Keep getting error when trying to download new data.

[surajth64@…]

What steps will reproduce the problem?

What is the expected result?

What happens instead?

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

Relative:URL: ^/trunk
Repository:UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Last:Changed Date: 2025-08-31 14:19:57 +0200 (Sun, 31 Aug 2025)
Revision:19439
Build-Date:2025-09-02 01:30:58
URL:https://josm.openstreetmap.de/svn/trunk

Identification: JOSM/1.5 (19439 en) Linux Arch Linux
Memory Usage: 392 MB / 8184 MB (189 MB allocated, but free)
Java version: 25.0.1, Arch Linux, OpenJDK 64-Bit Server VM
Look and Feel: javax.swing.plaf.metal.MetalLookAndFeel
Screen: :0.0 1366x768x[Multi depth]@60Hz (scaling 1.00×1.00) :0.1 1920x1080x[Multi depth]@[Unknown refresh rate] (scaling 1.00×1.00)
Maximum Screen Size: 1920×1080
Best cursor sizes: 16×16→16×16, 32×32→32×32
Environment variable LANG: en_IN.UTF-8
System property file.encoding: UTF-8
System property sun.jnu.encoding: UTF-8
Locale info: en_IN
Numbers with default locale: 1234567890 -> 1234567890
Desktop environment: GNOME
VM arguments: [--add-modules=java.scripting,java.sql, -Djosm.restart=true, -Djava.net.useSystemProxies=true, -XX:MaxRAMPercentage=75.0, --add-exports=java.base/sun.security.action=ALL-UNNAMED, --add-exports=java.desktop/com.sun.imageio.plugins.jpeg=ALL-UNNAMED, --add-exports=java.desktop/com.sun.imageio.spi=ALL-UNNAMED]
Dataset consistency test: No problems found

Plugins:
+ CADTools (23)
+ ElevationProfile (36438)
+ FastDraw (36438)
+ Mapillary (1813)
+ RelationDissolve (0.2.0)
+ apache-commons (36438)
+ buildings_tools (36438)
+ contourmerge (v0.2.2)
+ ejml (36438)
+ geotools (36438)
+ imagery_offset_db (36438)
+ jackson (36438)
+ jaxb (36438)
+ jts (36438)
+ mapathoner (v1.7.1)
+ markseen (176)
+ opendata (36460)
+ pbf (36438)
+ pmtiles (36438)
+ reltoolbox (36438)
+ splinex (36438)
+ utilsplugin2 (36438)

Map paint styles:
+ https://josm.openstreetmap.de/josmfile?page=Styles/MapWithAI&zip=1

Last errors/warnings:
- 00091.224 E: Handled by bug report queue: java.lang.NoClassDefFoundError: sun/security/action/GetPropertyAction. Cause: java.lang.ClassNotFoundException: sun.security.action.GetPropertyAction



=== REPORTED CRASH DATA ===
BugReportExceptionHandler#handleException:
No data collected.

