I want to remote debug in jnlp application. This problem solved is very simple. I set environment variable JAVAWS_VM_ARGS to value: -Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=n,address=5006
After this, I create new run point in Intelli J IDEA. Type of run point is Remote debug. In run point set set host=localhost and port=5006(or other, ports in JAVAWS_VM_ARGS and run point must be equals).
All is ok, run jnlp and created run point.