.addLast(sslCtx.newHandler(ch.alloc()));
pipeline.addLast(new ChunkedWriteHandler());
pipeline.addLast(new FilServerFileHandler());
}
});
ChannelFuture f = b.bind(PORT).sync();
f.channel().closeFuture().sync();
} finally {
bossGroup.shutdownGracefully();
workerGroup.shutdownGracefully();
}
}
public static void main(String[] args) throws Exception {
new FileServer().run();
}
}
FileServerHandler:
public class FilServerFileHandler extends SimpleChannelInboundHandler<ByteBuf> {
#Override
protected void channelRead0(ChannelHandlerContext ctx, ByteBuf buff) throws Exception {
String filePathStr = byteBuf.toString(CharsetUtil.UTF_8);
File file = new File(filePathStr);
RandomAccessFile raf = null;
ChannelFuture sendFileFuture;
try {
raf = new RandomAccessFile(file, "r");
sendFileFuture = ctx.writeAndFlush(new ChunkedNioFile(raf.getChannel()),
ctx.newProgressivePromise());
sendFileFuture.addListener(new ChannelProgressiveFutureListener() {
public void operationComplete(ChannelProgressiveFuture future) throws Exception {
System.err.println("Transfer complete.");
}
public void operationProgressed(ChannelProgressiveFuture future, long progress, long total)
throws Exception {
if (total < 0) { // total unknown
System.err.println("Transfer progress: " + progress);
} else {
System.err.println("Transfer progress: " + progress + " / " + total);
}
}
});
} catch (FileNotFoundException fnfe) {
} finally {
if (raf != null)
raf.close();
}
}
I have checked SO Q1 and SO Q2

Fixed your problem by a little tweak in FilServerFileHandler:
public class FileServerHandler extends SimpleChannelInboundHandler<ByteBuf> {
#Override
protected void channelRead0(ChannelHandlerContext ctx, ByteBuf buff) throws Exception {
String filePathStr = buff.toString(CharsetUtil.UTF_8);
File file = new File(filePathStr);
RandomAccessFile raf = new RandomAccessFile(file, "r");
ChannelFuture sendFileFuture;
try {
sendFileFuture = ctx.writeAndFlush(new ChunkedNioFile(raf.getChannel()), ctx.newProgressivePromise());
sendFileFuture.addListener(new ChannelProgressiveFutureListener() {
public void operationComplete(ChannelProgressiveFuture future) throws Exception {
System.err.println("Transfer complete.");
if (raf != null) {
raf.close();
}
}
public void operationProgressed(ChannelProgressiveFuture future, long progress, long total)
throws Exception {
if (total < 0) { // total unknown
System.err.println("Transfer progress: " + progress);
} else {
System.err.println("Transfer progress: " + progress + " / " + total);
}
}
});
} catch (FileNotFoundException e) {
e.printStackTrace();
}
}
}
I moved raf.close() into operationComplete method.
The partial transportation is caused by the closing of raf during write operation. Note that ctx.writeAndFlush is an async call, so the raf.close() in finally block might be triggered before the write operation complete, especially when the size of the file is large enough.

Publisher MQTT client stops to work in Subscriber's Callback. (PAHO JAVA)

I'm trying to implement a fake broker (actually it is an mqtt publisher client in an mqtt subscriber's callback). There are 3 separated publisher clients which are publishing random numbers between 0 and 1. This fake broker just summarizes this random numbers, and publishes away to an other topic. (Maybe not in the right way, but for now it is ok) This solution is working but after a few incoming messages this broker stops to work. I Tried to debug it, but I found only ClassNotFound Exceptions... Here is my FakeBroker and it's Callback implementation.
