org.hibernate.LazyInitializationException: failed to lazily initialize a collection of role: org.openmrs.Location.childLocations, no session or session was closed
	org.hibernate.collection.AbstractPersistentCollection.throwLazyInitializationException(AbstractPersistentCollection.java:383)
	org.hibernate.collection.AbstractPersistentCollection.throwLazyInitializationExceptionIfNotConnected(AbstractPersistentCollection.java:375)
	org.hibernate.collection.AbstractPersistentCollection.initialize(AbstractPersistentCollection.java:368)
	org.hibernate.collection.AbstractPersistentCollection.read(AbstractPersistentCollection.java:111)
	org.hibernate.collection.PersistentSet.iterator(PersistentSet.java:186)
	org.openmrs.module.appointment.api.impl.AppointmentServiceImpl.getAllLocationDescendants(AppointmentServiceImpl.java:518)
	org.openmrs.module.appointment.api.impl.AppointmentServiceImpl.getAppointmentsByConstraints(AppointmentServiceImpl.java:537)