Here is a thread dump while a refactoring process is running (and IDE is hung):

------------------------------------------------------------------------
2013-12-11 19:15:28
Full thread dump Java HotSpot(TM) 64-Bit Server VM (24.45-b08 mixed mode):

"Inactive RequestProcessor thread [Was:Project UI/org.netbeans.modules.project.ui.ProjectsRootNode$BadgingNode]" daemon prio=5 tid=0x00007fa5839a7800 nid=0x1063f in Object.wait() [0x0000000124661000]
   java.lang.Thread.State: TIMED_WAITING (on object monitor)
	at java.lang.Object.wait(Native Method)
	- waiting on <0x00000007fa41b728> (a java.lang.Object)
	at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:1987)
	- locked <0x00000007fa41b728> (a java.lang.Object)

"Inactive RequestProcessor thread [Was:org.netbeans.modules.maven.nodes.AnnotatedAbstractNode/org.netbeans.modules.maven.nodes.ProjectFilesNode]" daemon prio=5 tid=0x00007fa58a48e000 nid=0x13987 in Object.wait() [0x0000000120878000]
   java.lang.Thread.State: TIMED_WAITING (on object monitor)
	at java.lang.Object.wait(Native Method)
	- waiting on <0x00000007fa41c048> (a java.lang.Object)
	at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:1987)
	- locked <0x00000007fa41c048> (a java.lang.Object)

"Attach Listener" daemon prio=5 tid=0x00007fa58c899000 nid=0x10a57 waiting on condition [0x0000000000000000]
   java.lang.Thread.State: RUNNABLE

"org.netbeans.modules.refactoring.spi.impl.RefactoringPanel" daemon prio=5 tid=0x00007fa582883800 nid=0x9033 in Object.wait() [0x000000011d7cb000]
   java.lang.Thread.State: WAITING (on object monitor)
	at java.lang.Object.wait(Native Method)
	- waiting on <0x00000007f64ce7a0> (a java.awt.EventQueue$1AWTInvocationLock)
	at java.lang.Object.wait(Object.java:503)
	at java.awt.EventQueue.invokeAndWait(EventQueue.java:1266)
	- locked <0x00000007f64ce7a0> (a java.awt.EventQueue$1AWTInvocationLock)
	at java.awt.EventQueue.invokeAndWait(EventQueue.java:1247)
	at javax.swing.SwingUtilities.invokeAndWait(SwingUtilities.java:1349)
	at org.netbeans.modules.refactoring.spi.impl.RefactoringPanel.createNode(RefactoringPanel.java:505)
	at org.netbeans.modules.refactoring.spi.impl.RefactoringPanel.access$1200(RefactoringPanel.java:104)
	at org.netbeans.modules.refactoring.spi.impl.RefactoringPanel$4.run(RefactoringPanel.java:788)
	at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1432)
	at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2042)

"Inactive RequestProcessor thread [Was:org.netbeans.spi.java.project.support.ui.PackageRootNode/org.netbeans.spi.java.project.support.ui.PackageRootNode]" daemon prio=5 tid=0x00007fa58c918000 nid=0x13c5b in Object.wait() [0x000000011d5c8000]
   java.lang.Thread.State: TIMED_WAITING (on object monitor)
	at java.lang.Object.wait(Native Method)
	- waiting on <0x00000007fa54d0f8> (a java.lang.Object)
	at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:1987)
	- locked <0x00000007fa54d0f8> (a java.lang.Object)

"Inactive RequestProcessor thread [Was:JarFs - modification watcher/org.openide.filesystems.JarFileSystem$2]" daemon prio=5 tid=0x00007fa582b95800 nid=0xd43f in Object.wait() [0x0000000115b92000]
   java.lang.Thread.State: TIMED_WAITING (on object monitor)
	at java.lang.Object.wait(Native Method)
	- waiting on <0x00000007fa493ec8> (a java.lang.Object)
	at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:1987)
	- locked <0x00000007fa493ec8> (a java.lang.Object)

"Editor Parsing Loop (201310111528)" daemon prio=5 tid=0x00007fa58a1b6000 nid=0x13d03 waiting on condition [0x0000000120a7b000]
   java.lang.Thread.State: WAITING (parking)
	at sun.misc.Unsafe.park(Native Method)
	- parking to wait for  <0x00000007d4afcb68> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
	at java.util.concurrent.locks.LockSupport.park(LockSupport.java:186)
	at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2043)
	at java.util.concurrent.PriorityBlockingQueue.take(PriorityBlockingQueue.java:539)
	at org.netbeans.modules.parsing.impl.TaskProcessor$CompilationJob.run(TaskProcessor.java:665)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
	at java.util.concurrent.FutureTask.run(FutureTask.java:262)
	at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1432)
	at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2042)

