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I've noticed that after some time spent working in netbeans, java.exe crashed at me at strange time when i was not doing anything. I checked task manager and found some good 50 java.exe processes running in memory... New java.exe appears each time i run something using F5. I suspected they were debugging sessions, but quick check of debug window showed that there were none. Looks like a bug in debug session cleanup to me... This happens on Win2000 (SP2) and also on Win98 SE if i remember correctly. I think when dialog pops up at me saying there is already a debug session and whether i should start a new one or replace existing session, I selected checkbox to not ask anymore and selected replace... Netbeans version 3.2.1 RC2 (build 89) and also some older releases...
It seems to me like debugger issue.
It is a bug of JDK. Debugged processes are not destroyed when debugging on Hotspot VM. See http://developer.java.sun.com/developer/bugParade/bugs/4420844.html
Wontfix -> Closed