sneak 2d9910cb14 resolver, watcher: a record type whose query fails keeps its previous records (closes #231) ...

The resolver lists in FailedTypes each record type whose query to a
nameserver got no usable reply (none after two tries, an error reply, a
referral, or a truncated reply whose TCP retry failed), and logs it with
the reason. A nameserver that answered no type has failed, as before.
The watcher saves such a type in failedTypes, keeping the previous
check's records, leaves it out of the comparison with other nameservers
on that check, and compares the kept records with the next answer. With
nothing to keep, it is also in unknownTypes and not compared until it
answers. Change messages leave out what was not compared. A nameserver
whose A, AAAA or CNAME query failed is no answer when following a CNAME
or resolving addresses.

Model: opus-5-5

2026-10-02 06:55:24 +00:00

..

cancelled_test.go

watcher: save and notify nothing for a cut-short port or TLS check (closes #185)

2026-10-01 22:49:45 +02:00

cname_test.go

resolver, watcher: a record type whose query fails keeps its previous records (closes #231)

2026-10-02 06:55:24 +00:00

export_test.go

resolver, watcher: a record type whose query fails keeps its previous records (closes #231)

2026-10-02 06:55:24 +00:00

failedtype_test.go

resolver, watcher: a record type whose query fails keeps its previous records (closes #231)

2026-10-02 06:55:24 +00:00

inconsistency_test.go

watcher: notify NS query failure and recovery (closes #104)

2026-10-01 22:23:33 +02:00

interfaces.go

watcher: notify NS query failure and recovery (closes #104)

2026-10-01 22:23:33 +02:00

message_test.go

watcher: change messages name only the record types that differ (closes #219)

2026-10-02 08:46:56 +02:00

nsaddress_test.go

watcher: notify nameserver address changes (closes #105)

2026-10-01 23:23:26 +02:00

nsfailure_test.go

resolver, watcher: a record type whose query fails keeps its previous records (closes #231)

2026-10-02 06:55:24 +00:00

watcher_test.go

watcher: startup notification no longer says every endpoint works (closes #230)

2026-10-02 08:42:35 +02:00

watcher.go

resolver, watcher: a record type whose query fails keeps its previous records (closes #231)

2026-10-02 06:55:24 +00:00