IssueTracker

** A short description of the issue: **

For hosts in the eu-central Amazon Webservices zone, Google nameservers seem to always resolve www.googleapis.com to the address 74.125.193.95 instead of the expected round-robin server list seen in other regions.
This might be the underlying issue of our observation that since around March 7th, a significant share of our calls to www.googleapis.com either time out or have their connection reset.


** What steps will reproduce the problem? **

1. Resolve www.googleapis.com from a host in the eu-central-1 AWS region (Ireland).


** What is the expected output? What do you see instead?  If you see error messages, please provide them. **

Expected output would be similar to other regions, e.g:
$ dig www.googleapis.com @ns1.google.com +short
googleapis.l.google.com.
172.217.16.138
172.217.22.74
172.217.16.202
172.217.18.106
172.217.21.202
216.58.205.234
172.217.21.234
172.217.22.10
172.217.18.170
216.58.206.10
216.58.207.74

Actual output is:
$ dig www.googleapis.com @ns1.google.com +short
googleapis.l.google.com.
74.125.193.95


** Please provide any additional information below. **

Note that this issue is not specific to the Sheets API — we've experienced it for all Google APIs that have their end points on www.googleapis.com.

We first assumed a networking/connectivity issue on Amazon's end. Their support confirmed the issue, but suggested that the discrepancy in the DNS resolving results are the root cause.