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databases down?

I'm getting OperationalError: (1105, '(proxy) all backends are down') on 2 sites that I'm helping manage, nobody touched anything on our side, it is a temporary problem? or something broken from our part?

The sites are: http://tienda.dominiodelplata.com.ar and http://jjlovaglio.pythonanywhere.com

I have another website on that account that works fine

I'm also testing to read data on django via command line's dumpdata, no problem there

I'm seeing the same error on my site!

The error happens on WSGI service. When I access MySQL database from python manage.py shell, it works just fine.

One of the web servers decided to stop talking to the database. We believe it's related to an ongoing issue we're having with AWS where some DNS lookups just fail for no reason. We have monitoring for whether the database connection on the web servers is working, but it looks like it doesn't trigger for this failure mode. I'll be spending quite a bit of today beefing up the monitoring and trying to work out how to make the database connections more robust against DNS failure.