JNI_CreateJavaVM and IPV6

Question

Hi all,
I met the error on Linux.
Here is the scenario:
My C-code will create a JVM, it find method from a Java Class to execute.
My Java Class create a DatagramSocket with ipv6 address, but it throw a exception:"Exception creating server socket: java.net.SocketException: Protocol family unavailable".
I can not find out the solution to fix this. please help me.
These are some VM options that I add when create JVM
JVM Options:
-Denv.class.path=/opt/abc/xyz
-Djava.class.path=/opt/jre/lib/rt.jar:/opt/jre/lib/i18n.jar:/opt/jre/lib/sunrsasign.jar:/opt/jre/lib/classes:/opt/jre/lib/javaplugin.jar
-Djava.compiler=NONE
-Dapplication.home=/opt/abc
-DDaemon=true
-Djava.net.preferIPv6Addresses=true
vfprintf
=====-DDaemon=====
-DDaemon=true to start upon new Thread (option &)
thanks,
ndt
Edited by: 849647 on Nov 8, 2012 4:00 AM

Answer 1

sorry, this is the full stack trace
java.net.SocketException: Protocol family unavailable
java.net.PlainDatagramSocketImpl.bind0(Native Method)
java.net.AbstractPlainDatagramSocketImpl.bind(AbstractPlainDatagramSocketImpl.java:95)
java.net.DatagramSocket.bind(DatagramSocket.java:376)
java.net.DatagramSocket.<init>(DatagramSocket.java:231)
java.net.DatagramSocket.<init>(DatagramSocket.java:284)
com.lucent.qtek.common.util.Debug$DebugListener.run(Debug.java:237)
java.lang.Thread.run(Thread.java:722)
java.net.SocketException: Protocol family unavailable
     at java.net.PlainDatagramSocketImpl.bind0(Native Method)
     at java.net.AbstractPlainDatagramSocketImpl.bind(AbstractPlainDatagramSocketImpl.java:95)
     at java.net.DatagramSocket.bind(DatagramSocket.java:376)
     at java.net.DatagramSocket.<init>(DatagramSocket.java:231)
     at java.net.DatagramSocket.<init>(DatagramSocket.java:284)
     at com.lucent.qtek.common.util.Debug$DebugListener.run(Debug.java:237)
     at java.lang.Thread.run(Thread.java:722)
And this is my source code
public void run() {
               try {                    
                    String localaddress = "127.0.0.1";
                    if(SystemIPAddrType() == 6)
                         localaddress = "::1";
                    DatagramSocket serv = new DatagramSocket(0, InetAddress.getByName(localaddress));
                    serv.setReceiveBufferSize(ReceiveBufferSize);
It run ok with IPV4 address (127.0.0.1) but throw exception if I use IPV6 addresss ("::1")
====fork()==========
I forked a new process before create a JVM in my C code, if I dont fork new process, it run ok, but i need to fork to run many server services (listening).
The problem: JNI_CreateJavaVM in forked process and supporting IPV6
thanks,
ndt
Edited by: 849647 on Nov 8, 2012 6:30 PM
Edited by: 849647 on Nov 8, 2012 6:36 PM
Edited by: 849647 on Nov 8, 2012 7:55 PM
Edited by: 849647 on Nov 8, 2012 10:30 PM