## inicialización de base de datos en apache airflow. He instalado apache airflow en linux con la versión python 3.8. mientras ejecuta los comandos de flujo de aire que muestran el nombre de la versión. Ocurrió un error al inicializar la base de datos en Airflow. explique el error a continuación y la solución, gracias

 /home/hduser/apache_airflow/venv/lib/python3.6/site-packages/sqlalchemy/orm/relationships.py:3463 SAWarning: relationship 'DagRun.serialized_dag' will copy column serialized_dag.dag_id to column dag_run.dag_id, which conflicts with relationship(s): 'TaskInstance.dag_run' (copies task_instance.dag_id to dag_run.dag_id), 'DagRun.task_instances' (copies task_instance.dag_id to dag_run.dag_id). If this is not the intention, consider if these relationships should be linked with back_populates, or if viewonly=True should be applied to one or more if they are read-only. For the less common case that foreign key constraints are partially overlapping, the orm.foreign() annotation can be used to isolate the columns that should be written towards. The 'overlaps' parameter may be used to remove this warning. (Background on this error at: http://sqlalche.me/e/14/qzyx) /home/hduser/apache_airflow/venv/lib/python3.6/site-packages/sqlalchemy/orm/relationships.py:3463 SAWarning: relationship 'SerializedDagModel.dag_runs' will copy column serialized_dag.dag_id to column dag_run.dag_id, which conflicts with relationship(s): 'TaskInstance.dag_run' (copies task_instance.dag_id to dag_run.dag_id), 'DagRun.task_instances' (copies task_instance.dag_id to dag_run.dag_id). If this is not the intention, consider if these relationships should be linked with back_populates, or if viewonly=True should be applied to one or more if they are read-only. For the less common case that foreign key constraints are partially overlapping, the orm.foreign() annotation can be used to isolate the columns that should be written towards. The 'overlaps' parameter may be used to remove this warning. (Background on this error at: http://sqlalche.me/e/14/qzyx) ____________ _____________ ____ |__( )_________ __/__ /________ __ ____ /| |_ /__ ___/_ /_ __ /_ __ \_ | /| / / ___ ___ | / _ / _ __/ _ / / /_/ /_ |/ |/ / _/_/ |_/_/ /_/ /_/ /_/ \____/____/|__/ [2021-04-29 11:50:40,298] {dagbag.py:448} INFO - Filling up the DagBag from /dev/null [2021-04-29 11:50:40,330] {manager.py:727} WARNING - No user yet created, use flask fab command to do it. [2021-04-29 11:50:41,340] {abstract.py:229} ERROR - Failed to add operation for GET /api/v1/connections Traceback (most recent call last): File "/home/hduser/apache_airflow/venv/lib/python3.6/site-packages/connexion/apis/abstract.py", line 209, in add_paths self.add_operation(path, method) File "/home/hduser/apache_airflow/venv/lib/python3.6/site-packages/connexion/apis/abstract.py", line 173, in add_operation pass_context_arg_name=self.pass_context_arg_name File "/home/hduser/apache_airflow/venv/lib/python3.6/site-packages/connexion/operations/__init__.py", line 8, in make_operation return spec.operation_cls.from_spec(spec, *args, **kwargs) File "/home/hduser/apache_airflow/venv/lib/python3.6/site-packages/connexion/operations/openapi.py", line 138, in from_spec **kwargs File "/home/hduser/apache_airflow/venv/lib/python3.6/site-packages/connexion/operations/openapi.py", line 89, in __init__ pass_context_arg_name=pass_context_arg_name File "/home/hduser/apache_airflow/venv/lib/python3.6/site-packages/connexion/operations/abstract.py", line 96, in __init__ self._resolution = resolver.resolve(self) File "/home/hduser/apache_airflow/venv/lib/python3.6/site-packages/connexion/resolver.py", line 40, in resolve return Resolution(self.resolve_function_from_operation_id(operation_id), operation_id) File "/home/hduser/apache_airflow/venv/lib/python3.6/site-packages/connexion/resolver.py", line 66, in resolve_function_from_operation_id raise ResolverError(str(e), sys.exc_info()) connexion.exceptions.ResolverError: <ResolverError: columns> During handling of the above exception, another exception occurred: Traceback (most recent call last): File "/home/hduser/apache_airflow/venv/bin/airflow", line 8, in <module> sys.exit(main()) File "/home/hduser/apache_airflow/venv/lib/python3.6/site-packages/airflow/__main__.py", line 40, in main args.func(args) File "/home/hduser/apache_airflow/venv/lib/python3.6/site-packages/airflow/cli/cli_parser.py", line 48, in command return func(*args, **kwargs) File "/home/hduser/apache_airflow/venv/lib/python3.6/site-packages/airflow/utils/cli.py", line 89, in wrapper return f(*args, **kwargs) File "/home/hduser/apache_airflow/venv/lib/python3.6/site-packages/airflow/cli/commands/webserver_command.py", line 