https://bugs.contribs.org/show_bug.cgi?id=10300
--- Comment #41 from Dan Brown <[email protected]> ---
(In reply to Hsing-Foo Wang from comment #39)
> A *very* wild guess here, could this be related?:
> https://bugs.contribs.org/show_bug.cgi?id=8362
Interesting thought, and on its face it looks like it could be relevant, though
I don't think I know the inner workings well enough to say. If I read that bug
correctly, his tests with paypal.com would fail reliably one time out of four.
Using the same command Chris was using in 8362, here's what happened for me:
[root@dehydrated-test ~]# while dig +noall +ans -t a
cert.stg-int-x1.letsencrypt.org; do sleep 10; echo =====; done
;; connection timed out; no servers could be reached
[root@dehydrated-test ~]# while dig +noall +ans -t a
cert.stg-int-x1.letsencrypt.org; do sleep 10; echo =====; done
cert.stg-int-x1.letsencrypt.org. 583 IN CNAME
cert.stg-int-x1.letsencrypt.org.edgesuite.net.
cert.stg-int-x1.letsencrypt.org.edgesuite.net. 21585 IN CNAME
a1759.dscd.akamai.net.
a1759.dscd.akamai.net. 19 IN A 104.107.60.43
a1759.dscd.akamai.net. 19 IN A 104.107.60.41
=====
cert.stg-int-x1.letsencrypt.org. 573 IN CNAME
cert.stg-int-x1.letsencrypt.org.edgesuite.net.
cert.stg-int-x1.letsencrypt.org.edgesuite.net. 21575 IN CNAME
a1759.dscd.akamai.net.
a1759.dscd.akamai.net. 9 IN A 104.107.60.43
a1759.dscd.akamai.net. 9 IN A 104.107.60.41
=====
cert.stg-int-x1.letsencrypt.org. 563 IN CNAME
cert.stg-int-x1.letsencrypt.org.edgesuite.net.
cert.stg-int-x1.letsencrypt.org.edgesuite.net. 21565 IN CNAME
a1759.dscd.akamai.net.
a1759.dscd.akamai.net. 20 IN A 104.107.60.41
a1759.dscd.akamai.net. 20 IN A 104.107.60.43
=====
cert.stg-int-x1.letsencrypt.org. 553 IN CNAME
cert.stg-int-x1.letsencrypt.org.edgesuite.net.
cert.stg-int-x1.letsencrypt.org.edgesuite.net. 21555 IN CNAME
a1759.dscd.akamai.net.
a1759.dscd.akamai.net. 10 IN A 104.107.60.41
a1759.dscd.akamai.net. 10 IN A 104.107.60.43
=====
cert.stg-int-x1.letsencrypt.org. 543 IN CNAME
cert.stg-int-x1.letsencrypt.org.edgesuite.net.
cert.stg-int-x1.letsencrypt.org.edgesuite.net. 21545 IN CNAME
a1759.dscd.akamai.net.
a1759.dscd.akamai.net. 0 IN A 104.107.60.41
a1759.dscd.akamai.net. 0 IN A 104.107.60.43
=====
Again, the first attempt to resolve the host, on a clean VM that's never tried
to resolve the host before, failed. After that, it consistently succeeded for
the next 12 attempts before I terminated the command.
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