http cannot tunnel smart protocol

[Vincent Ladeuil]

When trying to pqm-submit a patch from a bounded branch, I got the following traceback:

bzr pqm-submit -m '(vila) Trivial test suite fixes'
Checking the working tree is clean ...
Checking that the public branch is up to date ...
bzr: ERROR: bzrlib.errors.NoSmartMedium: The transport '<bzrlib.transport.http._urllib.HttpTransport_urllib url=http://bazaar.launchpad.net/%7Ev-ladeuil/bzr/bzr.integration/>' cannot tunnel the smart protocol.

Traceback (most recent call last):
  File "/v/home/vila/src/bzr/trunk/bzrlib/commands.py", line 834, in run_bzr_catch_errors
    return run_bzr(argv)
  File "/v/home/vila/src/bzr/trunk/bzrlib/commands.py", line 790, in run_bzr
    ret = run(*run_argv)
  File "/v/home/vila/src/bzr/trunk/bzrlib/commands.py", line 492, in run_argv_aliases
    return self.run(**all_cmd_args)
  File "/home/vila/.bazaar/plugins/pqm/__init__.py", line 109, in run
    tree=tree)
  File "/home/vila/.bazaar/plugins/pqm/pqm_submit.py", line 205, in submit
    submission.check_public_branch()
  File "/home/vila/.bazaar/plugins/pqm/pqm_submit.py", line 151, in check_public_branch
    public_revision = Branch.open(self.public_location).last_revision()
  File "/v/home/vila/src/bzr/trunk/bzrlib/branch.py", line 110, in open
    possible_transports=possible_transports)
  File "/v/home/vila/src/bzr/trunk/bzrlib/bzrdir.py", line 651, in open
    return BzrDir.open_from_transport(t, _unsupported=_unsupported)
  File "/v/home/vila/src/bzr/trunk/bzrlib/bzrdir.py", line 693, in open_from_transport
    return format.open(transport, _found=True)
  File "/v/home/vila/src/bzr/trunk/bzrlib/bzrdir.py", line 1554, in open
    return self._open(transport)
  File "/v/home/vila/src/bzr/trunk/bzrlib/bzrdir.py", line 2431, in _open
    return remote.RemoteBzrDir(transport)
  File "/v/home/vila/src/bzr/trunk/bzrlib/remote.py", line 65, in __init__
    self._shared_medium = transport.get_shared_medium()
  File "/v/home/vila/src/bzr/trunk/bzrlib/transport/__init__.py", line 637, in get_shared_medium
    raise errors.NoSmartMedium(self)
NoSmartMedium: The transport '<bzrlib.transport.http._urllib.HttpTransport_urllib url=http://bazaar.launchpad.net/%7Ev-ladeuil/bzr/bzr.integration/>' cannot tunnel the smart protocol.

bzr 1.4dev on python 2.5.1 (linux2)
arguments: ['/home/vila/bin/bzr', 'pqm-submit', '-m', '(vila) Trivial test suite fixes']
encoding: 'UTF-8', fsenc: 'UTF-8', lang: 'en_US.UTF-8'
plugins:
  bzrtools /home/vila/.bazaar/plugins/bzrtools [1.3.0]
  defaultToUrllib /home/vila/.bazaar/plugins/defaultToUrllib [unknown]
  diffstat /home/vila/.bazaar/plugins/diffstat [unknown]
  difftools /home/vila/.bazaar/plugins/difftools [0.91.0]
  email /home/vila/.bazaar/plugins/email [unknown]
  grep /home/vila/.bazaar/plugins/grep [unknown]
  gtk /home/vila/.bazaar/plugins/gtk [0.94.0dev0]
  heads /home/vila/.bazaar/plugins/heads [unknown]
  hgrep /home/vila/.bazaar/plugins/hgrep [unknown]
  launchpad /v/home/vila/src/bzr/trunk/bzrlib/plugins/launchpad [unknown]
  loom /home/vila/.bazaar/plugins/loom [1.4.0dev0]
  multiparent /v/home/vila/src/bzr/trunk/bzrlib/plugins/multiparent.pyc [unknown]
  pqm /home/vila/.bazaar/plugins/pqm [1.3.0dev0]
  stats /home/vila/.bazaar/plugins/stats [unknown]
  transportstats /home/vila/.bazaar/plugins/transportstats [unknown]
  upload /home/vila/.bazaar/plugins/upload [unknown]
  usertest /home/vila/.bazaar/plugins/usertest [unknown]
*** Bazaar has encountered an internal error.
    Please report a bug at https://bugs.launchpad.net/bzr/+filebug
    including this traceback, and a description of what you
    were doing when the error occurred.

Using bzr.dev@3308 avoid the problem.

