Conflation Plugin not Working

[anonymous]

What steps will reproduce the problem?

1. Opening up JOSM and downloading a data layer will cause the error/warning to occur.

What is the expected result?

The conflation plugin icon should appear in the edit toolbar (it does not) and the plugin should able to be used.

What happens instead?

I am requested to update the conflation plugin to the latest version and then I am requested to restart JOSM in an endless cycle. If I choose to "keep plugin" then the following error occurs and I cannot use the conflation plugin.

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

URL:https://josm.openstreetmap.de/svn/trunk
Repository:UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Last:Changed Date: 2021-09-03 03:12:33 +0200 (Fri, 03 Sep 2021)
Build-Date:2021-09-03 01:31:19
Revision:18193
Relative:URL: ^/trunk

Identification: JOSM/1.5 (18193 en) Windows 10 64-Bit
OS Build number: Windows 10 Home 2009 (19042)
Memory Usage: 247 MB / 989 MB (123 MB allocated, but free)
Java version: 1.8.0_291-b10, Oracle Corporation, Java HotSpot(TM) Client VM
Look and Feel: com.sun.java.swing.plaf.windows.WindowsLookAndFeel
Screen: \Display0 1920×1080 (scaling 1.00×1.00)
Maximum Screen Size: 1920×1080
Best cursor sizes: 16×16→32×32, 32×32→32×32
System property file.encoding: Cp1252
System property sun.jnu.encoding: Cp1252
Locale info: en_US
Numbers with default locale: 1234567890 -> 1234567890
Dataset consistency test: No problems found

Plugins:
+ FastDraw (35640)
+ Lanes (${version.entry.commit.revision})
+ apache-commons (35524)
+ apache-http (35589)
+ buildings_tools (35823)
+ conflation (0.6.0)
+ ejml (35458)
+ geotools (35458)
+ jaxb (35543)
+ jna (35662)
+ jts (35458)
+ mapwithai-dev (1.8.3-17-g31cd0d2)
+ opendata (35803)
+ terracer (35640)
+ utilsplugin2 (35792)

Tagging presets:
+ https://josm.openstreetmap.de/josmfile?page=Presets/BuildingPreset&zip=1

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

Last errors/warnings:
- 00005.843 W: Unable to request certificate of https://grca.nat.gov.tw
- 00013.997 W: Not a single layer for the name 'ACC 2018 Ortho: 2018_Ortho_Imagery': []
- 00019.726 E: Failed to locate image 'MapWithAI'
- 00028.888 E: Handled by bug report queue: org.openstreetmap.josm.plugins.PluginException: An error occurred in plugin conflation. Cause: java.lang.reflect.InvocationTargetException. Cause: java.lang.NoClassDefFoundError: org/openstreetmap/josm/Main. Cause: java.lang.ClassNotFoundException: org.openstreetmap.josm.Main



