[Bug 1186310] Re: Zmq raises timeout on cast() if no topic consumers

[Mathew Hodson]

** No longer affects: oslo.messaging (Ubuntu Wily)

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https://bugs.launchpad.net/bugs/1186310

Title:
  Zmq raises timeout on cast() if no topic consumers

Status in oslo.messaging:
  Fix Released
Status in oslo.messaging package in Ubuntu:
  Fix Released
Status in oslo.messaging source package in Vivid:
  Fix Released

Bug description:
  The RpcTimeout exception is raised if the matchmaker cannot find any
  consumers for a topic. This is common if there are no consumers.

  While this might be legitimate and even expected for call(), it seems
  likely that delivery failures should be ignored for cast().

  There is at least one case in Nova where a cast is made and does not
  catch this Timeout exception.

  Discovered by Joe Gordon

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