Warning issued by: BugReportExceptionHandler#handleException

=== STACK TRACE ===
Thread: AWT-EventQueue-0 (37) of main
java.lang.NoClassDefFoundError: sun/security/action/GetPropertyAction
	at com.sun.media.imageioimpl.plugins.pnm.PNMImageWriter.<clinit>(PNMImageWriter.java:111)
	at com.sun.media.imageioimpl.plugins.pnm.PNMImageWriterSpi.createWriterInstance(PNMImageWriterSpi.java:117)
	at java.desktop/javax.imageio.spi.ImageWriterSpi.createWriterInstance(ImageWriterSpi.java:351)
	at java.desktop/javax.imageio.ImageIO$ImageWriterIterator.next(ImageIO.java:805)
	at java.desktop/javax.imageio.ImageIO$ImageWriterIterator.next(ImageIO.java:789)
	at java.desktop/sun.awt.X11.XDataTransferer.getPlatformMappingsForFlavor(XDataTransferer.java:413)
	at java.desktop/sun.awt.datatransfer.DesktopDatatransferServiceImpl.getPlatformMappingsForFlavor(DesktopDatatransferServiceImpl.java:87)
	at java.datatransfer/java.awt.datatransfer.SystemFlavorMap.flavorToNativeLookup(SystemFlavorMap.java:439)
	at java.datatransfer/java.awt.datatransfer.SystemFlavorMap.getNativesForFlavor(SystemFlavorMap.java:553)
	at java.desktop/sun.awt.datatransfer.DataTransferer.getFlavorsForFormats(DataTransferer.java:453)
	at java.desktop/sun.awt.datatransfer.ClipboardTransferable.<init>(ClipboardTransferable.java:88)
	at java.desktop/sun.awt.X11.XClipboard.getContents(XClipboard.java:109)
	at org.openstreetmap.josm.gui.datatransfer.ClipboardUtils.getClipboardContent(ClipboardUtils.java:107)
	at org.openstreetmap.josm.gui.datatransfer.ClipboardUtils.getClipboardContent(ClipboardUtils.java:95)
	at org.openstreetmap.josm.gui.datatransfer.ClipboardUtils.getClipboardStringContent(ClipboardUtils.java:80)
	at org.openstreetmap.josm.gui.widgets.AbstractIdTextField.tryToPasteFromClipboard(AbstractIdTextField.java:75)
	at org.openstreetmap.josm.gui.dialogs.changeset.SingleChangesetDownloadPanel.build(SingleChangesetDownloadPanel.java:64)
	at org.openstreetmap.josm.gui.dialogs.changeset.SingleChangesetDownloadPanel.<init>(SingleChangesetDownloadPanel.java:40)
	at org.openstreetmap.josm.gui.dialogs.changeset.ChangesetCacheManager.buildToolbarPanel(ChangesetCacheManager.java:143)
	at org.openstreetmap.josm.gui.dialogs.changeset.ChangesetCacheManager.build(ChangesetCacheManager.java:315)
	at org.openstreetmap.josm.gui.dialogs.changeset.ChangesetCacheManager.<init>(ChangesetCacheManager.java:333)
	at org.openstreetmap.josm.gui.dialogs.changeset.ChangesetCacheManager.getInstance(ChangesetCacheManager.java:93)
	at org.openstreetmap.josm.gui.download.BookmarkList.load(BookmarkList.java:289)
	at org.openstreetmap.josm.gui.download.BookmarkList.<init>(BookmarkList.java:245)
	at org.openstreetmap.josm.gui.download.BookmarkSelection.addGui(BookmarkSelection.java:117)
	at org.openstreetmap.josm.gui.download.DownloadDialog.buildMainPanel(DownloadDialog.java:162)
	at org.openstreetmap.josm.gui.download.DownloadDialog.<init>(DownloadDialog.java:263)
	at org.openstreetmap.josm.gui.download.DownloadDialog.<init>(DownloadDialog.java:251)
	at org.openstreetmap.josm.gui.download.DownloadDialog.getInstance(DownloadDialog.java:92)
	at org.openstreetmap.josm.actions.DownloadAction.actionPerformed(DownloadAction.java:40)
	at java.desktop/javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1972)
	at java.desktop/javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2314)
	at java.desktop/javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:407)
	at java.desktop/javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:262)
	at java.desktop/javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:279)
	at java.desktop/java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:299)
	at java.desktop/java.awt.Component.processMouseEvent(Component.java:6576)
	at java.desktop/javax.swing.JComponent.processMouseEvent(JComponent.java:3404)
	at java.desktop/java.awt.Component.processEvent(Component.java:6341)
	at java.desktop/java.awt.Container.processEvent(Container.java:2260)
	at java.desktop/java.awt.Component.dispatchEventImpl(Component.java:4958)
	at java.desktop/java.awt.Container.dispatchEventImpl(Container.java:2318)
	at java.desktop/java.awt.Component.dispatchEvent(Component.java:4790)
	at java.desktop/java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4917)
	at java.desktop/java.awt.LightweightDispatcher.processMouseEvent(Container.java:4560)
	at java.desktop/java.awt.LightweightDispatcher.dispatchEvent(Container.java:4501)
	at java.desktop/java.awt.Container.dispatchEventImpl(Container.java:2304)
	at java.desktop/java.awt.Window.dispatchEventImpl(Window.java:2671)
	at java.desktop/java.awt.Component.dispatchEvent(Component.java:4790)
	at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:725)
	at java.desktop/java.awt.EventQueue.dispatchEvent(EventQueue.java:702)
	at java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:203)
	at java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:124)
	at java.desktop/java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:113)
	at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:109)
	at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
	at java.desktop/java.awt.EventDispatchThread.run(EventDispatchThread.java:90)
Caused by: java.lang.ClassNotFoundException: sun.security.action.GetPropertyAction
	at org.openstreetmap.josm.plugins.PluginClassLoader.loadClass(PluginClassLoader.java:82)
	at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:490)
	... 57 more

[GerdP]

Seems you used copy&paste before and the content of the clipboard is causing this.
Workaround: Copy a harmless string like "a".

[quak]

Ticket #24570 has been marked as a duplicate of this ticket.