"DestroyJavaVM" prio=5 tid=0x00007fa5852af800 nid=0x1903 waiting on condition [0x0000000000000000]
   java.lang.Thread.State: RUNNABLE

"TimerQueue" daemon prio=5 tid=0x00007fa585a42800 nid=0x11e03 waiting on condition [0x000000011e4c2000]
   java.lang.Thread.State: TIMED_WAITING (parking)
	at sun.misc.Unsafe.park(Native Method)
	- parking to wait for  <0x00000007d145b248> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
	at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:226)
	at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2082)
	at java.util.concurrent.DelayQueue.take(DelayQueue.java:220)
	at javax.swing.TimerQueue.run(TimerQueue.java:171)
	at java.lang.Thread.run(Thread.java:744)

"Worker-JM" prio=5 tid=0x00007fa583953000 nid=0x11c07 in Object.wait() [0x000000011e01f000]
   java.lang.Thread.State: WAITING (on object monitor)
	at java.lang.Object.wait(Native Method)
	- waiting on <0x00000007d1233490> (a java.util.ArrayList)
	at org.eclipse.core.internal.jobs.InternalWorker.run(InternalWorker.java:58)
	- locked <0x00000007d1233490> (a java.util.ArrayList)

"Thread-5" daemon prio=5 tid=0x00007fa5853e5800 nid=0x11627 in Object.wait() [0x000000011a890000]
   java.lang.Thread.State: WAITING (on object monitor)
	at java.lang.Object.wait(Native Method)
	- waiting on <0x00000007d0992210> (a java.util.LinkedList)
	at java.lang.Object.wait(Object.java:503)
	at java.util.prefs.AbstractPreferences$EventDispatchThread.run(AbstractPreferences.java:1476)
	- locked <0x00000007d0992210> (a java.util.LinkedList)

"File Watcher" daemon prio=5 tid=0x00007fa584945000 nid=0x11403 waiting on condition [0x000000011dbe9000]
   java.lang.Thread.State: WAITING (parking)
	at sun.misc.Unsafe.park(Native Method)
	- parking to wait for  <0x00000007d11133c0> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
	at java.util.concurrent.locks.LockSupport.park(LockSupport.java:186)
	at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2043)
	at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)
	at org.netbeans.modules.masterfs.watcher.macosx.OSXNotifier.nextEvent(OSXNotifier.java:105)
	at org.netbeans.modules.masterfs.providers.Notifier$1.nextEvent(Notifier.java:119)
	at org.netbeans.modules.masterfs.watcher.Watcher$Ext.run(Watcher.java:304)
	at java.lang.Thread.run(Thread.java:744)

"Thread-3" daemon prio=5 tid=0x00007fa585bfa000 nid=0x10b03 runnable [0x000000011d9e6000]
   java.lang.Thread.State: RUNNABLE
	at com.sun.jna.Native.invokeVoid(Native Method)
	at com.sun.jna.Function.invoke(Function.java:328)
	at com.sun.jna.Function.invoke(Function.java:276)
	at com.sun.jna.Library$Handler.invoke(Library.java:216)
	at com.sun.proxy.$Proxy2.CFRunLoopRun(Unknown Source)
	at org.netbeans.modules.masterfs.watcher.macosx.OSXNotifier$1.run(OSXNotifier.java:126)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	at java.lang.Thread.run(Thread.java:744)

"Bundle File Closer" daemon prio=5 tid=0x00007fa583e42000 nid=0x10103 in Object.wait() [0x000000011ad85000]
   java.lang.Thread.State: WAITING (on object monitor)
	at java.lang.Object.wait(Native Method)
	- waiting on <0x00000007d0968130> (a org.eclipse.osgi.framework.eventmgr.EventManager$EventThread)
	at java.lang.Object.wait(Object.java:503)
	at org.eclipse.osgi.framework.eventmgr.EventManager$EventThread.getNextEvent(EventManager.java:400)
	- locked <0x00000007d0968130> (a org.eclipse.osgi.framework.eventmgr.EventManager$EventThread)
	at org.eclipse.osgi.framework.eventmgr.EventManager$EventThread.run(EventManager.java:336)

