It is not possible to download new plugins

[arj@…]

I recently installed a fresh version of JOSM on a new computer.

The plugins list is empty. Even after pressing update, and being shown the dialog box that says that 1 site was contacted, there are no plugins.

I have tried removing my .josm and switching between the latest stable version and the nightly. Still no difference.

After that, I decided to work around the issue by copying the .josm directory from another computer. This made all the plugins display in the preferences, but when I tried to download additional plugins, an exception occurred.

I saved a copy of the broken .josm that can be inspected if necessary, but really, it should be sufficient to just download the latest JOSM on a fresh account to reproduce the bug.

Path: trunk
URL: ​http://josm.openstreetmap.de/svn/trunk
Repository Root: ​http://josm.openstreetmap.de/svn
Repository UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Revision: 1586
Node Kind: directory
Last Changed Author: stoecker
Last Changed Rev: 1586
Last Changed Date: 2009-05-11 17:33:36 +0200 (Mon, 11 May 2009)

Java version: 1.6.0_10
Plugins: lakewalker;validator;wmsplugin
Plugin lakewalker Version: 14015
Plugin validator Version: 14123
Plugin wmsplugin Version: 14120

java.lang.NullPointerException

at org.openstreetmap.josm.plugins.PluginDownloader.downloadPlugin(PluginDownloader.java:136)
at org.openstreetmap.josm.plugins.PluginSelection.finish(PluginSelection.java:114)
at org.openstreetmap.josm.gui.preferences.PluginPreference.ok(PluginPreference.java:116)
at org.openstreetmap.josm.gui.preferences.PreferenceDialog.ok(PreferenceDialog.java:93)
at org.openstreetmap.josm.actions.PreferencesAction.actionPerformed(PreferencesAction.java:75)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1995)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2318)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242)
at javax.swing.AbstractButton.doClick(AbstractButton.java:357)
at javax.swing.plaf.basic.BasicMenuItemUI.doClick(BasicMenuItemUI.java:1225)
at javax.swing.plaf.basic.BasicMenuItemUI$Handler.mouseReleased(BasicMenuItemUI.java:1266)
at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:272)
at java.awt.Component.processMouseEvent(Component.java:6134)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3265)
at java.awt.Component.processEvent(Component.java:5899)
at java.awt.Container.processEvent(Container.java:2023)
at java.awt.Component.dispatchEventImpl(Component.java:4501)
at java.awt.Container.dispatchEventImpl(Container.java:2081)
at java.awt.Component.dispatchEvent(Component.java:4331)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4301)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3965)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3895)
at java.awt.Container.dispatchEventImpl(Container.java:2067)
at java.awt.Window.dispatchEventImpl(Window.java:2458)
at java.awt.Component.dispatchEvent(Component.java:4331)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
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)

[Gubaer]

Closed as duplicate of #2530.