Exception at upload

[nakor]

I sometimes get this at upload. Uploading a second time works fine.

Repository Root: http://josm.openstreetmap.de/svn
Build-Date: 2010-09-19 01:31:21
Last Changed Author: stoecker
Revision: 3544
Repository UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
URL: http://josm.openstreetmap.de/svn/trunk
Last Changed Date: 2010-09-18 23:59:04 +0200 (Sat, 18 Sep 2010)
Last Changed Rev: 3544

Identification: JOSM/1.5 (3544 en)
Memory Usage: 446 MB / 2666 MB (211 MB allocated, but free)
Java version: 1.6.0_21, Sun Microsystems Inc., Java HotSpot(TM) 64-Bit Server VM
Operating system: Linux
Dataset consistency test: No problems found

Plugin: PicLayer (22549)
Plugin: download_along (22427)
Plugin: editgpx (22548)
Plugin: measurement (22547)
Plugin: michigan_left (22369)
Plugin: openstreetbugs (22723)
Plugin: openvisible (21706)
Plugin: remotecontrol (22734)
Plugin: reverter (22533)
Plugin: turnrestrictions (23254)
Plugin: undelete (22365)
Plugin: validator (22805)
Plugin: waydownloader (21706)
Plugin: wmsplugin (22008)

java.lang.reflect.InvocationTargetException

at java.awt.EventQueue.invokeAndWait(EventQueue.java:998)
at org.openstreetmap.josm.gui.PleaseWaitRunnable.doRealRun(PleaseWaitRunnable.java:88)
at org.openstreetmap.josm.gui.PleaseWaitRunnable.run(PleaseWaitRunnable.java:129)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:619)

Caused by: java.lang.NullPointerException

at java.util.Calendar.setTime(Calendar.java:1075)
at java.text.SimpleDateFormat.format(SimpleDateFormat.java:876)
at java.text.SimpleDateFormat.format(SimpleDateFormat.java:869)
at java.text.DateFormat.format(DateFormat.java:316)
at org.openstreetmap.josm.tools.ExceptionUtil.explainChangesetClosedException(ExceptionUtil.java:247)
at org.openstreetmap.josm.gui.ExceptionDialogUtil.explainChangesetClosedException(ExceptionDialogUtil.java:58)
at org.openstreetmap.josm.gui.ExceptionDialogUtil.explainOsmTransferException(ExceptionDialogUtil.java:403)
at org.openstreetmap.josm.gui.ExceptionDialogUtil.explainException(ExceptionDialogUtil.java:478)
at org.openstreetmap.josm.gui.io.AbstractUploadTask.handleFailedUpload(AbstractUploadTask.java:353)
at org.openstreetmap.josm.gui.io.UploadPrimitivesTask$2.run(UploadPrimitivesTask.java:322)
at org.openstreetmap.josm.gui.io.UploadPrimitivesTask.finish(UploadPrimitivesTask.java:351)
at org.openstreetmap.josm.gui.PleaseWaitRunnable$1.run(PleaseWaitRunnable.java:90)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:199)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:597)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:178)
at java.awt.Dialog$1.run(Dialog.java:1046)
at java.awt.Dialog$3.run(Dialog.java:1098)
at java.security.AccessController.doPrivileged(Native Method)
at java.awt.Dialog.show(Dialog.java:1096)
at java.awt.Component.show(Component.java:1563)
at java.awt.Component.setVisible(Component.java:1515)
at java.awt.Window.setVisible(Window.java:842)
at java.awt.Dialog.setVisible(Dialog.java:986)
at org.openstreetmap.josm.gui.progress.PleaseWaitProgressMonitor$3.run(PleaseWaitProgressMonitor.java:83)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:597)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)

[bastiK]

Closed as duplicate of #5417.