resolve https://issues.apache.org/activemq/browse/AMQ-2468 - limit pagedInPendingDispatch to maxPageSize and bypass dispatch for jmx queue modifications like purge and remove matching messages so they are not limited by pending messages and can page through all messages. Resolve intermittent deadlock in AMQ2102Test. Note: sparse selectors may need to increase maxPageSize as ever increasing pagedInPendingDispatch was exceeding that limit in error
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activemq/trunk/activemq-core/src/main/java/org/apache/activemq/broker/region/Queue.java