New remote datasets are not registered inside proxy allowed hosts when GeoNode runs asynchoronously

[giohappy]

The link post save signal should register new remote datasets (3dtiles) inside the proxy allowed hosts registry.
This works fine when run sync but fails when run asynchronously. A restart of the GeoNode instance is required for the registry to pick up the new Link URLs.

Something is wrong here probably due to the async process still running.

[mattiagiupponi]

After few analysis, the missing registration is due the fact that the signal is handled async: so in celery we have the hostname registered as expected:

While in django is not, because celery is running in a different thread:

We should have a persisted or shared cache for this information