[Bug 1320306] Re: udm immediately sends a 'canceled' signal

[Barry Warsaw]

I'm seeing this problem in system-image trunk tests.   Any test that
starts a group download will first get the `started` signal from udm as
expected, then immediately get the `canceled` signal, which stops the
reactor and thus we never see the downloaded files.  This seems like a
serious regression in udm.

** Summary changed:

- system-image-cli failing on goldfish (utopic image 28)
+ udm immediately sends a 'canceled' signal

** Changed in: ubuntu-download-manager
   Importance: Undecided => Critical

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Title:
  udm immediately sends a 'canceled' signal

Status in Ubuntu Download Manager:
  New
Status in Ubuntu system image (server/client/updater):
  New
Status in “system-image” package in Ubuntu:
  New

Bug description:
  I'm getting unhappy errors trying to upgrade a goldfish emulator
  instance using system-image.  If I try to update from the UI, I get a
  'Credentials not found / Please log into your Ubuntu One account'
  message that I've never seen before; if I try to do it from the
  commandline, I get the following:

  root at ubuntu-phablet:~# system-image-cli --build 0 -c devel-proposed -v
  [systemimage] May 16 17:22:20 2014 (14702) running state machine [devel-proposed/generic]
  [systemimage] May 16 17:22:20 2014 (14702) No valid image master key found, downloading
  [systemimage] May 16 17:22:24 2014 (14702) [0x7624b510] Requesting group download:
  	https://system-image.ubuntu.com/gpg/image-master.tar.xz -> /android/cache/recovery/keyring.tar.xz
  	https://system-image.ubuntu.com/gpg/image-master.tar.xz.asc -> /android/cache/recovery/keyring.tar.xz.asc

  [systemimage] May 16 17:22:25 2014 (14702) [0x7624b510] Running group download reactor
  [systemimage] May 16 17:22:29 2014 (14702) [0x7624b510] Group download reactor done
  [systemimage] May 16 17:22:29 2014 (14702) Reactor canceled
  [systemimage] May 16 17:22:29 2014 (14702) uncaught exception in state machine
  Traceback (most recent call last):
    File "/usr/lib/python3/dist-packages/systemimage/state.py", line 124, in __next__
      step()
    File "/usr/lib/python3/dist-packages/systemimage/state.py", line 201, in _get_blacklist_1
      'image-master', 'gpg/image-master.tar.xz', 'archive-master')
    File "/usr/lib/python3/dist-packages/systemimage/keyring.py", line 107, in get_keyring
      (ascxz_src, ascxz_dst),
    File "/usr/lib/python3/dist-packages/systemimage/download.py", line 228, in get_files
      raise Canceled
  systemimage.download.Canceled
  [systemimage] May 16 17:22:29 2014 (14702) system-image-cli exception
  Traceback (most recent call last):
    File "/usr/lib/python3/dist-packages/systemimage/main.py", line 240, in main
      list(state)
    File "/usr/lib/python3/dist-packages/systemimage/state.py", line 124, in __next__
      step()
    File "/usr/lib/python3/dist-packages/systemimage/state.py", line 201, in _get_blacklist_1
      'image-master', 'gpg/image-master.tar.xz', 'archive-master')
    File "/usr/lib/python3/dist-packages/systemimage/keyring.py", line 107, in get_keyring
      (ascxz_src, ascxz_dst),
    File "/usr/lib/python3/dist-packages/systemimage/download.py", line 228, in get_files
      raise Canceled
  systemimage.download.Canceled

  the current image is:
  # cat /etc/system-image/channel.ini 
  [service]
  base: system-image.ubuntu.com
  http_port: 80
  https_port: 443
  channel: devel
  build_number: 28
  channel_target: ubuntu-touch/utopic
  version_detail: ubuntu=20140514.1,device=20140513.2,version=28

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