celery: daemonic processes are not allowed to have children

Question

In Python (2.7) I try to create processes (with multiprocessing) in a celery task (celery 3.1.17) but it gives the error:

daemonic processes are not allowed to h         


        

Answer 1

If you are using a submodule/library with multiprocessing already baked in, it may make more sense to set the -P threads argument of the worker:

celery worker -P threads

https://github.com/celery/celery/issues/4525#issuecomment-566503932