2009-08-11 09:06:16,984 ERROR info.magnolia.cms.core.DefaultNodeData            : Failed to get handle
2009-08-11 09:06:17,010 ERROR info.magnolia.cms.core.DefaultNodeData            : this session has been closed
javax.jcr.RepositoryException: this session has been closed
	at org.apache.jackrabbit.core.SessionImpl.sanityCheck(SessionImpl.java:381)
	at org.apache.jackrabbit.core.ItemImpl.sanityCheck(ItemImpl.java:137)
	at org.apache.jackrabbit.core.ItemImpl.getPath(ItemImpl.java:1270)
	at info.magnolia.cms.core.DefaultNodeData.getHandle(DefaultNodeData.java:571)
	at info.magnolia.cms.util.NodeDataWrapper.getHandle(NodeDataWrapper.java:114)
	at info.magnolia.imaging.parameters.SimpleEqualityNodeDataWrapper.hashCode(SimpleEqualityNodeDataWrapper.java:39)
	at info.magnolia.module.extendedtemplatingkit.imaging.generation.STKParameter.hashCode(STKParameter.java:79)
	at info.magnolia.imaging.caching.ImageGenerationJob.hashCode(ImageGenerationJob.java:62)
	at com.google.common.collect.MapMaker$Strength$3.hash(MapMaker.java:374)
	at com.google.common.collect.MapMaker$StrategyImpl.hashKey(MapMaker.java:498)
	at com.google.common.collect.CustomConcurrentHashMap$Impl.hash(CustomConcurrentHashMap.java:634)
	at com.google.common.collect.CustomConcurrentHashMap$Impl.remove(CustomConcurrentHashMap.java:1495)
	at com.google.common.collect.MapMaker$StrategyImpl$1.run(MapMaker.java:483)
	at java.util.TimerThread.mainLoop(Timer.java:512)
	at java.util.TimerThread.run(Timer.java:462)