Application not responding, process missing

I have an odd issue. Sometimes it happens that application (happens almost always to NetBeans) is stuck in the dock with "Not Responding" - I can't open it, if I select "Force quit" id doesn't do anything (both from dock and from "Force quit" window.

The most annoying thing - there is no associated process that I could kill!

The only way to start application again is to restart the whole osx, which is PITA.

How can I force-force-quit of such application?