Cannot import name FlowerCommand from flower.command

Question

I have installed apache airflow version 2.1.2 but when I starts the worker then it says that it cannot import name FlowerCommand from flower.command.

Operating system centos 7, python version is 3.7.6, apahce-airflow version is 2.1.2, celery version is 4.4.7, flower version is 0.9.7

I have attached a scrennshot of my error for further calarification

Answer 1

Airflow 2.1.2 doesn't support Celery 5 yet.

Long story short: just downgrade Celery provider:

$ pip install --upgrade apache-airflow-providers-celery==2.0.0

More details are within issue:

https://github.com/apache/airflow/discussions/18115