I apologize for not diagnosing it further, but my first bet is on rev 3309: Move smart protocol version query logic into the medium, so that we no longer make redundant version queries. (Andrew Bennetts).
The second bet (very lower) being on rev 3315: (jam) avoid opening the master branch during update when it isn't used.

[Vincent Ladeuil (vila)]

I forgot to mention the setup:

bzr info
Repository checkout (format: pack-0.92)
Location:
  repository checkout root: .
        checkout of branch: sftp://<email address hidden>/%7Ev-ladeuil/bzr/bzr.integration/
         shared repository: /v/home/vila/src/bzr

Related branches:
  public branch: http://bazaar.launchpad.net/~v-ladeuil/bzr/bzr.integration/
    push branch: sftp://<email address hidden>/%7Ev-ladeuil/bzr/bzr.integration/
  parent branch: http://bazaar-vcs.org/bzr/bzr.dev/
  submit branch: http://bazaar-vcs.org/bzr/bzr.dev

I.e. I don't *use* bzr+http, only http.

[Sabin Iacob (iacobs)]

also happens to me when trying to branch from launchpad:

web tmp # bzr branch lp:bzr-svn bzr-svn
bzr: ERROR: bzrlib.errors.NoSmartMedium: The transport '<bzrlib.transport.http._urllib.HttpTransport_urllib url=http://bazaar.launchpad.net/%7Ejelmer/bzr-svn/0.4/>' cannot tunnel the smart protocol.

Traceback (most recent call last):
  File "/usr/lib/python2.4/site-packages/bzrlib/commands.py", line 834, in run_bzr_catch_errors
    return run_bzr(argv)
  File "/usr/lib/python2.4/site-packages/bzrlib/commands.py", line 790, in run_bzr
    ret = run(*run_argv)
  File "/usr/lib/python2.4/site-packages/bzrlib/commands.py", line 492, in run_argv_aliases
    return self.run(**all_cmd_args)
  File "/usr/lib/python2.4/site-packages/bzrlib/builtins.py", line 920, in run
    accelerator_tree, br_from = bzrdir.BzrDir.open_tree_or_branch(
  File "/usr/lib/python2.4/site-packages/bzrlib/bzrdir.py", line 773, in open_tree_or_branch
    bzrdir = klass.open(location)
  File "/usr/lib/python2.4/site-packages/bzrlib/bzrdir.py", line 651, in open
    return BzrDir.open_from_transport(t, _unsupported=_unsupported)
  File "/usr/lib/python2.4/site-packages/bzrlib/bzrdir.py", line 693, in open_from_transport
    return format.open(transport, _found=True)
  File "/usr/lib/python2.4/site-packages/bzrlib/bzrdir.py", line 1554, in open
    return self._open(transport)
  File "/usr/lib/python2.4/site-packages/bzrlib/bzrdir.py", line 2431, in _open
    return remote.RemoteBzrDir(transport)
  File "/usr/lib/python2.4/site-packages/bzrlib/remote.py", line 65, in __init__
    self._shared_medium = transport.get_shared_medium()
  File "/usr/lib/python2.4/site-packages/bzrlib/transport/__init__.py", line 637, in get_shared_medium
    raise errors.NoSmartMedium(self)
NoSmartMedium: The transport '<bzrlib.transport.http._urllib.HttpTransport_urllib url=http://bazaar.launchpad.net/%7Ejelmer/bzr-svn/0.4/>' cannot tunnel the smart protocol.

bzr 1.4dev on python 2.4.4 (linux2)
arguments: ['/usr/bin/bzr', 'branch', 'lp:bzr-svn', 'bzr-svn']
encoding: 'ANSI_X3.4-1968', fsenc: 'ANSI_X3.4-1968', lang: None
plugins:
  bzrtools /usr/lib/python2.4/site-packages/bzrlib/plugins/bzrtools [1.1.0]
  launchpad /usr/lib/python2.4/site-packages/bzrlib/plugins/launchpad [unknown]
  multiparent /usr/lib/python2.4/site-packages/bzrlib/plugins/multiparent.py [unknown]
*** Bazaar has encountered an internal error.
    Please report a bug at https://bugs.launchpad.net/bzr/+filebug
    including this traceback, and a description of what you
    were doing when the error occurred.

[Sabin Iacob (iacobs)]

it is probably r3309, reverted to 3308 and it doesn't happen any more (tried 3314 and had the same problem)

[Andrew Bennetts (spiv)]

Sabin, your problem is bug 207558.

It's possible, even likely, that vila's original report in this bug is also a dupe of that bug, although I'm not certain off the top of my head. It's certainly a bug revealed by the same revision, 3309, which enabled auto-probing for a smart server when using http:// URLs.

[Sabin Iacob (iacobs)]

The crashes seem to originate from the same code, so it's quite likely that this is a dupe. I would suggest changing the summary line on bug 207558, just in case anyone else will search for it (I looked for the error message, i.e. "cannot tunnel smart protocol").