MediaWiki\Rest: JSON encoding error: Malformed UTF-8 characters, possibly incorrectly encoded
Closed, ResolvedPublicPRODUCTION ERROR
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Assigned To

Authored By

	brennen
	Aug 24 2021, 4:51 PM

Description

Error

https://logstash.wikimedia.org/goto/d402fbfaba26b7a25231493544fe5ba4

mwversion: 1.37.0-wmf.19
reqId: 70e56461-bc24-4b49-9289-0450138ef770
Find reqId in Logstash
Find normalized_message in Logstash

normalized_message

[{reqId}] {exception_url}   MediaWiki\Rest\JsonEncodingException: JSON encoding error: Malformed UTF-8 characters, possibly incorrectly encoded

exception.trace

from /srv/mediawiki/php-1.37.0-wmf.19/includes/Rest/ResponseFactory.php(42)
#0 /srv/mediawiki/php-1.37.0-wmf.19/includes/Rest/ResponseFactory.php(65): MediaWiki\Rest\ResponseFactory->encodeJson(array)
#1 /srv/mediawiki/php-1.37.0-wmf.19/includes/Rest/ResponseFactory.php(174): MediaWiki\Rest\ResponseFactory->createJson(array)
#2 /srv/mediawiki/php-1.37.0-wmf.19/includes/Rest/ResponseFactory.php(197): MediaWiki\Rest\ResponseFactory->createHttpError(integer, array)
#3 /srv/mediawiki/php-1.37.0-wmf.19/includes/Rest/ResponseFactory.php(211): MediaWiki\Rest\ResponseFactory->createLocalizedHttpError(integer, Wikimedia\Message\MessageValue, array)
#4 /srv/mediawiki/php-1.37.0-wmf.19/includes/Rest/Router.php(332): MediaWiki\Rest\ResponseFactory->createFromException(MediaWiki\Rest\LocalizedHttpException)
#5 /srv/mediawiki/php-1.37.0-wmf.19/includes/Rest/EntryPoint.php(165): MediaWiki\Rest\Router->execute(MediaWiki\Rest\RequestFromGlobals)
#6 /srv/mediawiki/php-1.37.0-wmf.19/includes/Rest/EntryPoint.php(130): MediaWiki\Rest\EntryPoint->execute()
#7 /srv/mediawiki/php-1.37.0-wmf.19/rest.php(31): MediaWiki\Rest\EntryPoint::main()
#8 /srv/mediawiki/w/rest.php(3): require(string)
#9 {main}

Impact

Reproducible at URLs - fatal error returned to user.

Notes

2150 of these in last four hours; a couple of large spikes.

Details

Request URL: https://commons.wikimedia.org/w/rest.php/v1/file/File:[filename].jpg

	Subject	Repo	Branch	Lines +/-
	In Rest\ResponseFactory, substitute invalid UTF-8	mediawiki/core	master	+3 -1

Customize query in gerrit

Event Timeline

brennen created this task.Aug 24 2021, 4:51 PM

Restricted Application added a subscriber: Aklapper. · View Herald TranscriptAug 24 2021, 4:51 PM

brennen moved this task from Backlog to Logs/Train on the User-brennen board.Aug 24 2021, 4:51 PM

This is continuing to spike intermittently, and now generating alerts.

dancy subscribed.Aug 24 2021, 5:30 PM

aaron updated the task description. (Show Details)Aug 24 2021, 9:46 PM

Change 714663 had a related patch set uploaded (by Tim Starling; author: Tim Starling):

[mediawiki/core@master] In Rest\\ResponseFactory, substitute invalid UTF-8

https://gerrit.wikimedia.org/r/714663

gerritbot added a project: Patch-For-Review.Aug 25 2021, 1:58 AM

Change 714663 merged by jenkins-bot:

[mediawiki/core@master] In Rest\\ResponseFactory, substitute invalid UTF-8

https://gerrit.wikimedia.org/r/714663

ReleaseTaggerBot added a project: MW-1.37-notes (1.37.0-wmf.21; 2021-08-30).Aug 26 2021, 11:00 AM

Maintenance_bot removed a project: Patch-For-Review.Aug 26 2021, 11:10 AM

tstarling triaged this task as High priority.Aug 30 2021, 5:08 AM

Krinkle moved this task from Untriaged to Aug 2021 on the Wikimedia-production-error board.Sep 1 2021, 3:10 AM

tstarling closed this task as Resolved.Sep 16 2021, 9:30 PM

tstarling claimed this task.

MediaWiki\Rest: JSON encoding error: Malformed UTF-8 characters, possibly incorrectly encodedClosed, ResolvedPublicPRODUCTION ERRORActions