bzr 无法连接 SSH 主机（因 Python？）

Question

直到今天，我一直可以使用 bzr pull server:path/to/trunk 这个命令，但今天却出现了一个错误：

Unable to connect to SSH host server; EOF during negotiation

目前还不清楚为什么会出现这个错误，不过这是从 ~/.bzr.log 文件中得到的错误追踪信息。

有没有人知道怎么解决这个问题？

Mon 2011-02-21 16:36:04 -0600
0.022  bazaar version: 2.1.1
0.022  bzr arguments: [u'pull']
0.026  looking for plugins in /home/user/.bazaar/plugins
0.026  looking for plugins in /usr/lib/python2.6/dist-packages/bzrlib/plugins
0.062  encoding stdout as sys.stdout encoding 'UTF-8'
0.133  opening working tree '/home/user/pecan'
0.178  ssh implementation is OpenSSH
0.697  Traceback (most recent call last):
  File "/usr/lib/python2.6/dist-packages/bzrlib/commands.py", line 853, in exception_to_return_code
    return the_callable(*args, **kwargs)
  File "/usr/lib/python2.6/dist-packages/bzrlib/commands.py", line 1055, in run_bzr
    ret = run(*run_argv)
  File "/usr/lib/python2.6/dist-packages/bzrlib/commands.py", line 661, in run_argv_aliases
    return self.run_direct(**all_cmd_args)
  File "/usr/lib/python2.6/dist-packages/bzrlib/commands.py", line 665, in run_direct
    return self._operation.run_simple(*args, **kwargs)
  File "/usr/lib/python2.6/dist-packages/bzrlib/cleanup.py", line 122, in run_simple
    self.cleanups, self.func, *args, **kwargs)
  File "/usr/lib/python2.6/dist-packages/bzrlib/cleanup.py", line 156, in _do_with_cleanups
    result = func(*args, **kwargs)
  File "/usr/lib/python2.6/dist-packages/bzrlib/builtins.py", line 993, in run
    possible_transports=possible_transports)
  File "/usr/lib/python2.6/dist-packages/bzrlib/branch.py", line 169, in open
    possible_transports=possible_transports)
  File "/usr/lib/python2.6/dist-packages/bzrlib/bzrdir.py", line 843, in open
    return BzrDir.open_from_transport(t, _unsupported=_unsupported)
  File "/usr/lib/python2.6/dist-packages/bzrlib/bzrdir.py", line 873, in open_from_transport
    redirected)
  File "/usr/lib/python2.6/dist-packages/bzrlib/transport/__init__.py", line 1644, in do_catching_redirections
    return action(transport)
  File "/usr/lib/python2.6/dist-packages/bzrlib/bzrdir.py", line 860, in find_format
    transport, _server_formats=_server_formats)
  File "/usr/lib/python2.6/dist-packages/bzrlib/bzrdir.py", line 1820, in find_format
    return format.probe_transport(transport)
  File "/usr/lib/python2.6/dist-packages/bzrlib/bzrdir.py", line 1830, in probe_transport
    format_string = transport.get_bytes(".bzr/branch-format")
  File "/usr/lib/python2.6/dist-packages/bzrlib/transport/sftp.py", line 435, in get_bytes
    f = self.get(relpath)
  File "/usr/lib/python2.6/dist-packages/bzrlib/transport/sftp.py", line 425, in get
    f = self._get_sftp().file(path, mode='rb')
  File "/usr/lib/python2.6/dist-packages/bzrlib/transport/sftp.py", line 397, in _get_sftp
    connection, credentials = self._create_connection()
  File "/usr/lib/python2.6/dist-packages/bzrlib/transport/sftp.py", line 389, in _create_connection
    self._host, self._port)
  File "/usr/lib/python2.6/dist-packages/bzrlib/transport/ssh.py", line 376, in connect_sftp
    self._raise_connection_error(host, port=port, orig_error=e)
  File "/usr/lib/python2.6/dist-packages/bzrlib/transport/ssh.py", line 252, in _raise_connection_error
    orig_error=orig_error)
SocketConnectionError: Unable to connect to SSH host server; EOF during negotiation

0.698  Transferred: 0KiB (0.0K/s r:0K w:0K)
0.698  return code 3

ssh 错误追踪 bzr 连接问题

bzr 无法连接 SSH 主机（因 Python？）

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