neutron-server and keystone fail to stop with error message: "AssertionError: Calling waitall() from within one of the GreenPool's greenthreads will never terminate."

Solution Verified - Updated -

Issue

What problem/issue/behavior are you having trouble with? What do you expect to see?

When pacemaker noticed that the rabbitmq-server monitor timed out, it tried to restart the rabbitmq-server and the resources that depends on the rabbitmq, but neutron-server died with the following error message:

AssertionError: Calling waitall() from within one of the GreenPool's greenthreads will never terminate.

Environment

  • Red Hat OpenStack 6.0
  • neutron
  • keystone

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