ServerError: HTTP Error 503: Service Unavailable

https://sentry.softwareheritage.org/organizations/swh/issues/8957/?referrer=phabricator_plugin

ServerError: HTTP Error 503: Service Unavailable
Response headers:
---
-content-encoding: gzip
connection: close
content-length: 8853
content-type: text/html;charset=utf-8
date: Thu, 17 Feb 2022 16:12:07 GMT
retry-after: 900
server: gunicorn/19.8.1
status: 503
transfer-encoding: chunked
vary: Accept-Encoding
x-lazr-oopsid: OOPS-e02499c5508ff53b1c84c438c3967f66
x-powered-by: Zope (www.zope.org), Python (www.python.org)
x-request-id: 99494c7e-ca84-4deb-89bd-34f54f57cb8d
x-vcs-revision: 131c1c72b6032652fb002ebff08e63a8d...
(3 additional frame(s) were not displayed)
...
  File "swh/core/utils.py", line 47, in grouper
    for _data in itertools.zip_longest(*args, fillvalue=stop_value):
  File "swh/lister/launchpad/lister.py", line 153, in get_origins_from_page
    for repo in repos:
  File "/usr/lib/python3/dist-packages/lazr/restfulclient/resource.py", line 832, in __iter__
    next_get = self._root._browser.get(URI(next_link))
  File "/usr/lib/python3/dist-packages/lazr/restfulclient/_browser.py", line 448, in get
    response, content = self._request(url, extra_headers=headers)
  File "/usr/lib/python3/dist-packages/lazr/restfulclient/_browser.py", line 438, in _request
    raise error

---

Migrated from T3948 (view on Phabricator)