Currently when a Queue is deleted the associated Consumers are not closed.
This is essentially a resource leak.
Note: In 6.1.x, for the AMQP 1.0 protocol, deleting a queue did detach the sending links (without error). Receiving links were not detached. This code (org.apache.qpid.server.protocol.v1_0.ConsumerTarget_1_0#queueDeleted) was removed in 7.0.x and this JIRA raised.