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via Geographic Information Systems by gnarbarian
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java.lang.IllegalStateException: Expected: RenderedImageMap, got null	at org.geoserver.gwc.layer.GeoServerTileLayer.dispatchGetMap(	at org.geoserver.gwc.layer.GeoServerTileLayer.getMetatilingReponse(	at org.geoserver.gwc.layer.GeoServerTileLayer.seedTile(	at org.geowebcache.seed.SeedTask.doActionInternal(	at org.geowebcache.seed.GWCTask.doAction(	at	at	at	at java.util.concurrent.ThreadPoolExecutor.runWorker(	at java.util.concurrent.ThreadPoolExecutor$	at