tree 89c6595339ac5276fc3e60cfbb07f76a2e592da0
parent 8c653846df49742c4c85ec37e5d9f8d3ba657895
author Alex Vaghin <ddos@google.com> 1519831114 +0100
committer Alex Vaghin <ddos@google.com> 1519834406 +0000

acme: stop polling authz on 4xx client errors

"At Let's Encrypt, we are seeing clients in the wild that continue
polling their challenges long after those challenges have expired and
started serving 404."

The 4xx response code errors are client errors and should not be
retried.

Fixes golang/go#24145

Change-Id: I012c584fc4defd3a0d64a653860c35705c5c6653
Reviewed-on: https://go-review.googlesource.com/97695
Run-TryBot: Alex Vaghin <ddos@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>