public class FakeBroker implements Runnable{
public static final String BROKER_URL = "";
public static final String TOPIC_FAKE_A = "";
public static final String TOPIC_FAKE_B = "";
public static final String TOPIC_FAKE_C = "";
public static final String USER_NAME = "";
public static final char[] USER_PSW = "".toCharArray();
private MqttClient client;
private MqttConnectOptions options;
private SubscriberCallback callback;
public FakeBroker() {
options = new MqttConnectOptions();
options.setUserName(USER_NAME);
options.setPassword(USER_PSW);
options.setCleanSession(false);
callback = new SubscriberCallback();
try {
client = new MqttClient(BROKER_URL, MqttClient.generateClientId()+"-sub");
client.setCallback(callback);
} catch (MqttException e) {
e.printStackTrace();
System.exit(1);
}
}
public void start() {
try {
client.connect(options);
System.out.println("Fake Broker are connected to the cloud.");
client.subscribe(TOPIC_FAKE_A);
client.subscribe(TOPIC_FAKE_B);
client.subscribe(TOPIC_FAKE_C);
} catch (MqttException e) {
e.printStackTrace();
}
}
#Override
public void run() {
start();
}
}
And here is it's Callback
public class SubscriberCallback implements MqttCallback {
public static final String BROKER_URL = "";
public static final String TOPIC_FAKE_BROKER = "";
public static final String USER_NAME = "";
public static final char[] USER_PSW = "".toCharArray();
private MqttClient client;
private MqttConnectOptions options;
private int counter = 1;
private int result = 0;
public SubscriberCallback() {
try {
client = new MqttClient(BROKER_URL, "4-pub");
options = new MqttConnectOptions();
options.setPassword(USER_PSW);
options.setUserName(USER_NAME);
} catch (MqttException e) {
e.printStackTrace();
}
}
#Override
public void connectionLost(Throwable throwable) {
}
#Override
public void messageArrived(String topic, MqttMessage mqttMessage) throws Exception {
System.out.println("Message Arrived. Topic " + topic + " message: " +mqttMessage + " ---- Message Counter: " + counter);
int number = Integer.parseInt(mqttMessage.toString());
result += number;
if (counter%3 == 0) {
publishAway(new MqttMessage(Integer.toString(result).getBytes()));
result = 0;
}
incrementCounter();
}
private void publishAway(MqttMessage mqttMessage) throws MqttException {
client.connect(options);
final MqttTopic topicFakeBroker = client.getTopic(TOPIC_FAKE_BROKER);
topicFakeBroker.publish(mqttMessage);
client.disconnect();
System.out.println("Fake broker got the message " + mqttMessage + " and published away to" + topicFakeBroker.getName());
}
#Override
public void deliveryComplete(IMqttDeliveryToken iMqttDeliveryToken) {
}
private void incrementCounter() {
counter++;
}
}
Of course I use valid BROKER_URL and TOPICS but these informations are confidential. Thanks for Your answers! :)

Why file transfer is very very slow on netty (4.1.5-Final)

In my socket based server implementation using Netty 4.1.5-Final, when I transfer the video/image file into chunks (20K Chunk Size) I found that around 350+ ms is the difference between two chunks, not sure how to reduce that.
