Github user mbroadst commented on a diff in the pull request: https://github.com/apache/qpid/pull/9#discussion_r68322985 --- Diff: qpid/cpp/src/qpid/broker/amqp/Outgoing.cpp --- @@ -79,6 +79,9 @@ OutgoingFromQueue::OutgoingFromQueue(Broker& broker, const std::string& source, void OutgoingFromQueue::init() { + // observe queue for changes to track undeliverable messages + queue->getObservers().add(boost::shared_ptr<QueueObserver>(shared_from_this())); + --- End diff -- I wondered about that. From other examples of QueueObserver's in the codebase I didn't see anything that explicitly removed itself from the observer list, so assumed (dangerously/lazily ð) it was cleaned up automatically somewhere.
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