MongoDB ClassCastException

2012-12-18 21:37:29,645 ERROR [a.a.t.s.m.MongoTraceEventListener] [akka://atmos/user/1_akka.atmos.trace.store.mongo.MongoTraceEventListener] [atmos-atmos-trace-dispatcher-1] [] : Retry failed. java.lang.Boolean cannot be cast to java.lang.Integer
java.lang.ClassCastException: java.lang.Boolean cannot be cast to java.lang.Integer
        at com.mongodb.DBCollection.isCapped(DBCollection.java:1178) ~[mongo-java-driver-2.8.0.jar:na]
        at com.mongodb.casbah.MongoCollectionBase$class.isCapped(MongoCollection.scala:564) ~[casbah-core_2.9.2-2.4.1.jar:2.4.1]
        at com.mongodb.casbah.MongoCollection.isCapped(MongoCollection.scala:897) ~[casbah-core_2.9.2-2.4.1.jar:2.4.1]
        at akka.atmos.subscribe.repository.MongoNotificationEventLogContext$class.akka$atmos$subscribe$repository$MongoNotificationEventLogContext$$assertCapped(NotificationEventLog.scala:73) ~[atmos-trace-2.0.3.jar:2.0.3]
        at akka.atmos.subscribe.repository.MongoNotificationEventLogContext$$anonfun$1.apply(NotificationEventLog.scala:61) ~[atmos-trace-2.0.3.jar:2.0.3]
        at akka.atmos.subscribe.repository.MongoNotificationEventLogContext$$anonfun$1.apply(NotificationEventLog.scala:57) ~[atmos-trace-2.0.3.jar:2.0.3]
        at akka.atmos.util.MongoRepositoryContext$$anonfun$initDatabase$1.apply(MongoRepositoryContext.scala:60) ~[atmos-trace-2.0.3.jar:2.0.3]
        at akka.atmos.util.MongoRepositoryContext$$anonfun$initDatabase$1.apply(MongoRepositoryContext.scala:59) ~[atmos-trace-2.0.3.jar:2.0.3]
        at scala.collection.immutable.Set$Set2.foreach(Set.scala:106) ~[scala-library.jar:na]
        at akka.atmos.util.MongoRepositoryContext$class.initDatabase(MongoRepositoryContext.scala:59) ~[atmos-trace-2.0.3.jar:2.0.3]
        at akka.atmos.trace.store.mongo.MongoTraceEventRecorder.initDatabase(MongoTraceEventListener.scala:21) ~[atmos-trace-2.0.3.jar:2.0.3]
        at akka.atmos.trace.store.mongo.MongoTraceRepositoryContext$MongoTraceRepository.initDatabase(MongoTraceRepository.scala:35) ~[atmos-trace-2.0.3.jar:2.0.3]
        at akka.atmos.util.MongoDBLookup$class.db(MongoRepositoryContext.scala:40) ~[atmos-trace-2.0.3.jar:2.0.3]
        at akka.atmos.trace.store.mongo.MongoTraceRepositoryContext$MongoTraceRepository.db(MongoTraceRepository.scala:32) ~[atmos-trace-2.0.3.jar:2.0.3]
        at akka.atmos.trace.store.mongo.MongoTraceRepositoryContext$MongoTraceRepository.traceCollection(MongoTraceRepository.scala:39) ~[atmos-trace-2.0.3.jar:2.0.3]
        at akka.atmos.trace.store.mongo.MongoTraceRepositoryContext$MongoTraceRepository.store(MongoTraceRepository.scala:49) ~[atmos-trace-2.0.3.jar:2.0.3]
        at akka.atmos.trace.TraceEventListener$$anonfun$retryStore$1.apply(TraceEventHandler.scala:131) ~[atmos-trace-2.0.3.jar:2.0.3]
        at akka.atmos.trace.TraceEventListener$$anonfun$retryStore$1.apply(TraceEventHandler.scala:131) ~[atmos-trace-2.0.3.jar:2.0.3]
