ashb commented on issue #4325: [AIRFLOW-3528] handle socket exception with SFTPOperator URL: https://github.com/apache/incubator-airflow/pull/4325#issuecomment-448241004 I guessed at what error it might report. The main thing is you have try-inside-try, so this won't do what you expect. Additionally the error that was reporting was `'NoneType' object has no attribute 'open_sftp'` which means no exception is being thrown, instead `self.ssh_hook.get_conn() as ssh_client` is returning None. So the except you added (capturing `OSError`) won't ever get triggered. Tests :)
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