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List:       unbound-users
Subject:    "log-servfail: yes" produce strange messages
From:       "A. Schulze via Unbound-users" <unbound-users () nlnetlabs ! nl>
Date:       2019-03-09 19:39:55
Message-ID: 73c62da2-1d72-a50b-20f0-6e501638d5cc () andreasschulze ! de
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Hello,

recently I enabled "log-servfail: yes" and notice messages I find a little bit \
strange:

An empty cache receive it's first query for "andreasschulze.de. A" ...


2019-03-09 20:23:50.366270500 [1552159430] unbound[9110:0] info: start of service \
(unbound 1.9.1rc1). 2019-03-09 20:23:58.583770500 [1552159438] unbound[9110:0] info: \
generate keytag query _ta-4f66. NULL IN 2019-03-09 20:23:58.688137500 [1552159438] \
unbound[9110:0] error: SERVFAIL <m.gtld-servers.net. A IN>: could not fetch \
nameserver at zone gtld-servers.net. 2019-03-09 20:23:58.688178500 [1552159438] \
unbound[9110:0] error: SERVFAIL <d.gtld-servers.net. AAAA IN>: could not fetch \
nameserver at zone gtld-servers.net. 2019-03-09 20:23:58.693592500 [1552159438] \
unbound[9110:0] error: SERVFAIL <i.gtld-servers.net. AAAA IN>: could not fetch \
nameserver at zone gtld-servers.net. 2019-03-09 20:23:58.693986500 [1552159438] \
unbound[9110:0] error: SERVFAIL <k.gtld-servers.net. A IN>: could not fetch \
nameserver at zone gtld-servers.net. 2019-03-09 20:23:58.694066500 [1552159438] \
unbound[9110:0] error: SERVFAIL <g.gtld-servers.net. AAAA IN>: could not fetch \
nameserver at zone gtld-servers.net. 2019-03-09 20:23:58.700833500 [1552159438] \
unbound[9110:0] error: SERVFAIL <m.gtld-servers.net. AAAA IN>: could not fetch \
nameserver at zone gtld-servers.net. 2019-03-09 20:23:58.700897500 [1552159438] \
unbound[9110:0] error: SERVFAIL <i.gtld-servers.net. A IN>: could not fetch \
nameserver at zone gtld-servers.net. 2019-03-09 20:23:58.723718500 [1552159438] \
unbound[9110:0] error: SERVFAIL <b.gtld-servers.net. A IN>: could not fetch \
nameserver at zone gtld-servers.net. 2019-03-09 20:23:58.723751500 [1552159438] \
unbound[9110:0] error: SERVFAIL <j.gtld-servers.net. AAAA IN>: could not fetch \
nameserver at zone gtld-servers.net. 2019-03-09 20:23:58.734740500 [1552159438] \
unbound[9110:0] error: SERVFAIL <h.gtld-servers.net. A IN>: could not fetch \
nameserver at zone gtld-servers.net. 2019-03-09 20:23:58.734771500 [1552159438] \
unbound[9110:0] error: SERVFAIL <f.gtld-servers.net. AAAA IN>: could not fetch \
nameserver at zone gtld-servers.net. 2019-03-09 20:23:58.734772500 [1552159438] \
unbound[9110:0] error: SERVFAIL <e.gtld-servers.net. AAAA IN>: could not fetch \
nameserver at zone gtld-servers.net. 2019-03-09 20:23:58.734860500 [1552159438] \
unbound[9110:0] error: SERVFAIL <c.gtld-servers.net. AAAA IN>: could not fetch \
nameserver at zone gtld-servers.net. 2019-03-09 20:23:58.739873500 [1552159438] \
unbound[9110:0] error: SERVFAIL <de. DNSKEY IN>: request has exceeded the maximum \
dependency depth (eg. nameserver lookup recursion) 2019-03-09 20:23:58.743530500 \
[1552159438] unbound[9110:0] reply: 127.0.0.1 andreasschulze.de. A IN NOERROR \
0.162199 0 62 2019-03-09 20:23:58.743934500 [1552159438] unbound[9110:0] error: \
SERVFAIL <de. DNSKEY IN>: request has exceeded the maximum dependency depth (eg. \
nameserver lookup recursion) 2019-03-09 20:23:58.771714500 [1552159438] \
unbound[9110:0] error: SERVFAIL <k.gtld-servers.net. AAAA IN>: could not fetch \
nameserver at zone gtld-servers.net. 2019-03-09 20:23:58.771747500 [1552159438] \
