NPE in IndexedDiskCache

[naoliv]

I don't know how to reprocude this, sorry, but today while opening JOSM and editing one small place, I saw this in console:

[INFO] IndexedDiskCache - Region [TMS] Cache file root directory: /home/naoliv/.josm/cache/tiles
[INFO] IndexedDiskCache - Region [TMS] Set maxKeySize to: '524288'
INFO: GET https://api.openstreetmap.org/api/0.6/user/details (obter o número de mensagens não lidas) -> 200 (997 B)
[ERROR] IndexedDiskCache - Region [TMS] Problem loading keys for file TMS <java.lang.NullPointerException>java.lang.NullPointerException
	at org.apache.commons.jcs.auxiliary.disk.indexed.IndexedDiskCache.addToRecycleBin(IndexedDiskCache.java:1181)
	at org.apache.commons.jcs.auxiliary.disk.indexed.IndexedDiskCache$LRUMapSizeLimited.processRemovedLRU(IndexedDiskCache.java:1785)
	at org.apache.commons.jcs.auxiliary.disk.indexed.IndexedDiskCache$LRUMapSizeLimited.processRemovedLRU(IndexedDiskCache.java:1684)
	at org.apache.commons.jcs.utils.struct.AbstractLRUMap.put(AbstractLRUMap.java:344)
	at org.apache.commons.jcs.auxiliary.disk.indexed.IndexedDiskCache$LRUMapSizeLimited.put(IndexedDiskCache.java:1732)
	at org.apache.commons.jcs.auxiliary.disk.indexed.IndexedDiskCache$LRUMapSizeLimited.put(IndexedDiskCache.java:1684)
	at org.apache.commons.jcs.utils.struct.AbstractLRUMap.putAll(AbstractLRUMap.java:187)
	at org.apache.commons.jcs.auxiliary.disk.indexed.IndexedDiskCache.loadKeys(IndexedDiskCache.java:343)
	at org.apache.commons.jcs.auxiliary.disk.indexed.IndexedDiskCache.initializeStoreFromPersistedData(IndexedDiskCache.java:286)
	at org.apache.commons.jcs.auxiliary.disk.indexed.IndexedDiskCache.initializeKeysAndData(IndexedDiskCache.java:250)
	at org.apache.commons.jcs.auxiliary.disk.indexed.IndexedDiskCache.<init>(IndexedDiskCache.java:182)
	at org.apache.commons.jcs.auxiliary.disk.indexed.IndexedDiskCacheFactory.createCache(IndexedDiskCacheFactory.java:60)
	at org.apache.commons.jcs.auxiliary.disk.indexed.IndexedDiskCacheFactory.createCache(IndexedDiskCacheFactory.java:33)
	at org.openstreetmap.josm.data.cache.JCSCacheManager.getCacheInner(JCSCacheManager.java:168)
	at org.openstreetmap.josm.data.cache.JCSCacheManager.getCache(JCSCacheManager.java:155)
	at org.openstreetmap.josm.gui.layer.AbstractCachedTileSourceLayer.getCache(AbstractCachedTileSourceLayer.java:122)
	at org.openstreetmap.josm.gui.layer.AbstractCachedTileSourceLayer.getTileLoaderFactory(AbstractCachedTileSourceLayer.java:113)
	at org.openstreetmap.josm.gui.bbox.SlippyMapBBoxChooser.<init>(SlippyMapBBoxChooser.java:143)
	at org.openstreetmap.josm.gui.download.SlippyMapChooser.<init>(SlippyMapChooser.java:35)
	at org.openstreetmap.josm.gui.download.DownloadDialog.buildMainPanel(DownloadDialog.java:120)
	at org.openstreetmap.josm.gui.download.DownloadDialog.<init>(DownloadDialog.java:236)
	at org.openstreetmap.josm.gui.download.DownloadDialog.<init>(DownloadDialog.java:224)
	at org.openstreetmap.josm.gui.download.DownloadDialog.getInstance(DownloadDialog.java:66)
	at org.openstreetmap.josm.actions.DownloadAction.actionPerformed(DownloadAction.java:43)
	at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2022)
	at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2348)
	at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)
	at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)
	at javax.swing.AbstractButton.doClick(AbstractButton.java:376)
	at javax.swing.plaf.basic.BasicMenuItemUI.doClick(BasicMenuItemUI.java:833)
	at javax.swing.plaf.basic.BasicMenuItemUI$Handler.mouseReleased(BasicMenuItemUI.java:877)
	at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:289)
	at java.awt.Component.processMouseEvent(Component.java:6535)
	at javax.swing.JComponent.processMouseEvent(JComponent.java:3324)
	at java.awt.Component.processEvent(Component.java:6300)
	at java.awt.Container.processEvent(Container.java:2236)
	at java.awt.Component.dispatchEventImpl(Component.java:4891)
	at java.awt.Container.dispatchEventImpl(Container.java:2294)
	at java.awt.Component.dispatchEvent(Component.java:4713)
	at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4888)
	at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4525)
	at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4466)
	at java.awt.Container.dispatchEventImpl(Container.java:2280)
	at java.awt.Window.dispatchEventImpl(Window.java:2750)
	at java.awt.Component.dispatchEvent(Component.java:4713)
	at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758)
	at java.awt.EventQueue.access$500(EventQueue.java:97)
	at java.awt.EventQueue$3.run(EventQueue.java:709)
	at java.awt.EventQueue$3.run(EventQueue.java:703)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76)
	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:86)
	at java.awt.EventQueue$4.run(EventQueue.java:731)
	at java.awt.EventQueue$4.run(EventQueue.java:729)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:728)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)

