Plugins from different paths are mixed

[SammysHP]

What steps will reproduce the problem?

1. Install reltoolbox or utilsplugin2
2. Update JOSM to latest version (but I noticed this with different versions during the last few weeks)
3. Start JOSM

What is the expected result?

JOSM starts with all plugins enabled.

What happens instead?

reltoolbox and utilsplugin2 are not loaded and an error message is shown.

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

URL:http://josm.openstreetmap.de/svn/trunk
Repository:UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Last:Changed Date: 2017-09-01 23:55:45 +0200 (Fri, 01 Sep 2017)
Build-Date:2017-09-01 21:58:49
Revision:12711
Relative:URL: ^/trunk

Identification: JOSM/1.5 (12711 en) Linux Arch Linux
Memory Usage: 617 MB / 1365 MB (402 MB allocated, but free)
Java version: 1.8.0_144-b01, Oracle Corporation, Java HotSpot(TM) 64-Bit Server VM
Screen: :0.0 1920x1200, :0.1 1920x1200
Maximum Screen Size: 1920x1200
VM arguments: [-Djosm.restart=true, -Dawt.useSystemAAFontSettings=on, -Dswing.aatext=true, -Dswing.defaultlaf=com.sun.java.swing.plaf.gtk.GTKLookAndFeel]

Plugins:
+ DirectUpload (32699)
+ OpeningHoursEditor (32699)
+ PicLayer (32796)
+ buildings_tools (32944)
+ continuosDownload (53)
+ contourmerge (1030)
+ measurement (32936)
+ print (32965)
+ reltoolbox
+ reverter (32796)
+ tageditor (33021)
+ terracer (33031)
+ utilsplugin2

Map paint styles:
- https://josm.openstreetmap.de/josmfile?page=Styles/Lane_and_Road_Attributes&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/Lane_features&style&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/Lane_features_ryg&style&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/Modified&style&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/LessObtrusiveNodes&style&zip=1
- https://github.com/simon04/coloured-addresses.mapcss/raw/master/dist/coloured-addresses.mapcss
- https://josm.openstreetmap.de/josmfile?page=Styles/Coloured_Streets&style&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/LitObjects&zip=1
- https://github.com/bastik/mapcss-tools/raw/osm/mapnik2mapcss/osm-results/mapnik.zip

Last errors/warnings:
- E: org.openstreetmap.josm.plugins.PluginListParseException: Failed to create plugin information from manifest for plugin 'mbtiles.jar'. Cause: org.openstreetmap.josm.plugins.PluginException: An error occurred in plugin mbtiles. Cause: java.io.IOException: invalid manifest format
- E: org.openstreetmap.josm.plugins.PluginException: An error occurred in plugin reltoolbox. Cause: java.lang.NoClassDefFoundError: org/openstreetmap/josm/gui/NameFormatterHook. Cause: java.lang.ClassNotFoundException: org.openstreetmap.josm.gui.NameFormatterHook
- W: Disable plugin - Could not load plugin reltoolbox. Delete from preferences?
- E: org.openstreetmap.josm.plugins.PluginException: An error occurred in plugin utilsplugin2. Cause: java.lang.NoClassDefFoundError: org/openstreetmap/josm/actions/search/SearchCompiler$MatchFactory. Cause: java.lang.ClassNotFoundException: org.openstreetmap.josm.actions.search.SearchCompiler$MatchFactory
- W: Disable plugin - Could not load plugin utilsplugin2. Delete from preferences?

Some more logs:

2017-09-02 12:05:36.173 SEVERE: org.openstreetmap.josm.plugins.PluginListParseException: Failed to create plugin information from manifest for plugin 'mbtiles.jar'. Cause: org.openstreetmap.josm.plugins.PluginException: An error occurred in plugin mbtiles. Cause: java.io.IOException: invalid manifest format
org.openstreetmap.josm.plugins.PluginListParseException: Failed to create plugin information from manifest for plugin 'mbtiles.jar'
	at org.openstreetmap.josm.plugins.PluginListParser.createInfo(PluginListParser.java:44)
	at org.openstreetmap.josm.plugins.PluginListParser.addPluginInformation(PluginListParser.java:96)
	at org.openstreetmap.josm.plugins.PluginListParser.parse(PluginListParser.java:77)
	at org.openstreetmap.josm.plugins.ReadLocalPluginInformationTask.processLocalPluginInformationFile(ReadLocalPluginInformationTask.java:148)
	at org.openstreetmap.josm.plugins.ReadLocalPluginInformationTask.scanSiteCacheFiles(ReadLocalPluginInformationTask.java:96)
	at org.openstreetmap.josm.plugins.ReadLocalPluginInformationTask.scanLocalPluginRepository(ReadLocalPluginInformationTask.java:138)
	at org.openstreetmap.josm.plugins.ReadLocalPluginInformationTask.realRun(ReadLocalPluginInformationTask.java:188)
	at org.openstreetmap.josm.gui.PleaseWaitRunnable.doRealRun(PleaseWaitRunnable.java:95)
	at org.openstreetmap.josm.gui.PleaseWaitRunnable.run(PleaseWaitRunnable.java:143)
	at org.openstreetmap.josm.plugins.PluginHandler.loadLocallyAvailablePluginInformation(PluginHandler.java:921)
	at org.openstreetmap.josm.plugins.PluginHandler.buildListOfPluginsToLoad(PluginHandler.java:983)
	at org.openstreetmap.josm.gui.MainApplication.updateAndLoadEarlyPlugins(MainApplication.java:958)
	at org.openstreetmap.josm.gui.MainApplication.main(MainApplication.java:834)
Caused by: org.openstreetmap.josm.plugins.PluginException: An error occurred in plugin mbtiles
	at org.openstreetmap.josm.plugins.PluginInformation.<init>(PluginInformation.java:148)
	at org.openstreetmap.josm.plugins.PluginListParser.createInfo(PluginListParser.java:40)
	... 12 more
Caused by: java.io.IOException: invalid manifest format
	at java.util.jar.Manifest.read(Manifest.java:225)
	at org.openstreetmap.josm.plugins.PluginInformation.<init>(PluginInformation.java:142)
	... 13 more

