https://issues.apache.org/jira/browse/AMQ-3806 - Partial index updates can lead to bogus recovery for the vmcursor of a Q on startup. Only recovery destinations with that have some messages, so the location index is the system or reference. It makes sense as the location index is the basis for gc
activemq/trunk/activemq-core/src/main/java/org/apache/activemq/broker/region/Queue.java