Maniphest T208103

Wikibase Lexeme emits "PHP Warning: Class __PHP_Incomplete_Class has no unserializer"
Closed, ResolvedPublicPRODUCTION ERROR
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Description

Error

Request ID: W9OUpwpAADwAAFzosmYAAABM

message

PHP Warning: Class __PHP_Incomplete_Class has no unserializer

trace

#0 /srv/mediawiki/php-1.33.0-wmf.1/includes/objectcache/SqlBagOStuff.php(697): MWExceptionHandler::handleError(integer, string, string, integer, array, array)
#1 /srv/mediawiki/php-1.33.0-wmf.1/includes/objectcache/SqlBagOStuff.php(299): SqlBagOStuff->unserialize(string)
#2 /srv/mediawiki/php-1.33.0-wmf.1/includes/objectcache/SqlBagOStuff.php(242): SqlBagOStuff->getMulti(array)
#3 /srv/mediawiki/php-1.33.0-wmf.1/includes/objectcache/SqlBagOStuff.php(238): SqlBagOStuff->getWithToken(string, NULL, integer)
#4 /srv/mediawiki/php-1.33.0-wmf.1/includes/libs/objectcache/BagOStuff.php(197): SqlBagOStuff->doGet(string, integer)
#5 /srv/mediawiki/php-1.33.0-wmf.1/includes/libs/objectcache/MultiWriteBagOStuff.php(114): BagOStuff->get(string, integer)
#6 /srv/mediawiki/php-1.33.0-wmf.1/includes/libs/objectcache/BagOStuff.php(197): MultiWriteBagOStuff->doGet(string, integer)
#7 /srv/mediawiki/php-1.33.0-wmf.1/includes/parser/ParserCache.php(247): BagOStuff->get(string, integer, integer)
#8 /srv/mediawiki/php-1.33.0-wmf.1/includes/page/Article.php(689): ParserCache->get(WikiPage, ParserOptions)
#9 /srv/mediawiki/php-1.33.0-wmf.1/extensions/Wikibase/repo/includes/Actions/ViewEntityAction.php(79): Article->view()
#10 /srv/mediawiki/php-1.33.0-wmf.1/extensions/Wikibase/repo/includes/Actions/ViewEntityAction.php(54): Wikibase\ViewEntityAction->showEntityPage()
#11 /srv/mediawiki/php-1.33.0-wmf.1/extensions/WikibaseLexeme/src/MediaWiki/Actions/ViewLexemeAction.php(16): Wikibase\ViewEntityAction->show()
#12 /srv/mediawiki/php-1.33.0-wmf.1/includes/MediaWiki.php(501): Wikibase\Lexeme\MediaWiki\Actions\ViewLexemeAction->show()
#13 /srv/mediawiki/php-1.33.0-wmf.1/includes/MediaWiki.php(294): MediaWiki->performAction(Article, Title)
#14 /srv/mediawiki/php-1.33.0-wmf.1/includes/MediaWiki.php(860): MediaWiki->performRequest()
#15 /srv/mediawiki/php-1.33.0-wmf.1/includes/MediaWiki.php(517): MediaWiki->main()

Impact

Unknown.

Notes

Regression since this week's branch. Example request: GET /wiki/Lexeme:L2747

Related Objects
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		Status	Subtype	Assigned	Task
		Resolved	Release	• mmodell	T206655 1.33.0-wmf.1 deployment blockers
		Resolved	PRODUCTION ERROR	• mmodell	T208103 Wikibase Lexeme emits "PHP Warning: Class __PHP_Incomplete_Class has no unserializer"

Event Timeline

Krinkle created this task.Oct 26 2018, 10:30 PM

Restricted Application added a project: Wikidata. · View Herald TranscriptOct 26 2018, 10:30 PM

Krinkle added a parent task: T206655: 1.33.0-wmf.1 deployment blockers.Oct 26 2018, 10:30 PM

Krinkle moved this task from Aug2019/1.34.wmf.17+ to Jul2019/1.34.wmf.13+ on the Wikimedia-production-error board.Oct 27 2018, 6:17 PM

Krinkle moved this task from Jul2019/1.34.wmf.13+ to Aug2019/1.34.wmf.17+ on the Wikimedia-production-error board.

WMDE-leszek added a subscriber: Jakob_WMDE.Oct 29 2018, 6:55 PM

It might be it is not related to the code change, but to changes to config of WMF wikis that @Addshore and me have been doing around the time this bug has been reported.
Errors looks similar too symptoms we've been struggling with in T195615, which makes me suspicious that config might be related here.

AFAIK config should be now OK. Could you verify that errors ceased to appear?

I only see one instance of this in all of logstash's history. I think it is safe to assume that it was transient. Alternatively, this is likely dupe of T195615

Addshore moved this task from Incoming to Wikidata-Campsite-Iteration-∞ (On Hold) on the Wikidata-Campsite board.Nov 1 2018, 2:06 PM

Addshore edited projects, added Wikidata-Campsite (Wikidata-Campsite-Iteration-∞ (On Hold)); removed Wikidata-Campsite.

Addshore moved this task from To Do (prioritised from top to bottom) to Done on the Wikidata-Campsite (Wikidata-Campsite-Iteration-∞ (On Hold)) board.

Krinkle moved this task from Aug2019/1.34.wmf.17+ to Resolved on the Wikimedia-production-error board.Jan 25 2019, 10:51 PM

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