Here is my main server code :
public class MultimediaServer extends Thread implements IMultimediaServer, BeanFactoryAware {
/**
* Logger Instance
*/
protected Logger logger = Logger.getLogger(this.getClass());
#Autowired
private Properties props;
private RequestHandler requestHandler;
private BeanFactory beanFactory;
private int port;
private int maxConnection;
private int timeout = 30000;
private EventLoopGroup bossGroup = null;
private EventLoopGroup workerGroup = null;
#Override
public void run() {
try {
bossGroup = new NioEventLoopGroup();
workerGroup = new NioEventLoopGroup();
try {
ServerBootstrap serverBootstrap = new ServerBootstrap();
serverBootstrap.group(bossGroup, workerGroup).channel(NioServerSocketChannel.class)
.childHandler(new ChannelInitializer<SocketChannel>() {
#Override
public void initChannel(SocketChannel ch) throws Exception {
ch.pipeline().addLast("frameDecoder", new LengthFieldBasedFrameDecoder(Integer.MAX_VALUE, 0, Const.PACKET_HEADER_LENGTH, 0, Const.PACKET_HEADER_LENGTH));
ch.pipeline().addLast("messageDecoder", new MessageDecoder());
ch.pipeline().addLast("frameEncoder", new ResponseHandler(Const.PACKET_HEADER_LENGTH));
ch.pipeline().addLast("bytesEncoder", new ByteArrayEncoder());
ch.pipeline().addLast(getHandler());
}
}).option(ChannelOption.SO_BACKLOG, maxConnection)
.option(ChannelOption.SO_KEEPALIVE, true)
.option(ChannelOption.TCP_NODELAY, true)
.option(ChannelOption.SO_REUSEADDR, true)
.option(ChannelOption.MAX_MESSAGES_PER_READ, Integer.MAX_VALUE)
.option(ChannelOption.CONNECT_TIMEOUT_MILLIS, timeout)
.option(ChannelOption.WRITE_BUFFER_LOW_WATER_MARK, 32 * 1024)
.option(ChannelOption.WRITE_BUFFER_HIGH_WATER_MARK, 128 * 1024)
.option(ChannelOption.ALLOCATOR, PooledByteBufAllocator.DEFAULT)
.childOption(ChannelOption.SO_KEEPALIVE, true)
.childOption(ChannelOption.TCP_NODELAY, true)
.childOption(ChannelOption.SO_REUSEADDR, true)
.childOption(ChannelOption.CONNECT_TIMEOUT_MILLIS, timeout)
.childOption(ChannelOption.MAX_MESSAGES_PER_READ, Integer.MAX_VALUE)
.childOption(ChannelOption.ALLOCATOR, PooledByteBufAllocator.DEFAULT)
.childOption(ChannelOption.WRITE_BUFFER_LOW_WATER_MARK, 32 * 1024)
.childOption(ChannelOption.WRITE_BUFFER_HIGH_WATER_MARK, 128 * 1024);
// Bind and start to accept incoming connections.
ChannelFuture f = serverBootstrap.bind(this.port).sync();
// Wait until the server socket is closed.
// In this example, this does not happen, but you can do that to
// gracefully shut down your server.
f.channel().closeFuture().sync();
} finally {
workerGroup.shutdownGracefully();
bossGroup.shutdownGracefully();
}
} catch (Throwable e) {
logger.error("ERROR : While starting the Konvx service ", e);
}
}
#Override
public void startServer(int port) {
super.setName("KonvxMultimediaServer : " + port);
this.port = port;
this.start();
}
#Override
public void stopServer() {
workerGroup.shutdownGracefully();
bossGroup.shutdownGracefully();
}
public RequestHandler getRequestHandler() {
return requestHandler;
}
public void setRequestHandler(RequestHandler requestHandler) {
this.requestHandler = requestHandler;
}
/**
* Return Request Handler
* #return RequestHandler
*/
private RequestHandler getHandler() {
return (RequestHandler) beanFactory.getBean("requestHandler", RequestHandler.class);
}
#Override
