Can also confirm. We've been seeing them for over a week, more severely in the last 2 days. It is not specific to AZs or accounts. We know from Amazon that none of the AZs in our accounts overlap.
It doesn't seem to be the VPC DHCP Options set assigned recursive resolver having problems as resolution from within the VPC via 8.8.8.8, say, still results in occasional SERVFAILs again zones Route53 is authoritative for.
EDIT: some tcpdump confirmation
17:01:27.988201 IP 10.0.0.2.domain > xxxx.54322: 61062 3/0/0 CNAME xxxx., A 10.x.x.x, A 10.x.x.x (151)
17:01:28.278093 IP 10.0.0.2.domain > xxxx.53047: 49767 ServFail 0/0/0 (61)
Comments
Can also confirm. We've been seeing them for over a week, more severely in the last 2 days. It is not specific to AZs or accounts. We know from Amazon that none of the AZs in our accounts overlap.
It doesn't seem to be the VPC DHCP Options set assigned recursive resolver having problems as resolution from within the VPC via 8.8.8.8, say, still results in occasional SERVFAILs again zones Route53 is authoritative for.
EDIT: some tcpdump confirmation