CacheableLookup defaults to maxTtl=Infinity, meaning successful DNS
lookups are cached forever until process restart. This causes monitors
to fail permanently if DNS changes or if a resolver outage causes
ENOTFOUND errors to persist after recovery.
Set maxTtl=300s (5 min) for successful lookups and errorTtl=30s for
failed lookups so the cache recovers automatically.
gorkem-bwl
84cac870d5