Second simultaneous read on fileno detected. Flask/SqlAlchemy MySql connection issue

General
1

Having an issue going from my local environment to my production one. It works fine locally but when I upload my flask app to my server and connect it to my MySql instance I’m getting the following error:

RuntimeError: Second simultaneous read on fileno 27 detected.  Unless you really know what you're doing, make sure that only one greenthread can read any particular socket.  Consider using a pools.Pool. If you do know what you're doing and want to disable this error, call eventlet.debug.hub_prevent_multiple_readers(False) - MY THREAD=<function select.<locals>.on_read at 0x7f7b4a222a20>; THAT THREAD=FdListener('read', 27, <function select.<locals>.on_read at 0x7f7b4a221a80>, <built-in method throw of GreenThread object at 0x7f7b4a1994c0>)

I am making several API calls simultaneously which is causing this error. if I test the api calls individually in postman, they work just fine, but when I try to load it from my web app, I get the simultaneous connection error.

I have pools enabled

SQLALCHEMY_ENGINE_OPTIONS = {
    'pool_size': 10,
    'pool_recycle': 120,
    'pool_pre_ping': True
}

and I have verified that they are active (db.engine.pool.status() gives me 10 pools)

I’m making the db calls as follows simultaneously from two inbound api endpoints:

class UsersApi(Resource): 
    def get(self): 
        users = db.session.query(Users).all() 
        return users_schema.dump(users)

and

class LocationsApi(Resource): 
    def get(self): 
        locations = db.session.get(Locations).all() 
        return locations_schema.dump(locations)

do I need to change how I call for the data? Does it not automatically use the pool connections?