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Maniphest T437687

TypeError: MediaWiki\Title\NamespaceInfo::exists(): Argument #1 ($index) must be of type int, null given, called in /srv/mediawiki/php-1.47.0-wmf.19/includes/Title/Title.php on line 644
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Description

Error
  • service.version: 1.47.0-wmf.19
  • timestamp: 2026-09-11T04:17:11.584Z
  • labels.phpversion: 8.3.33
  • trace.id: ad5cbf10-9377-409b-aa8c-d19d05c767b6
  • Find trace.id in Logstash
labels.normalized_message
[{reqId}] {exception_url}   TypeError: MediaWiki\Title\NamespaceInfo::exists(): Argument #1 ($index) must be of type int, null given, called in /srv/mediawiki/php-1.47.0-wmf.19/includes/Title/Title.php on line 644
FrameLocationCall
from/srv/mediawiki/php-1.47.0-wmf.19/includes/Title/NamespaceInfo.php(268)
#0/srv/mediawiki/php-1.47.0-wmf.19/includes/Title/Title.php(644)MediaWiki\Title\NamespaceInfo->exists(null)
#1/srv/mediawiki/php-1.47.0-wmf.19/extensions/Wikibase/client/includes/Specials/SpecialEntityUsage.php(196)MediaWiki\Title\Title::makeTitleSafe(null, null)
#2/srv/mediawiki/php-1.47.0-wmf.19/includes/SpecialPage/QueryPage.php(952)Wikibase\Client\Specials\SpecialEntityUsage->formatResult(MediaWiki\Minerva\Skins\SkinMinerva, stdClass)
#3/srv/mediawiki/php-1.47.0-wmf.19/includes/SpecialPage/QueryPage.php(912)MediaWiki\SpecialPage\QueryPage->outputResults(MediaWiki\Output\OutputPage, MediaWiki\Minerva\Skins\SkinMinerva, Wikimedia\Rdbms\DBConnRef, Wikimedia\Rdbms\FakeResultWrapper, int, int)
#4/srv/mediawiki/php-1.47.0-wmf.19/extensions/Wikibase/client/includes/Specials/SpecialEntityUsage.php(71)MediaWiki\SpecialPage\QueryPage->execute(string)
#5/srv/mediawiki/php-1.47.0-wmf.19/includes/SpecialPage/SpecialPage.php(727)Wikibase\Client\Specials\SpecialEntityUsage->execute(string)
#6/srv/mediawiki/php-1.47.0-wmf.19/includes/SpecialPage/SpecialPageFactory.php(1728)MediaWiki\SpecialPage\SpecialPage->run(string)
#7/srv/mediawiki/php-1.47.0-wmf.19/includes/Actions/ActionEntryPoint.php(505)MediaWiki\SpecialPage\SpecialPageFactory->executePath(string, MediaWiki\Context\RequestContext)
#8/srv/mediawiki/php-1.47.0-wmf.19/includes/Actions/ActionEntryPoint.php(145)MediaWiki\Actions\ActionEntryPoint->performRequest()
#9/srv/mediawiki/php-1.47.0-wmf.19/includes/MediaWikiEntryPoint.php(180)MediaWiki\Actions\ActionEntryPoint->execute()
#10/srv/mediawiki/php-1.47.0-wmf.19/index.php(44)MediaWiki\MediaWikiEntryPoint->run()
#11/srv/mediawiki/w/index.php(3)require(string)
#12{main}
Impact
Notes

Details

Request URL
https://uk.wikisource.org/w/index.php?entity=*&limit=*&offset=*&title=*
Related Changes in Gerrit:
SubjectAuthorRepoBranchLines +/-
Fixes failing edge when page is missing and entity usage remain. Updating ReallyDoQuery to function like an inner join.Awightmediawiki/extensions/Wikibasewmf/1.47.0-wmf.21+27 -11
Fixes failing edge when page is missing and entity usage remain. Updating ReallyDoQuery to function like an inner join.Nicholusmuwongemediawiki/extensions/Wikibasemaster+27 -11
Customize query in gerrit

Related Objects

Event Timeline

Ammarpad created this task.Fri, Sep 11, 8:55 AM
Restricted Application added a subscriber: Aklapper. · View Herald TranscriptFri, Sep 11, 8:55 AM
Maintenance_bot added a project: Wikidata.Fri, Sep 11, 9:29 AM
Lydia_Pintscher added a project: Wikidata Integration in Wikimedia projects.Fri, Sep 11, 1:51 PM
jnuche merged a task: T438036: PHP Warning: Undefined property: stdClass::$namespace when using SpecialEntityUsage.Tue, Sep 15, 2:27 PM
jnuche added a subscriber: Dreamy_Jazz.
Umherirrender added subscribers: Nicholusmuwonge_wmde, awight, Umherirrender.Fri, Sep 18, 6:20 PM

The stack trace shows MediaWiki\Title\Title::makeTitleSafe(null, null), the nulls are from a database row.

