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Maniphest T300303

Deadlock in WikiPage::updateCategoryCounts query
Closed, ResolvedPublicPRODUCTION ERROR
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Description

Error
normalized_message
[{reqId}] {exception_url}   Wikimedia\Rdbms\DBQueryError: Error 1213: Deadlock found when trying to get lock; try restarting transaction (db1138)
Function: WikiPage::updateCategoryCounts
Query: UPDATE  `category` SET cat_pages = cat_pages - 1,cat_files =
exception.trace
from /srv/mediawiki/php-1.38.0-wmf.19/includes/libs/rdbms/database/Database.php(1810)
#0 /srv/mediawiki/php-1.38.0-wmf.19/includes/libs/rdbms/database/Database.php(1794): Wikimedia\Rdbms\Database->getQueryException(string, integer, string, string)
#1 /srv/mediawiki/php-1.38.0-wmf.19/includes/libs/rdbms/database/Database.php(1768): Wikimedia\Rdbms\Database->getQueryExceptionAndLog(string, integer, string, string)
#2 /srv/mediawiki/php-1.38.0-wmf.19/includes/libs/rdbms/database/Database.php(1305): Wikimedia\Rdbms\Database->reportQueryError(string, integer, string, string, boolean)
#3 /srv/mediawiki/php-1.38.0-wmf.19/includes/libs/rdbms/database/Database.php(2670): Wikimedia\Rdbms\Database->query(string, string, integer)
#4 /srv/mediawiki/php-1.38.0-wmf.19/includes/libs/rdbms/database/DBConnRef.php(69): Wikimedia\Rdbms\Database->update(string, array, string, string)
#5 /srv/mediawiki/php-1.38.0-wmf.19/includes/libs/rdbms/database/DBConnRef.php(381): Wikimedia\Rdbms\DBConnRef->__call(string, array)
#6 /srv/mediawiki/php-1.38.0-wmf.19/includes/page/WikiPage.php(3143): Wikimedia\Rdbms\DBConnRef->update(string, array, array, string)
#7 /srv/mediawiki/php-1.38.0-wmf.19/includes/deferred/LinksUpdate/CategoryLinksTable.php(296): WikiPage->updateCategoryCounts(array, array, integer)
#8 /srv/mediawiki/php-1.38.0-wmf.19/includes/deferred/LinksUpdate/CategoryLinksTable.php(264): MediaWiki\Deferred\LinksUpdate\CategoryLinksTable->updateCategoryCounts()
#9 /srv/mediawiki/php-1.38.0-wmf.19/includes/deferred/LinksUpdate/LinksTable.php(391): MediaWiki\Deferred\LinksUpdate\CategoryLinksTable->finishUpdate()
#10 /srv/mediawiki/php-1.38.0-wmf.19/includes/deferred/LinksUpdate/LinksUpdate.php(292): MediaWiki\Deferred\LinksUpdate\LinksTable->update()
#11 /srv/mediawiki/php-1.38.0-wmf.19/includes/deferred/LinksUpdate/LinksUpdate.php(252): MediaWiki\Deferred\LinksUpdate\LinksUpdate->doIncrementalUpdate()
#12 /srv/mediawiki/php-1.38.0-wmf.19/includes/deferred/DeferredUpdates.php(529): MediaWiki\Deferred\LinksUpdate\LinksUpdate->doUpdate()
#13 /srv/mediawiki/php-1.38.0-wmf.19/includes/deferred/RefreshSecondaryDataUpdate.php(103): DeferredUpdates::attemptUpdate(MediaWiki\Deferred\LinksUpdate\LinksUpdate, Wikimedia\Rdbms\LBFactoryMulti)
#14 /srv/mediawiki/php-1.38.0-wmf.19/includes/deferred/DeferredUpdates.php(529): RefreshSecondaryDataUpdate->doUpdate()
#15 /srv/mediawiki/php-1.38.0-wmf.19/includes/deferred/DeferredUpdates.php(414): DeferredUpdates::attemptUpdate(RefreshSecondaryDataUpdate, Wikimedia\Rdbms\LBFactoryMulti)
#16 /srv/mediawiki/php-1.38.0-wmf.19/includes/deferred/DeferredUpdates.php(227): DeferredUpdates::run(RefreshSecondaryDataUpdate, Wikimedia\Rdbms\LBFactoryMulti, Monolog\Logger, BufferingStatsdDataFactory, string)
#17 /srv/mediawiki/php-1.38.0-wmf.19/includes/deferred/DeferredUpdatesScope.php(264): DeferredUpdates::{closure}(RefreshSecondaryDataUpdate, integer)
#18 /srv/mediawiki/php-1.38.0-wmf.19/includes/deferred/DeferredUpdatesScope.php(196): DeferredUpdatesScope->processStageQueue(integer, integer, Closure)
#19 /srv/mediawiki/php-1.38.0-wmf.19/includes/deferred/DeferredUpdates.php(248): DeferredUpdatesScope->processUpdates(integer, Closure)
#20 /srv/mediawiki/php-1.38.0-wmf.19/includes/MediaWiki.php(1114): DeferredUpdates::doUpdates()
#21 /srv/mediawiki/php-1.38.0-wmf.19/includes/MediaWiki.php(839): MediaWiki->restInPeace()
#22 /srv/mediawiki/php-1.38.0-wmf.19/includes/MediaWiki.php(588): MediaWiki->doPostOutputShutdown()
#23 /srv/mediawiki/php-1.38.0-wmf.19/index.php(53): MediaWiki->run()
#24 /srv/mediawiki/php-1.38.0-wmf.19/index.php(46): wfIndexMain()
#25 /srv/mediawiki/w/index.php(3): require(string)
#26 {main}
Impact

