Although it seems trivial, it is vital for automated tests. When I Finish
Debugger Session I need to know that debugger really finished. That's why I wait
for message "User program finished". But it is not printed out sometimes. It is
because DebuggerOutput.destroy() is called before property change of
JPDADebugger.STATE_DISCONNECTED is fired. Trying to investigate it why I found
out that JPDADebuggerImpl.finish is called by two threads from
StartActionProvider.java:224 and KillActionProvider. Please, look at attached
log messages. It shows these two concurrent threads and property change
STATE_DISCONNECTED is never called. Could it be somehow synchronized or fixed a
different way? These issues might be also interesting: 44412, 56233.

I reproduced it also manually:

- create web project
- set Swing HTML browser as default
- add breakpoint to index.jsp
- start debugger and wait until it stops at breakpoint
- call Continue from main menu
- quickly after previous action call Finish Debugger Session from main menu.
Debugger seems to be stopped but "User program finished" message is never displayed.

Build 20060111-0429, JDK1.5.0_06, WindowsXP.