Hi, I have an applet that performs a multicast function on a Linux machine. The browser is Netscape communicator 4.51. The applet is a signed applet and has passed the "Multicast" privilege checking when the applet is executed. Right after the privilege checking, the applet attempts to instantiate a multicastSocket with the following code: DatagramSocket socket = new MulticastSocket (6666); At this point, a SocketException occurrs. The Stack traces are: invalid DatagramSocket option at java.net.PlainDatagramSocketImpl.setOption (PlainDatagramSocketImpl.java:156) at java.net.MulticastCreate (MulticastSocket.java:111) at java.net.DatagramSocket. (DatagramSocket.java:115) at java.net.DatagramSocket. (DatagramSocket.java:101) at java.net.MulticastSocket. (MulticastSocket.java:92) at inria.net.MulticastSession.run (MulticastSession.java:205) applet code at java.lang.Thread.run (Thread.java:504) Note: The same applet running with Netscape communicator 4.51 under Windows is OK. Can someone tell me what's the cause of this problem? Thanks. Larry Hsiao Foresyte Technologies, Inc.
Do you have multicast support compiled into your kernel?
Corfirmed and reported to Netscape. Unfortunately, since we don't control the netscape source code, we can't really fix this.