Unclear.

Notes

Noticing a handful of these in 1.38.0-wmf.19 (T293960).

Related to T281714?

Details

Request URL
https://commons.wikimedia.org/w/index.php?title=*&action=submit
Related Changes in Gerrit:
SubjectRepoBranchLines +/-
WikiPage: Simplify added/deleted logic in ::updateCategoryCounts()mediawiki/coremaster+33 -35
WikiPage: Use primary key for updates in ::updateCategoryCountsmediawiki/coremaster+14 -9
Customize query in gerrit

Related Objects

Event Timeline

brennen created this task.Jan 27 2022, 8:36 PM
Restricted Application added a subscriber: Aklapper. · View Herald TranscriptJan 27 2022, 8:36 PM
brennen updated the task description. (Show Details)Jan 27 2022, 8:37 PM
Zabe subscribed.Jan 27 2022, 9:09 PM
Umherirrender subscribed.Jan 27 2022, 9:11 PM

https://gerrit.wikimedia.org/r/c/mediawiki/core/+/754065 would reduce the (concurrent) updates on page moves.

But according to the request url this is from an edit which removes a category from a file page, not from move. So this could be unrelated to the situation.

The impact could be, that one category counter is wrong, which could itself fixing within a month when T299823: Regularly run recountCategories.php on Wikimedia wikis via systemd timer is installed.

brennen moved this task from Backlog to Logs/Train on the User-brennen board.Jan 31 2022, 5:53 PM
Krinkle moved this task from Untriaged to Jan 2022 on the Wikimedia-production-error board.Feb 4 2022, 3:10 AM
Lucas_Werkmeister_WMDE mentioned this in T301434: Wikimedia\Rdbms\DBQueryError: Error 1213: Deadlock found when trying to get lock; try restarting transaction (db1138)Function: WikiPage::updateCategoryCountsQuery: UPDATE `category` SET cat_pages = cat_pages + 1,cat_files = cat_files + 1 WHERE cat_title IN ('Images_from_Deskthority','PD-author','Released_into_the_public_domain_by_the_copyright_holder_missing_SDC_copyright_license') .Feb 10 2022, 3:11 PM
Krinkle merged a task: T301434: Wikimedia\Rdbms\DBQueryError: Error 1213: Deadlock found when trying to get lock; try restarting transaction (db1138)Function: WikiPage::updateCategoryCountsQuery: UPDATE `category` SET cat_pages = cat_pages + 1,cat_files = cat_files + 1 WHERE cat_title IN ('Images_from_Deskthority','PD-author','Released_into_the_public_domain_by_the_copyright_holder_missing_SDC_copyright_license') .Apr 14 2022, 3:35 PM
Krinkle added subscribers: jeena, tstarling, Lucas_Werkmeister_WMDE.
hashar subscribed.May 17 2022, 7:38 AM