public void setBeanFactory(BeanFactory beanFactory) throws BeansException {
this.beanFactory = beanFactory;
}
#Value("${konvx.maxConnection}")
public void setMaxConnection(String maxConnection) {
this.maxConnection = Integer.parseInt(maxConnection);
}
#Value("${konvx.socket.timeout}")
public void setTimeout(String timeout) {
this.timeout = Integer.parseInt(timeout);
}
}
Here is the channel handler
public class RequestHandler extends SimpleChannelInboundHandler<KonvxMessage> {
/**
* Logger Instance
*/
private Logger logger = Logger.getLogger(this.getClass());
#Autowired
private Router router;
#Autowired
protected UserPool userPool;
#Override
public void channelRead0(ChannelHandlerContext ctx, KonvxMessage message) throws Exception {
Packet packet = new Packet();
packet.setCtx(ctx);
try {
if (message == null) {
logger.warn("Warning - message is empty");
return;
}
// Throw the exception if in-bound message does not magic cookie
if (!message.hasCookie()) {
logger.error("ERROR: Bad Cookie :" + message);
return;
}
// Checking if user is a valid/registered to our application
if (!userPool.isValidUser(message.getUserId())) {
packet.writeMessage(KonvxMessageFactory.getInvalidUserMessage(message));
return;
}
packet.setInMessage(message);
router.route(packet);
} catch (Exception e) {
logger.error("ERROR : Whie receiving/processing the in-bound message ", e);
packet.writeMessage(KonvxMessageFactory.getErrorMessage(message, KonvxError.UNKNOWN_ERROR));
}
}
#Override
public void channelReadComplete(ChannelHandlerContext ctx) throws Exception {
ctx.flush();
}
#Override
public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
logger.warn("WARN : Connection problem - " + cause.getMessage() + " Client address :" + ctx.channel().remoteAddress());
ctx.close();
return;
}
}
Here is the decoder for the packet -
public class MessageDecoder extends ByteToMessageDecoder {
/**
* Logger Instance
*/
protected Logger logger = Logger.getLogger(this.getClass());
#Override
protected void decode(ChannelHandlerContext ctx, ByteBuf in, List<Object> out) throws Exception {
// Parsing the object
String msg = null;
try {
byte[] bytes = new byte[in.readableBytes()];
if (bytes.length <= 0) {
logger.debug("Total readable bytes :" + in.readableBytes() + " exiting...");
return;
}
in.readBytes(bytes);
msg = new String(bytes, CharsetUtil.UTF_8);
// Return if message is empty
if (msg.isEmpty()) {
logger.warn("Message is empty...exiting...");
return;
}
KonvxMessage konvxMessage = JsonUtil.parseMessage(msg);
// Logging the incoming message
StringBuilder logMessage = new StringBuilder();
logMessage.append("Incoming message :").append(System.lineSeparator())
.append(konvxMessage)
.append(System.lineSeparator());
logger.info(logMessage.toString());
out.add(konvxMessage);
} catch (Throwable e) {
logger.error("ERROR : While receiving/parsing/decoding the message " + msg, e);
new Packet(ctx).writeMessage(KonvxMessageFactory.getParseFailedErrorMessage(msg));
}
}
}
Please help, how to fine tune the netty to improve the file transfer performance over socket between mobile device and my java server.

UDP Broadcasting not working

My Requirement is to broadcast a UDP message to all connected client from the server.
I am using netty 4.x.x for client server implementation. I am not I am not able to broadcast the message to all connected client.
