The Airflow BashSensor module is lacking (Airflow#31221, don't look) an append_env parameter so any environment passed to it will overwrite the executor's default environment. In our case, we need the KRB5CCNAME and other Kerberos variables which are set up by our Airflow configuration. I've attempted to wire the DAG parse environment through to the sensor, which works in the development environment, but not in production. What I found is that the credentials cache is set to /tmp/airflow_krb5_ccache/krb5cc in the DAG parse context, but should be /tmp/airflow_krb5_ccache for the executor.

This task is about merging passed task environment with the default executor environment.