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

Warning issued by: BugReportExceptionHandler#handleException

=== STACK TRACE ===
Thread: AWT-EventQueue-0 (17) of main
org.openstreetmap.josm.plugins.PluginException: An error occurred in plugin conflation
	at org.openstreetmap.josm.plugins.PluginProxy.handlePluginException(PluginProxy.java:60)
	at org.openstreetmap.josm.plugins.PluginProxy.mapFrameInitialized(PluginProxy.java:71)
	at org.openstreetmap.josm.gui.MainPanel.updateContent(MainPanel.java:80)
	at org.openstreetmap.josm.gui.MainPanel$1.beforeFirstLayerAdded(MainPanel.java:157)
	at org.openstreetmap.josm.gui.layer.MainLayerManager.realAddLayer(MainLayerManager.java:281)
	at org.openstreetmap.josm.gui.layer.LayerManager.lambda$addLayer$0(LayerManager.java:218)
	at org.openstreetmap.josm.gui.util.GuiHelper.runInEDTAndWaitWithException(GuiHelper.java:246)
	at org.openstreetmap.josm.gui.layer.LayerManager.addLayer(LayerManager.java:218)
	at org.openstreetmap.josm.actions.downloadtasks.DownloadOsmTask$AbstractInternalTask.addNewLayerIfRequired(DownloadOsmTask.java:363)
	at org.openstreetmap.josm.actions.downloadtasks.DownloadOsmTask$AbstractInternalTask.loadData(DownloadOsmTask.java:370)
	at org.openstreetmap.josm.actions.downloadtasks.DownloadOsmTask$DownloadTask.finish(DownloadOsmTask.java:517)
	at java.awt.event.InvocationEvent.dispatch(Unknown Source)
	at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
	at java.awt.EventQueue.access$500(Unknown Source)
	at java.awt.EventQueue$3.run(Unknown Source)
	at java.awt.EventQueue$3.run(Unknown Source)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source)
	at java.awt.EventQueue.dispatchEvent(Unknown Source)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
	at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
	at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
	at java.awt.WaitDispatchSupport$2.run(Unknown Source)
	at java.awt.WaitDispatchSupport$4.run(Unknown Source)
	at java.awt.WaitDispatchSupport$4.run(Unknown Source)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.awt.WaitDispatchSupport.enter(Unknown Source)
	at java.awt.Dialog.show(Unknown Source)
	at java.awt.Component.show(Unknown Source)
	at java.awt.Component.setVisible(Unknown Source)
	at java.awt.Window.setVisible(Unknown Source)
	at java.awt.Dialog.setVisible(Unknown Source)
	at org.openstreetmap.josm.gui.progress.swing.PleaseWaitProgressMonitor.lambda$doBeginTask$3(PleaseWaitProgressMonitor.java:255)
	at org.openstreetmap.josm.gui.progress.swing.PleaseWaitProgressMonitor.lambda$doInEDT$0(PleaseWaitProgressMonitor.java:113)
	at java.awt.event.InvocationEvent.dispatch(Unknown Source)
	at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
	at java.awt.EventQueue.access$500(Unknown Source)
	at java.awt.EventQueue$3.run(Unknown Source)
	at java.awt.EventQueue$3.run(Unknown Source)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source)
	at java.awt.EventQueue.dispatchEvent(Unknown Source)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
	at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
	at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
	at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
	at java.awt.EventDispatchThread.run(Unknown Source)
Caused by: java.lang.reflect.InvocationTargetException
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at org.openstreetmap.josm.plugins.PluginProxy.mapFrameInitialized(PluginProxy.java:66)
	... 46 more
Caused by: java.lang.NoClassDefFoundError: org/openstreetmap/josm/Main
	at org.openstreetmap.josm.plugins.conflation.ConflationPlugin.mapFrameInitialized(ConflationPlugin.java:23)
	... 51 more
Caused by: java.lang.ClassNotFoundException: org.openstreetmap.josm.Main
	at org.openstreetmap.josm.plugins.PluginClassLoader.loadClass(PluginClassLoader.java:92)
	at java.lang.ClassLoader.loadClass(Unknown Source)
	... 52 more

=== RUNNING THREADS ===
Thread: Java2D Disposer (10) of system
java.lang.Object.wait(Native Method)
java.lang.ref.ReferenceQueue.remove(Unknown Source)
java.lang.ref.ReferenceQueue.remove(Unknown Source)
sun.java2d.Disposer.run(Unknown Source)
java.lang.Thread.run(Unknown Source)

Thread: Timer-2 (82) of main
java.lang.Object.wait(Native Method)
java.lang.Object.wait(Unknown Source)
java.util.TimerThread.mainLoop(Unknown Source)
java.util.TimerThread.run(Unknown Source)

Thread: TMS-downloader-11 (74) of main
sun.misc.Unsafe.park(Native Method)
java.util.concurrent.locks.LockSupport.park(Unknown Source)
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(Unknown Source)
java.util.concurrent.LinkedBlockingDeque.takeFirst(Unknown Source)
org.openstreetmap.josm.data.cache.HostLimitQueue.take(HostLimitQueue.java:107)
org.openstreetmap.josm.data.cache.HostLimitQueue.take(HostLimitQueue.java:28)
java.util.concurrent.ThreadPoolExecutor.getTask(Unknown Source)
java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
java.lang.Thread.run(Unknown Source)

Thread: TMS-downloader-2 (65) of main
sun.misc.Unsafe.park(Native Method)
java.util.concurrent.locks.LockSupport.park(Unknown Source)
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(Unknown Source)
java.util.concurrent.LinkedBlockingDeque.takeFirst(Unknown Source)
org.openstreetmap.josm.data.cache.HostLimitQueue.take(HostLimitQueue.java:107)
org.openstreetmap.josm.data.cache.HostLimitQueue.take(HostLimitQueue.java:28)
java.util.concurrent.ThreadPoolExecutor.getTask(Unknown Source)
java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
java.lang.Thread.run(Unknown Source)

Thread: AWT-EventQueue-0 (17) of main
Stacktrace see above.