The function joinResults maybe makes this result set, it was added recently with db519ed0db56eb3268072cb2f5f226aa6b17051b
@awight and @Nicholusmuwonge_wmde, can you take a look if this is related to your changes? Thanks.

Umherirrender mentioned this in T427472: [X1][Wikibase] Update queries in Wikibase to use new database configuration (parallel) (FM-F) (🌷).Fri, Sep 18, 6:43 PM
Umherirrender mentioned this in T436060: InvalidArgumentException: Wikimedia\Rdbms\Platform\SQLPlatform::makeList: empty input for field page_id.
Nicholusmuwonge_wmde added a comment.Mon, Sep 21, 5:51 AM

Taking a look at it.

awight added a comment.Mon, Sep 21, 6:19 AM

Thanks for tagging us! It does seem to be related—but also, the issue may have been resolved with the wmf.20 deployment:
https://logstash.wikimedia.org/goto/e1d5d119b31c83244c17a27bf0b0243e

image.png (1,653×362 px, 37 KB)

awight mentioned this in T438717: Entity usage rows are left unconnected to a page.Mon, Sep 21, 11:07 AM
Nicholusmuwonge_wmde claimed this task.Tue, Sep 22, 6:57 AM
gerritbot added a comment.Tue, Sep 22, 7:15 AM

Change #1343858 had a related patch set uploaded (by Nicholusmuwonge; author: Nicholusmuwonge):

[mediawiki/extensions/Wikibase@master] Fixes failing edge when page is missing and entity usage remain. Updating ReallyDoQuery to function like an inner join.

https://gerrit.wikimedia.org/r/1343858

gerritbot added a project: Patch-For-Review.Tue, Sep 22, 7:15 AM
awight edited projects, added: Wikidata Integration in Wikimedia projects (Goals Board); removed: Wikidata Integration in Wikimedia projects.Tue, Sep 22, 8:18 AM
awight moved this task from In Preparation to In Progress (+ sprint emoji to the title on entry) WIP = 4 on the Wikidata Integration in Wikimedia projects (Goals Board) board.
Nicholusmuwonge_wmde moved this task from In Progress (+ sprint emoji to the title on entry) WIP = 4 to In Review / Comms + AC Testing on the Wikidata Integration in Wikimedia projects (Goals Board) board.Tue, Sep 22, 9:52 AM
dancy subscribed.Tue, Sep 22, 3:15 PM

The following two errors come along the one reported in this ticket. Storing here so they show up in searches:

