创建的卷挂载不成功Required RPC API version is 3.1

大神，您好！

下面是在挂载卷时，cinder节点上volume.log报的错误

2017-04-11 20:17:02.629 24679 WARNING cinder.manager [req-b71dffef-8cb2-45a6-a18d-ee7154300014 - - - - -] Failed to notify about cinder-volume service capabilities for host cinder@lvm. This is normal during a live upgrade. Error: One of cinder-scheduler services is too old to accept notify_service_capabilities request. Required RPC API version is 3.1. Are you running mixed versions of cinder-schedulers?

2017-04-11 20:17:02.789 24679 INFO cinder.volume.manager [req-c93dd6e1-6776-409e-a591-784825c1bb6d - - - - -] Initialize volume connection completed successfully.

2017-04-11 20:17:04.934 24679 INFO cinder.volume.manager [req-28a0b6c6-1f8e-43ff-9a5a-a6e4f7465239 - - - - -] Terminate volume connection completed successfully.

2017-04-11 20:18:02.632 24679 WARNING cinder.manager [req-b71dffef-8cb2-45a6-a18d-ee7154300014 - - - - -] Failed to notify about cinder-volume service capabilities for host cinder@lvm. This is normal during a live upgrade. Error: One of cinder-scheduler services is too old to accept notify_service_capabilities request. Required RPC API version is 3.1. Are you running mixed versions of cinder-schedulers?

希望可以给与帮助,谢谢！RPC API 该怎么更新呢？