The link points to XHGui with the request ID from mw.config.get('wgRequestId') but the profile is stored under a different ID.
| Project | Branch | Lines +/- | Subject | |
|---|---|---|---|---|
| operations/mediawiki-config | master | +2 -1 | profiler: Use X-Request-Id instead of UNIQUE_ID for XHGui |
This is fall out from changes in prod (possibly around ATS). The wmf-config/profiler.php code uses UNIQUE_ID set by Apache for the profile's req ID.
In MediaWiki, however, this is no longer used in WMF prod, because there is another ID given to web requsets (as X-Request-ID) which has predence in MW. This was enabled sometime in the last few months I think.
We ran into the same issue with Logstash (T247786, T201409), which was fixed in https://gerrit.wikimedia.org/r/#/c/operations/puppet/+/582948/.
Change 598825 had a related patch set uploaded (by Krinkle; owner: Krinkle):
[operations/mediawiki-config@master] profiler: Use X-Request-Id instead of UNIQUE_ID for XHGui
Change 598825 merged by jenkins-bot:
[operations/mediawiki-config@master] profiler: Use X-Request-Id instead of UNIQUE_ID for XHGui
Mentioned in SAL (#wikimedia-operations) [2020-05-26T21:18:44Z] <krinkle@deploy1001> Synchronized wmf-config/profiler.php: Ib0bf8d97b10b, T253674 (duration: 01m 06s)