c = get_config()
c.LocalControllerLauncher.controller_cmd = ['/usr/bin/python2', '-m',
    'ipyparallel.controller']
c.LocalEngineLauncher.engine_cmd = ['/usr/bin/python2', '-m',
    'ipyparallel.engine']
c.LocalEngineSetLauncher.engine_cmd = ['/usr/bin/python2', '-m',
    'ipyparallel.engine']
Измените IPython 3 для ядра Python 3 на python2 для кластера.