One occurrence today with 1.39.0-wmf.10, there are two messages shown for the same reqId:

reqId: 2719cab7-1df6-4c0b-9434-7b78f04fdea3
Find reqId in Logstash

normalized_message
[{reqId}] {exception_url}   Wikimedia\Rdbms\DBQueryError: Error 1213: Deadlock found when trying to get lock; try restarting transaction (db1160)
Function: WikiPage::updateCategoryCounts
Query: UPDATE  `category` SET cat_pages = cat_pages - 1,cat_subcats
exception.trace
from /srv/mediawiki/php-1.39.0-wmf.10/includes/libs/rdbms/database/Database.php(1743)
#0 /srv/mediawiki/php-1.39.0-wmf.10/includes/libs/rdbms/database/Database.php(1727): Wikimedia\Rdbms\Database->getQueryException(string, integer, string, string)
#1 /srv/mediawiki/php-1.39.0-wmf.10/includes/libs/rdbms/database/Database.php(1701): Wikimedia\Rdbms\Database->getQueryExceptionAndLog(string, integer, string, string)
#2 /srv/mediawiki/php-1.39.0-wmf.10/includes/libs/rdbms/database/Database.php(1202): Wikimedia\Rdbms\Database->reportQueryError(string, integer, string, string, boolean)
#3 /srv/mediawiki/php-1.39.0-wmf.10/includes/libs/rdbms/database/Database.php(2603): Wikimedia\Rdbms\Database->query(string, string, integer)
#4 /srv/mediawiki/php-1.39.0-wmf.10/includes/libs/rdbms/database/DBConnRef.php(68): Wikimedia\Rdbms\Database->update(string, array, string, string)
#5 /srv/mediawiki/php-1.39.0-wmf.10/includes/libs/rdbms/database/DBConnRef.php(341): Wikimedia\Rdbms\DBConnRef->__call(string, array)
#6 /srv/mediawiki/php-1.39.0-wmf.10/includes/page/WikiPage.php(3165): Wikimedia\Rdbms\DBConnRef->update(string, array, array, string)
#7 /srv/mediawiki/php-1.39.0-wmf.10/includes/deferred/LinksUpdate/CategoryLinksTable.php(309): WikiPage->updateCategoryCounts(array, array, integer)
#8 /srv/mediawiki/php-1.39.0-wmf.10/includes/deferred/LinksUpdate/CategoryLinksTable.php(275): MediaWiki\Deferred\LinksUpdate\CategoryLinksTable->updateCategoryCounts(array, array)
#9 /srv/mediawiki/php-1.39.0-wmf.10/includes/deferred/LinksUpdate/LinksTable.php(398): MediaWiki\Deferred\LinksUpdate\CategoryLinksTable->finishUpdate()
#10 /srv/mediawiki/php-1.39.0-wmf.10/includes/deferred/LinksUpdate/LinksUpdate.php(294): MediaWiki\Deferred\LinksUpdate\LinksTable->update()
#11 /srv/mediawiki/php-1.39.0-wmf.10/includes/deferred/LinksUpdate/LinksUpdate.php(254): MediaWiki\Deferred\LinksUpdate\LinksUpdate->doIncrementalUpdate()
#12 /srv/mediawiki/php-1.39.0-wmf.10/includes/deferred/DeferredUpdates.php(536): MediaWiki\Deferred\LinksUpdate\LinksUpdate->doUpdate()
#13 /srv/mediawiki/php-1.39.0-wmf.10/includes/deferred/RefreshSecondaryDataUpdate.php(103): DeferredUpdates::attemptUpdate(MediaWiki\Deferred\LinksUpdate\LinksUpdate, Wikimedia\Rdbms\LBFactoryMulti)
#14 /srv/mediawiki/php-1.39.0-wmf.10/includes/deferred/DeferredUpdates.php(536): RefreshSecondaryDataUpdate->doUpdate()
#15 /srv/mediawiki/php-1.39.0-wmf.10/includes/Storage/DerivedPageDataUpdater.php(1783): DeferredUpdates::attemptUpdate(RefreshSecondaryDataUpdate, Wikimedia\Rdbms\LBFactoryMulti)
#16 /srv/mediawiki/php-1.39.0-wmf.10/includes/page/WikiPage.php(2207): MediaWiki\Storage\DerivedPageDataUpdater->doSecondaryDataUpdates(array)
#17 /srv/mediawiki/php-1.39.0-wmf.10/includes/jobqueue/jobs/RefreshLinksJob.php(242): WikiPage->doSecondaryDataUpdates(array)
#18 /srv/mediawiki/php-1.39.0-wmf.10/includes/jobqueue/jobs/RefreshLinksJob.php(163): RefreshLinksJob->runForTitle(Title)
#19 /srv/mediawiki/php-1.39.0-wmf.10/extensions/EventBus/includes/JobExecutor.php(79): RefreshLinksJob->run()
#20 /srv/mediawiki/rpc/RunSingleJob.php(76): MediaWiki\Extension\EventBus\JobExecutor->execute(array)
#21 {main}

