Cannot declare class Wikimedia\MWConfig\Profiler, because the name is already in use in Profiler.php
Closed, DuplicatePublicPRODUCTION ERROR
Actions

Assigned To

None

Authored By

	thcipriani
	Jun 30 2022, 3:14 PM

Description

Error

mwversion: 1.39.0-wmf.17
reqId: 9aeb22db-c633-4ee7-a58e-cab92256b4b7
Find reqId in Logstash

normalized_message

Cannot declare class Wikimedia\MWConfig\Profiler, because the name is already in use in Profiler.php

exception.trace

#0 /srv/mediawiki/wmf-config/PhpAutoPrepend.php(30): require_once()

Notes

The exception happens rarely—22 times in the past 90 days
Always on parsoid servers (wtp*.eqiad.wmnet)
Only happened on wikipedia wikis and once on commons (over the past 90 days)
Always with the pagebundle endpoint; e.g., /w/rest.php/<wikipedia>/v3/page/pagebundle/<etc>

Details

Request URL: https://zh.wikipedia.org/w/rest.php/zh.wikipedia.org/v3/transform/pagebundle/to/pagebundle/<etc>

Related Objects

Mentioned In: T254209: Spike of impossible "Cannot declare class" fatal errors (opcache)
Mentioned Here: T293568: PHP Notice: Undefined offset in wikimedia/remex-html when rendering rest.php error page
T254209: Spike of impossible "Cannot declare class" fatal errors (opcache)

Event Timeline

thcipriani created this task.Jun 30 2022, 3:14 PM

Restricted Application added a subscriber: Aklapper. · View Herald TranscriptJun 30 2022, 3:14 PM

thcipriani moved this task from Untriaged to Jun 2022 on the Wikimedia-production-error board.Jun 30 2022, 3:14 PM

This looks like T254209 which was closed as opcache corruption

Arlolra closed this task as a duplicate of T245183: PHP7 corruption reports in 2020-2022 (Call on wrong object, etc.).Jun 30 2022, 7:16 PM

Krinkle reopened this task as Open.Jun 30 2022, 8:26 PM

Krinkle subscribed.

This comment was removed by Krinkle.

Krinkle closed this task as a duplicate of T254209: Spike of impossible "Cannot declare class" fatal errors (opcache).Jun 30 2022, 8:28 PM

Krinkle mentioned this in T254209: Spike of impossible "Cannot declare class" fatal errors (opcache).Jun 30 2022, 8:30 PM

I am waving hands here, but I wonder if this is a symptom of OOM / timeout and something not being cleaned up properly on the server, but not sure how / why a new request would be sent to the same process.

Well, T254209#8042296 says there were timeouts. Last time (T293568), Excimer was hitting a bug in PHP, but that was never backported to 7.2. Maybe this is another symptom of it.

	F35290931: Screenshot 2022-06-30 at 13.12.53.png
	Jun 30 2022, 8:26 PM

Cannot declare class Wikimedia\MWConfig\Profiler, because the name is already in use in Profiler.phpClosed, DuplicatePublicPRODUCTION ERRORActions