如何避免java.net.BindException:地址已在使用中
以下设备运行了1小时,然后关闭:如何避免java.net.BindException:地址已在使用中,java,linux,networking,tcp,Java,Linux,Networking,Tcp,以下设备运行了1小时,然后关闭: public class Mp extends JWindow implements MouseListener, MouseMotionListener { public static Mp j; private int serverPort = 0; private ServerSocket serverSock = null; private Socket sock = null; public static void main
public class Mp extends JWindow implements MouseListener, MouseMotionListener {
public static Mp j;
private int serverPort = 0;
private ServerSocket serverSock = null;
private Socket sock = null;
public static void main(final String[] args) throws IOException, InterruptedException, Exception {
j = new Mp();
j.setVisible(true);
j.waitForConnections();
}
public void waitForConnections() {
while (true) {
try {
sock = serverSock.accept();
System.out.println("[TCPMediaHandler]: Accepted new socket");
TCPMediaHandler handler = new TCPMediaHandler(sock);
handler.start();
} catch (IOException e) {
e.printStackTrace(System.err);
}
}
}
public Mp() throws IOException {
this.serverPort = 38891;
serverSock = new ServerSocket(serverPort);
serverSock.setReuseAddress(true);
//serverSock.setSoTimeout(500);
//serverSock.setSoLinger(true, 0);
System.out.println("[TCPMediaHandler]: Server started");
this.v1.setBackground(Color.BLACK);
this.v1.addMouseListener(this);
/* Close the window */
this.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent we) {
System.exit(0);
}
});
}
当我重新运行相同的东西时,它会失败,出现java.net.BindException
:
$ java -cp /var/tmp/dist/Mp.jar test.Mp
Exception in thread "main" java.net.BindException: Address already in use
at java.net.PlainSocketImpl.socketBind(Native Method)
at java.net.AbstractPlainSocketImpl.bind(AbstractPlainSocketImpl.java:353)
at java.net.ServerSocket.bind(ServerSocket.java:336)
at java.net.ServerSocket.<init>(ServerSocket.java:202)
at java.net.ServerSocket.<init>(ServerSocket.java:114)
at test.Mp.<init>(Mp.java)
at test.Mp.main(Mp.java)
您将看到您的setReuseAddress(true)被调用得太晚,即在绑定抛出异常之后 您可以通过三个步骤创建一个未绑定的ServerSocket,使其可重用,然后绑定它
ServerSocket ss = new ServerSocket();
ss.setReuseAddress(true);
ss.bind(new InetSocketAddress(12345));
我的一个程序中也有类似的问题,但最终我只是从IDE中运行了一个程序实例,我没有注意到。始终仔细检查后台没有运行任何东西 谢谢大家!!我已经按照你的建议试过了。但我仍然无法修复它。请参见上面我的编辑跟进部分。现在仍然有一些显示,但实际上我没有,甚至我的申请也被终止了。但是我仍然可以执行
telnet localhost thatport
@YumYumYum如果端口处于关闭等待状态,则表明在获取该netstat时应用程序仍在运行。在我的场景中,我并不真正关心端口号,因此可以使用ServerSocket myServer=new ServerSocket(0);final int-port=myServer.getLocalPort()@tobi42在这种情况下,您将不会重用端口,因此不会出现问题。
ServerSocket ss = new ServerSocket();
ss.setReuseAddress(true);
ss.bind(new InetSocketAddress(12345));