this is because of a version difference between what's on the controller and what's on the storage nodes.
updated the storage nodes to the same as the controller (2014.2-0ubuntu1~cloud0) and the error disappeared.
this is because of a version difference between what's on the controller and what's on the storage nodes.
updated the storage nodes to the same as the controller (2014.2- 0ubuntu1~ cloud0) and the error disappeared.