MongoClient opened before fork. Create MongoClient

Support
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1

I’m seeing a lot of errors that look like this:

Feb 5 14:21:06 utils pulp: py.warnings:WARNING: [a12fb24f] (3954-75424) "MongoClient opened before fork. Create MongoClient "

My Katello install is up to date as far as possible: pulp 2.13.4-1; mongodb 2.6.12-6; katello 3.5.0.1; Foreman 1.16.0

Looks very similar to this
Satellite 6:
https://bugzilla.redhat.com/show_bug.cgi?id=1419679

Pulp:
https://pulp.plan.io/issues/2573
https://pulp.plan.io/issues/1655

Any ideas if this is a known issue?