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Operating Systems SCO address already in use
# 1  
Old 07-20-2006
address already in use
The following code, when run under Linux (any variant) runs fine, but when I run it under SCO Openserver 5.0.7 i get an "address already in use" error. I had resoved this issue some time ago by doing something and now i do not recall. I have already confirmed the port 5510 is not in use by any process in the system at any time. Any information or advice would be greatly appreciated.

rmurtagh

CODE:

Code:
package javaclient;

import java.io.ByteArrayInputStream;
import java.io.InputStream;
import java.lang.*;
import java.io.*;
import java.net.*;
import org.apache.axis.client.Call;
import org.apache.axis.client.Service;
import org.apache.axis.message.SOAPEnvelope;

public class getresv {

  public boolean execute() {
    boolean retBool = true;
    String xmlinput;
    String endpoint;
    try
    {
      System.out.print("\n\nStarted");
      ServerSocket welcomeSocket = new ServerSocket(5510);
      Socket connectionSocket = welcomeSocket.accept();
      System.out.print("\n\nServer has connected!");

      BufferedReader inFromClient = new BufferedReader(new InputStreamReader(connectionSocket.getInputStream()));
      DataOutputStream outToClient = new DataOutputStream(connectionSocket.getOutputStream());

      xmlinput = inFromClient.readLine();

      System.out.print("\n\nxml in: " + xmlinput);

      endpoint = inFromClient.readLine();

      System.out.print("\n\nendpoint: " + endpoint);

      StringBuffer xmlBuffer = new StringBuffer();
      xmlBuffer.append(xmlinput);
      
      ByteArrayInputStream byteIn = new ByteArrayInputStream(xmlBuffer.toString().getBytes());
      InputStream input = byteIn;

      SOAPEnvelope reqMsg = new SOAPEnvelope(input);
      String websrvendpt = endpoint;
      Service webService = new Service();
      Call call = (Call)webService.createCall();
      call.setTargetEndpointAddress(websrvendpt);
      call.setTimeout(new Integer(1000000));

      System.out.println("\n\nOutgoing:\n" + reqMsg);

      SOAPEnvelope xmlin = (SOAPEnvelope)call.invoke(reqMsg);
      String respMsg = xmlin.toString();

      System.out.println("\n\nIncoming:\n" + respMsg + "\n");
      
      outToClient.writeBytes(respMsg + '\n');

      Thread.sleep(1000);

      System.out.println("\n\nSent response to PMS...\n");

      connectionSocket.close();
      welcomeSocket.close();
    }
    catch (UnknownHostException ex) {
      System.out.println("\n\nUnknown Ssytem Error: " + ex.getMessage());
    }
    catch (Exception ex) {
      System.out.println("\n\nError: " + ex.getMessage());
    }
    return retBool;
  }

   public static void main(String[] args) throws Exception {
   boolean retBool = (new getresv()).execute();
  }
}

Last edited by reborg; 07-20-2006 at 12:31 PM.. Reason: code tags
# 2  
Old 07-20-2006
It appears that there is something already bound to port 5510. How did you confirm that there was not?

Another instance of your program still running, or some other service. You'll need to either change your port number or stop the other process which is bound to that port.
# 3  
Old 07-20-2006
There are no other instances of the program running.
I used netstat -an to determine the port was not in use.
Changing the port yields the same results using ports in the well known range but unused or in the ephemeral range if i run the program directly from the command prompt or from a script.

