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net: empty DNS answers should fail fast #27525
With Go 1.11, DNS queries which are responded to with an empty answers section will be tried on all name servers. This was not the case with Go 1.10. This is mostly an issue if one of the name servers is broken and results in a timeout.
This issue was first reported here: #21906 (comment)
I am filing a new issue because this is a regression in Go 1.11 and #21906 was filed prior to Go 1.10.