https://issues.apache.org/jira/browse/AMQ-3206 - Unsubscribed durable sub can leave dangling message reference in kahaDB, visible after a restart resolved by correctly updating the persitent index when a durable sub with an outstanding backlog is unsubscribed. Additional test that vaidates fix
activemq/trunk/activemq-core/src/main/java/org/apache/activemq/store/kahadb/KahaDBPersistenceAdapter.java