Public bug reported: For example, from a fresh jammy container:
root@j:~# do-release-upgrade Checking for a new Ubuntu release Could not find the release announcement The server may be overloaded. Or from a fresh noble container: root@n:~# do-release-upgrade -d Checking for a new Ubuntu release Could not find the release announcement The server may be overloaded. This error message corresponds to u-r-u getting a 403 when attempting to reach the release announcement page. Note that at the time of writing, the pages are accessible by browser, curl, etc. but not u-r-u. In fact, requests.get seems to work, but urllib.request.urlopen (which u-r-u uses) gets a 403: root@q:~# python3 Python 3.13.7 (main, Mar 3 2026, 12:19:54) [GCC 15.2.0] on linux Type "help", "copyright", "credits" or "license" for more information. >>> from urllib.request import urlopen >>> root@q:~# python3 Python 3.13.7 (main, Mar 3 2026, 12:19:54) [GCC 15.2.0] on linux Type "help", "copyright", "credits" or "license" for more information. >>> url = >>> "http://archive.ubuntu.com/ubuntu/dists/resolute/main/dist-upgrader-all/current/ReleaseAnnouncement"; >>> from urllib.request import urlopen >>> urlopen(url) Traceback (most recent call last): File "<python-input-2>", line 1, in <module> urlopen(url) ~~~~~~~^^^^^ File "/usr/lib/python3.13/urllib/request.py", line 189, in urlopen return opener.open(url, data, timeout) ~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^ File "/usr/lib/python3.13/urllib/request.py", line 495, in open response = meth(req, response) File "/usr/lib/python3.13/urllib/request.py", line 604, in http_response response = self.parent.error( 'http', request, response, code, msg, hdrs) File "/usr/lib/python3.13/urllib/request.py", line 533, in error return self._call_chain(*args) ~~~~~~~~~~~~~~~~^^^^^^^ File "/usr/lib/python3.13/urllib/request.py", line 466, in _call_chain result = func(*args) File "/usr/lib/python3.13/urllib/request.py", line 613, in http_error_default raise HTTPError(req.full_url, code, msg, hdrs, fp) urllib.error.HTTPError: HTTP Error 403: Forbidden >>> import requests >>> requests.get(url) <Response [200]> This is most likely caused by changes in infrastructure due to recent issues. ** Affects: ubuntu-release-upgrader (Ubuntu) Importance: High Status: Triaged ** Changed in: ubuntu-release-upgrader (Ubuntu) Status: New => Triaged ** Changed in: ubuntu-release-upgrader (Ubuntu) Importance: Undecided => High -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2151246 Title: upgrades from all releases fail to fetch release announcement To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/2151246/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
