Hi @laimsi,
It looks like you probably have an orphaned reserved-resource worker in Pulp 3. It’s a bug that has popped up for some people in the past. The Pulp 3 team has a document for dealing with it. Please try the steps here, in the section I’m linking: Reserved-Resource debugging - HackMD
Keep in mind the Katello caveats that are listed right above the section I linked. pulpcore-manager needs to be run like so from a directory that the pulp user can read and write to (like /tmp for example):
sudo -u pulp PULP_SETTINGS='/etc/pulp/settings.py' DJANGO_SETTINGS_MODULE='pulpcore.app.settings' pulpcore-manager ...