Solved

java.net.BindException: Cannot assign requested address: Cannot bind

Posted on 2006-11-30
3
9,669 Views
Last Modified: 2012-06-27
Hi,

When I try to connect to a machine (229.2.0.2 on port 9202) I get the java.net.BindException.

When I try connecting to localhost, I do not get the exception.  Also, I do not get an exception when I try connecting to a machine on my local network.

I would like to know why I cannot bind to this address, and I would like to know a workaround or solution.

Thanks!

Output of TestServer:

Host Address=229.2.0.1
Port        =9201
Exception in thread "main" java.net.BindException: Cannot assign requested address: Cannot bind
      at java.net.PlainDatagramSocketImpl.bind0(Native Method)
      at java.net.PlainDatagramSocketImpl.bind(PlainDatagramSocketImpl.java:82)
      at java.net.DatagramSocket.bind(DatagramSocket.java:368)
      at java.net.MulticastSocket.<init>(MulticastSocket.java:147)
      at TestServer.main(TestServer.java:17)
      at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
      at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
      at java.lang.reflect.Method.invoke(Method.java:585)
      at com.intellij.rt.execution.application.AppMain.main(AppMain.java:90)

TestServer source code:

import java.net.*;

public class TestServer {

 public static void main(String[] args) throws Exception {

   if (args.length != 2) {
     System.out.println("Usage: java TestServer <host_address_ipv6> <port>");
     System.exit(1);
   }

   System.out.println("Host Address="+args[0]);
   System.out.println("Port        ="+args[1]);

   ServerSocket ss = new ServerSocket();
   InetSocketAddress isa = new InetSocketAddress(InetAddress.getByName(args[0]), Integer.parseInt(args[1]));
   new MulticastSocket(isa);

   System.out.println("ServerSocket Bound");

 //  ss.accept();
 }
}
0
Comment
Question by:Gezna
3 Comments
 
LVL 23

Expert Comment

by:Ajay-Singh
ID: 18047358
the host should either be localhost, or any other host address of local computer - should never be remote host address
0
 
LVL 12

Expert Comment

by:enachemc
ID: 18048221
make sure that there is no other process that uses that port.
0
 

Accepted Solution

by:
geoff2k earned 500 total points
ID: 18048679
You can only bind to ip addresses that are bound to an adapter on your local machine.   Under Windows you can use "ipconfig /all" to get a list of all the addresses that are local to you:

c:>ipconfig /all | find "IP Address"
        IP Address. . . . . . . . . . . . : 192.168.47.1
        IP Address. . . . . . . . . . . . : 192.168.159.1
        IP Address. . . . . . . . . . . . : 10.0.0.14
        IP Address. . . . . . . . . . . . : 10.31.0.240

I can successfully bind to any of the above addresses as well as 127.0.0.1 (localhost).  Any other procudes the error you mention.
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Java had always been an easily readable and understandable language.  Some relatively recent changes in the language seem to be changing this pretty fast, and anyone that had not seen any Java code for the last 5 years will possibly have issues unde…
Go is an acronym of golang, is a programming language developed Google in 2007. Go is a new language that is mostly in the C family, with significant input from Pascal/Modula/Oberon family. Hence Go arisen as low-level language with fast compilation…
This tutorial will introduce the viewer to VisualVM for the Java platform application. This video explains an example program and covers the Overview, Monitor, and Heap Dump tabs.
This tutorial explains how to use the VisualVM tool for the Java platform application. This video goes into detail on the Threads, Sampler, and Profiler tabs.

910 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

20 Experts available now in Live!

Get 1:1 Help Now