Seeing too many lsof can't identify protocol

I have a Java process/app. When I run /usr/sbin/lsof -p on that java process, I see a lot of "can't identify protocol". Also, interestingly, File descriptors(FDs) are increasing at a very steady rate. And those FDs that are being created are having description as "can't identify protocol". So, is there any way to instrument/profile the java process so as to nail down who is creating that many FDs.

[tgk]

When lsof prints "Can't identify protocol", ... somewhere in your code you are probably connecting sockets and not closing them properly (perhaps you need a finally block).