Server code
public class UDPServer {
private static final Logger logger = LogManager.getLogger(UDPServer.class.getName());
private final ServerConfig conf;
/*
* Constructor of Server class
*/
public UDPServer(ServerConfig conf) {
this.conf = conf;
public void run() throws Exception {
EventLoopGroup bossGroup = new NioEventLoopGroup();
EventLoopGroup workerGroup = new NioEventLoopGroup();
try {
EventLoopGroup udpGroup = new NioEventLoopGroup();
try {
Bootstrap b = new Bootstrap();
b.group(udpGroup)
.channel(NioDatagramChannel.class)
.handler(new ChannelInitializer<DatagramChannel>() {
#Override
protected void initChannel(DatagramChannel ch) throws Exception {
ChannelPipeline p = ch.pipeline();
p.addLast("udpDecoder", new MessageToMessageDecoder<DatagramPacket>() {
#Override
protected void decode(ChannelHandlerContext ctx, DatagramPacket msg, List<Object> out) throws Exception {
out.add(msg.content());
msg.retain();
}
});
p.addLast("handler", new UDServerPHandler());
p.addLast("frameDecoder", new LengthFieldBasedFrameDecoder(65535, 2, 2));
}
})
.option(ChannelOption.SO_BROADCAST, true);
// b.bind(9998).sync().channel().closeFuture().sync();
b.bind(9998).channel().closeFuture().sync();
} finally {
udpGroup.shutdownGracefully();
}
}
/**
* Main method to run the class
*
* #param args
* #throws Exception
*/
public static void main(String[] args) throws Exception {
new UDPServer(new ServerConfig()).run();
}
}
Server Handler
package com.quantotrade.shamse.udp;
import io.netty.buffer.Unpooled;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.SimpleChannelInboundHandler;
import io.netty.channel.socket.DatagramPacket;
import io.netty.util.CharsetUtil;
import java.util.Random;
public class UDServerPHandler extends SimpleChannelInboundHandler<DatagramPacket> {
private static final Random random = new Random();
private static final String[] quotes = {
"ONE",
"TWO",
"THREE",
"FOUR",
};
private static String nextQuote() {
int quoteId;
synchronized (random) {
quoteId = random.nextInt(quotes.length);
}
return quotes[quoteId];
}
#Override
protected void channelRead0(ChannelHandlerContext ctx, DatagramPacket packet) throws Exception {
//System.err.println(packet.content().toString(CharsetUtil.UTF_8));
//if ("Quote".equals(packet.content().toString(CharsetUtil.UTF_8))) {
// ctx.write(new DatagramPacket(Unpooled.copiedBuffer("Quote" + nextQuote(), CharsetUtil.UTF_8), packet.sender()));
ctx.channel().writeAndFlush(new DatagramPacket(Unpooled.copiedBuffer("Quote" + nextQuote(), CharsetUtil.UTF_8), packet.sender()));
//}
}
#Override
public void channelReadComplete(ChannelHandlerContext ctx) {
ctx.flush();
}
}
Client Code
public class UDPClientHandler extends SimpleChannelInboundHandler<DatagramPacket> {
//private final EventExecutor executor = new NioEventLoopGroup();
//private final ChannelGroup channels = new DefaultChannelGroup();
#Override
protected void channelRead0(ChannelHandlerContext ctx, DatagramPacket msg) throws Exception {
String response = msg.content().toString(CharsetUtil.UTF_8);
if (response.startsWith("Quote")) {
System.out.println("Quote:" + response.substring(5));
//ctx.writeAndFlush(new DatagramPacket(Unpooled.copiedBuffer("Quote", CharsetUtil.UTF_8), msg.sender()));
// channels.add(ctx.channel());
}
}
Please Help

netty4:How to listen on multiple ports on a java process

I'm trying to listen for connections on two different ports
I start 2 Thread in a java main method,every Thread bind a port with netty4,but can't
listener success!
this is my code,the port 3333 is ok,but 1234 is not ok,it looks like 3333 is blocking!
