save-as new file foo.osm failed

[vbroman@…]

Running on CEntOS 5.3 under KDE.
Installed new version of JOSM, downloaded from OSM a
small area, tried to download more neighboring area and
got several http 503 errors (note april 21 date),
then tried to save-as in a new directory as foo.osm,
and it failed showing the window that asks for a bug report.
The file system is not out of space and no file permission problems present.

Path: trunk
URL: ​http://josm.openstreetmap.de/svn/trunk
Repository Root: ​http://josm.openstreetmap.de/svn
Repository UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Revision: 1529
Node Kind: directory
Last Changed Author: framm
Last Changed Rev: 1529
Last Changed Date: 2009-04-16 19:26:54 +0200 (Thu, 16 Apr 2009)

Java version: 1.6.0_0
Plugins: AgPifoJ;PicLayer;editgpx;livegps;measurement;openvisible;routing;utilsplugin;validator;wmsplugin
Plugin AgPifoJ Version: 14290
Plugin PicLayer Version: 14428
Plugin editgpx Version: 14247
Plugin livegps Version: 14120
Plugin measurement Version: 14015
Plugin openvisible Version: 14233
Plugin routing Version: 14404
Plugin utilsplugin Version: 14356
Plugin validator Version: 14123
Plugin wmsplugin Version: 14120

java.lang.NullPointerException

at org.openstreetmap.josm.io.OsmWriter.writeDataSources(OsmWriter.java:86)
at org.openstreetmap.josm.actions.SaveActionBase.save(SaveActionBase.java:164)
at org.openstreetmap.josm.actions.SaveActionBase.save(SaveActionBase.java:145)
at org.openstreetmap.josm.actions.SaveActionBase.doSave(SaveActionBase.java:57)
at org.openstreetmap.josm.actions.SaveActionBase.actionPerformed(SaveActionBase.java:38)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2012)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2335)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:404)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)
at javax.swing.AbstractButton.doClick(AbstractButton.java:374)
at javax.swing.plaf.basic.BasicMenuItemUI.doClick(BasicMenuItemUI.java:1688)
at javax.swing.plaf.basic.BasicMenuItemUI$Handler.mouseReleased(BasicMenuItemUI.java:1732)
at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:289)
at java.awt.Component.processMouseEvent(Component.java:6108)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3276)
at java.awt.Component.processEvent(Component.java:5873)
at java.awt.Container.processEvent(Container.java:2105)
at java.awt.Component.dispatchEventImpl(Component.java:4469)
at java.awt.Container.dispatchEventImpl(Container.java:2163)
at java.awt.Component.dispatchEvent(Component.java:4295)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4461)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4125)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4055)
at java.awt.Container.dispatchEventImpl(Container.java:2149)
at java.awt.Window.dispatchEventImpl(Window.java:2478)
at java.awt.Component.dispatchEvent(Component.java:4295)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:604)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:275)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:200)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:190)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:185)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:177)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:138)

[vbroman@…]

I disabled most of the plugins, save only routing, utils, validator, wms,
restarted, got new data with no server trouble, did a save-as and
specified .osm file type and saved foo.osm, overwriting the old empty file
from the failure, and it succeeded.

[anonymous]

It hasn't happened again and the server and josm are getting updated
a bunch for the new 0.6 api. I'm assuming it just went away.