DNS 7 YXRRSET vs 8 NXRRSET
Both DNS 7 (YXRRSET) and 8 (NXRRSET) belong to the DNS Response Codes (RCODEs) category. 7 indicates that rR Set Exists when it should not. A resource record set exists that the update prerequisite says should not. Meanwhile, 8 means that rR Set that should exist does not. A required resource record set is missing from the zone.
Описание
RR Set Exists when it should not. A resource record set exists that the update prerequisite says should not.
Когда вы это видите
A DNS UPDATE failed because a specific RRset (e.g., an A record) already exists when the prerequisite required it to be absent.
Как исправить
Delete the conflicting RRset before retrying the update, or adjust your prerequisite conditions to match the actual zone state.
Описание
RR Set that should exist does not. A required resource record set is missing from the zone.
Когда вы это видите
A DNS UPDATE prerequisite expected a certain RRset to exist (e.g., an MX record), but the zone does not contain it.
Как исправить
Create the missing RRset in the zone before retrying the update, or change the prerequisite to not require its existence.
Ключевые различия
DNS 7: RR Set Exists when it should not. A resource record set exists that the update prerequisite says should not.
DNS 8: RR Set that should exist does not. A required resource record set is missing from the zone.
You encounter 7 when a DNS UPDATE failed because a specific RRset (e.g., an A record) already exists when the prerequisite required it to be absent.
You encounter 8 when a DNS UPDATE prerequisite expected a certain RRset to exist (e.g., an MX record), but the zone does not contain it.
Когда что использовать
For 7 (YXRRSET): Delete the conflicting RRset before retrying the update, or adjust your prerequisite conditions to match the actual zone state. For 8 (NXRRSET): Create the missing RRset in the zone before retrying the update, or change the prerequisite to not require its existence.