System.IO.Tests.File_GetSetTimes.SetDateTimeMax fails on Ubuntu 18.04 in the CI

[janvorli]

In two of my unrelated CIs, the System.IO.Tests.File_GetSetTimes.SetDateTimeMax test keeps failing on Ubuntu 18.04 with the following error:

Assert.Equal() Failure\nExpected: 9999-04-11T23:47:17.0210000Z\nActual:   2446-05-10T22:38:55.0000000Z

There was a notice from the engineering team that they have updated Ubuntu 18.04 image to the latest version, so I wonder if it is related. Setting the file time calls utimes or utimensat glibc functions, so their implementation w.r.t. clipping the max time could have possibly changed.

Runfo Tracking Issue: System.IO.Tests.File_GetSetTimes.SetDateTimeMax fails on Ubuntu 18.04 in the CI

Build	Definition	Kind	Run Name

Build Result Summary

Day Hit Count	Week Hit Count	Month Hit Count
0	0	0

[janvorli]

Here is a link to the report on the test failure:
https://dev.azure.com/dnceng/public/_build/results?buildId=844366&view=ms.vss-test-web.build-test-results-tab&runId=26886200&resultId=147130&paneView=debug

[janvorli]

I can repro the issue on my local Ubuntu 18.04 VM too.

[janvorli]

It seems there was a kernel patch that enabled limits on the time stamps, see https://lore.kernel.org/lkml/20190730014924.2193-10-deepa.kernel@gmail.com/. The timestamp limit mentioned in that page matches what we are getting as the actual value in the test.

[stephentoub]

I'm disabling the test for now on Linux in #43178.