Runtime: Test failure: System.Net.Tests.HttpWebRequestTest_Async.GetResponseAsync_ServerNameNotInDns_ThrowsWebException

[v-haren]

failed in job: runtime-libraries outerloop 20200809.1

Error message
~~~
Assert.Equal() Failure
Expected: NameResolutionFailure
Actual: UnknownError

Stack trace
at System.Net.Tests.HttpWebRequestTest.GetResponseAsync_ServerNameNotInDns_ThrowsWebException() in /_/src/libraries/System.Net.Requests/tests/HttpWebRequestTest.cs:line 1412
--- End of stack trace from previous location ---
~~~

[msftbot[bot]]

Tagging subscribers to this area: @safern, @viktorhofer
See info in area-owners.md if you want to be subscribed.

[msftbot[bot]]

Tagging subscribers to this area: @dotnet/ncl
See info in area-owners.md if you want to be subscribed.

[MihaZupan]

Fails very frequently across all queues since 7th of August.
So far in #40338, #40108, #39201 and master

[ManickaP]

Hit in #39201

[antonfirsov]

since 2020-08-07.

@MihaZupan I'm terribly confused about date formats 😄 Does this mean 8th of July or 7th of August?

In the latter case I probably blame #40344. @geoffkizer it looks no OuterLoop test run happened in that PR. For me the failure seemsreproducible locally + deterministic.

[geoffkizer]

Yep, it's probably from my PR. Will take a look.

[MihaZupan]

7th of August

I try to use the Y-M-D (instead of ?-?-Y) format as much as possible to avoid the month vs day confusion. Should have named the month though😄

[antonfirsov]

@MihaZupan Y-M-D should be the one and only valid date format, everyone else is wrong IMO.

[antonfirsov]

@geoffkizer could this do something with the fact that NetworkError.InvalidAddress is missing from your PR? (But not the API proposal)

[geoffkizer]

I don't think so. I think there's just some logic somewhere that's testing for HostNotFound and it's not mapping it correctly now. Shouldn't be hard to find.