Solved

java.net. SocketException: Descriptor not a Socket

Posted on 1997-08-20
2
1,760 Views
Last Modified: 2008-03-17
What in god's name does this mean?  I'm passing a socket to the constructor of a Thread subclass.  This class consists of ONLY this constructor and a run() method that prints to the output stream of the socket. When I call the run() explicitly it WORKS. But, when I call start() on the object (which call the run() method) it gives me the message in the title.  WHY?

e.g. (note I'm leaving out code for simplicity, including the try & catch block where I caught the error, but it occurs when I flush the BufferedStreamWriter)

import java.net.Socket;
import java.io.*;
public class a extends Thread{
    Socket moSocket = null;
    public a(Socket poSocket){
      moSocket = poSocket;
    }
    public void run(){
      //Assume that I defined a BufferedStreamWriter with       //the socket already.
      bsw.write("Testing");
      bsw.flush();
    }
}

 
0
Comment
Question by:ho174
2 Comments
 

Author Comment

by:ho174
ID: 1225442
Forgive me for my forgetfulness.  There is no BufferedStreamWriter, rather it was a BufferedWriter that encapsulated the OutputStreamWriter, which encapsulated the Socket.getOutputStream().  This note was just for clarification, I still have that error.  Thanks for the help
0
 
LVL 2

Accepted Solution

by:
aleshka earned 40 total points
ID: 1225443
It look like you do something "bad" with this socket in method which calls a's start(), directly after this call. (for example: simple close the socket). So, if you call run method, which doesn't returns immediately - its ok, but when you try to call start, which will run the new thread and return at the same time, you have time to kill the socket before it will start to work.
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

An old method to applying the Singleton pattern in your Java code is to check if a static instance, defined in the same class that needs to be instantiated once and only once, is null and then create a new instance; otherwise, the pre-existing insta…
Java functions are among the best things for programmers to work with as Java sites can be very easy to read and prepare. Java especially simplifies many processes in the coding industry as it helps integrate many forms of technology and different d…
Viewers will learn about the regular for loop in Java and how to use it. Definition: Break the for loop down into 3 parts: Syntax when using for loops: Example using a for loop:
This video teaches viewers about errors in exception handling.

911 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

21 Experts available now in Live!

Get 1:1 Help Now