"Framework Event Dispatcher" daemon prio=5 tid=0x00007fa582b3f000 nid=0xff03 in Object.wait() [0x000000011ab82000]
   java.lang.Thread.State: WAITING (on object monitor)
	at java.lang.Object.wait(Native Method)
	- waiting on <0x00000007d09682b0> (a org.eclipse.osgi.framework.eventmgr.EventManager$EventThread)
	at java.lang.Object.wait(Object.java:503)
	at org.eclipse.osgi.framework.eventmgr.EventManager$EventThread.getNextEvent(EventManager.java:400)
	- locked <0x00000007d09682b0> (a org.eclipse.osgi.framework.eventmgr.EventManager$EventThread)
	at org.eclipse.osgi.framework.eventmgr.EventManager$EventThread.run(EventManager.java:336)

"Framework Active Thread" prio=5 tid=0x00007fa583220800 nid=0xf707 in Object.wait() [0x000000011a48a000]
   java.lang.Thread.State: TIMED_WAITING (on object monitor)
	at java.lang.Object.wait(Native Method)
	- waiting on <0x00000007d0801b50> (a org.eclipse.osgi.framework.internal.core.Framework)
	at org.eclipse.osgi.framework.internal.core.Framework.run(Framework.java:1863)
	- locked <0x00000007d0801b50> (a org.eclipse.osgi.framework.internal.core.Framework)
	at java.lang.Thread.run(Thread.java:744)

"AWT-EventQueue-0" prio=5 tid=0x00007fa583194800 nid=0xdd07 in Object.wait() [0x0000000115e23000]
   java.lang.Thread.State: WAITING (on object monitor)
	at java.lang.Object.wait(Native Method)
	- waiting on <0x00000007d03bfab8> (a sun.java2d.opengl.OGLRenderQueue$QueueFlusher)
	at java.lang.Object.wait(Object.java:503)
	at sun.java2d.opengl.OGLRenderQueue$QueueFlusher.flushNow(OGLRenderQueue.java:181)
	- locked <0x00000007d03bfab8> (a sun.java2d.opengl.OGLRenderQueue$QueueFlusher)
	at sun.java2d.opengl.OGLRenderQueue.flushNow(OGLRenderQueue.java:129)
	at sun.java2d.opengl.OGLBlitLoops.Blit(OGLBlitLoops.java:283)
	at sun.java2d.opengl.OGLSwToSurfaceBlit.Blit(OGLBlitLoops.java:567)
	at sun.java2d.pipe.DrawImage.blitSurfaceData(DrawImage.java:955)
	at sun.java2d.pipe.DrawImage.renderImageCopy(DrawImage.java:576)
	at sun.java2d.pipe.DrawImage.tryCopyOrScale(DrawImage.java:294)
	at sun.java2d.pipe.DrawImage.transformImage(DrawImage.java:256)
	at sun.java2d.pipe.DrawImage.scaleImage(DrawImage.java:124)
	at sun.java2d.pipe.DrawImage.scaleImage(DrawImage.java:1046)
	at sun.java2d.pipe.ValidatePipe.scaleImage(ValidatePipe.java:207)
	at sun.java2d.SunGraphics2D.drawImage(SunGraphics2D.java:3125)
	at sun.java2d.SunGraphics2D.drawImage(SunGraphics2D.java:3065)
	at com.apple.laf.AquaPainter$AquaSingleImagePainter.paintFromSingleCachedImage(AquaPainter.java:171)
	at com.apple.laf.AquaPainter$AquaSingleImagePainter.paint(AquaPainter.java:140)
	at com.apple.laf.AquaPainter.paint(AquaPainter.java:89)
	at com.apple.laf.AquaProgressBarUI.paint(AquaProgressBarUI.java:183)
	at com.apple.laf.AquaProgressBarUI.paint(AquaProgressBarUI.java:164)
	at javax.swing.plaf.ComponentUI.update(ComponentUI.java:161)
	at javax.swing.JComponent.paintComponent(JComponent.java:778)
	at javax.swing.JComponent.paint(JComponent.java:1054)
	at javax.swing.JComponent.paintChildren(JComponent.java:887)
	- locked <0x00000007d0079268> (a java.awt.Component$AWTTreeLock)
	at javax.swing.JComponent.paint(JComponent.java:1063)
	at javax.swing.JComponent.paintChildren(JComponent.java:887)
	- locked <0x00000007d0079268> (a java.awt.Component$AWTTreeLock)
	at javax.swing.JComponent.paint(JComponent.java:1063)
	at javax.swing.JComponent.paintToOffscreen(JComponent.java:5219)
	at javax.swing.RepaintManager$PaintManager.paintDoubleBuffered(RepaintManager.java:1529)
	at javax.swing.RepaintManager$PaintManager.paint(RepaintManager.java:1452)
	at javax.swing.RepaintManager.paint(RepaintManager.java:1249)
	at javax.swing.JComponent._paintImmediately(JComponent.java:5167)
	at javax.swing.JComponent.paintImmediately(JComponent.java:4978)
	at javax.swing.RepaintManager$3.run(RepaintManager.java:808)
	at javax.swing.RepaintManager$3.run(RepaintManager.java:796)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
	at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:796)
	at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:769)
	at javax.swing.RepaintManager.prePaintDirtyRegions(RepaintManager.java:718)
	at javax.swing.RepaintManager.access$1100(RepaintManager.java:62)
	at javax.swing.RepaintManager$ProcessingRunnable.run(RepaintManager.java:1677)
	at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:251)
	at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:733)
	at java.awt.EventQueue.access$200(EventQueue.java:103)
	at java.awt.EventQueue$3.run(EventQueue.java:694)
	at java.awt.EventQueue$3.run(EventQueue.java:692)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:703)
	at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:159)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242)
	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:91)

