[Bug 2015286] Re: update-manager unusable due to TimeoutError in uaclient

[Renan Rodrigo]

On the Pro Client side, we are about to land functionality that will
help us remove this status call from the updates endpoint, making sure
we aren't making any network request when the updates functionality is
called. There is https://github.com/canonical/ubuntu-pro-
client/issues/2536 about that.

** Bug watch added: github.com/canonical/ubuntu-pro-client/issues #2536
   https://github.com/canonical/ubuntu-pro-client/issues/2536

** Changed in: ubuntu-advantage-tools (Ubuntu)
       Status: New => Triaged

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https://bugs.launchpad.net/bugs/2015286

Title:
  update-manager unusable due to TimeoutError in uaclient

Status in ubuntu-advantage-tools package in Ubuntu:
  Triaged
Status in update-manager package in Ubuntu:
  Fix Released

Bug description:
  On a fairly standard installation of lunar (ie no Ubuntu Pro linked
  etc), the update-manager can become a non-functional window when
  uaclient isn't behaving. This manifests itself in a greyed-out
  'checking for updates' window which doesn't respond to any clicks and
  can only be closed by ending the process in the system-monitor.

  Traceback (most recent call last):
    File "/usr/lib/python3/dist-packages/UpdateManager/backend/InstallBackendAptdaemon.py", line 529, in _on_finished
      self._action_done(
    File "/usr/lib/python3/dist-packages/UpdateManager/backend/__init__.py", line 414, in _action_done
      self.window_main.start_available()
    File "/usr/lib/python3/dist-packages/UpdateManager/UpdateManager.py", line 244, in start_available
      self.refresh_cache()
    File "/usr/lib/python3/dist-packages/UpdateManager/UpdateManager.py", line 456, in refresh_cache
      self._get_ua_security_status()
    File "/usr/lib/python3/dist-packages/UpdateManager/UpdateManager.py", line 280, in _get_ua_security_status
      update_result = updates()
                      ^^^^^^^^^
    File "/usr/lib/python3/dist-packages/uaclient/api/u/pro/packages/updates/v1.py", line 84, in updates
      return _updates(UAConfig())
             ^^^^^^^^^^^^^^^^^^^^
    File "/usr/lib/python3/dist-packages/uaclient/api/u/pro/packages/updates/v1.py", line 88, in _updates
      ua_info = get_ua_info(cfg)
                ^^^^^^^^^^^^^^^^
    File "/usr/lib/python3/dist-packages/uaclient/security_status.py", line 195, in get_ua_info
      status_dict = status(cfg=cfg, show_all=True)
                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    File "/usr/lib/python3/dist-packages/uaclient/status.py", line 380, in status
      response = _unattached_status(cfg)
                 ^^^^^^^^^^^^^^^^^^^^^^^
    File "/usr/lib/python3/dist-packages/uaclient/status.py", line 246, in _unattached_status
      resources = get_available_resources(cfg)
                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    File "/usr/lib/python3/dist-packages/uaclient/contract.py", line 624, in get_available_resources
      resources = client.request_resources()
                  ^^^^^^^^^^^^^^^^^^^^^^^^^^
    File "/usr/lib/python3/dist-packages/uaclient/contract.py", line 71, in request_resources
      resource_response, headers = self.request_url(
                                   ^^^^^^^^^^^^^^^^^
    File "/usr/lib/python3/dist-packages/uaclient/serviceclient.py", line 73, in request_url
      response, headers = util.readurl(
                          ^^^^^^^^^^^^^
    File "/usr/lib/python3/dist-packages/uaclient/util.py", line 322, in readurl
      resp = request.urlopen(req, timeout=timeout)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    File "/usr/lib/python3.11/urllib/request.py", line 216, in urlopen
      return opener.open(url, data, timeout)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    File "/usr/lib/python3.11/urllib/request.py", line 519, in open
      response = self._open(req, data)
                 ^^^^^^^^^^^^^^^^^^^^^
    File "/usr/lib/python3.11/urllib/request.py", line 536, in _open
      result = self._call_chain(self.handle_open, protocol, protocol +
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    File "/usr/lib/python3.11/urllib/request.py", line 496, in _call_chain
      result = func(*args)
               ^^^^^^^^^^^
    File "/usr/lib/python3.11/urllib/request.py", line 1391, in https_open
      return self.do_open(http.client.HTTPSConnection, req,
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    File "/usr/lib/python3.11/urllib/request.py", line 1352, in do_open
      r = h.getresponse()
          ^^^^^^^^^^^^^^^
    File "/usr/lib/python3.11/http/client.py", line 1374, in getresponse
      response.begin()
    File "/usr/lib/python3.11/http/client.py", line 318, in begin
      version, status, reason = self._read_status()
                                ^^^^^^^^^^^^^^^^^^^
    File "/usr/lib/python3.11/http/client.py", line 279, in _read_status
      line = str(self.fp.readline(_MAXLINE + 1), "iso-8859-1")
                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    File "/usr/lib/python3.11/socket.py", line 706, in readinto
      return self._sock.recv_into(b)
             ^^^^^^^^^^^^^^^^^^^^^^^
    File "/usr/lib/python3.11/ssl.py", line 1278, in recv_into
      return self.read(nbytes, buffer)
             ^^^^^^^^^^^^^^^^^^^^^^^^^
    File "/usr/lib/python3.11/ssl.py", line 1134, in read
      return self._sslobj.read(len, buffer)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  TimeoutError: The read operation timed out

  In my opinion any misbehaving of the Ubuntu Pro integration in update-
  manager (in this specific case probably a 'temporary' server issue)
  shouldn't cause update-manager to become dysfunctional, especially to
  those not subscribed to Ubuntu Pro.

  I have recently seen:
  - update-manager unable to install updates for over a month ( LP: #2008280 )
  - this issue,
  - if you turn wi-fi off and open update-manager, then after clicking ok the update-manager window becomes unresponsive ( LP: #2015113 )
  - and undoubtedly there are others to come as this is all without uaclient needing to do anything (ie I have no subscription and lunar is not yet released)

  Please consider how you might make the integration of Ubuntu Pro into
  update-manager more robust, so that any issues in uaclient don't stop
  update-manager from functioning correctly. (ie presumably using a
  try/except around the uaclient call is not unreasonable - you might
  loose track of any errors that are occurring, but keeping update-
  manager working (aka allowing people to install their system updates)
  is a much higher priority)

  Thanks

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