Celery, RabbitMQ removes worker from consumers list while it is performing tasks

I have started my celery worker, which uses RabbitMQ as broker, like this:

celery -A my_app worker -l info -P gevent -c 100 --prefetch-multiplier=1 -Q my_app

Then I have task which looks quite like this:

@shared_task(queue='my_app', default_retry_delay=10, max_retries=1, time_limit=8 * 60)
def example_task():
    # getting queryset with some filtering
    my_models = MyModel.objects.filter(...)

    for my_model in my_models.iterator():

Sometimes this task can be fininshed less than a minute and sometimes, during highload, it requires more than 5 minutes to finish.

The main problem is that RabbitMQ constantly removes my worker from consumers list. It looks really random. Because of that I need to restart worker again.

Workers also starts throwing these errors:

SSLEOFError: EOF occurred in violation of protocol (_ssl.c:2396)

Sometimes these errors:

consumer: Cannot connect to amqps://my_app:**@example.com:5671/prod: SSLEOFError(8, 'EOF occurred in violation of protocol (_ssl.c:997)').

Couldn't ack 2057, reason:"RecoverableConnectionError(None, 'connection already closed', None, '')"

I have tried to add --without-heartbeat but it does nothing.

How to solve this problems? Sometimes my tasks takes more than 30 minutes to finish, and I can't constantly monitor if workers were kicked out from rabbitmq.

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