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I just started netbeans and tried to open a jsp file.
Created attachment 81279 [details] Threaddump
I am attaching an image of the thread dependencies, the main problem seems to be the parsing api's EventSupport.resetState() accesses TaskProcessor.INTERNAL_LOCK under document writelock.
Created attachment 81463 [details] The threads deps.
*** This issue has been marked as a duplicate of 164258 ***