远程方法调用端口正在使用中

问题描述

我已经用RMI创建了一个服务器，客户端程序。但是，每当我从命令提示符启动rmiregistry后运行我的服务器，都会抛出已经使用的端口错误。它是唯一开始精神病的人。我已经从netstat检查了。

服务器代码：

  public class Server实现Runnable，Linker {
 
 
 private static Server server = null; 
 private static Linker l = null; 
 private String name = null; 
 public Server（）{} 
 
 public void setName（String name）{
 this.name = name; 
} 
 public String getName（）{
 return name; 
} 
 public void run（）{
 while（！（Andy）。equalsIgnoreCase（name））{
 
} 
} 
 public static void createStub（）{
 try {
 server = new Server（）; 
 l =（Linker）UnicastRemoteObject.exportObject（server，1099）; 
 
注册表注册表= LocateRegistry.getRegistry（）; 
 registry.bind（Link，l）; 
 System.out.println（Ready）; 
} 
 catch（异常e）{
 e.printStackTrace（）; 
} 
} 
 public static void main（String [] args）{
 // TODO自动生成的方法stub 
 createStub（）; 
线程t =新线程（服务器）; 
 
} 
} 
  

客户端代码：

  public class客户端实现Runnable {
 
 
 private Scanner sc = new Scanner（System.in）; 
 private Linker linker = null; 
 
 public void loadStub（）{
 try {
注册表注册表= LocateRegistry.getRegistry（1099）; 
 linker =（Linker）registry.lookup（Link）; 
 
} catch（Exception e）{
 
} 
} 
 public void run（）{
 String ip = null; 
 while（sc.hasNext（）&！（ip = sc.nextLine（））。equalsIgnoreCase（：q））{
 try {
 linker.setName ）; 
} catch（RemoteException e）{
 // TODO自动生成的catch块
 e.printStackTrace（）; 
} 
} 
} 
 
 
 public static void main（String ... args）{
客户端client = new Client ; 
 client.loadStub（）; 
 Thread t = new Thread（client）; 
 t.start（）; 
} 
} 
  

异常：

  java.rmi.server.ExportException：端口已在使用：1099;嵌套异常是：
 java.net.BindException：已经在使用的地址：JVM_Bind 
  

解决方案

rmiregistry 正在使用1099端口，因此您无法使用它。或者：

1. 通过LocateRegistry.createRegistry（）（首选）在同一进程中启动注册表。



2. 在1099以外的其他端口上启动 rmiregistry 。

I have created a Server, Client kind of program with RMI. But whenever I run my Server after starting the rmiregistry from command prompt, the port already in use error is thrown. Its only me who started the rmiregistry. I have checked it from netstat.

Server Code:

public class Server implements Runnable, Linker{


private static Server server = null;
    private static Linker l = null;
    private String name = null;
    public Server(){}

    public void setName(String name){
        this.name = name;
    }
    public String getName(){
        return name;               
    }  
    public void run(){
        while(!("Andy").equalsIgnoreCase(name)){

        }
    }
    public static void createStub(){
        try{
            server = new Server();
            l = (Linker) UnicastRemoteObject.exportObject(server, 1099);

            Registry registry = LocateRegistry.getRegistry();
            registry.bind("Link", l);
            System.out.println("Ready");
        }
        catch(Exception e){
            e.printStackTrace();
        }
    }                       
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        createStub();
        Thread t = new Thread(server);

    }
}

Client Code:

public class Client implements Runnable{


private Scanner sc = new Scanner(System.in);
    private Linker linker = null;

    public void loadStub(){
        try{
            Registry registry = LocateRegistry.getRegistry(1099);
            linker = (Linker) registry.lookup("Link");

        }catch(Exception e){

        }
    }
    public void run(){
        String ip = null;
        while(sc.hasNext()&&!(ip = sc.nextLine()).equalsIgnoreCase(":q")){
            try {
                linker.setName(ip);
            } catch (RemoteException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
    }


    public static void main(String...args){
        Client client = new Client();
        client.loadStub();
        Thread t = new Thread(client);
        t.start();
    }
}

Exception:

java.rmi.server.ExportException: Port already in use: 1099; nested exception is: 
java.net.BindException: Address already in use: JVM_Bind

解决方案

The rmiregistry is using port 1099 in its process so you can't use it in yours. Either:

1. Start the registry in the same process, via LocateRegistry.createRegistry() (preferred).
2. Export your object on a different port.
3. Start the rmiregistry on a different port other than 1099.

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