Error
  • mwversion: 1.47.0-wmf.20
  • timestamp: 2026-09-22T15:03:42.549Z
  • phpversion: 8.3.33
  • reqId: 8563b06f-c218-4dd5-80e4-402f00e469d1
  • Find reqId in Logstash
normalized_message
[{reqId}] {exception_url}   PHP Warning: Undefined property: stdClass::$title
FrameLocationCall
from/srv/mediawiki/php-1.47.0-wmf.20/extensions/Wikibase/client/includes/Specials/SpecialEntityUsage.php(196)
#0/srv/mediawiki/php-1.47.0-wmf.20/extensions/Wikibase/client/includes/Specials/SpecialEntityUsage.php(196)MediaWiki\Exception\MWExceptionHandler::handleError(int, string, string, int)
#1/srv/mediawiki/php-1.47.0-wmf.20/includes/SpecialPage/QueryPage.php(952)Wikibase\Client\Specials\SpecialEntityUsage->formatResult(MediaWiki\Skins\Vector\SkinVector22, stdClass)
#2/srv/mediawiki/php-1.47.0-wmf.20/includes/SpecialPage/QueryPage.php(912)MediaWiki\SpecialPage\QueryPage->outputResults(MediaWiki\Output\OutputPage, MediaWiki\Skins\Vector\SkinVector22, Wikimedia\Rdbms\DBConnRef, Wikimedia\Rdbms\FakeResultWrapper, int, int)
#3/srv/mediawiki/php-1.47.0-wmf.20/extensions/Wikibase/client/includes/Specials/SpecialEntityUsage.php(71)MediaWiki\SpecialPage\QueryPage->execute(string)
#4/srv/mediawiki/php-1.47.0-wmf.20/includes/SpecialPage/SpecialPage.php(727)Wikibase\Client\Specials\SpecialEntityUsage->execute(string)
#5/srv/mediawiki/php-1.47.0-wmf.20/includes/SpecialPage/SpecialPageFactory.php(1727)MediaWiki\SpecialPage\SpecialPage->run(string)
#6/srv/mediawiki/php-1.47.0-wmf.20/includes/Actions/ActionEntryPoint.php(505)MediaWiki\SpecialPage\SpecialPageFactory->executePath(string, MediaWiki\Context\RequestContext)
#7/srv/mediawiki/php-1.47.0-wmf.20/includes/Actions/ActionEntryPoint.php(145)MediaWiki\Actions\ActionEntryPoint->performRequest()
#8/srv/mediawiki/php-1.47.0-wmf.20/includes/MediaWikiEntryPoint.php(180)MediaWiki\Actions\ActionEntryPoint->execute()
#9/srv/mediawiki/php-1.47.0-wmf.20/index.php(44)MediaWiki\MediaWikiEntryPoint->run()
#10/srv/mediawiki/w/index.php(3)require(string)
#11{main}
Error
  • mwversion: 1.47.0-wmf.20
  • timestamp: 2026-09-22T15:03:42.549Z
  • phpversion: 8.3.33
  • reqId: 8563b06f-c218-4dd5-80e4-402f00e469d1
  • Find reqId in Logstash
normalized_message
[{reqId}] {exception_url}   PHP Warning: Undefined property: stdClass::$namespace
FrameLocationCall
from/srv/mediawiki/php-1.47.0-wmf.20/extensions/Wikibase/client/includes/Specials/SpecialEntityUsage.php(196)
#0/srv/mediawiki/php-1.47.0-wmf.20/extensions/Wikibase/client/includes/Specials/SpecialEntityUsage.php(196)MediaWiki\Exception\MWExceptionHandler::handleError(int, string, string, int)
#1/srv/mediawiki/php-1.47.0-wmf.20/includes/SpecialPage/QueryPage.php(952)Wikibase\Client\Specials\SpecialEntityUsage->formatResult(MediaWiki\Skins\Vector\SkinVector22, stdClass)
#2/srv/mediawiki/php-1.47.0-wmf.20/includes/SpecialPage/QueryPage.php(912)MediaWiki\SpecialPage\QueryPage->outputResults(MediaWiki\Output\OutputPage, MediaWiki\Skins\Vector\SkinVector22, Wikimedia\Rdbms\DBConnRef, Wikimedia\Rdbms\FakeResultWrapper, int, int)
#3/srv/mediawiki/php-1.47.0-wmf.20/extensions/Wikibase/client/includes/Specials/SpecialEntityUsage.php(71)MediaWiki\SpecialPage\QueryPage->execute(string)
#4/srv/mediawiki/php-1.47.0-wmf.20/includes/SpecialPage/SpecialPage.php(727)Wikibase\Client\Specials\SpecialEntityUsage->execute(string)
#5/srv/mediawiki/php-1.47.0-wmf.20/includes/SpecialPage/SpecialPageFactory.php(1727)MediaWiki\SpecialPage\SpecialPage->run(string)
#6/srv/mediawiki/php-1.47.0-wmf.20/includes/Actions/ActionEntryPoint.php(505)MediaWiki\SpecialPage\SpecialPageFactory->executePath(string, MediaWiki\Context\RequestContext)
#7/srv/mediawiki/php-1.47.0-wmf.20/includes/Actions/ActionEntryPoint.php(145)MediaWiki\Actions\ActionEntryPoint->performRequest()
#8/srv/mediawiki/php-1.47.0-wmf.20/includes/MediaWikiEntryPoint.php(180)MediaWiki\Actions\ActionEntryPoint->execute()
#9/srv/mediawiki/php-1.47.0-wmf.20/index.php(44)MediaWiki\MediaWikiEntryPoint->run()
#10/srv/mediawiki/w/index.php(3)require(string)
#11{main}

This seems to have started happening around Sept 10, 2026.

