Expecting value - Error on import

[metalcated]

2021-02-06 08:06:19,956 :: DEBUG :: https://foreman.domain.com:443 "GET /katello/api/v2/errata?per_page=99999 HTTP/1.1" 200 115
2021-02-06 08:06:19,963 :: DEBUG :: Starting new HTTPS connection (1): foreman.domain.com:443
2021-02-06 08:07:20,066 :: DEBUG :: https://foreman.domain.com:443 "GET /katello/api/v2/packages?per_page=99999 HTTP/1.1" 502 425
Traceback (most recent call last):
  File "./centos-errata-katello-importer.py", line 117, in <module>
    rpms = katello.get_repository_packages(all_repositories[repo_release][repo]['id'])
  File "/usr/scripts/katello-centos-errata-import/modules/katelloerrata/katello.py", line 97, in get_repository_packages
    return(self._get_json('packages', data, None))
  File "/usr/scripts/katello-centos-errata-import/modules/katelloerrata/katello.py", line 61, in _get_json
    return r.json()
  File "/usr/lib/python3.6/site-packages/requests/models.py", line 898, in json
    return complexjson.loads(self.text, **kwargs)
  File "/usr/lib64/python3.6/json/__init__.py", line 354, in loads
    return _default_decoder.decode(s)
  File "/usr/lib64/python3.6/json/decoder.py", line 339, in decode
    obj, end = self.raw_decode(s, idx=_w(s, 0).end())
  File "/usr/lib64/python3.6/json/decoder.py", line 357, in raw_decode
    raise JSONDecodeError("Expecting value", s, err.value) from Nonejson.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)

[steve--d]

Similar issue on Katello 3.17, we were a few versions behind and got up to 3.17 and noticed new security updates were not available for the last week - did you find a solution @metalcated ?

Edit: the underlying issue was the apache proxy was timing out the request, default is 60 seconds and first run after an update was ~8.5 minutes to retrieve /katello/api/v2/errata?per_page=99999 on our system.