Azure Function Durable work-item count exceeds the configured maximum active work-item count

Question

Hi guys, right now we are testing a durable functions thats use Fan out/fan in pattern. Everything is working well but when we try to scale the level of parallelism we get this message:

"Delaying work item fetching because the current active work-item count exceeds the configured maximum active work-item count (20)"

We try to fix it setting this Application setting : WEBSITE_MAX_DYNAMIC_APPLICATION_SCALE_OUT = 200

And this scale out parameter: Maximum Scale Out Limit : 200

So guys, if you know the way to get the behavior we are looking for, will be nice if you could guide us.

Thanks for your help.

Answer 1

@Alejandro Benitez Aragon The error that you are observing are at the host level (per instance) and are concurrency throttles that can be configured in host.json depending on your scenario.