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04/08/2005 at 04:14AM PDT, ID: 21381392
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6.6

2 socket connections to the same host...

Asked by InteractiveMind in Java Programming Language

Tags: jvm_bind, address, already, socket

Hey guys.

I am trying to establish two Socket connections between to applications, over a network (well, I'm currently testing just on my local machine).

On the Server-application, I'm doing this:

Socket sock1;                 // Class instance
Socket sock2;                 //
...
ServerSocket srv = new ServerSocket( port );
sock1 = srv.accept();

try
{
    ServerSocket srv2 = new ServerSocket( port );
    srv2.setSoTimeout( 10 *1000 );
    sock2 = srv2.accept();
} catch ( InterruptedIOException ioe2 )
{
    error( "Timeout exception occured." );
} catch ( Exception e2 )
{
    e2.printStackTrace();
}


Then on the client-application:

Socket sock1;                // Class Instance
Socket sock2;                //
...
sock1 = new Socket( InetAddress.getByName( server ), port );
sock2 = new Socket( InetAddress.getByName( server ), port );


Obviously, it's all in try{}catch statements appropriately.. Now, when I run it, what appear to be happening, is that the first connection is made without problem, but then a problem occurs on the second connection attempt.. The server is throwing the following exception:

java.net.BindException: Address already in use: JVM_Bind
      at java.net.PlainSocketImpl.socketBind(Native Method)
      at java.net.PlainSocketImpl.bind(Unknown Source)
      at java.net.ServerSocket.bind(Unknown Source)
      at java.net.ServerSocket.<init>(Unknown Source)
      at java.net.ServerSocket.<init>(Unknown Source)
      at ConnHandler.run(ConnHandler.java:48)

Where ConnHandler.java is the Server class, and line 48 is this line:

    ServerSocket srv2 = new ServerSocket( port );

Why is it not making a second connection? What would you say is the best way to achieve this?

Regards;
[+][-]04/08/05 04:16 AM, ID: 13734916

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About this solution

Zone: Java Programming Language
Tags: jvm_bind, address, already, socket
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Solution Provided By: guitaristx
Participating Experts: 2
Solution Grade: A
 
 
[+][-]04/08/05 08:57 AM, ID: 13737623

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