Daniel Standish created AIRFLOW-4134:
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Summary: DB connection invalidated warning at every zombie check
Key: AIRFLOW-4134
URL: https://issues.apache.org/jira/browse/AIRFLOW-4134
Project: Apache Airflow
Issue Type: Bug
Affects Versions: 1.10.2
Reporter: Daniel Standish
I am finding with 1.10.2 that I seem to get a warning {{DB connection
invalidated. Reconnecting...}} very frequently.
I to try to diagnose I added logging of the triggering error on line 79 in
airflow/utils/sqlalchemy.py, from which this warning is generated.
Here's the traceback:
{code}
webserver_1 | Traceback (most recent call last):
webserver_1 | File
"/usr/local/lib/python3.6/site-packages/airflow/utils/sqlalchemy.py", line 68,
in ping_connection
webserver_1 | connection.scalar(select([1]))
webserver_1 | File
"/usr/local/lib/python3.6/site-packages/sqlalchemy/engine/base.py", line 912,
in scalar
webserver_1 | return self.execute(object_, *multiparams, **params).scalar()
webserver_1 | File
"/usr/local/lib/python3.6/site-packages/sqlalchemy/engine/base.py", line 980,
in execute
webserver_1 | return meth(self, multiparams, params)
webserver_1 | File
"/usr/local/lib/python3.6/site-packages/sqlalchemy/sql/elements.py", line 273,
in _execute_on_connection
webserver_1 | return connection._execute_clauseelement(self, multiparams,
params)
webserver_1 | File
"/usr/local/lib/python3.6/site-packages/sqlalchemy/engine/base.py", line 1099,
in _execute_clauseelement
webserver_1 | distilled_params,
webserver_1 | File
"/usr/local/lib/python3.6/site-packages/sqlalchemy/engine/base.py", line 1240,
in _execute_context
webserver_1 | e, statement, parameters, cursor, context
webserver_1 | File
"/usr/local/lib/python3.6/site-packages/sqlalchemy/engine/base.py", line 1458,
in _handle_dbapi_exception
webserver_1 | util.raise_from_cause(sqlalchemy_exception, exc_info)
webserver_1 | File
"/usr/local/lib/python3.6/site-packages/sqlalchemy/util/compat.py", line 296,
in raise_from_cause
webserver_1 | reraise(type(exception), exception, tb=exc_tb, cause=cause)
webserver_1 | File
"/usr/local/lib/python3.6/site-packages/sqlalchemy/util/compat.py", line 276,
in reraise
webserver_1 | raise value.with_traceback(tb)
webserver_1 | File
"/usr/local/lib/python3.6/site-packages/sqlalchemy/engine/base.py", line 1236,
in _execute_context
webserver_1 | cursor, statement, parameters, context
webserver_1 | File
"/usr/local/lib/python3.6/site-packages/sqlalchemy/engine/default.py", line
536, in do_execute
webserver_1 | cursor.execute(statement, parameters)
webserver_1 | sqlalchemy.exc.OperationalError: (psycopg2.OperationalError)
server closed the connection unexpectedly
webserver_1 | This probably means the server terminated abnormally
webserver_1 | before or while processing the request.
webserver_1 | [SQL: 'SELECT 1'] (Background on this error at:
http://sqlalche.me/e/e3q8)
{code}
I am not sure where to go from here. But something must be wrong.
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