The upload step is failing under all FYI runs, but not on the main waterfall bots.

"test_results_uploader.PermanentError: Received HTTP status 400 loading "https://test-results-test.appspot.com/testfile/upload": strconv.Atoi: parsing "null": invalid syntax" sounds like it's trying to upload something ... interesting.

Actually, if this is a chromium.linux/chromium.fyi split, it could be due to the differences between test-results and test-results-test. It also appears that this is happening beyond the fuchsia FYI bots; updating the title accordingly.

+seanmccullough: looks like you've got a tainted version on test-results-test; any idea if that could be related to this?

taking a look... Also, I've been curious - who is posting to test-results-test instead of test-results? Any why?

passing this over since you're looking at it; feel free to pass it back if it isn't something server-side.

As for what's uploading to the staging instance: FYI bots (what better to use the staging instance) & is_experimental builds for luci conversion (to avoid poisoning the actual results uploaded by parallel non-experimental builds), along with some random bots (possibly things that have migrated from FYI?)

Ok. [I think we should try to support those use cases in ShamWow without having to point them at an entirely different instance, so I may have more questions about this later.]

Pushed a non-tainted version. Waiting for more /testfile/upload attempts. Looks like the latest build hasn't gotten to test uploads yet: https://ci.chromium.org/buildbot/chromium.fyi/Fuchsia%20(dbg)/16226

Upload steps are succeeding now.