While editing java source code the IDE deadlocked. GUI is no longer refreshed and process consumes 100% CPU.
Created attachment 117523 [details]
Not sure where does this belong. Due to a block in org.netbeans.modules.project.ui.ProjectTab reassigning to Project. Please re-assign if this is incorrect.
Not P1 unless this happens consistently.
Thread dump does not look like a deadlock to me, and mention of 100% CPU also suggests some other problem. I do not think there is enough information here to evaluate - probably need a profiler snapshot at a minimum - but assigning to Nodes component in case evaluator has some idea why two threads would both be waiting for read access to its mutex.
The state of AWT dispatch thread seems to indicate you have tried to paste something into explorer. That does not match your original issue description. Closing as invalid report.