"Java2D Disposer" daemon prio=5 tid=0x00007fa58205c800 nid=0xd203 in Object.wait() [0x00000001153ac000]
   java.lang.Thread.State: WAITING (on object monitor)
	at java.lang.Object.wait(Native Method)
	- waiting on <0x00000007d00ab908> (a java.lang.ref.ReferenceQueue$Lock)
	at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:135)
	- locked <0x00000007d00ab908> (a java.lang.ref.ReferenceQueue$Lock)
	at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:151)
	at sun.java2d.Disposer.run(Disposer.java:145)
	at java.lang.Thread.run(Thread.java:744)

"Java2D Queue Flusher" daemon prio=5 tid=0x00007fa58287c000 nid=0xc807 runnable [0x000000011403f000]
   java.lang.Thread.State: RUNNABLE
	at sun.java2d.opengl.OGLRenderQueue.flushBuffer(Native Method)
	at sun.java2d.opengl.OGLRenderQueue.flushBuffer(OGLRenderQueue.java:153)
	at sun.java2d.opengl.OGLRenderQueue.access$100(OGLRenderQueue.java:40)
	at sun.java2d.opengl.OGLRenderQueue$QueueFlusher.run(OGLRenderQueue.java:231)
	- locked <0x00000007d03bfab8> (a sun.java2d.opengl.OGLRenderQueue$QueueFlusher)

"RequestProcessor queue manager" daemon prio=5 tid=0x00007fa583125000 nid=0x8207 in Object.wait() [0x0000000113e3c000]
   java.lang.Thread.State: TIMED_WAITING (on object monitor)
	at java.lang.Object.wait(Native Method)
	- waiting on <0x00000007d028a1a8> (a java.lang.Class for org.openide.util.RequestProcessor$TickTac)
	at org.openide.util.RequestProcessor$TickTac.obtainFirst(RequestProcessor.java:2265)
	- locked <0x00000007d028a1a8> (a java.lang.Class for org.openide.util.RequestProcessor$TickTac)
	at org.openide.util.RequestProcessor$TickTac.run(RequestProcessor.java:2241)

"AWT-Shutdown" prio=5 tid=0x00007fa582846800 nid=0x790b in Object.wait() [0x000000011152e000]
   java.lang.Thread.State: WAITING (on object monitor)
	at java.lang.Object.wait(Native Method)
	- waiting on <0x00000007d02554c8> (a java.lang.Object)
	at java.lang.Object.wait(Object.java:503)
	at sun.awt.AWTAutoShutdown.run(AWTAutoShutdown.java:287)
	- locked <0x00000007d02554c8> (a java.lang.Object)
	at java.lang.Thread.run(Thread.java:744)

"AppKit Thread" daemon prio=5 tid=0x00007fa583030800 nid=0x507 runnable [0x00007fff5b963000]
   java.lang.Thread.State: RUNNABLE
	at sun.lwawt.macosx.LWCToolkit.doAWTRunLoop(Native Method)
	at sun.lwawt.macosx.LWCToolkit.invokeAndWait(LWCToolkit.java:549)
	at sun.lwawt.macosx.LWCToolkit.invokeAndWait(LWCToolkit.java:489)
	at sun.lwawt.macosx.CAccessibility.invokeAndWait(CAccessibility.java:75)
	at sun.lwawt.macosx.CAccessibility.getFocusOwner(CAccessibility.java:521)

