Strange response with option "minimal-response YES"

[xdong]

Hi all,    My server is a caching-only server, and provides recursive service
with  "minimal-response YES". when i digged some domain name, my server
answered with all fields « ADDITIONAL RECORDS » and « AUTHORITATIVE
NAMESERVERS » fill with the DNS root server. I think this is WRONG and
useless.Just like as following:% dig @127.0.0.1 plaid.princeton.edu. A; <<>>
DiG 9.11.2 <<>> @127.0.0.1 plaid.princeton.edu. A; (1 server found);; global
options: +cmd;; Got answer:;; ->>HEADER<<- opcode: QUERY, status: NOERROR,
id: 4208;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 13, ADDITIONAL:
27;; OPT PSEUDOSECTION:; EDNS: version: 0, flags:; udp: 4096; COOKIE:
fb305a768a4968defdf64dd65a830468abe3a7b146678e56 (good);; QUESTION
SECTION:;plaid.princeton.edu. IN A;; ANSWER SECTION:plaid.Princeton.EDU.
43137 IN A 140.180.226.197;; AUTHORITY SECTION:. 518385 IN NS
l.root-servers.net.. 518385 IN NS f.root-servers.net.. 518385 IN NS
k.root-servers.net.. 518385 IN NS b.root-servers.net.. 518385 IN NS
g.root-servers.net.. 518385 IN NS j.root-servers.net.. 518385 IN NS
h.root-servers.net.. 518385 IN NS d.root-servers.net.. 518385 IN NS
i.root-servers.net.. 518385 IN NS a.root-servers.net.. 518385 IN NS
e.root-servers.net.. 518385 IN NS m.root-servers.net.. 518385 IN NS
c.root-servers.net.;; ADDITIONAL SECTION:a.root-servers.net. 604785 IN A
198.41.0.4b.root-servers.net. 604785 IN A 199.9.14.201c.root-servers.net.
604785 IN A 192.33.4.12d.root-servers.net. 604785 IN A
199.7.91.13e.root-servers.net. 604785 IN A 192.203.230.10f.root-servers.net.
604785 IN A 192.5.5.241g.root-servers.net. 604785 IN A
192.112.36.4h.root-servers.net. 604785 IN A 198.97.190.53i.root-servers.net.
604785 IN A 192.36.148.17j.root-servers.net. 604785 IN A
192.58.128.30k.root-servers.net. 604785 IN A 193.0.14.129l.root-servers.net.
604785 IN A 199.7.83.42m.root-servers.net. 604785 IN A
202.12.27.33a.root-servers.net. 604785 IN AAAA
2001:503:ba3e::2:30b.root-servers.net. 604785 IN AAAA
2001:500:200::bc.root-servers.net. 604785 IN AAAA
2001:500:2::cd.root-servers.net. 604785 IN AAAA
2001:500:2d::de.root-servers.net. 604785 IN AAAA
2001:500:a8::ef.root-servers.net. 604785 IN AAAA
2001:500:2f::fg.root-servers.net. 604785 IN AAAA
2001:500:12::d0dh.root-servers.net. 604785 IN AAAA
2001:500:1::53i.root-servers.net. 604785 IN AAAA
2001:7fe::53j.root-servers.net. 604785 IN AAAA
2001:503:c27::2:30k.root-servers.net. 604785 IN AAAA
2001:7fd::1l.root-servers.net. 604785 IN AAAA
2001:500:9f::42m.root-servers.net. 604785 IN AAAA 2001:dc3::35;; Query time:
1 msec;; SERVER: 127.0.0.1#53(127.0.0.1);; WHEN: Tue Feb 13 10:29:44 EST
2018;; MSG SIZE rcvd: 894So, i want to know why this happened? Anybody can
help me ?



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