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java.util.ConcurrentModificationException at java.util.Hashtable$Enumerator.next(Hashtable.java:1020) at org.infoglue.deliver.util.CacheController.clearCaches(CacheController.java:369) at org.infoglue.deliver.util.CacheController.evictWaitingCache(CacheController.java:966) at org.infoglue.deliver.jobs.ExpireCacheJob.execute(ExpireCacheJob.java:49) at org.quartz.core.JobRunShell.run(JobRunShell.java:191) at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:516)