psycopg2 could not translate host name : <p>My airflow server periodically fails. When I check the gunicorn logs, the error before all works shutting down looks like this:</p>

<p><code>
OperationalError: (psycopg2.OperationalError) could not translate host name "my-airflow-db.l9zijaslosu.us-east-1.rds.amazonaws.com" to address: Name or service not known
 (Background on this error at: http://sqlalche.me/e/e3q8)
</code></p>

<p>I immediately verify that the host name is correct and the database is accepting requests from other tools.</p>

<p>If I restart the Ariflow webserver, the the server operates correctly for 4-5 days, and then the same error occurs.</p>

<p>This issue has been asked before but is typically resolve by telling other developers to not use localhost or postrgres host names. My host name is a fully qualified host name on AWS's domain. It seems exceedingly unlikely that this is a DNS error on Amazon's part.</p>