Thread: WeakCollectionCleaner (49) of main
java.lang.Object.wait(Native Method)
java.lang.ref.ReferenceQueue.remove(Unknown Source)
java.lang.ref.ReferenceQueue.remove(Unknown Source)
org.geotools.util.WeakCollectionCleaner.run(WeakCollectionCleaner.java:65)

Thread: TMS-downloader-1 (64) of main
sun.misc.Unsafe.park(Native Method)
java.util.concurrent.locks.LockSupport.park(Unknown Source)
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(Unknown Source)
java.util.concurrent.LinkedBlockingDeque.takeFirst(Unknown Source)
org.openstreetmap.josm.data.cache.HostLimitQueue.take(HostLimitQueue.java:107)
org.openstreetmap.josm.data.cache.HostLimitQueue.take(HostLimitQueue.java:28)
java.util.concurrent.ThreadPoolExecutor.getTask(Unknown Source)
java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
java.lang.Thread.run(Unknown Source)

Thread: changeset-updater-0 (59) of main
sun.misc.Unsafe.park(Native Method)
java.util.concurrent.locks.LockSupport.parkNanos(Unknown Source)
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(Unknown Source)
java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(Unknown Source)
java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(Unknown Source)
java.util.concurrent.ThreadPoolExecutor.getTask(Unknown Source)
java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
java.lang.Thread.run(Unknown Source)

Thread: TMS-downloader-12 (75) of main
sun.misc.Unsafe.park(Native Method)
java.util.concurrent.locks.LockSupport.park(Unknown Source)
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(Unknown Source)
java.util.concurrent.LinkedBlockingDeque.takeFirst(Unknown Source)
org.openstreetmap.josm.data.cache.HostLimitQueue.take(HostLimitQueue.java:107)
org.openstreetmap.josm.data.cache.HostLimitQueue.take(HostLimitQueue.java:28)
java.util.concurrent.ThreadPoolExecutor.getTask(Unknown Source)
java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
java.lang.Thread.run(Unknown Source)

Thread: JCS-ElementEventQueue-Thread-7 (47) of main
sun.misc.Unsafe.park(Native Method)
java.util.concurrent.locks.LockSupport.park(Unknown Source)
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(Unknown Source)
java.util.concurrent.LinkedBlockingQueue.take(Unknown Source)
java.util.concurrent.ThreadPoolExecutor.getTask(Unknown Source)
java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
java.lang.Thread.run(Unknown Source)

Thread: Finalizer (3) of system
java.lang.Object.wait(Native Method)
java.lang.ref.ReferenceQueue.remove(Unknown Source)
java.lang.ref.ReferenceQueue.remove(Unknown Source)
java.lang.ref.Finalizer$FinalizerThread.run(Unknown Source)

Thread: ForkJoinPool.commonPool-worker-1 (50) of main
sun.misc.Unsafe.park(Native Method)
java.util.concurrent.ForkJoinPool.awaitWork(Unknown Source)
java.util.concurrent.ForkJoinPool.runWorker(Unknown Source)
java.util.concurrent.ForkJoinWorkerThread.run(Unknown Source)

Thread: AWT-Windows (12) of system
sun.awt.windows.WToolkit.eventLoop(Native Method)
sun.awt.windows.WToolkit.run(Unknown Source)
java.lang.Thread.run(Unknown Source)

Thread: TMS-downloader-0 (63) of main
sun.misc.Unsafe.park(Native Method)
java.util.concurrent.locks.LockSupport.park(Unknown Source)
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(Unknown Source)
java.util.concurrent.LinkedBlockingDeque.takeFirst(Unknown Source)
org.openstreetmap.josm.data.cache.HostLimitQueue.take(HostLimitQueue.java:107)
org.openstreetmap.josm.data.cache.HostLimitQueue.take(HostLimitQueue.java:28)
java.util.concurrent.ThreadPoolExecutor.getTask(Unknown Source)
java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
java.lang.Thread.run(Unknown Source)

