Re: Possible XP Socket Bug?

From:

bH <bherbst65@hotmail.com>

Newsgroups:

comp.lang.java.help

Date:

Wed, 18 Mar 2009 21:30:53 -0700 (PDT)

Message-ID:

<e6ab4ade-11a4-4126-a22d-9c8c14a10e20@33g2000yqm.googlegroups.com>

On Mar 11, 12:23 pm, Knute Johnson <nos...@rabbitbrush.frazmtn.com>
wrote:

I was trying to help a fellow with some socket communication on this
group and discovered what I think is a bug in the Windows Socket class.
Making a connection to the localhost should throw a ConnectException
if there is no listening server. The code below does not on my XP comp=

uter.

import java.io.*;
import java.net.*;

public class test {
     public static void main(String[] args) throws Exception {
         Socket s = new Socket("localhost",60000);
         System.out.println(s);
         System.out.println("connected to: " +
s.getInetAddress().getHostName());
         BufferedWriter bw = new BufferedWriter(new OutputStr=

eamWriter(

          s.getOutputStream()));
         bw.write("hello world\n");
         System.out.println("data written");
         bw.close();
         System.out.println(s.isClosed());
     }

}

There was a thread on this the other day and I'm afraid I dismissed it
as another programming error. I'm running Windows XP SP3 and Sun's
1.6.0_12 JDK.

The really bizarre thing is that some of my other code that does socket
comm works perfectly and will throw the exception.

If anybody can reproduce this, please post back.

Thanks,

--

Knute Johnson
email s/nospam/knute2009/

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Hi Knute,
Since no one else has responded to your Q
I offer that I am running Windows XP Service
Pack 3, Sun version jdk1.6.0_07
and have all Apache services running
for Apache2.2 and Tomcat 6.0

I have compiled and run "test" as written by you
and discover these errors

java.net.ConnectException: Connection refused: connect
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.PlainSocketImpl.doConnect(Unknown Source)
at java.net.PlainSocketImpl.connectToAddress(Unknown Source)
at java.net.PlainSocketImpl.connect(Unknown Source)
at java.net.SocksSocketImpl.connect(Unknown Source)
at java.net.Socket.connect(Unknown Source)
at java.net.Socket.connect(Unknown Source)
at java.net.Socket.<init>(Unknown Source)
at java.net.Socket.<init>(Unknown Source)
at test.main(test.java:7)

I then changed program "test" the socket address line to:
Socket s = new Socket("localhost",80);
again compiled and ran "test"
the output written is:

Socket[addr=localhost/127.0.0.1,port=80,localport=1643]
connected to: localhost
data written
true

bH