360, in webserver app = cached_app(None) File "/home/hduser/apache_airflow/venv/lib/python3.6/site-packages/airflow/www/app.py", line 135, in cached_app app = create_app(config=config, testing=testing) File "/home/hduser/apache_airflow/venv/lib/python3.6/site-packages/airflow/www/app.py", line 120, in create_app init_api_connexion(flask_app) File "/home/hduser/apache_airflow/venv/lib/python3.6/site-packages/airflow/www/extensions/init_views.py", line 172, in init_api_connexion specification='v1.yaml', base_path=base_path, validate_responses=True, strict_validation=True File "/home/hduser/apache_airflow/venv/lib/python3.6/site-packages/connexion/apps/flask_app.py", line 57, in add_api api = super(FlaskApp, self).add_api(specification, **kwargs) File "/home/hduser/apache_airflow/venv/lib/python3.6/site-packages/connexion/apps/abstract.py", line 156, in add_api options=api_options.as_dict()) File "/home/hduser/apache_airflow/venv/lib/python3.6/site-packages/connexion/apis/abstract.py", line 111, in __init__ self.add_paths() File "/home/hduser/apache_airflow/venv/lib/python3.6/site-packages/connexion/apis/abstract.py", line 216, in add_paths self._handle_add_operation_error(path, method, err.exc_info) File "/home/hduser/apache_airflow/venv/lib/python3.6/site-packages/connexion/apis/abstract.py", line 231, in _handle_add_operation_error raise value.with_traceback(traceback) File "/home/hduser/apache_airflow/venv/lib/python3.6/site-packages/connexion/resolver.py", line 61, in resolve_function_from_operation_id return self.function_resolver(operation_id) File "/home/hduser/apache_airflow/venv/lib/python3.6/site-packages/connexion/utils.py", line 111, in get_function_from_name module = importlib.import_module(module_name) File "/home/hduser/apache_airflow/venv/lib64/python3.6/importlib/__init__.py", line 126, in import_module return _bootstrap._gcd_import(name[level:], package, level) File "<frozen importlib._bootstrap>", line 994, in _gcd_import File "<frozen importlib._bootstrap>", line 971, in _find_and_load File "<frozen importlib._bootstrap>", line 955, in _find_and_load_unlocked File "<frozen importlib._bootstrap>", line 665, in _load_unlocked File "<frozen importlib._bootstrap_external>", line 678, in exec_module File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed File "/home/hduser/apache_airflow/venv/lib/python3.6/site-packages/airflow/api_connexion/endpoints/connection_endpoint.py", line 26, in <module> from airflow.api_connexion.schemas.connection_schema import ( File "/home/hduser/apache_airflow/venv/lib/python3.6/site-packages/airflow/api_connexion/schemas/connection_schema.py", line 42, in <module> class ConnectionSchema(ConnectionCollectionItemSchema): # pylint: disable=too-many-ancestors File "/home/hduser/apache_airflow/venv/lib/python3.6/site-packages/marshmallow/schema.py", line 125, in __new__ dict_cls=dict_cls, File "/home/hduser/apache_airflow/venv/lib/python3.6/site-packages/marshmallow_sqlalchemy/schema/sqlalchemy_schema.py", line 92, in get_declared_fields fields.update(mcs.get_auto_fields(fields, converter, opts, dict_cls)) File "/home/hduser/apache_airflow/venv/lib/python3.6/site-packages/marshmallow_sqlalchemy/schema/sqlalchemy_schema.py", line 106, in get_auto_fields for field_name, field in fields.items() File "/home/hduser/apache_airflow/venv/lib/python3.6/site-packages/marshmallow_sqlalchemy/schema/sqlalchemy_schema.py", line 108, in <dictcomp> and field_name not in opts.exclude File "/home/hduser/apache_airflow/venv/lib/python3.6/site-packages/marshmallow_sqlalchemy/schema/sqlalchemy_schema.py", line 28, in create_field return converter.field_for(model, column_name, **self.field_kwargs) File "/home/hduser/apache_airflow/venv/lib/python3.6/site-packages/marshmallow_sqlalchemy/convert.py", line 179, in field_for converted_prop = self.property2field(prop, **kwargs) File "/home/hduser/apache_airflow/venv/lib/python3.6/site-packages/marshmallow_sqlalchemy/convert.py", line 146, in property2field field_class = field_class or self._get_field_class_for_property(prop) File "/home/hduser/apache_airflow/venv/lib/python3.6/site-packages/marshmallow_sqlalchemy/convert.py", line 223, in _get_field_class_for_property column = prop.columns[0] File "/home/hduser/apache_airflow/venv/lib/python3.6/site-packages/sqlalchemy/util/langhelpers.py", line 1220, in __getattr__ return self._fallback_getattr(key) File "/home/hduser/apache_airflow/venv/lib/python3.6/site-packages/sqlalchemy/util/langhelpers.py", line 1194, in _fallback_getattr raise AttributeError(key) AttributeError: columns

lo anterior es el error al ejecutar airflow initdb