先电openstack平台创建云主机提示Unexpected API Error.

问题遇到的现象和发生背景

先电openstack平台创建云主机

问题相关代码，请勿粘贴截图

Unexpected API Error. Please report this at http://bugs.launchpad.net/nova/ and attach the Nova API log if possible. <class 'oslo_messaging.exceptions.MessageDeliveryFailure'> (HTTP 500) (Request-ID: req-03505090-0f16-415b-98f5-eff7158f141b)

运行结果及报错内容

Unexpected API Error. Please report this at http://bugs.launchpad.net/nova/ and attach the Nova API log if possible. <class 'oslo_messaging.exceptions.MessageDeliveryFailure'> (HTTP 500) (Request-ID: req-03505090-0f16-415b-98f5-eff7158f141b)