spaceapesam

Re:Ask HN: Intermittent EC2 DNS failures at 1 minute past the hour on Friday October 03, 2014 @09:06AM (#8405324)

Any update Jeff? We're having trouble getting information via account managers and requesting ticket updates. We're still seeing it right now 13:00 UTC.

Re:Ask HN: Intermittent EC2 DNS failures at 1 minute past the hour on Friday October 03, 2014 @06:49AM (#8404968)

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)