LBAAS HM: 404 within a range of allowed status codes, but still instance removed from the pool

[Slobodan Blatnjak]

When using a range (200-500) for allowed status codes in the lbaas monitor a 404 response removes the instance from the pool.
Setting the status code specifically to 404 does work. (Version 2.21-102)

neutron lb-healthmonitor-create --help
--expected-codes EXPECTED_CODES
                        The list of HTTP status codes expected in response
                        from the member to declare it healthy. This attribute
                        can contain one value, or a list of values separated
                        by comma, or a range of values (e.g. "200-299"). If
                        this attribute is not specified, it defaults to "200".

Please let me know if you need lb-healthmonitor-show or any other output.