awight triaged this task as High priority.Wed, Sep 23, 8:10 AM
gerritbot added a comment.Wed, Sep 23, 10:27 AM

Change #1343858 merged by jenkins-bot:

[mediawiki/extensions/Wikibase@master] Fixes failing edge when page is missing and entity usage remain. Updating ReallyDoQuery to function like an inner join.

https://gerrit.wikimedia.org/r/1343858

Maintenance_bot removed a project: Patch-For-Review.Wed, Sep 23, 10:32 AM
seanleong-WMDE moved this task from Goals Board to Sprint 14 🍅 Sept 21 - Oct. 2 on the Wikidata Integration in Wikimedia projects board.Wed, Sep 23, 10:40 AM
seanleong-WMDE edited projects, added: Wikidata Integration in Wikimedia projects (Sprint 14 🍅 Sept 21 - Oct. 2); removed: Wikidata Integration in Wikimedia projects (Goals Board).
Ifeatu_Nnaobi_WMDE moved this task from Backlog to Review on the Wikidata Integration in Wikimedia projects (Sprint 14 🍅 Sept 21 - Oct. 2) board.Wed, Sep 23, 10:42 AM
ReleaseTaggerBot added a project: MW-1.47-notes (1.47.0-wmf.22; 2026-09-29).Wed, Sep 23, 11:00 AM
gerritbot added a comment.Wed, Sep 23, 11:51 AM

Change #1344246 had a related patch set uploaded (by Awight; author: Nicholusmuwonge):

[mediawiki/extensions/Wikibase@wmf/1.47.0-wmf.21] Fixes failing edge when page is missing and entity usage remain. Updating ReallyDoQuery to function like an inner join.

https://gerrit.wikimedia.org/r/1344246

gerritbot added a project: Patch-For-Review.Wed, Sep 23, 11:51 AM
gerritbot added a comment.Thu, Sep 24, 1:29 PM

Change #1344246 merged by jenkins-bot:

[mediawiki/extensions/Wikibase@wmf/1.47.0-wmf.21] Fixes failing edge when page is missing and entity usage remain. Updating ReallyDoQuery to function like an inner join.

https://gerrit.wikimedia.org/r/1344246

Stashbot added a comment.Thu, Sep 24, 1:29 PM

Mentioned in SAL (#wikimedia-operations) [2026-09-24T13:29:52Z] <awight@deploy1003> Started scap sync-world: Backport for [[gerrit:1344246|Fixes failing edge when page is missing and entity usage remain. Updating ReallyDoQuery to function like an inner join. (T437687)]]

Maintenance_bot removed a project: Patch-For-Review.Thu, Sep 24, 1:31 PM
Stashbot added a comment.Thu, Sep 24, 1:33 PM

Mentioned in SAL (#wikimedia-operations) [2026-09-24T13:33:51Z] <awight@deploy1003> awight: Backport for [[gerrit:1344246|Fixes failing edge when page is missing and entity usage remain. Updating ReallyDoQuery to function like an inner join. (T437687)]] synced to the testservers (see https://wikitech.wikimedia.org/wiki/Mwdebug). Changes can now be verified there.

Stashbot added a comment.Thu, Sep 24, 1:40 PM

Mentioned in SAL (#wikimedia-operations) [2026-09-24T13:40:30Z] <awight@deploy1003> Finished scap sync-world: Backport for [[gerrit:1344246|Fixes failing edge when page is missing and entity usage remain. Updating ReallyDoQuery to function like an inner join. (T437687)]] (duration: 10m 38s)

ReleaseTaggerBot edited projects, added: MW-1.47-notes (1.47.0-wmf.21; 2026-09-22); removed: MW-1.47-notes (1.47.0-wmf.22; 2026-09-29).Thu, Sep 24, 2:00 PM
seanleong-WMDE moved this task from Review to Done on the Wikidata Integration in Wikimedia projects (Sprint 14 🍅 Sept 21 - Oct. 2) board.Thu, Sep 24, 2:38 PM
seanleong-WMDE subscribed.Thu, Sep 24, 2:50 PM

Hi, the fix is backported and tested in 1.47.0-wmf.21. Should be in all groups by the end of this week, will monitor until then. Thanks!

Umherirrender merged a task: T439151: Special:EntityUsage: TypeError: MediaWiki\Title\NamespaceInfo::exists(): Argument #1 ($index) must be of type int, null given.Fri, Sep 25, 4:05 PM
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