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[Bhuvan Arumugam <bhuvaneswaran@xxxxxxxxx>]

i couldn't replicate this issue. I was using latest HEAD across all
components.

I think restarting all services had helped.

I'll reopen, if it happen again.

** Changed in: nova
       Status: Incomplete => Invalid

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https://bugs.launchpad.net/bugs/1291100

Title:
  UnsupportedVersion: Endpoint does not support RPC version 3.22

Status in OpenStack Compute (Nova):
  Invalid

Bug description:
  compute log spit this error message. We are unable to delete VMs. They
  are struck at task state "deleting".

  2014-03-11 22:24:32,321 (oslo.messaging.rpc.dispatcher): ERROR dispatcher _dispatch_and_reply Exception during message handling: Endpoint does not support RPC version 3.22
  Traceback (most recent call last):
    File "/usr/local/csi/share/csi-nova.venv/lib/python2.6/site-packages/oslo/messaging/rpc/dispatcher.py", line 133, in _dispatch_and_reply
      incoming.message))
    File "/usr/local/csi/share/csi-nova.venv/lib/python2.6/site-packages/oslo/messaging/rpc/dispatcher.py", line 185, in _dispatch
      raise UnsupportedVersion(version)
  UnsupportedVersion: Endpoint does not support RPC version 3.22
  2014-03-11 22:24:32,322 (oslo.messaging._drivers.common): ERROR common serialize_remote_exception Returning exception Endpoint does not support RPC version 3.22 to caller

  It is likely the regression caused by
  https://github.isg.apple.com/openstack/nova/commit/a7b5b975a48f132afa0fc8717c72ab3cb1f6545a#nova/compute/rpcapi.py,
  wherein the RPC version was bumped to 3.23.

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