And

normalized_message
[{reqId}] {exception_url}   Wikimedia\Rdbms\DBQueryError: Error 1213: Deadlock found when trying to get lock; try restarting transaction (db1160)
Function: WikiPage::updateCategoryCounts
Query: UPDATE  `category` SET cat_pages = cat_pages - 1,cat_subcats
exception.trace
from /srv/mediawiki/php-1.39.0-wmf.10/includes/libs/rdbms/database/Database.php(1743)
#0 /srv/mediawiki/php-1.39.0-wmf.10/includes/libs/rdbms/database/Database.php(1727): Wikimedia\Rdbms\Database->getQueryException(string, integer, string, string)
#1 /srv/mediawiki/php-1.39.0-wmf.10/includes/libs/rdbms/database/Database.php(1701): Wikimedia\Rdbms\Database->getQueryExceptionAndLog(string, integer, string, string)
#2 /srv/mediawiki/php-1.39.0-wmf.10/includes/libs/rdbms/database/Database.php(1202): Wikimedia\Rdbms\Database->reportQueryError(string, integer, string, string, boolean)
#3 /srv/mediawiki/php-1.39.0-wmf.10/includes/libs/rdbms/database/Database.php(2603): Wikimedia\Rdbms\Database->query(string, string, integer)
#4 /srv/mediawiki/php-1.39.0-wmf.10/includes/libs/rdbms/database/DBConnRef.php(68): Wikimedia\Rdbms\Database->update(string, array, string, string)
#5 /srv/mediawiki/php-1.39.0-wmf.10/includes/libs/rdbms/database/DBConnRef.php(341): Wikimedia\Rdbms\DBConnRef->__call(string, array)
#6 /srv/mediawiki/php-1.39.0-wmf.10/includes/page/WikiPage.php(3165): Wikimedia\Rdbms\DBConnRef->update(string, array, array, string)
#7 /srv/mediawiki/php-1.39.0-wmf.10/includes/deferred/LinksUpdate/CategoryLinksTable.php(309): WikiPage->updateCategoryCounts(array, array, integer)
#8 /srv/mediawiki/php-1.39.0-wmf.10/includes/deferred/LinksUpdate/CategoryLinksTable.php(275): MediaWiki\Deferred\LinksUpdate\CategoryLinksTable->updateCategoryCounts(array, array)
#9 /srv/mediawiki/php-1.39.0-wmf.10/includes/deferred/LinksUpdate/LinksTable.php(398): MediaWiki\Deferred\LinksUpdate\CategoryLinksTable->finishUpdate()
#10 /srv/mediawiki/php-1.39.0-wmf.10/includes/deferred/LinksUpdate/LinksUpdate.php(294): MediaWiki\Deferred\LinksUpdate\LinksTable->update()
#11 /srv/mediawiki/php-1.39.0-wmf.10/includes/deferred/LinksUpdate/LinksUpdate.php(254): MediaWiki\Deferred\LinksUpdate\LinksUpdate->doIncrementalUpdate()
#12 /srv/mediawiki/php-1.39.0-wmf.10/includes/deferred/DeferredUpdates.php(536): MediaWiki\Deferred\LinksUpdate\LinksUpdate->doUpdate()
#13 /srv/mediawiki/php-1.39.0-wmf.10/includes/deferred/RefreshSecondaryDataUpdate.php(103): DeferredUpdates::attemptUpdate(MediaWiki\Deferred\LinksUpdate\LinksUpdate, Wikimedia\Rdbms\LBFactoryMulti)
#14 /srv/mediawiki/php-1.39.0-wmf.10/includes/deferred/DeferredUpdates.php(536): RefreshSecondaryDataUpdate->doUpdate()
#15 /srv/mediawiki/php-1.39.0-wmf.10/includes/Storage/DerivedPageDataUpdater.php(1783): DeferredUpdates::attemptUpdate(RefreshSecondaryDataUpdate, Wikimedia\Rdbms\LBFactoryMulti)
#16 /srv/mediawiki/php-1.39.0-wmf.10/includes/page/WikiPage.php(2207): MediaWiki\Storage\DerivedPageDataUpdater->doSecondaryDataUpdates(array)
#17 /srv/mediawiki/php-1.39.0-wmf.10/includes/jobqueue/jobs/RefreshLinksJob.php(242): WikiPage->doSecondaryDataUpdates(array)
#18 /srv/mediawiki/php-1.39.0-wmf.10/includes/jobqueue/jobs/RefreshLinksJob.php(163): RefreshLinksJob->runForTitle(Title)
#19 /srv/mediawiki/php-1.39.0-wmf.10/extensions/EventBus/includes/JobExecutor.php(79): RefreshLinksJob->run()
#20 /srv/mediawiki/rpc/RunSingleJob.php(76): MediaWiki\Extension\EventBus\JobExecutor->execute(array)
#21 {main}

