luci fails to start with error "TypeError: serve() got an unexpected keyword argument" in RHEL 6

Issue

• I unable to start luci on one of the cluster node in two node cluster and showing No PID file /var/run/luci/luci.pid

  # service luci start
  Start luci...                                              [  OK  ]
  Point your web browser to https://node1.example.com:8084 (or equivalent) to access luci
  # service luci status
  No PID file /var/run/luci/luci.pid
  

• There is an error in /var/log/luci/luci.log

  /usr/lib/python2.6/site-packages/tw/core/view.py:223: DeprecationWarning: object.__new__() takes no parameters
    obj = object.__new__(cls, *args, **kw)
  Starting server in PID 37556.
  Traceback (most recent call last):
    File "/usr/bin/paster", line 9, in <module>
      load_entry_point('PasteScript==1.7.3', 'console_scripts', 'paster')()
    File "/usr/lib/python2.6/site-packages/paste/script/command.py", line 84, in run
      invoke(command, command_name, options, args[1:])
    File "/usr/lib/python2.6/site-packages/paste/script/command.py", line 123, in invoke
      exit_code = runner.run(args)
    File "/usr/lib/python2.6/site-packages/paste/script/command.py", line 218, in run
      result = self.command()
    File "/usr/lib/python2.6/site-packages/paste/script/serve.py", line 303, in command
      serve()
    File "/usr/lib/python2.6/site-packages/paste/script/serve.py", line 287, in serve
      server(app)
    File "/usr/lib/python2.6/site-packages/paste/deploy/loadwsgi.py", line 151, in server_wrapper
      **context.local_conf)
    File "/usr/lib/python2.6/site-packages/paste/deploy/util/fixtypeerror.py", line 57, in fix_call
      val = callable(*args, **kw)
    File "/usr/lib/python2.6/site-packages/paste/httpserver.py", line 1342, in server_runner
      serve(wsgi_app, **kwargs)
  TypeError: serve() got an unexpected keyword argument 'node'
  Removing PID file /var/run/luci/luci.pid