Created attachment 102256 [details]
thread dump

My editor has been locking up quite frequently lately, completely unresponsive to user input and providing no visual feedback as to what's going on.  While it has been occurring frequently, I haven't been able to narrow down the exact user action that causes it.

I've been doing heavy Java refactoring (manually, not using the built-in tools) and saving quite frequently.  Sometimes saving is enough, or reflowing the code, or moving a few lines, or simply deleting "throws Exception" from a method signature.  I suspect something relating to scanning, but...

I have to kill and restart the IDE (and lose my unsaved work) to get back to business; on occasion I have taken a thread dump and I believe every time I see the same method in the AWT-EventQueue-1 thread (see attached thread dump for a snapshot of all threads):

"AWT-EventQueue-1" prio=6 tid=0x0000000034008000 nid=0x30a0 runnable [0x000000003adbe000]
   java.lang.Thread.State: RUNNABLE
	at org.netbeans.editor.Annotations$LineAnnotations.getLine(Annotations.java:1016)
	- locked <0x000000002f04b3b0> (a java.util.LinkedList)
	at org.netbeans.editor.Annotations.getNextLineWithAnnotation(Annotations.java:499)
	- locked <0x000000001811b858> (a java.util.ArrayList)
	at org.netbeans.modules.editor.errorstripe.AnnotationViewDataImpl.computeTotalStatus(AnnotationViewDataImpl.java:460)
	at org.netbeans.modules.editor.errorstripe.AnnotationView.drawGlobalStatus(AnnotationView.java:268)
	at org.netbeans.modules.editor.errorstripe.AnnotationView.paintComponent(AnnotationView.java:348)
	at javax.swing.JComponent.paint(JComponent.java:1029)
	at javax.swing.JComponent.paintToOffscreen(JComponent.java:5124)
	at javax.swing.BufferStrategyPaintManager.paint(BufferStrategyPaintManager.java:278)
	at javax.swing.RepaintManager.paint(RepaintManager.java:1224)
	at javax.swing.JComponent._paintImmediately(JComponent.java:5072)
	at javax.swing.JComponent.paintImmediately(JComponent.java:4882)