Ceph » RADOS

This is caused because the exception class inherits from parent classes that do not define any keyword arguments

$ ceph osd --help
...
server name not found: 192.168.111. (Name or service not known)
unable to parse addrs in '192.168.111.'
InvalidArgumentError does not take keyword arguments

But the error handling in `rados.pyx` uses `errno_to_exception` that will pass the message and the errno:

        return errno_to_exception[ret](msg, errno=ret)