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Session Warning: "User ID mismatch, {uid_a} !== {uid_b}"
Open, MediumPublicPRODUCTION ERROR

Description

Error

Request ID: W6GNfArAADkAABE6cZcAAABI

normalized message
Session "{session}": User ID mismatch, {uid_a} !== {uid_b}
field.message
Session "[50]CentralAuthSessionProvider<+:#:#####>########": User ID mismatch, ## !== ##
field.session
[object] (MediaWiki\Session\SessionInfo: [50]CentralAuthSessionProvider<+:##:####>#####)

Notes

This warning was recorded 1,912 times in the last 7 days (Logstash).

It originates with different domain names (most frequently from en.wikipedia.org, login.wikimedia.org, and de.wikipedia.org).

The urls it is triggered from tend to be page views, or action=raw requests.

See also:

Event Timeline

mmodell changed the subtype of this task from "Task" to "Production Error".Aug 28 2019, 11:08 PM

I just checked logs, still happening - 177 instances in last 6 hours.

Change 1006177 had a related patch set uploaded (by Gergő Tisza; author: Gergő Tisza):

[mediawiki/core@master] session: Improve text and documentation of SessionManager warnings

https://gerrit.wikimedia.org/r/1006177

Tgr moved this task from Inbox, needs triage to Current Sprint on the MediaWiki-Platform-Team board.
Tgr removed a project: Wikimedia-production-error.

Not actually a production error, the messages are logged to the session channel.

Change 1006177 merged by jenkins-bot:

[mediawiki/core@master] session: Improve text and documentation of SessionManager warnings

https://gerrit.wikimedia.org/r/1006177

Added some extra logging. I don't have a good explanation of what's happening here; manual modification of the cookies could cause this, but it's far too frequent for that.

Tgr removed Tgr as the assignee of this task.Mar 12 2024, 4:46 PM
Tgr moved this task from Current Sprint to Within 2 Qs on the MediaWiki-Platform-Team board.
Tgr subscribed.