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Hi I am running fedora core (fc4 32bit) and when i run simple test program from java i get the following error :

java.net.SocketException: Invalid argument or cannot assign requested address

All programs using java (e.g. tomcat) have the same error when executing code trying to use the network however the same version of java running on solaris os has no problem and the program executes flawlessly.

Does anyone know what might be going on?

note: Network access is fine, browsing is fine, ping fine ftp , telnet etc.....
note2: I deliberately installed this version of fedora with no firewall.

Thanks

----------------------
a) here is the program that i wrote to test the network after discovering the problem in tomcat.: (it works fine on sun solaris but causes the below error on fedora)

b) i had to replace the url with the capitalisation below because ic annot post a url on this forum



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

public class network_test {

public static void main(String [] args) {


try {
System.out.println("aa22222");
URL u = new URL("URLCONNECTSTRING GOES HERE");
InputStream in = u.openStream();
System.out.println("a");
int b;
while ((b = in.read()) != -1) {
System.out.write(b);
}
System.out.println("B");

} catch (Exception ex) {
ex.printStackTrace();
}
}

}

-------------------------------------------------

java.net.SocketException: Invalid argument or cannot assign requested address

I am having exactly the same problem. Could not connect to MySQL database. Tested your program - gives the same exception.

java.net.SocketException: Invalid argument or cannot assign requested address

I am also on 32-bit FC4.

Any clues?

I had a java program running fine in Redhat 9, and now I get the same error (with FC4):

java.net.SocketException: java.net.SocketException: Invalid argument or cannot assign requested address
at com.mysql.jdbc.StandardSocketFactory.connect(StandardSocketFactory.java:151)
at com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:280)
at com.mysql.jdbc.Connection.createNewIO(Connection.java:1774)
at com.mysql.jdbc.Connection.<init>(Connection.java:437)
at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:268)
at java.sql.DriverManager.getConnection(DriverManager.java:512)
at java.sql.DriverManager.getConnection(DriverManager.java:193)
at DBConnector.getConnection(DBConnector.java:49)


SQLState: 08S01
VendorError: 0

I found another forum on the same google search that i found this one, and someone said they tried jdk 1.5.0 instead of 1.4.2_08 and said they fixed their problem. I've just set everything up as well, and it seems to work. So it's some sort of problem with Fedora Core 4 and java 1.4.2_08.

Thanks for the hint about using 1.5. I had two problems, however, leading to the
main source, that there are problems with Sockets using Java and Fedora Core IV.
Java, however, in version 1.4.X. I tried out almost every sub version of 1.4 and
had everytime the same result.

Using the actual 1.5 update3 mysql connections do work, and other programs
or classes that are using sockets, like tomcat for example.

Regards

Stephan

Do you have an active SELinux Policy running?
This may prevent your program from creating a socket, check your /var/log/messages file for avc denial messages connected to your java program.
If it is an SELinux problem you will need to either disable SELinux, or alter the context for you java program.

Doesn't FC4 come with GCJ installed? There may also be a compatibility package installed that makes a link from java --> gij.

Take that with a grain of salt though; I'm using Debian Etch instead of FC4, and Sun's Java 1.4.2 instead of GCJ at the moment.

The information in the post by dissonance fixed my problem on Fedora Core 3, Kernel 2.6.12-1.1372_FC3.

Thanks!