I have a java process (Glassfish) which is leaking file descriptors. I know this because I get the helpful
java.io.IOException: Too many open files exception. I can look in /proc/PID#/fd and see all the open file descriptors. When I use lsof I get a very large number of entries like this:
java 18510 root 8811u sock 0,4 1576079 can't identify protocol
java 18510 root 8812u sock 0,4 1576111 can't identify protocol
java 18510 root 8813u sock 0,4 1576150 can't identify protocol
I see 12 new ones created per minute. What options can I use on lsof or what other tools are available to me to help track down socket file descriptors where the protocol can't be identified?