ERROR: Problem adding event for gateway

[Guest]

Seeing lots of these in my eventgateway log

Problem adding event for gateway UPSGateway: Queue size of 10 exceeded when attempting to add more assignments into the threadpool task queue

UPSGateway is an async cfml gateway which is triggered by a directory watcher gateway.
Any ideas what might be causing it? There's exactly 1 result from google on "Problem adding event for gateway"

Is this maybe due to Dev edition gateway limitations?

[BKBK]

If I remember well, the limitations on gateways in the Developer Edition are connection limitations. Whereas, you have exceeded a queue size.

Go to the Settings page in the Event Gateways section in the Coldfusion Administrator. The settings relevant to your problem are Event Gateway Processing Threads and Maximum number of events to queue.