I have many topics, each with a single subscription that is set to auto-forward messages to a queue. This has worked flawlessly for many months, but all of a sudden forwarding has stopped.
When I examine the subscription's MessageCountDetails, I can see the following:
ActiveMessageCount: 47
DeadLetterMessageCount: 0
ScheduledMessageCount: 0
TransferMessageCount: 0
TransferDeadLetterMessageCount: 0
The messages never get sent to the destination queue; what's wrong here and what can be done to fix it?