Thread: ForkJoinPool.commonPool-worker-5 (26)
sun.misc.Unsafe.park(Native Method)
java.util.concurrent.ForkJoinPool.awaitWork(Unknown Source)
java.util.concurrent.ForkJoinPool.runWorker(Unknown Source)
java.util.concurrent.ForkJoinWorkerThread.run(Unknown Source)

Thread: ForkJoinPool.commonPool-worker-0 (81)
sun.misc.Unsafe.park(Native Method)
java.util.concurrent.ForkJoinPool.awaitWork(Unknown Source)
java.util.concurrent.ForkJoinPool.runWorker(Unknown Source)
java.util.concurrent.ForkJoinWorkerThread.run(Unknown Source)

Thread: Weak reference cleaner (34) of main
java.lang.Object.wait(Native Method)
java.lang.ref.ReferenceQueue.remove(Unknown Source)
java.lang.ref.ReferenceQueue.remove(Unknown Source)
org.openstreetmap.josm.tools.ListenableWeakReference.clean(ListenableWeakReference.java:60)
org.openstreetmap.josm.tools.ListenableWeakReference$$Lambda$235/12572685.run(Unknown Source)
java.lang.Thread.run(Unknown Source)

Thread: DestroyJavaVM (60) of main

Thread: Timer-0 (54) of main
java.lang.Object.wait(Native Method)
java.lang.Object.wait(Unknown Source)
java.util.TimerThread.mainLoop(Unknown Source)
java.util.TimerThread.run(Unknown Source)

Thread: TMS-downloader-16 (79) of main
sun.misc.Unsafe.park(Native Method)
java.util.concurrent.locks.LockSupport.park(Unknown Source)
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(Unknown Source)
java.util.concurrent.LinkedBlockingDeque.takeFirst(Unknown Source)
org.openstreetmap.josm.data.cache.HostLimitQueue.take(HostLimitQueue.java:107)
org.openstreetmap.josm.data.cache.HostLimitQueue.take(HostLimitQueue.java:28)
java.util.concurrent.ThreadPoolExecutor.getTask(Unknown Source)
java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
java.lang.Thread.run(Unknown Source)

Thread: Reference Handler (2) of system
java.lang.Object.wait(Native Method)
java.lang.Object.wait(Unknown Source)
java.lang.ref.Reference.tryHandlePending(Unknown Source)
java.lang.ref.Reference$ReferenceHandler.run(Unknown Source)

Thread: Attach Listener (5) of system

Thread: TMS-downloader-15 (78) of main
sun.misc.Unsafe.park(Native Method)
java.util.concurrent.locks.LockSupport.park(Unknown Source)
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(Unknown Source)
java.util.concurrent.LinkedBlockingDeque.takeFirst(Unknown Source)
org.openstreetmap.josm.data.cache.HostLimitQueue.take(HostLimitQueue.java:107)
org.openstreetmap.josm.data.cache.HostLimitQueue.take(HostLimitQueue.java:28)
java.util.concurrent.ThreadPoolExecutor.getTask(Unknown Source)
java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
java.lang.Thread.run(Unknown Source)

Thread: TMS-downloader-7 (70) of main
sun.misc.Unsafe.park(Native Method)
java.util.concurrent.locks.LockSupport.park(Unknown Source)
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(Unknown Source)
java.util.concurrent.LinkedBlockingDeque.takeFirst(Unknown Source)
org.openstreetmap.josm.data.cache.HostLimitQueue.take(HostLimitQueue.java:107)
org.openstreetmap.josm.data.cache.HostLimitQueue.take(HostLimitQueue.java:28)
java.util.concurrent.ThreadPoolExecutor.getTask(Unknown Source)
java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
java.lang.Thread.run(Unknown Source)

Thread: TMS-downloader-5 (68) of main
sun.misc.Unsafe.park(Native Method)
java.util.concurrent.locks.LockSupport.park(Unknown Source)
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(Unknown Source)
java.util.concurrent.LinkedBlockingDeque.takeFirst(Unknown Source)
org.openstreetmap.josm.data.cache.HostLimitQueue.take(HostLimitQueue.java:107)
org.openstreetmap.josm.data.cache.HostLimitQueue.take(HostLimitQueue.java:28)
java.util.concurrent.ThreadPoolExecutor.getTask(Unknown Source)
java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
java.lang.Thread.run(Unknown Source)

