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java.util.ConcurrentModificationException: 	at java.util.LinkedHashMap$LinkedHashIterator.nextEntry(Unknown Source)	at java.util.LinkedHashMap$EntryIterator.next(Unknown Source)	at java.util.LinkedHashMap$EntryIterator.next(Unknown Source)	at org.apache.jackrabbit.core.security.authorization.acl.CachingPentahoEntryCollector.notifyListeners(CachingPentahoEntryCollector.java:273)	at org.apache.jackrabbit.core.security.authorization.acl.EntryCollector.onEvent(EntryCollector.java:244)	at org.apache.jackrabbit.core.observation.EventConsumer.consumeEvents(EventConsumer.java:249)	at org.apache.jackrabbit.core.observation.ObservationDispatcher.dispatchEvents(ObservationDispatcher.java:214)	at org.apache.jackrabbit.core.observation.EventStateCollection.dispatch(EventStateCollection.java:475)	at org.apache.jackrabbit.core.state.SharedItemStateManager$Update.end(SharedItemStateManager.java:801)	at org.apache.jackrabbit.core.state.XAItemStateManager.commit(XAItemStateManager.java:181)	at org.apache.jackrabbit.core.TransactionContext.commit(TransactionContext.java:195)	at org.apache.jackrabbit.core.XASessionImpl.commit(XASessionImpl.java:326)	at org.springframework.extensions.jcr.jackrabbit.support.JackRabbitUserTransaction.commit(JackRabbitUserTransaction.java:95)	at org.springframework.extensions.jcr.jackrabbit.LocalTransactionManager.doCommit(LocalTransactionManager.java:189)	at org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit(AbstractPlatformTransactionManager.java:732)	at org.springframework.transaction.support.AbstractPlatformTransactionManager.commit(AbstractPlatformTransactionManager.java:701)	at org.springframework.transaction.interceptor.TransactionAspectSupport.commitTransactionAfterReturning(TransactionAspectSupport.java:321)	at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:116)	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)	at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)	at com.sun.proxy.$Proxy27.createFile(Unknown Source)	at org.pentaho.platform.repository2.unified.ExceptionLoggingDecorator$2.call(ExceptionLoggingDecorator.java:80)	at org.pentaho.platform.repository2.unified.ExceptionLoggingDecorator$2.call(ExceptionLoggingDecorator.java:78)	at org.pentaho.platform.repository2.unified.ExceptionLoggingDecorator.callLogThrow(ExceptionLoggingDecorator.java:453)	at org.pentaho.platform.repository2.unified.ExceptionLoggingDecorator.createFile(ExceptionLoggingDecorator.java:78)	at org.pentaho.platform.repository2.unified.fileio.RepositoryFileOutputStream.flush(RepositoryFileOutputStream.java:216)	at org.pentaho.platform.repository2.unified.fileio.RepositoryFileOutputStream.close(RepositoryFileOutputStream.java:154)	at org.pentaho.reporting.platform.plugin.repository.ReportContentLocation.createItem(ReportContentLocation.java:106)