Thanks for fixing the bug! I think we should not log a warning about this. It is pretty much unavoidable that sometimes the controller will be disconnected from the switch, especially at controller startup. WARN level log messages should be reserved for situations that are likely to indicate a problem. It might make sense to log something at INFO level, but the code for maintaining OpenFlow connections already logs plenty of INFO messages about connecting and disconnecting, so I don't think we really need another one here.
I remove WARN.
Like Mark, I am not sure that the test is necessary.
I optimized the test case.
Will you submit a v2?
https://mail.openvswitch.org/pipermail/ovs-dev/2018-February/344491.html
Thanks, Ben.
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