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Created attachment 118239 [details] stacktrace 7.2 dev throws numerous ClassNotFoundException for various system actions. Sometimes it is thrown on "Delete" action for Java class file , sometimes for other node action. After ClassNotFoundException the IDE becomes unusable. Only its restart fixes the problem. The IDE works until this exception appears once again. It can happen with different action: after restarting the issued action could work. The exception could be thrown by other action. Attached stacktrace is for IDE "Exit" action.
I have few reports of this kind. I have no idea what it could be caused by. Can you reproduce with -Dorg.netbeans.JarClassLoader.level=FINE and attach messages.log
*** Bug 210509 has been marked as a duplicate of this bug. ***
There seems to be a good log attached to bug 210690. That one is not about actions, but seems similar. Closing this bug, if you can generate some better log, feel free to reopen. *** This bug has been marked as a duplicate of bug 210690 ***