Program: 59704
Project: 59704
Buggy source:
/** 
 * Constructs a messaging transport
 * @param hostAddress the server host address
 * @param port  the server listening port; when it is 0, randomly assign a port number
 * @param clientStage the client-side stage that handles transport events
 * @param serverStage the server-side stage that handles transport events
 * @param numberOfTries the number of tries of connection
 * @param retryTimeout the timeout of reconnection
 */
public NettyMessagingTransport(final String hostAddress,int port,final EStage<TransportEvent> clientStage,final EStage<TransportEvent> serverStage,final int numberOfTries,final int retryTimeout){
  if (port < 0) {
    throw new RemoteRuntimeException("String_Node_Str" + port);
  }
  this.numberOfTries=numberOfTries;
  this.retryTimeout=retryTimeout;
  this.clientEventListener=new NettyClientEventListener(this.addrToLinkRefMap,clientStage);
  this.serverEventListener=new NettyServerEventListener(this.addrToLinkRefMap,serverStage);
  this.serverBossGroup=new NioEventLoopGroup(SERVER_BOSS_NUM_THREADS,new DefaultThreadFactory(CLASS_NAME + "String_Node_Str"));
  this.serverWorkerGroup=new NioEventLoopGroup(SERVER_WORKER_NUM_THREADS,new DefaultThreadFactory(CLASS_NAME + "String_Node_Str"));
  this.clientWorkerGroup=new NioEventLoopGroup(CLIENT_WORKER_NUM_THREADS,new DefaultThreadFactory(CLASS_NAME + "String_Node_Str"));
  this.clientBootstrap=new Bootstrap();
  this.clientBootstrap.group(this.clientWorkerGroup).channel(NioSocketChannel.class).handler(new NettyChannelInitializer(new NettyDefaultChannelHandlerFactory("String_Node_Str",this.clientChannelGroup,this.clientEventListener))).option(ChannelOption.SO_REUSEADDR,true).option(ChannelOption.SO_KEEPALIVE,true);
  this.serverBootstrap=new ServerBootstrap();
  this.serverBootstrap.group(this.serverBossGroup,this.serverWorkerGroup).channel(NioServerSocketChannel.class).childHandler(new NettyChannelInitializer(new NettyDefaultChannelHandlerFactory("String_Node_Str",this.serverChannelGroup,this.serverEventListener))).option(ChannelOption.SO_BACKLOG,128).option(ChannelOption.SO_REUSEADDR,true).childOption(ChannelOption.SO_KEEPALIVE,true);
  LOG.log(Level.FINE,"String_Node_Str",port);
  Channel acceptor=null;
  try {
    if (port > 0) {
      acceptor=this.serverBootstrap.bind(new InetSocketAddress(hostAddress,port)).sync().channel();
    }
 else {
      final Random rand=new Random();
      while (acceptor == null) {
        port=rand.nextInt(10000) + 10000;
        LOG.log(Level.FINEST,"String_Node_Str",port);
        acceptor=this.serverBootstrap.bind(new InetSocketAddress(hostAddress,port)).sync().channel();
      }
    }
  }
 catch (  Exception ex) {
    final RuntimeException transportException=new TransportRuntimeException("String_Node_Str" + this.serverPort);
    LOG.log(Level.SEVERE,"String_Node_Str" + this.serverPort,transportException);
    this.clientWorkerGroup.shutdownGracefully();
    this.serverBossGroup.shutdownGracefully();
    this.serverWorkerGroup.shutdownGracefully();
    throw transportException;
  }
  this.acceptor=acceptor;
  this.serverPort=port;
  this.localAddress=new InetSocketAddress(hostAddress,this.serverPort);
  LOG.log(Level.FINE,"String_Node_Str",this.localAddress);
}

Fixed version (ground truth):
/** 
 * Constructs a messaging transport
 * @param hostAddress the server host address
 * @param port  the server listening port; when it is 0, randomly assign a port number
 * @param clientStage the client-side stage that handles transport events
 * @param serverStage the server-side stage that handles transport events
 * @param numberOfTries the number of tries of connection
 * @param retryTimeout the timeout of reconnection
 */
public NettyMessagingTransport(final String hostAddress,int port,final EStage<TransportEvent> clientStage,final EStage<TransportEvent> serverStage,final int numberOfTries,final int retryTimeout){
  if (port < 0) {
    throw new RemoteRuntimeException("String_Node_Str" + port);
  }
  this.numberOfTries=numberOfTries;
  this.retryTimeout=retryTimeout;
  this.clientEventListener=new NettyClientEventListener(this.addrToLinkRefMap,clientStage);
  this.serverEventListener=new NettyServerEventListener(this.addrToLinkRefMap,serverStage);
  this.serverBossGroup=new NioEventLoopGroup(SERVER_BOSS_NUM_THREADS,new DefaultThreadFactory(CLASS_NAME + "String_Node_Str"));
  this.serverWorkerGroup=new NioEventLoopGroup(SERVER_WORKER_NUM_THREADS,new DefaultThreadFactory(CLASS_NAME + "String_Node_Str"));
  this.clientWorkerGroup=new NioEventLoopGroup(CLIENT_WORKER_NUM_THREADS,new DefaultThreadFactory(CLASS_NAME + "String_Node_Str"));
  this.clientBootstrap=new Bootstrap();
  this.clientBootstrap.group(this.clientWorkerGroup).channel(NioSocketChannel.class).handler(new NettyChannelInitializer(new NettyDefaultChannelHandlerFactory("String_Node_Str",this.clientChannelGroup,this.clientEventListener))).option(ChannelOption.SO_REUSEADDR,true).option(ChannelOption.SO_KEEPALIVE,true);
  this.serverBootstrap=new ServerBootstrap();
  this.serverBootstrap.group(this.serverBossGroup,this.serverWorkerGroup).channel(NioServerSocketChannel.class).childHandler(new NettyChannelInitializer(new NettyDefaultChannelHandlerFactory("String_Node_Str",this.serverChannelGroup,this.serverEventListener))).option(ChannelOption.SO_BACKLOG,128).option(ChannelOption.SO_REUSEADDR,true).childOption(ChannelOption.SO_KEEPALIVE,true);
  LOG.log(Level.FINE,"String_Node_Str",port);
  Channel acceptor=null;
  try {
    if (port > 0) {
      acceptor=this.serverBootstrap.bind(new InetSocketAddress(hostAddress,port)).sync().channel();
    }
 else {
      while (acceptor == null) {
        port=randPort.nextInt(10000) + 10000;
        LOG.log(Level.FINEST,"String_Node_Str",port);
        try {
          acceptor=this.serverBootstrap.bind(new InetSocketAddress(hostAddress,port)).sync().channel();
        }
 catch (        final Exception ex) {
          LOG.log(Level.FINEST,"String_Node_Str",port);
        }
      }
    }
  }
 catch (  final Exception ex) {
    final RuntimeException transportException=new TransportRuntimeException("String_Node_Str" + port);
    LOG.log(Level.SEVERE,"String_Node_Str" + port,transportException);
    this.clientWorkerGroup.shutdownGracefully();
    this.serverBossGroup.shutdownGracefully();
    this.serverWorkerGroup.shutdownGracefully();
    throw transportException;
  }
  this.acceptor=acceptor;
  this.serverPort=port;
  this.localAddress=new InetSocketAddress(hostAddress,this.serverPort);
  LOG.log(Level.FINE,"String_Node_Str",this.localAddress);
}