[INFO] IndexedDiskCache - Region [TMS] Finished inital consistency check, isOk = true in 39ms.
[INFO] IndexedDiskCache - Region [TMS] Indexed Disk Cache is alive.
INFO: GET https://c.tile.openstreetmap.org/16/34997/21867.png -> 200 (1,54 kB)
[INFO] CacheEventQueue - Cache event queue created: CacheEventQueue [listenerId=1273436920, cacheName=TMS]
INFO: GET https://c.tile.openstreetmap.org/16/34998/21865.png -> 200 (3,11 kB)
INFO: GET https://b.tile.openstreetmap.org/16/34997/21865.png -> 200 (7,33 kB)
(…)

JOSM:

URL:http://josm.openstreetmap.de/svn/trunk
Repository:UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Last:Changed Date: 2016-01-16 03:00:56 +0100 (Sat, 16 Jan 2016)
Build-Date:2016-01-16 02:34:12
Revision:9480
Relative:URL: ^/trunk

Identification: JOSM/1.5 (9480 pt_BR) Linux Debian GNU/Linux unstable (sid)
Memory Usage: 538 MB / 3641 MB (355 MB allocated, but free)
Java version: 1.8.0_72-internal-b05, Oracle Corporation, OpenJDK 64-Bit Server VM
VM arguments: [-Dawt.useSystemAAFontSettings=on]

Plugins:
- AddrInterpolation (31772)
- Create_grid_of_ways (31772)
- FastDraw (31895)
- FixAddresses (31772)
- OpeningHoursEditor (31772)
- PicLayer (31895)
- SimplifyArea (31895)
- apache-commons (31895)
- buildings_tools (31895)
- download_along (31772)
- editgpx (31772)
- ejml (31895)
- geotools (31895)
- graphview (31895)
- jts (31772)
- log4j (31895)
- measurement (31895)
- merge-overlap (31967)
- opendata (31937)
- pdfimport (31895)
- photo_geotagging (31895)
- poly (31772)
- reverter (31926)
- tagging-preset-tester (31895)
- todo (29154)
- turnrestrictions (31895)
- undelete (31895)
- utilsplugin2 (31895)

[wiktorn]

Looks like you've encountered race condition within JCS. I've reported this to JCS:
​https://issues.apache.org/jira/browse/JCS-158