You can enable debugging messages by using the -Dcom.sun.sdp.debug flag. If you specify a file, the messages will be output to that file. Otherwise, the messages will be printed to standard output.
This first example shows sample messages printed to standard output:
% java -Dcom.sun.sdp.conf=sdp.conf -Dcom.sun.sdp.debug ExampleApplicaton BIND to 192.0.2.1:5000 (socket converted to SDP protocol) CONNECT to 129.156.232.160:80 (no match) CONNECT to 192.0.2.2:80 (socket converted to SDP protocol)
This second example shows the output redirected to a file named debug.log:
% java -Dcom.sun.sdp.conf=sdp.conf -Dcom.sun.sdp.debug=debug.log ExampleApplication [1] 27310 % tail -f debug.log BIND to 192.0.2.1:5000 (socket converted to SDP protocol)