(sorry, I accidentally removed the attached while while editing the mime type)

Seems that libdns does not pick it up /etc/hosts

The nsswitch items "mymachine", "resolve", and "myhostname" are not known to
libdns but should have been skipped. "files" is the first entry and should have
delivered the result.

2.1.19 behaves (almost) the same:

• dirmngr does ignore /etc/hosts
• dirmngr is only resolving trough dns

SRV? _pgpkey-https._tcp.keyserver.example.com. (59)
SRV? _pgpkey-https._tcp.keyserver.example.com.localdomain. (71)
A? keyserver.example.com. (40)
A? keyserver.example.com.localdomain. (52)
AAAA? keyserver.example.com. (40)
AAAA? keyserver.example.com.localdomain. (52)
A? keyserver.example.com. (40)
A? keyserver.example.com.localdomain. (52)
AAAA? keyserver.example.com. (40)
AAAA? keyserver.example.com.localdomain. (52)

The command output changed slightly:

gpg2 --debug-level guru --search-keys example.com
gpg: enabled debug flags: packet mpi crypto filter iobuf memory cache memstat trust
hashing ipc clock lookup extprog
gpg: DBG: [not enabled in the source] start
gpg: DBG: chan_3 <- # Home: /tmp/gnupg-test
gpg: DBG: chan_3 <- # Config: /tmp/gnupg-test/dirmngr.conf
gpg: DBG: chan_3 <- OK Dirmngr 2.1.19 at your service
gpg: DBG: connection to the dirmngr established
gpg: DBG: chan_3 -> GETINFO version
gpg: DBG: chan_3 <- D 2.1.19
gpg: DBG: chan_3 <- OK
gpg: DBG: chan_3 -> KS_SEARCH -- example.com
gpg: DBG: chan_3 <- ERR 167772380 No name <Dirmngr>
gpg: error searching keyserver: No name
gpg: keyserver search failed: No name
gpg: DBG: chan_3 -> BYE
gpg: DBG: [not enabled in the source] stop
gpg: random usage: poolsize=600 mixed=0 polls=0/0 added=0/0

outmix=0 getlvl1=0/0 getlvl2=0/0

gpg: secmem usage: 0/32768 bytes in 0 blocks

Fixed in 88f1505f0613894d5544290a170119eb538921e5.