Interop view empty?

[gsnedders]

Currently, going to https://wpt.fyi and clicking on "Interoperability" shows an empty page, with no browsers and no paths loaded.

[Error] Failed to load resource: the server responded with a status of 404 () (https://wpt.fyi/api/interop?complete=true, line 0)
[Error] Unhandled Promise Rejection: Failed to fetch interop data
	(anonymous function) (data:text/javascript;charset=utf-8,%0A…%0A:70)
	asyncFunctionResume
	(anonymous function)
	promiseReactionJob

[lukebjerring]

The reason for this issue is that the CRON job that computes the interop data is running daily, but occassionally (most of the time) we have complete runs land sometime throughout the day, without the interop being re-computed.

Ideally, we need to:

• change to a push-based model
• run the interop more frequently / on update
• have the UI fall back to the most recent instead of 404'ing

In the meantime, whenever the complete run is ahead of interop, it can be quick-fixed by (manually) re-running the Travis CRON job for labels="" @ https://travis-ci.org/web-platform-tests/results-analysis

@Hexcles and I have discussed that push-events can be done from the results-receiver (when a new run is created). We'll need an "subscriber" endpoint for executing a check as to interop scores being up-to-date or not.

[mdittmer]

EDIT: Sorry for the double-post. Had a stale tab open.

This occurs because interop computations are only run daily, but the client code assumes that the latest runs that match query params must have interop data (which is often not the case). @lukebjerring and I have discussed a few long- and short-term fixes to this.

The most immediate fix is to move those cron jobs to run hourly so that the data are correct more often than they are now.

[lukebjerring]

Fixed via prod push #561