If the receiver on a queue do not exit cleanly other clients are blocked to receive messages from that queue.

It seems that there is an clean-up issue after non-clean exit of a consumer that leads to that other consumers are blocked to receive messages from that queue for ~40-60 seconds. It may be considered as a DoS issue.

consumerCount shows that 1 consumer is connected after client kill. When client is connected again, consumerCount shows 2. When the message is received (after ~40-60 seconds) consumerCount shows 0.