I am guessing due to a retry?

Umherirrender unsubscribed.Jun 19 2022, 7:37 PM
Ladsgroup mentioned this in T306636: DBQueryError: Error 1213: Deadlock found in UserOptionsManager::saveOptionsInternal.Aug 11 2022, 9:22 AM
gerritbot added a comment.Dec 6 2022, 8:02 PM

Change 865164 had a related patch set uploaded (by Umherirrender; author: Umherirrender):

[mediawiki/core@master] WikiPage: Use primary key for updates in ::updateCategoryCounts

https://gerrit.wikimedia.org/r/865164

gerritbot added a project: Patch-For-Review.Dec 6 2022, 8:02 PM
Umherirrender added a comment.Dec 6 2022, 8:32 PM
In T300303#8448445, @gerritbot wrote:

Change 865164 had a related patch set uploaded (by Umherirrender; author: Umherirrender):

[mediawiki/core@master] WikiPage: Use primary key for updates in ::updateCategoryCounts

https://gerrit.wikimedia.org/r/865164

This is just an idea to get an effect without many lines to change.
If that does not help or is not wanted the next step would/could be to use a mergable defered update similiar to how the edit count is handled (UserEditCountUpdate::class), which could collect some needed updates post send and commit all together.

Krinkle renamed this task from DBQueryError: Deadlock found when trying to get lock; try restarting transaction (db1138)Function: WikiPage::updateCategoryCountsQuery: UPDATE `category` SET cat_pages = cat_pages - 1,cat_files = cat_files - 1 WHERE cat_title = '[title]' to Deadlock in WikiPage::updateCategoryCounts query.Feb 16 2023, 10:14 PM
gerritbot added a comment.Feb 16 2023, 10:21 PM

Change 889883 had a related patch set uploaded (by Krinkle; author: Krinkle):

[mediawiki/core@master] WikiPage: Simplify added/deleted logic in ::updateCategoryCounts()

https://gerrit.wikimedia.org/r/889883

gerritbot added a comment.Feb 16 2023, 10:34 PM

Change 865164 merged by jenkins-bot:

[mediawiki/core@master] WikiPage: Use primary key for updates in ::updateCategoryCounts

https://gerrit.wikimedia.org/r/865164

ReleaseTaggerBot added a project: MW-1.40-notes (1.40.0-wmf.24; 2023-02-20).Feb 16 2023, 11:00 PM
gerritbot added a comment.Feb 17 2023, 7:59 PM

Change 889883 merged by jenkins-bot:

[mediawiki/core@master] WikiPage: Simplify added/deleted logic in ::updateCategoryCounts()

https://gerrit.wikimedia.org/r/889883

Umherirrender closed this task as Resolved.Feb 17 2023, 8:09 PM
Umherirrender claimed this task.
Maintenance_bot removed a project: Patch-For-Review.Feb 17 2023, 8:10 PM
Umherirrender mentioned this in T364404: Fatal "DBQueryError: Lock wait timeout exceeded" from WikiPage::updateCategoryCounts after some edits.May 7 2024, 7:16 PM
Krinkle mentioned this in T221795: Refactor Category::refreshCounts logic to a job and simplify.Mar 22 2025, 9:28 AM
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