Thread: ForkJoinPool.commonPool-worker-6 (27) of main
sun.misc.Unsafe.park(Native Method)
java.util.concurrent.ForkJoinPool.awaitWork(Unknown Source)
java.util.concurrent.ForkJoinPool.runWorker(Unknown Source)
java.util.concurrent.ForkJoinWorkerThread.run(Unknown Source)

Thread: Map Status Collector (85) of main
sun.misc.Unsafe.park(Native Method)
java.util.concurrent.locks.LockSupport.park(Unknown Source)
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(Unknown Source)
java.util.concurrent.LinkedBlockingQueue.take(Unknown Source)
org.openstreetmap.josm.gui.MapStatus$Collector.run(MapStatus.java:438)
java.lang.Thread.run(Unknown Source)

Thread: TMS-downloader-13 (76) of main
sun.misc.Unsafe.park(Native Method)
java.util.concurrent.locks.LockSupport.park(Unknown Source)
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(Unknown Source)
java.util.concurrent.LinkedBlockingDeque.takeFirst(Unknown Source)
org.openstreetmap.josm.data.cache.HostLimitQueue.take(HostLimitQueue.java:107)
org.openstreetmap.josm.data.cache.HostLimitQueue.take(HostLimitQueue.java:28)
java.util.concurrent.ThreadPoolExecutor.getTask(Unknown Source)
java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
java.lang.Thread.run(Unknown Source)

Thread: TMS-downloader-8 (71) of main
sun.misc.Unsafe.park(Native Method)
java.util.concurrent.locks.LockSupport.park(Unknown Source)
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(Unknown Source)
java.util.concurrent.LinkedBlockingDeque.takeFirst(Unknown Source)
org.openstreetmap.josm.data.cache.HostLimitQueue.take(HostLimitQueue.java:107)
org.openstreetmap.josm.data.cache.HostLimitQueue.take(HostLimitQueue.java:28)
java.util.concurrent.ThreadPoolExecutor.getTask(Unknown Source)
java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
java.lang.Thread.run(Unknown Source)

Thread: Keep-Alive-Timer (53)
java.lang.Thread.sleep(Native Method)
sun.net.www.http.KeepAliveCache.run(Unknown Source)
java.lang.Thread.run(Unknown Source)

Thread: ForkJoinPool.commonPool-worker-2 (23)
sun.misc.Unsafe.park(Native Method)
java.util.concurrent.ForkJoinPool.awaitWork(Unknown Source)
java.util.concurrent.ForkJoinPool.runWorker(Unknown Source)
java.util.concurrent.ForkJoinWorkerThread.run(Unknown Source)

Thread: TMS-downloader-3 (66) of main
sun.misc.Unsafe.park(Native Method)
java.util.concurrent.locks.LockSupport.park(Unknown Source)
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(Unknown Source)
java.util.concurrent.LinkedBlockingDeque.takeFirst(Unknown Source)
org.openstreetmap.josm.data.cache.HostLimitQueue.take(HostLimitQueue.java:107)
org.openstreetmap.josm.data.cache.HostLimitQueue.take(HostLimitQueue.java:28)
java.util.concurrent.ThreadPoolExecutor.getTask(Unknown Source)
java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
java.lang.Thread.run(Unknown Source)

Thread: File Watcher (30) of main
sun.misc.Unsafe.park(Native Method)
java.util.concurrent.locks.LockSupport.park(Unknown Source)
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(Unknown Source)
java.util.concurrent.LinkedBlockingDeque.takeFirst(Unknown Source)
java.util.concurrent.LinkedBlockingDeque.take(Unknown Source)
sun.nio.fs.AbstractWatchService.take(Unknown Source)
org.openstreetmap.josm.io.FileWatcher.processEvents(FileWatcher.java:120)
org.openstreetmap.josm.io.FileWatcher$$Lambda$160/31544261.run(Unknown Source)
java.lang.Thread.run(Unknown Source)

