[Ryu-devel] ArgsAlreadyParsedError in Ryu-manager ver 3.4

[Srini S. <sri...@gm...>]

Hi
I did a git clone of Ryu today (Ryu-manager version 3.4). When I ran the
manager with ryu/topology/switches and ryu/topology/dumper, I got the
ArgsAlreadyParsedError error. I read on the archive that it was fixed
previously. But, looks like there's some issue now.

ubuntu@ubuntu:~/ryu$ ./bin/ryu-manager --verbose --observe-links
ryu/topology/switches ryu/topology/dumper
loading app ryu/topology/switches
Traceback (most recent call last):
  File "./bin/ryu-manager", line 19, in <module>
    main()
  File "/home/ubuntu/ryu/ryu/cmd/manager.py", line 70, in main
    app_mgr.load_apps(app_lists)
  File "/home/ubuntu/ryu/ryu/base/app_manager.py", line 210, in load_apps
    cls = self.load_app(app_cls_name)
  File "/home/ubuntu/ryu/ryu/base/app_manager.py", line 194, in load_app
    mod = utils.import_module(name)
  File "/home/ubuntu/ryu/ryu/utils.py", line 86, in import_module
    __import__(name)
  File "/home/ubuntu/ryu/ryu/topology/switches.py", line 52, in <module>
    help='link discovery: explicitly drop lldp packet in')
  File "/usr/local/lib/python2.7/dist-packages/oslo/config/cfg.py", line
1579, in __inner
    result = f(self, *args, **kwargs)
  File "/usr/local/lib/python2.7/dist-packages/oslo/config/cfg.py", line
1741, in register_cli_opts
    self.register_cli_opt(opt, group, clear_cache=False)
  File "/usr/local/lib/python2.7/dist-packages/oslo/config/cfg.py", line
1583, in __inner
    return f(self, *args, **kwargs)
  File "/usr/local/lib/python2.7/dist-packages/oslo/config/cfg.py", line
1733, in register_cli_opt
    raise ArgsAlreadyParsedError("cannot register CLI option")
oslo.config.cfg.ArgsAlreadyParsedError: arguments already parsed: cannot
register CLI option

When I did a dump of the _args in the code that threw the
ArgsAlreadyParsedError, I saw the following entries in it:
['--verbose', '--observe-links', 'ryu/topology/switches',
'ryu/topology/dumper']

What am I doing wrong? I haven't made any changes after the git pull.

Thanks
Srini.