Exception in JOSM, ui fails to render correctly

[openstreetmap@…]

What steps will reproduce the problem?

1. I have not tried to reproduce it, but the Linux machine was in sleep mode and after waking up this happened
2. In case it matters, I had loaded gps-tagged images (shown as camera icons on the map) and also *.gpx tracks into JOSM

What is the expected result?

What happens instead?

The screen does not render properly (map view is blank, panels to the right have some buttons but mostly no content)

Please provide any additional information below. Attach a screenshot if possible.

Revision: 8279
Repository Root: http://josm.openstreetmap.de/svn
Relative URL: ^/trunk
Last Changed Author: Klumbumbus
Last Changed Date: 2015-04-26 22:42:34 +0200 (Sun, 26 Apr 2015)
Build-Date: 2015-04-27 01:31:19
URL: http://josm.openstreetmap.de/svn/trunk
Repository UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Last Changed Rev: 8279

Identification: JOSM/1.5 (8279 en) Linux Ubuntu 13.10
Memory Usage: 1480 MB / 3557 MB (428 MB allocated, but free)
Java version: 1.8.0_31, Oracle Corporation, Java HotSpot(TM) 64-Bit Server VM
Dataset consistency test: No problems found

Plugins:
- PicLayer (30962)
- buildings_tools (31100)
- contourmerge (1013)
- graphview (30892)
- walkingpapers (30892)

Last errors/warnings:
- E: java.lang.ClassCastException: sun.awt.image.BufImgSurfaceData cannot be cast to sun.java2d.xr.XRSurfaceData
- E: java.lang.ClassCastException: sun.awt.image.BufImgSurfaceData cannot be cast to sun.java2d.xr.XRSurfaceData
- E: java.lang.ClassCastException: sun.awt.image.BufImgSurfaceData cannot be cast to sun.java2d.xr.XRSurfaceData
- E: java.lang.ClassCastException: sun.awt.image.BufImgSurfaceData cannot be cast to sun.java2d.xr.XRSurfaceData
- E: java.lang.ClassCastException: sun.awt.image.BufImgSurfaceData cannot be cast to sun.java2d.xr.XRSurfaceData

java.lang.ClassCastException: sun.awt.image.BufImgSurfaceData cannot be cast to sun.java2d.xr.XRSurfaceData
	at sun.java2d.xr.XRPMBlitLoops.cacheToTmpSurface(XRPMBlitLoops.java:145)
	at sun.java2d.xr.XrSwToPMBlit.Blit(XRPMBlitLoops.java:353)
	at sun.java2d.pipe.DrawImage.blitSurfaceData(DrawImage.java:967)
	at sun.java2d.pipe.DrawImage.renderImageCopy(DrawImage.java:585)
	at sun.java2d.pipe.DrawImage.copyImage(DrawImage.java:67)
	at sun.java2d.pipe.DrawImage.copyImage(DrawImage.java:1022)
	at sun.java2d.pipe.ValidatePipe.copyImage(ValidatePipe.java:186)
	at sun.java2d.SunGraphics2D.drawImage(SunGraphics2D.java:3318)
	at sun.java2d.SunGraphics2D.drawImage(SunGraphics2D.java:3296)
	at org.openstreetmap.josm.gui.MapView.paint(MapView.java:697)
	at javax.swing.JComponent.paintChildren(JComponent.java:887)
	at javax.swing.JComponent.paint(JComponent.java:1063)
	at javax.swing.JComponent.paintToOffscreen(JComponent.java:5222)
	at javax.swing.BufferStrategyPaintManager.paint(BufferStrategyPaintManager.java:290)
	at javax.swing.RepaintManager.paint(RepaintManager.java:1265)
	at javax.swing.JComponent._paintImmediately(JComponent.java:5170)
	at javax.swing.JComponent.paintImmediately(JComponent.java:4981)
	at javax.swing.RepaintManager$4.run(RepaintManager.java:824)
	at javax.swing.RepaintManager$4.run(RepaintManager.java:807)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:75)
	at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:807)
	at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:782)
	at javax.swing.RepaintManager.prePaintDirtyRegions(RepaintManager.java:731)
	at javax.swing.RepaintManager.access$1300(RepaintManager.java:64)
	at javax.swing.RepaintManager$ProcessingRunnable.run(RepaintManager.java:1720)
	at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)
	at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:749)
	at java.awt.EventQueue.access$500(EventQueue.java:97)
	at java.awt.EventQueue$3.run(EventQueue.java:702)
	at java.awt.EventQueue$3.run(EventQueue.java:696)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:75)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:719)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)

[anonymous]

Additional details: I had connected an external monitor to the laptop when waking up the computer from sleep. Later when I disconnected the external monitor and the desktop size changed back to laptop native screen size, the ui started rendering normally again.

[Don-vip]

Java bug. Can you please try with latest version? 8u45 is the current one.

[Don-vip]

It's ​javabug:7172749