Thread: TMS-downloader-10 (73) of main
sun.misc.Unsafe.park(Native Method)
java.util.concurrent.locks.LockSupport.park(Unknown Source)
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(Unknown Source)
java.util.concurrent.LinkedBlockingDeque.takeFirst(Unknown Source)
org.openstreetmap.josm.data.cache.HostLimitQueue.take(HostLimitQueue.java:107)
org.openstreetmap.josm.data.cache.HostLimitQueue.take(HostLimitQueue.java:28)
java.util.concurrent.ThreadPoolExecutor.getTask(Unknown Source)
java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
java.lang.Thread.run(Unknown Source)

Thread: TMS-downloader-14 (77) of main
sun.misc.Unsafe.park(Native Method)
java.util.concurrent.locks.LockSupport.park(Unknown Source)
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(Unknown Source)
java.util.concurrent.LinkedBlockingDeque.takeFirst(Unknown Source)
org.openstreetmap.josm.data.cache.HostLimitQueue.take(HostLimitQueue.java:107)
org.openstreetmap.josm.data.cache.HostLimitQueue.take(HostLimitQueue.java:28)
java.util.concurrent.ThreadPoolExecutor.getTask(Unknown Source)
java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
java.lang.Thread.run(Unknown Source)

Thread: ForkJoinPool.commonPool-worker-3 (24) of main
sun.misc.Unsafe.park(Native Method)
java.util.concurrent.ForkJoinPool.awaitWork(Unknown Source)
java.util.concurrent.ForkJoinPool.runWorker(Unknown Source)
java.util.concurrent.ForkJoinWorkerThread.run(Unknown Source)

Thread: TimerQueue (19) of system
sun.misc.Unsafe.park(Native Method)
java.util.concurrent.locks.LockSupport.parkNanos(Unknown Source)
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(Unknown Source)
java.util.concurrent.DelayQueue.take(Unknown Source)
javax.swing.TimerQueue.run(Unknown Source)
java.lang.Thread.run(Unknown Source)

Thread: TMS-downloader-4 (67) of main
sun.misc.Unsafe.park(Native Method)
java.util.concurrent.locks.LockSupport.park(Unknown Source)
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(Unknown Source)
java.util.concurrent.LinkedBlockingDeque.takeFirst(Unknown Source)
org.openstreetmap.josm.data.cache.HostLimitQueue.take(HostLimitQueue.java:107)
org.openstreetmap.josm.data.cache.HostLimitQueue.take(HostLimitQueue.java:28)
java.util.concurrent.ThreadPoolExecutor.getTask(Unknown Source)
java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
java.lang.Thread.run(Unknown Source)

Thread: main-worker-0 (16) of main
java.lang.Object.wait(Native Method)
java.lang.Object.wait(Unknown Source)
java.awt.EventQueue.invokeAndWait(Unknown Source)
java.awt.EventQueue.invokeAndWait(Unknown Source)
org.openstreetmap.josm.gui.PleaseWaitRunnable.doRealRun(PleaseWaitRunnable.java:99)
org.openstreetmap.josm.gui.PleaseWaitRunnable.run(PleaseWaitRunnable.java:142)
java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
java.util.concurrent.FutureTask.run(Unknown Source)
java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
java.lang.Thread.run(Unknown Source)

Thread: image-fetcher-0 (43) of main
sun.misc.Unsafe.park(Native Method)
java.util.concurrent.locks.LockSupport.park(Unknown Source)
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(Unknown Source)
java.util.concurrent.LinkedBlockingQueue.take(Unknown Source)
java.util.concurrent.ThreadPoolExecutor.getTask(Unknown Source)
java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
java.lang.Thread.run(Unknown Source)

Thread: Image Fetcher 0 (83)
java.lang.Object.wait(Native Method)
sun.awt.image.ImageFetcher.nextImage(Unknown Source)
sun.awt.image.ImageFetcher.fetchloop(Unknown Source)
sun.awt.image.ImageFetcher.run(Unknown Source)

Thread: ForkJoinPool.commonPool-worker-7 (51)
sun.misc.Unsafe.park(Native Method)
java.util.concurrent.ForkJoinPool.awaitWork(Unknown Source)
java.util.concurrent.ForkJoinPool.runWorker(Unknown Source)
java.util.concurrent.ForkJoinWorkerThread.run(Unknown Source)

