[Bug 2138792] Re: [Ubuntu26.04] [FW1110] : Installer crashes while trying to "Update the Installer" with ConnectionRefusedError!

[Frank Heimes]

** Package changed: debian-installer (Ubuntu) => subiquity (Ubuntu)

** Also affects: ubuntu-power-systems
   Importance: Undecided
       Status: New

** No longer affects: subiquity (Ubuntu)

** Changed in: ubuntu-power-systems
     Assignee: (unassigned) => Ubuntu on IBM Power Systems Bug Triage (ubuntu-power-triage)

** Changed in: ubuntu-power-systems
   Importance: Undecided => Medium

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Title:
  [Ubuntu26.04] [FW1110] : Installer crashes while trying to "Update the
  Installer" with ConnectionRefusedError!

Status in subiquity:
  New
Status in The Ubuntu-power-systems project:
  New

Bug description:
  == Comment: #0 - Anushree Mathur <Anushree.Mathur2 at ibm.com> - 2026-01-13 23:52:27 ==
  OS : Ubuntu26.04
  When I am trying to install the host or guest I get the option in the installer as: 

                          [ Update to the new installer ]
                          [ Continue without updating   ]
                          [ Back                        ]

  I chose "Update to the new installer" option and after sometime when I
  pressed enter it crashed with the following trace.

  connecting...
  generating crash report
  report saved to /var/crash/1768367924.892252207.ui.crash
  Traceback (most recent call last):
    File "/snap/subiquity/6911/usr/lib/python3/dist-packages/aiohttp/connector.py", line 1412, in _create_connection
      _, proto = await self._loop.create_unix_connection(
                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    File "/snap/subiquity/6911/usr/lib/python3.12/asyncio/unix_events.py", line 261, in create_unix_connection
      await self.sock_connect(sock, path)
    File "/snap/subiquity/6911/usr/lib/python3.12/asyncio/selector_events.py", line 651, in sock_connect
      return await fut
             ^^^^^^^^^
    File "/snap/subiquity/6911/usr/lib/python3.12/asyncio/selector_events.py", line 659, in _sock_connect
      sock.connect(address)
  ConnectionRefusedError: [Errno 111] Connection refused

  The above exception was the direct cause of the following exception:

  Traceback (most recent call last):
    File "/snap/subiquity/6911/usr/bin/subiquity", line 8, in <module>
      sys.exit(main())
               ^^^^^^
    File "/snap/subiquity/6911/lib/python3.12/site-packages/subiquity/cmd/tui.py", line 161, in main
      asyncio.run(run_with_loop())
    File "/snap/subiquity/6911/usr/lib/python3.12/asyncio/runners.py", line 194, in run
      return runner.run(main)
             ^^^^^^^^^^^^^^^^
    File "/snap/subiquity/6911/usr/lib/python3.12/asyncio/runners.py", line 118, in run
      return self._loop.run_until_complete(task)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    File "/snap/subiquity/6911/usr/lib/python3.12/asyncio/base_events.py", line 687, in run_until_complete
      return future.result()
             ^^^^^^^^^^^^^^^
    File "/snap/subiquity/6911/lib/python3.12/site-packages/subiquity/cmd/tui.py", line 159, in run_with_loop
      await subiquity_interface.run()
    File "/snap/subiquity/6911/lib/python3.12/site-packages/subiquity/client/client.py", line 426, in run
      await super().run()
    File "/snap/subiquity/6911/lib/python3.12/site-packages/subiquitycore/tui.py", line 390, in run
      await super().run()
    File "/snap/subiquity/6911/lib/python3.12/site-packages/subiquitycore/core.py", line 133, in run
      raise exc
    File "/snap/subiquity/6911/lib/python3.12/site-packages/subiquity/ui/views/help.py", line 433, in get_ssh_info_and_redraw
      await self._get_ssh_info()
    File "/snap/subiquity/6911/lib/python3.12/site-packages/subiquity/ui/views/help.py", line 426, in _get_ssh_info
      self.ssh_info = await self.app.wait_with_text_dialog(
                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    File "/snap/subiquity/6911/lib/python3.12/site-packages/subiquitycore/tui.py", line 206, in wait_with_text_dialog
      return await self._wait_with_indication(awaitable, show_load, hide_load)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    File "/snap/subiquity/6911/lib/python3.12/site-packages/subiquitycore/tui.py", line 166, in _wait_with_indication
      result = await awaitable
               ^^^^^^^^^^^^^^^
    File "/snap/subiquity/6911/lib/python3.12/site-packages/subiquity/common/api/client.py", line 75, in impl
      async with make_request(
    File "/snap/subiquity/6911/usr/lib/python3.12/contextlib.py", line 210, in __aenter__
      return await anext(self.gen)
             ^^^^^^^^^^^^^^^^^^^^^
    File "/snap/subiquity/6911/lib/python3.12/site-packages/subiquity/common/api/client.py", line 151, in make_request
      async with session.request(
    File "/snap/subiquity/6911/usr/lib/python3/dist-packages/aiohttp/client.py", line 1187, in __aenter__
      self._resp = await self._coro
                   ^^^^^^^^^^^^^^^^
    File "/snap/subiquity/6911/usr/lib/python3/dist-packages/aiohttp/client.py", line 574, in _request
      conn = await self._connector.connect(
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    File "/snap/subiquity/6911/usr/lib/python3/dist-packages/aiohttp/connector.py", line 544, in connect
      proto = await self._create_connection(req, traces, timeout)
              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    File "/snap/subiquity/6911/usr/lib/python3/dist-packages/aiohttp/connector.py", line 1418, in _create_connection
      raise UnixClientConnectorError(self.path, req.connection_key, exc) from exc
  aiohttp.client_exceptions.UnixClientConnectorError: Cannot connect to unix socket /run/subiquity/socket ssl:default [Connection refused]

  Ubuntu Resolute Raccoon (development branch) ubuntu-server hvc0

  
  After this it comes back to the installer and then it won't ask this option again to update the installer and the installation proceeds fine.

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