[Bug 52884] "localhost" leads to start failure

[bu...@apache.org]

https://issues.apache.org/bugzilla/show_bug.cgi?id=52884

--- Comment #3 from Joe Orton <jo...@redhat.com> ---
I can reproduce this, it is another weird AI_ADDRCONFIG getaddinfo() thing.

Using people.apache.org/~jorton/gai.c

$ ./gai localhost
getaddrinfo("localhost", NULL, {.family=AF_UNSPEC, .hints=0}) = 0:
 family=10, proto= 6 inet6: addr=::1, port=0, flowinfo=0
 family= 2, proto= 6 inet4: addr=127.0.0.1, port=0
$ ./gai -a localhost
getaddrinfo("localhost", NULL, {.family=AF_UNSPEC, .hints=0|AI_ADDRCONFIG}) =
0:
 family= 2, proto= 6 inet4: addr=127.0.0.1, port=0
 family= 2, proto= 6 inet4: addr=127.0.0.1, port=0

... where /etc/hosts has both "localhost" and "localhost.domain" mapping to
127.0.0.1.

Google says there is some... "disagreement" about whether this is
app/libc/distro problem.  Sigh.  I guess we could work around it in APR by
ignoring duplicate addresses.

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