Manuel Astudillo

What makes you believe msgpackr is creating this issue? BTW; it is just plain javascript: https://www.npmjs.com/package/msgpackr

I see, it states that it is an optional dependency but it is enabled by default: https://www.npmjs.com/package/msgpackr

Are you using sandboxed processors or standard?

In order to be able to investigate this issue further we would need some simple test that we can run to reproduce it.

@HosseinAgha I am on Mac. What piece of test code should I use to reproduce it?

this is actually more a question for redis in general, but the thing that is specific for bull is that one queue cannot scale horizontally so in order to scale...

what are your requirements in jobs/second?

in that case scalability is not a problem, Bullmq can process easily 5k jobs per second, you just need to add more workers and increase concurrency to meet your demands.

technically if you run the same code in different servers they will be different instances, so yes.

The proper amount of concurrency is something you need to finetune by doing some calculations that depends on your particular time for processing messages, your particular latency requirements, and so...