We have been having this problem for the past couple of weeks. Activations complete just fine to all other agents except the dispatcher flush. The queue keeps building up and the only way to clear it is by restarting the replication bundle repeateadly (approximately 10-15 times for 200+ queued items).
Can anyone suggest how to troubleshoot this issue? Any help is appreciated.
Environment: CQ 5.3, CRX 2.2
I'd suggest a couple things:
Check if you have configured any /etc/map/ incorrectly (especially with the /content). I had similar issue where I was not able to publish from author to publish instance and it just queues up.