all the dags are reporting errors airflow.exceptions.SerializedDagNotFound:

[gowdra01]

there are lot of dags which are reporting this error .. I am not sure what's the reason
it started to appear suddenly.
I am running airflow v2.1.1

[thesuperzapper]

@gowdra01 if it appeared suddenly, it's almost certainly an issue caused by a DAG change, what has changed recently in your cluster?

You also might be experiencing something similar to: apache/airflow#15607 (comment)

[gowdra01]

actually all the dags are throwing the error. also I am getting facing this health check issues .. access denied to mysql db ,although I am able to login to airflow

only the scheduler is reporting this error (web is fine) .. what could be the reason ? @thesuperzapper

"/home/airflow/.local/lib/python3.8/site-packages/sqlalchemy/pool/base.py", line 661, in __connect pool.logger.debug("Error on connect(): %s", e) File "/home/airflow/.local/lib/python3.8/site-packages/sqlalchemy/util/langhelpers.py", line 68, in __exit__ compat.raise_( File "/home/airflow/.local/lib/python3.8/site-packages/sqlalchemy/util/compat.py", line 182, in raise_ raise exception File "/home/airflow/.local/lib/python3.8/site-packages/sqlalchemy/pool/base.py", line 656, in __connect connection = pool._invoke_creator(self) File "/home/airflow/.local/lib/python3.8/site-packages/sqlalchemy/engine/strategies.py", line 114, in connect return dialect.connect(*cargs, **cparams) File "/home/airflow/.local/lib/python3.8/site-packages/sqlalchemy/engine/default.py", line 508, in connect return self.dbapi.connect(*cargs, **cparams) File "/home/airflow/.local/lib/python3.8/site-packages/MySQLdb/__init__.py", line 130, in Connect return Connection(*args, **kwargs) File "/home/airflow/.local/lib/python3.8/site-packages/MySQLdb/connections.py", line 185, in __init__ super().__init__(*args, **kwargs2) sqlalchemy.exc.OperationalError: (MySQLdb._exceptions.OperationalError) (1045, "Access denied for user 'dwhadmin'@'10.xx.xx.xx' (using password: YES)") (Background on this error at: http://sqlalche.me/e/13/e3q8)

[KulykDmytro]

same one on 2.1.4 apache/airflow#18843

[thesuperzapper]

@KulykDmytro @gowdra01 So it looks like it's an upstream airflow issue given apache/airflow#18843?

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.