Session.getStatistics().getEntityCount() throws UnsupportedOperationException ----------------------------------------------------------------------------- Key: HHH-805 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-805 Project: Hibernate Core Issue Type: Bug Components: core Affects Versions: 3.1 rc3 Reporter: Derek Hulley Assignee: Emmanuel Bernard Priority: Minor Fix For: 3.1 beta 2 The following code: SessionStatistics stats = session.getStatistics(); // have we exceeded the maximum entity count int entityCount = stats.getEntityCount(); throws an UnsupportedOperationException originating in: org.hibernate.util.IdentityMap#keySet() The following lines in SessionStatisticsImpl.java fix the issue: ======================== public int getEntityCount() { return session.getPersistenceContext().getEntityEntries().size(); } public int getCollectionCount() { return session.getPersistenceContext().getCollectionEntries().size(); } =========================