net: nonexistentdomain.golang.org returns a CNAME to golang.org #25370
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I've been seeing this from time to time in the TryBots, too: |
Ian, could you check the golang.org DNS definitions in google3? |
It looks like we have a wildcard *.golang.org to golang.org CNAME. |
Does |
Yes, it seems to. |
Per discussion elsewhere, this seems to be because golang.org has an HSTS policy and Google's servers add a *.golang.org CNAME record related to that. So I guess we could move that test to use a different domain... |
Change https://golang.org/cl/151359 mentions this issue: |
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CL 111718 added TestLookupHostCancel.
This test sends a DNS request to nonexistentdomain.golang.org. However, this
DNS request succeeds and return a CNAME record to golang.org.
@alexbrainman @bradfitz
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