Wrong default style when creating layer

[etj]

Sometimes when a layer is created, it's not referencing a brand new style, but has the default geoserver style (either point, polygon, etc).
Anyway, when GeoNode creates the wms calls, the style name is prefixed with geonode:
http://localhost/geoserver/ows?SERVICE=WMS&VERSION=1.3.0&REQUEST=GetMap&FORMAT=image%2Fpng&TRANSPARENT=true&LAYERS=geonode%3Amalga_bb8b47bc672d71cd83776e209c0e2413&STYLES=geonode%3Apoint&SRS=EPSG%3A3857&CRS=EPSG%3A3857&TILED=true&_v_=1663259726834&access_token=yfFDxJAZQbw1ICp4iH3pfQs0DS6mxP&WIDTH=512&HEIGHT=512&BBOX=1252344.271424327%2C5322463.153553393%2C1565430.339280409%2C5635549.2214094745

and geoserver refuses it with this exception:

<ServiceExceptionReport>
   <ServiceException code="StyleNotDefined"> No such style: geonode:point </ServiceException>
</ServiceExceptionReport>

This problem seems to be a race condition, so it's quite complicated to replicate with a vanilla GeoNode.

A setup where this issue is always replicable is using the geonode-import app; when upload a geopackage file, more layers are created at once, so the race condition will happen even with a gpkg with only 2 layers.

Steps to Reproduce the Problem

1. setup a system with geonode-importer
2. upload a gpkg with at least 2 layers
3. --> one of the layers will not be rendered because of the style problem

Specifications

• GeoNode version: 4.0.x
• Installation method: docker

[etj]

Added lot of logs and robustness improvements to find out where the thread would hang.

It came out that all the Locks were created with a id equals to "None"

geonode/geonode/geoserver/tasks.py

Line 149 in 725c2e2

lock_id = f'{self.request.id}'

Creating the lock on the name of the Dataset seems to be solving the issue.

[etj]

Please note that when the None lock was releases, the other thread waiting on the lock did not aquire the lock.