"CLI Requests Server" daemon prio=5 tid=0x00007fa585009800 nid=0x5903 runnable [0x000000010f5c7000]
   java.lang.Thread.State: RUNNABLE
	at java.net.PlainSocketImpl.socketAccept(Native Method)
	at java.net.AbstractPlainSocketImpl.accept(AbstractPlainSocketImpl.java:398)
	at java.net.ServerSocket.implAccept(ServerSocket.java:530)
	at java.net.ServerSocket.accept(ServerSocket.java:498)
	at org.netbeans.CLIHandler$Server.run(CLIHandler.java:1100)

"Active Reference Queue Daemon" daemon prio=5 tid=0x00007fa58302b800 nid=0x5703 in Object.wait() [0x000000010f3c4000]
   java.lang.Thread.State: TIMED_WAITING (on object monitor)
	at java.lang.Object.wait(Native Method)
	- waiting on <0x00000007d0396810> (a java.lang.ref.ReferenceQueue$Lock)
	at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:135)
	- locked <0x00000007d0396810> (a java.lang.ref.ReferenceQueue$Lock)
	at org.openide.util.lookup.implspi.ActiveQueue$Daemon.run(ActiveQueue.java:180)
	- locked <0x00000007d0396810> (a java.lang.ref.ReferenceQueue$Lock)

"Service Thread" daemon prio=5 tid=0x00007fa582815800 nid=0x5303 runnable [0x0000000000000000]
   java.lang.Thread.State: RUNNABLE

"C2 CompilerThread1" daemon prio=5 tid=0x00007fa582815000 nid=0x5103 waiting on condition [0x0000000000000000]
   java.lang.Thread.State: RUNNABLE

"C2 CompilerThread0" daemon prio=5 tid=0x00007fa58484f800 nid=0x4f03 waiting on condition [0x0000000000000000]
   java.lang.Thread.State: RUNNABLE

"Signal Dispatcher" daemon prio=5 tid=0x00007fa58484c800 nid=0x4d03 runnable [0x0000000000000000]
   java.lang.Thread.State: RUNNABLE

"Finalizer" daemon prio=5 tid=0x00007fa58280e000 nid=0x3903 in Object.wait() [0x000000010e7c1000]
   java.lang.Thread.State: WAITING (on object monitor)
	at java.lang.Object.wait(Native Method)
	- waiting on <0x00000007d01aa0d8> (a java.lang.ref.ReferenceQueue$Lock)
	at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:135)
	- locked <0x00000007d01aa0d8> (a java.lang.ref.ReferenceQueue$Lock)
	at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:151)
	at java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:189)

"Reference Handler" daemon prio=5 tid=0x00007fa58280b800 nid=0x3703 in Object.wait() [0x000000010e5be000]
   java.lang.Thread.State: WAITING (on object monitor)
	at java.lang.Object.wait(Native Method)
	- waiting on <0x00000007d03e5ce8> (a java.lang.ref.Reference$Lock)
	at java.lang.Object.wait(Object.java:503)
	at java.lang.ref.Reference$ReferenceHandler.run(Reference.java:133)
	- locked <0x00000007d03e5ce8> (a java.lang.ref.Reference$Lock)

"VM Thread" prio=5 tid=0x00007fa584849000 nid=0x3503 runnable 

"GC task thread#0 (ParallelGC)" prio=5 tid=0x00007fa585803800 nid=0x2503 runnable 

"GC task thread#1 (ParallelGC)" prio=5 tid=0x00007fa583003800 nid=0x2703 runnable 

"GC task thread#2 (ParallelGC)" prio=5 tid=0x00007fa583004800 nid=0x2903 runnable 

"GC task thread#3 (ParallelGC)" prio=5 tid=0x00007fa583005000 nid=0x2b03 runnable 

"GC task thread#4 (ParallelGC)" prio=5 tid=0x00007fa584802000 nid=0x2d03 runnable 

"GC task thread#5 (ParallelGC)" prio=5 tid=0x00007fa58480b800 nid=0x2f03 runnable 

"GC task thread#6 (ParallelGC)" prio=5 tid=0x00007fa58480c000 nid=0x3103 runnable 

"GC task thread#7 (ParallelGC)" prio=5 tid=0x00007fa58480d000 nid=0x3303 runnable 

"VM Periodic Task Thread" prio=5 tid=0x00007fa582816800 nid=0x5503 waiting on condition 

JNI global references: 3687