public class ObjectServer
{
private static final Logger logger = LoggerFactory.getLogger(ObjectServer.class);
private String ip;
private int port;
public ObjectServer(int port)
{
this.port = port;
}
public void run(final ChannelInboundHandlerAdapter handler) throws Exception
{
EventLoopGroup bossGroup = new NioEventLoopGroup();
EventLoopGroup workerGroup = new NioEventLoopGroup();
try
{
ServerBootstrap server = new ServerBootstrap();
server.group(bossGroup, workerGroup).channel(NioServerSocketChannel.class).childHandler(new ChannelInitializer<SocketChannel>()
{
#Override
public void initChannel(SocketChannel ch) throws Exception
{
ch.pipeline().addLast(new ObjectEncoder(), new ObjectDecoder(ClassResolvers.cacheDisabled(null)), handler);
}
});
server.bind(port).sync().channel().closeFuture().sync();
}
catch (Exception e)
{
logger.error("开启监听失败！端口[" + port + "]", e);
throw e;
}
finally
{
bossGroup.shutdownGracefully();
workerGroup.shutdownGracefully();
}
}
}
public class SocketServer
{
private static final Logger logger = LoggerFactory.getLogger(SocketServer.class);
private static final StringDecoder DECODER = new StringDecoder();
private static final StringEncoder ENCODER = new StringEncoder();
private int port;
public SocketServer(int port)
{
this.port = port;
}
public void run(final ChannelInboundHandlerAdapter handler) throws Exception
{
EventLoopGroup bossGroup = new NioEventLoopGroup();
EventLoopGroup workerGroup = new NioEventLoopGroup();
try
{
ServerBootstrap b = new ServerBootstrap();
b.group(bossGroup, workerGroup).channel(NioServerSocketChannel.class).childHandler(new ChannelInitializer<SocketChannel>()
{
#Override
public void initChannel(SocketChannel ch) throws Exception
{
ChannelPipeline pipeline = ch.pipeline();
// Add the text line codec combination first,
pipeline.addLast("framer", new DelimiterBasedFrameDecoder(8192, Delimiters.lineDelimiter()));
// the encoder and decoder are static as these are
// sharable
pipeline.addLast("encoder", ENCODER);
pipeline.addLast("decoder", DECODER);
// and then business logic.
pipeline.addLast("handler", handler);
}
});
b.bind(port).sync().channel().closeFuture().sync();
}
catch (Exception e)
{
logger.error("开启监听失败！端口[" + port + "]", e);
throw e;
}
finally
{
bossGroup.shutdownGracefully();
workerGroup.shutdownGracefully();
}
}
}
public class Test
{
public static void main(String[] args) throws Exception
{
Thread1 thread1 = new Thread1();
Thread2 thread2 = new Thread2();
thread2.start();
thread1.start();
new SocketClient("192.168.16.52", 3333).run(new TestHandler4("test4"));
new ObjectClient("192.168.16.52", 1234).run(new TestHandler3("test3"));
}
#Sharable
static class TestHandler1 extends ChannelInboundHandlerAdapter
{
#Override
public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception
{
System.out.println("1234" + msg);
}
}
static class Thread1 extends Thread
{
#Override
public void run()
{
try
{
new ObjectServer(1234).run(new TestHandler1());
}
catch (Exception e)
{
e.printStackTrace();
}
}
}
static class Thread2 extends Thread
{
#Override
public void run()
{
try
{
new SocketServer(3333).run(new TestHandler2());
}
catch (Exception e)
{
e.printStackTrace();
}
}
}
#Sharable
static class TestHandler2 extends SimpleChannelInboundHandler<String>
{
#Override
public void channelRead0(ChannelHandlerContext ctx, String msg) throws Exception
{
System.out.println("3333" + msg);
}
#Override
public void channelActive(ChannelHandlerContext ctx) throws Exception
{
System.out.println("sssssssssssssssss");
}
}
#Sharable
static class TestHandler3 extends ChannelInboundHandlerAdapter
{
private String msg;
public TestHandler3(String msg)
{
this.msg = msg;
}
#Override
public void channelActive(ChannelHandlerContext ctx) throws Exception
{
ctx.writeAndFlush(msg);
}
}
#Sharable
static class TestHandler4 extends SimpleChannelInboundHandler<String>
{
private String msg;
public TestHandler4(String msg)
{
this.msg = msg;
}
#Override
public void channelActive(ChannelHandlerContext ctx) throws Exception
{
ctx.writeAndFlush(msg);
}
#Override
protected void channelRead0(ChannelHandlerContext arg0, String arg1)throws Exception
{
}
}
}

In your run() implementation, you do this:
server.bind(port).sync().channel().closeFuture().sync();
.. which will block until the server socket is closed. Because you do not close the server socket, it will never return. Therefore, only the first server socket will be bound.
What you probably want is just bind and return rather than waiting for the server sockets closed.