Thread: TMS-downloader-17 (80) of main
sun.misc.Unsafe.park(Native Method)
java.util.concurrent.locks.LockSupport.park(Unknown Source)
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(Unknown Source)
java.util.concurrent.LinkedBlockingDeque.takeFirst(Unknown Source)
org.openstreetmap.josm.data.cache.HostLimitQueue.take(HostLimitQueue.java:107)
org.openstreetmap.josm.data.cache.HostLimitQueue.take(HostLimitQueue.java:28)
java.util.concurrent.ThreadPoolExecutor.getTask(Unknown Source)
java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
java.lang.Thread.run(Unknown Source)

Thread: TMS-downloader-6 (69) of main
sun.misc.Unsafe.park(Native Method)
java.util.concurrent.locks.LockSupport.park(Unknown Source)
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(Unknown Source)
java.util.concurrent.LinkedBlockingDeque.takeFirst(Unknown Source)
org.openstreetmap.josm.data.cache.HostLimitQueue.take(HostLimitQueue.java:107)
org.openstreetmap.josm.data.cache.HostLimitQueue.take(HostLimitQueue.java:28)
java.util.concurrent.ThreadPoolExecutor.getTask(Unknown Source)
java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
java.lang.Thread.run(Unknown Source)

Thread: D3D Screen Updater (21) of system
java.lang.Object.wait(Native Method)
sun.java2d.d3d.D3DScreenUpdateManager.run(Unknown Source)
java.lang.Thread.run(Unknown Source)

Thread: message-notifier-0 (58) of main
sun.misc.Unsafe.park(Native Method)
java.util.concurrent.locks.LockSupport.parkNanos(Unknown Source)
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(Unknown Source)
java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(Unknown Source)
java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(Unknown Source)
java.util.concurrent.ThreadPoolExecutor.getTask(Unknown Source)
java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
java.lang.Thread.run(Unknown Source)

Thread: Timer-1 (61) of main
java.lang.Object.wait(Native Method)
java.util.TimerThread.mainLoop(Unknown Source)
java.util.TimerThread.run(Unknown Source)

Thread: AWT-Shutdown (18) of system
java.lang.Object.wait(Native Method)
java.lang.Object.wait(Unknown Source)
sun.awt.AWTAutoShutdown.run(Unknown Source)
java.lang.Thread.run(Unknown Source)

Thread: Signal Dispatcher (4) of system

Thread: Thread-4 (29) of main
sun.nio.fs.WindowsNativeDispatcher.GetQueuedCompletionStatus0(Native Method)
sun.nio.fs.WindowsNativeDispatcher.GetQueuedCompletionStatus(Unknown Source)
sun.nio.fs.WindowsWatchService$Poller.run(Unknown Source)
java.lang.Thread.run(Unknown Source)

Thread: TMS-downloader-9 (72) of main
sun.misc.Unsafe.park(Native Method)
java.util.concurrent.locks.LockSupport.park(Unknown Source)
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(Unknown Source)
java.util.concurrent.LinkedBlockingDeque.takeFirst(Unknown Source)
org.openstreetmap.josm.data.cache.HostLimitQueue.take(HostLimitQueue.java:107)
org.openstreetmap.josm.data.cache.HostLimitQueue.take(HostLimitQueue.java:28)
java.util.concurrent.ThreadPoolExecutor.getTask(Unknown Source)
java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
java.lang.Thread.run(Unknown Source)

Thread: GT authority factory disposer (48) of main
java.lang.Object.wait(Native Method)
java.util.TimerThread.mainLoop(Unknown Source)
java.util.TimerThread.run(Unknown Source)

[skyper]

Closed as duplicate of #16771.
Please, update your plugins.
See also #21403.

[skyper]

Replying to anonymous:

Identification: JOSM/1.5 (18193 en) Windows 10 64-Bit
OS Build number: Windows 10 Home 2009 (19042)
Java version: 1.8.0_291-b10, Oracle Corporation, Java HotSpot(TM) Client VM

Please, use a 64-bit java version on a 64-bit operating system.

[skyper]

Another user with the same problem: #21419

@anonymous:
Did an update of the plugin work and help or do you still face problems?