Code:
# netstat -an
Active Internet connections (including servers)
Proto Recv-Q Send-Q  Local Address          Foreign Address        (state)
tcp        0      2  192.168.255.3.23       216.216.34.226.23015   ESTABLISHED
tcp        0      0  192.168.255.3.23       216.216.34.226.10797   ESTABLISHED
tcp        0      0  192.168.255.3.23       192.168.255.2.1110     ESTABLISHED
tcp        0      0  192.168.255.3.23       192.168.255.1.1097     ESTABLISHED
tcp        0      0  *.8457                 *.*                    LISTEN
tcp        0      0  *.615                  *.*                    LISTEN
tcp        0      0  *.80                   *.*                    LISTEN
tcp        0      0  *.587                  *.*                    LISTEN
tcp        0      0  *.25                   *.*                    LISTEN
tcp        0      0  *.*                    *.*                    CLOSED
tcp        0      0  *.801                  *.*                    LISTEN
tcp        0      0  *.1025                 *.*                    LISTEN
tcp        0      0  *.1024                 *.*                    LISTEN
tcp        0      0  *.22                   *.*                    LISTEN
tcp        0      0  *.199                  *.*                    LISTEN
tcp        0      0  *.143                  *.*                    LISTEN
tcp        0      0  *.110                  *.*                    LISTEN
tcp        0      0  *.37                   *.*                    LISTEN
tcp        0      0  *.13                   *.*                    LISTEN
tcp        0      0  *.19                   *.*                    LISTEN
tcp        0      0  *.9                    *.*                    LISTEN
tcp        0      0  *.7                    *.*                    LISTEN
tcp        0      0  *.1                    *.*                    LISTEN
tcp        0      0  *.79                   *.*                    LISTEN
tcp        0      0  *.512                  *.*                    LISTEN
tcp        0      0  *.513                  *.*                    LISTEN
tcp        0      0  *.514                  *.*                    LISTEN
tcp        0      0  *.23                   *.*                    LISTEN
tcp        0      0  *.21                   *.*                    LISTEN
tcp        0      0  *.111                  *.*                    LISTEN
udp        0      0  *.801                  *.*
udp        0      0  *.986                  *.*
udp        0      0  *.985                  *.*
udp        0      0  *.1066                 *.*
udp        0      0  *.1027                 *.*
udp        0      0  *.161                  *.*
udp        0      0  *.37                   *.*
udp        0      0  *.13                   *.*
udp        0      0  *.19                   *.*
udp        0      0  *.9                    *.*
udp        0      0  *.7                    *.*
udp        0      0  *.518                  *.*
udp        0      0  *.512                  *.*
udp        0      0  *.*                    *.*
udp        0      0  *.1026                 *.*
udp        0      0  *.1025                 *.*
udp        0      0  *.111                  *.*
udp        0      0  *.1024                 *.*
udp        0      0  *.488                  *.*
udp        0      0  *.*                    *.*
Active UNIX domain sockets
Address      Type       Recv-Q      Send-Q     Conn        Addr
fce2aac0     dgram           0           0 fce288b8
fce2abe0     dgram           0           0 fce288b8
fce28558     dgram           0           0 fce288b8
fce284c8     stream          0           0        0        /etc/egd-pool
fce2ac70     dgram           0           0 fce288b8
fce29ea8     dgram           0           0 fce288b8
fce28708     stream          0           0        0        /pmd/IPCST_pipe
fce28798     stream          0           0        0        /pmd/IPCCT_pipe
fce28828     dgram           0           0 fce288b8
fce288b8     dgram           0           0        0        /dev/syslog
#

# 4  
Old 07-20-2006
change
Code:
    catch (Exception ex) {
      System.out.println("\n\nError: " + ex.getMessage());
    }

to
Code:
    catch (Exception ex) {
      ex.printStackTrace();
    }

There may be something more useful than just the error message in the stacktrace.
# 5  
Old 07-20-2006
The results of your suggested change:

Code:
DB/C 14 IMAG10.2>cat java.error
java.net.BindException: Address already in use
        at java.net.PlainSocketImpl.socketBind(Native Method)
        at java.net.PlainSocketImpl.bind(PlainSocketImpl.java:447)
        at java.net.ServerSocket.<init>(ServerSocket.java:165)
        at java.net.ServerSocket.<init>(ServerSocket.java:77)
        at javaclient.getresv.execute(getresv.java, Compiled Code)
        at javaclient.getresv.main(getresv.java:75)
DB/C 14 IMAG10.2>

Last edited by rmurtagh; 07-20-2006 at 01:18 PM..
# 6  
Old 07-20-2006
I started poking around the OS with other sockets that were in use and found some very odd errors. I relinked the kernel and rebooted and the error has gone away. Thank you for your time. I know it is as valuable to you as mine is to me.

(very nice forums btw - i noticed you edited my 1st post and assume you are at least a moderator)
# 7  
Old 07-20-2006
A good outcome.

Yes, I am a Mod here, the edit was just so the code came out correctly indented.
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