...

2017-09-02 12:05:40.734 SEVERE: org.openstreetmap.josm.plugins.PluginException: An error occurred in plugin reltoolbox. Cause: java.lang.NoClassDefFoundError: org/openstreetmap/josm/gui/NameFormatterHook. Cause: java.lang.ClassNotFoundException: org.openstreetmap.josm.gui.NameFormatterHook
org.openstreetmap.josm.plugins.PluginException: An error occurred in plugin reltoolbox
	at org.openstreetmap.josm.plugins.PluginInformation.loadClass(PluginInformation.java:347)
	at org.openstreetmap.josm.plugins.PluginHandler.loadPlugin(PluginHandler.java:778)
	at org.openstreetmap.josm.plugins.PluginHandler.loadPlugins(PluginHandler.java:864)
	at org.openstreetmap.josm.plugins.PluginHandler.loadLatePlugins(PluginHandler.java:903)
	at org.openstreetmap.josm.gui.MainApplication.loadLatePlugins(MainApplication.java:974)
	at org.openstreetmap.josm.gui.MainApplication.main(MainApplication.java:850)
Caused by: java.lang.NoClassDefFoundError: org/openstreetmap/josm/gui/NameFormatterHook
	at java.lang.Class.forName0(Native Method)
	at java.lang.Class.forName(Class.java:348)
	at org.openstreetmap.josm.plugins.PluginInformation.loadClass(PluginInformation.java:345)
	... 5 more
Caused by: java.lang.ClassNotFoundException: org.openstreetmap.josm.gui.NameFormatterHook
	at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
	at org.openstreetmap.josm.plugins.PluginClassLoader.loadClass(PluginClassLoader.java:59)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
	... 8 more

...

2017-09-02 12:05:42.573 SEVERE: org.openstreetmap.josm.plugins.PluginException: An error occurred in plugin utilsplugin2. Cause: java.lang.NoClassDefFoundError: org/openstreetmap/josm/actions/search/SearchCompiler$MatchFactory. Cause: java.lang.ClassNotFoundException: org.openstreetmap.josm.actions.search.SearchCompiler$MatchFactory
org.openstreetmap.josm.plugins.PluginException: An error occurred in plugin utilsplugin2
	at org.openstreetmap.josm.plugins.PluginInformation.loadClass(PluginInformation.java:347)
	at org.openstreetmap.josm.plugins.PluginHandler.loadPlugin(PluginHandler.java:778)
	at org.openstreetmap.josm.plugins.PluginHandler.loadPlugins(PluginHandler.java:864)
	at org.openstreetmap.josm.plugins.PluginHandler.loadLatePlugins(PluginHandler.java:903)
	at org.openstreetmap.josm.gui.MainApplication.loadLatePlugins(MainApplication.java:974)
	at org.openstreetmap.josm.gui.MainApplication.main(MainApplication.java:850)
Caused by: java.lang.NoClassDefFoundError: org/openstreetmap/josm/actions/search/SearchCompiler$MatchFactory
	at java.lang.Class.forName0(Native Method)
	at java.lang.Class.forName(Class.java:348)
	at org.openstreetmap.josm.plugins.PluginInformation.loadClass(PluginInformation.java:345)
	... 5 more
Caused by: java.lang.ClassNotFoundException: org.openstreetmap.josm.actions.search.SearchCompiler$MatchFactory
	at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
	at org.openstreetmap.josm.plugins.PluginClassLoader.loadClass(PluginClassLoader.java:59)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
	... 8 more

Version of plugins reported by manual update from plugin list in preferences:

reltoolbox (33530)
utilsplugin2 (33579)

[Don-vip]

Please try again. Either your plugins were not uploaded before, or the jars are corrupted in your local plugins directory. These two plugins work fine.

[SammysHP]

Looks like I found the reason for this problem: My JOSM profile located in ~/.config/JOSM contained a "plugins" directory with old versions from 2016. Now these files are stored in ~/.local/share/JOSM and somehow got mixed up. I deleted the directory in ~/.config/JOSM, updated the plugins (it complained about something that I don't remember anymore), restarted JOSM and everything works.

[Don-vip]

We switched a long time ago, and you're the first one to report this problem.
Whoever susceptible to face the problem again has the workaround: delete ~/.config/JOSM directory.