---
fixes:
  - Ironic exceptions that contained arbitrary objects in kwargs and were sent
    via RPC were causing oslo_messaging serializer to fail. This was leading
    to 500 errors from ironic API, timing out waiting for response from the
    conductor. Starting with this release, all non-serializable objects
    contained in an exception's kwargs are dropped. If the error is going to
    be returned by the service will depend on the configuration option
    ``[DEFAULT]fatal_exception_format_errors``.