feature request: warn when domain name resolves to several addresses

Roger Pack rogerdpack2 at gmail.com
Tue Nov 19 17:47:01 UTC 2019

I noticed that in ngx_http_proxy_module

proxy_pass http://localhost:8000/uri/;
"If a domain name resolves to several addresses, all of them will be
used in a round-robin fashion. In addition, an address can be
specified as a server group."

However this can be confusing for end users who innocently put the
domain name "localhost" then find that round-robin across ipv6 and
ipv4 is occurring, ref:

Suggestion/feature request: If a domain name resolves to several
addresses, log a warning in error.log file somehow, or at least in the
output of -T, to warn  somehow.  Then there won't be unexpected
round-robins occurring and "supposedly single" servers being
considered unavailable due to timeouts, surprising people like myself.

Thank you for your attention, and for nginx, it's rocking fast! :)

-Roger Pack-

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