unbound[9110:0] error: SERVFAIL <h.gtld-servers.net. AAAA IN>: could not fetch \
nameserver at zone gtld-servers.net. 2019-03-09 20:23:58.771994500 [1552159438] \
unbound[9110:0] error: SERVFAIL <denic.de. DNSKEY IN>: request has exceeded the \
maximum dependency depth (eg. nameserver lookup recursion) 2019-03-09 \
20:23:58.775346500 [1552159438] unbound[9110:0] error: SERVFAIL <denic.de. DNSKEY \
IN>: request has exceeded the maximum dependency depth (eg. nameserver lookup \
recursion) 2019-03-09 20:23:58.775506500 [1552159438] unbound[9110:0] error: SERVFAIL \
<denic.de. DNSKEY IN>: request has exceeded the maximum dependency depth (eg. \
nameserver lookup recursion) 2019-03-09 20:23:58.778581500 [1552159438] \
unbound[9110:0] error: SERVFAIL <denic.de. DNSKEY IN>: request has exceeded the \
maximum dependency depth (eg. nameserver lookup recursion) 2019-03-09 \
20:23:58.789290500 [1552159438] unbound[9110:0] error: SERVFAIL <denic.de. DNSKEY \
IN>: request has exceeded the maximum dependency depth (eg. nameserver lookup \
recursion) 2019-03-09 20:23:58.792477500 [1552159438] unbound[9110:0] error: SERVFAIL \
<a.gtld-servers.net. A IN>: could not fetch nameserver at zone gtld-servers.net. \
2019-03-09 20:23:58.792532500 [1552159438] unbound[9110:0] error: SERVFAIL \
<e.gtld-servers.net. A IN>: could not fetch nameserver at zone gtld-servers.net. \
2019-03-09 20:23:58.792625500 [1552159438] unbound[9110:0] error: SERVFAIL \
<l.gtld-servers.net. A IN>: could not fetch nameserver at zone gtld-servers.net. \
2019-03-09 20:23:58.792651500 [1552159438] unbound[9110:0] error: SERVFAIL \
<j.gtld-servers.net. A IN>: could not fetch nameserver at zone gtld-servers.net. \
2019-03-09 20:23:58.811873500 [1552159438] unbound[9110:0] error: SERVFAIL <denic.de. \
DNSKEY IN>: request has exceeded the maximum dependency depth (eg. nameserver lookup \
recursion) 2019-03-09 20:23:58.811963500 [1552159438] unbound[9110:0] error: SERVFAIL \
<denic.de. DNSKEY IN>: request has exceeded the maximum dependency depth (eg. \
nameserver lookup recursion) 2019-03-09 20:23:58.852893500 [1552159438] \
unbound[9110:0] error: SERVFAIL <l.gtld-servers.net. AAAA IN>: could not fetch \
nameserver at zone gtld-servers.net. 2019-03-09 20:23:58.852937500 [1552159438] \
unbound[9110:0] error: SERVFAIL <f.gtld-servers.net. A IN>: could not fetch \
nameserver at zone gtld-servers.net. 2019-03-09 20:23:58.857556500 [1552159438] \
unbound[9110:0] error: SERVFAIL <d.gtld-servers.net. A IN>: could not fetch \
nameserver at zone gtld-servers.net. 2019-03-09 20:23:58.861666500 [1552159438] \
unbound[9110:0] error: SERVFAIL <c.gtld-servers.net. A IN>: could not fetch \
nameserver at zone gtld-servers.net. 2019-03-09 20:23:58.886935500 [1552159438] \
unbound[9110:0] error: SERVFAIL <g.gtld-servers.net. A IN>: could not fetch \
nameserver at zone gtld-servers.net. 2019-03-09 20:23:58.886969500 [1552159438] \
unbound[9110:0] error: SERVFAIL <b.gtld-servers.net. AAAA IN>: could not fetch \
nameserver at zone gtld-servers.net. 2019-03-09 20:23:58.886971500 [1552159438] \
unbound[9110:0] error: SERVFAIL <a.gtld-servers.net. AAAA IN>: could not fetch \
nameserver at zone gtld-servers.net.


how should I read this error messages? At lease https://zonemaster.net do not list \
any relevant problems for gtld-servers.net.de., de. or denic.de. I'm a little bit \
confused if these messages hide other/true errors.

Andreas


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