1397158 - Getting a lot of CORS errors on t.m.o

Status: RESOLVED DUPLICATE of bug 1353780

(Data Platform and Tools :: General, defect)

Description

[Martin Thomson [:mt:]]

Nothing loads, but plenty of these:

Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at https://aggregates.telemetry.mozilla.org/aggregates_by/build_id/channels/nightly/?version=57&... (Reason: CORS header ‘Access-Control-Allow-Origin’ missing).

Most are followed by:

uncaught exception: Could not obtain evolution: status 0 (https://aggregates.telemetry.mozilla.org/aggregates_by/...)

Comment 1

[Chris H-C :chutten]

We've seen something like this before: https://github.com/mozilla/telemetry-dashboard/issues/326

Do you have any privacy/tracking/security/content-blocking/etc. addons installed?

What version of Firefox are you running? (Actually: what browser in particular are you using?)

Comment 2

[Martin Thomson [:mt:]]

Seems like a transient burp.  It's working nicely right now.

I'm using Nightly of course, as everyone should :)  I had ublock origin installed and probably tracking protection, but that doesn't seem to be the issue.  Those tools all prevent the request.  The request was made, but the response just didn't have Access-Control-Allow-Origin set correctly, as the message says.

The uncaught exception seems like it might be worth doing something about, if nothing else.

Comment 3

[Chris H-C :chutten]

When you say "nothing loads" do you mean no data, or no markup, no CSS, no nothing?

Because if it's just no data, that's likely an instance of bug 1353780 arising from a server error (HTTP 5xx) due to load.

Comment 4

[Martin Thomson [:mt:]]

"nothing loads" == none of the histogram data.  All the HTML, CSS, JS, etc... load fine.

Comment 5

[Chris H-C :chutten]

Sounds like the aggregator was returning an error response without a CORS header. Definitely an instance of bug 1353780, then.