Unlocking a page raises exception

[jrief]

In djangocms_versioning/admin.py:1276 (unlock_view) the function notify_version_author_version_unlocked is called which itself attempts to send an email to the user owning the lock.

However, if the project configuration does not configure an email backend, then this function can't connect and raises

OSError: [Errno 101] Network is unreachable.

In my opinion, such a network issue shall be logged but not cause an internal server error.

[fsbraun]

And, if no email backend is configured, it should not even try? (I.e. logs are not bloated with failed notifications if none are configured).

[jrief]

In projects settings, set EMAIL_NOTIFICATIONS_FAIL_SILENTLY = True to prevent this.

[fsbraun]

Still, would it not make sense if no email backend is configured to fail silently? Now, you would either have to add the above setting or configure and email backend. Can't we include one pair of batteries?