How can I fix error H31 at Heroku/PointDNS?

user_3170151 0
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I use PointDNS to manage my DNS. In July, they had a migration from IPv4 to IPv6, but I did everything they recommended for the migration.

Heroku also had an update, but I checked everything mentioned on this email (I didn't get the email myself), and everything seems to be the way it's supposed to be. Any idea on what might be the issue?

I have no idea if I configured something wrong if Heroku is having issues (this doesn't seem related), or if PointDNS is having issues (says the last downtime was 4 hours ago)

2021-08-13T21:48:45.365853+00:00 heroku[router]: at=error code=H31 desc="Misdirected Request" method=GET path="/favicon.ico" host=site.com.br request_id=2bcf003e-1c07-4fd7-a549-5a7488699c8d fwd="179.24.194.180" dyno= connect= service= status=421 bytes= protocol=https agent="Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.114 Safari/537.36"
pointdns heroku
1 Answers

It may sound kind of weird but, my app was working in some instances while not working on others.

I simply just renamed the application, thinking that changing the DNS might help with the problem and to my surprise, it did!

I'm trying to get into the root cause of this, and would update the answer once I have something concrete. Till the time being, try renaming your application and it may help.

P.S. I know this question is old, but still posting an answer in case anyone else is looking for a way out.

user_115391020
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