        at scala.collection.Iterator$class.foreach(Iterator.scala:772) ~[scala-library.jar:na]
        at scala.collection.immutable.VectorIterator.foreach(Vector.scala:648) ~[scala-library.jar:na]
        at scala.collection.IterableLike$class.foreach(IterableLike.scala:73) ~[scala-library.jar:na]
        at scala.collection.immutable.Vector.foreach(Vector.scala:63) ~[scala-library.jar:na]
        at akka.atmos.trace.TraceEventListener.retryStore(TraceEventHandler.scala:131) ~[atmos-trace-2.0.3.jar:2.0.3]
        at akka.atmos.trace.TraceEventListener$$anonfun$handle$1.apply$mcV$sp(TraceEventHandler.scala:99) ~[atmos-trace-2.0.3.jar:2.0.3]
        at akka.atmos.trace.TraceEventListener$$anonfun$handle$1.apply(TraceEventHandler.scala:97) ~[atmos-trace-2.0.3.jar:2.0.3]
        at akka.atmos.trace.TraceEventListener$$anonfun$handle$1.apply(TraceEventHandler.scala:97) ~[atmos-trace-2.0.3.jar:2.0.3]
        at akka.atmos.circuitbreaker.CircuitBreakerImpl.invoke(CircuitBreaker.scala:218) ~[atmos-trace-2.0.3.jar:2.0.3]
        at akka.atmos.circuitbreaker.UsingCircuitBreaker$class.withCircuitBreaker(CircuitBreaker.scala:74) ~[atmos-trace-2.0.3.jar:2.0.3]
        at akka.atmos.trace.TraceEventListener.withCircuitBreaker(TraceEventHandler.scala:58) ~[atmos-trace-2.0.3.jar:2.0.3]
        at akka.atmos.trace.TraceEventListener.handle(TraceEventHandler.scala:97) ~[atmos-trace-2.0.3.jar:2.0.3]
        at akka.atmos.trace.TraceEventListener$$anonfun$receive$1.apply(TraceEventHandler.scala:92) ~[atmos-trace-2.0.3.jar:2.0.3]
        at akka.atmos.trace.TraceEventListener$$anonfun$receive$1.apply(TraceEventHandler.scala:91) ~[atmos-trace-2.0.3.jar:2.0.3]
        at akka.actor.Actor$class.apply(Actor.scala:318) ~[atmos-akka-actor-2.0.3.jar:2.0.3]
        at akka.atmos.trace.TraceEventListener.apply(TraceEventHandler.scala:58) ~[atmos-trace-2.0.3.jar:2.0.3]
        at akka.actor.ActorCell.invoke_aroundBody2(ActorCell.scala:626) [atmos-akka-actor-2.0.3.jar:2.0.3]
        at akka.actor.ActorCell.invoke_aroundBody3$advice(ActorCell.scala:531) [atmos-akka-actor-2.0.3.jar:2.0.3]
        at akka.actor.ActorCell.invoke(ActorCell.scala:1) [atmos-akka-actor-2.0.3.jar:2.0.3]
        at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:197) [atmos-akka-actor-2.0.3.jar:2.0.3]
        at akka.dispatch.Mailbox.run(Mailbox.scala:179) [atmos-akka-actor-2.0.3.jar:2.0.3]
        at akka.dispatch.ForkJoinExecutorConfigurator$MailboxExecutionTask.exec(AbstractDispatcher.scala:516) [atmos-akka-actor-2.0.3.jar:2.0.3]
        at akka.jsr166y.ForkJoinTask.doExec(ForkJoinTask.java:259) [atmos-akka-actor-2.0.3.jar:2.0.3]
        at akka.jsr166y.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:975) [atmos-akka-actor-2.0.3.jar:2.0.3]
        at akka.jsr166y.ForkJoinPool.runWorker(ForkJoinPool.java:1479) [atmos-akka-actor-2.0.3.jar:2.0.3]
        at akka.jsr166y.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:104) [atmos-akka-actor-2.0.3.jar:2.0.3]