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Maniphest T217329

bug in 1.33.0-wmf.18+ breaks abstract dumps on testwikidatawiki, among other things | MWContentSerializationException $entityId and $targetId can not be the same
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Description

[08a09c9f4968bff42dd6c232] [no req]   MWContentSerializationException from line 299 of /srv/mediawiki/php-1.33.0-wmf.18/extensions/Wikibase/lib/includes/Store/EntityContentDataCodec.php: $entityId and $targetId can not be the same.

Reproduction case: https://www.wikidata.org/w/api.php?action=query&format=json&prop=revisions&formatversion=2&titles=Lexeme%3AL123&rvprop=content%7Cuser%7Cids&rvlimit=max&continue=%7C%7C&rvcontinue=20190401115845%7C899647120

https://logstash.wikimedia.org/app/discover#/doc/logstash-*/logstash-deploy-2021.06.28?id=UM85U3oB3UDnvh-QHmqq

Req ID: AWk0u32gjSm8tOlx-BX_

Stacktrace for that web request:

from /srv/mediawiki/php-1.37.0-wmf.11/extensions/Wikibase/lib/includes/Store/EntityContentDataCodec.php(300)
#0 /srv/mediawiki/php-1.37.0-wmf.11/extensions/Wikibase/repo/includes/Content/EntityHandler.php(371): Wikibase\Lib\Store\EntityContentDataCodec->decodeRedirect(string, NULL)
#1 /srv/mediawiki/php-1.37.0-wmf.11/includes/Revision/RevisionStore.php(1208): Wikibase\Repo\Content\EntityHandler->unserializeContent(string, NULL)
#2 /srv/mediawiki/php-1.37.0-wmf.11/includes/Revision/RevisionStore.php(1449): MediaWiki\Revision\RevisionStore->loadSlotContent(MediaWiki\Revision\SlotRecord, NULL, NULL, NULL, integer)
#3 [internal function]: MediaWiki\Revision\RevisionStore->MediaWiki\Revision\{closure}(MediaWiki\Revision\SlotRecord)
#4 /srv/mediawiki/php-1.37.0-wmf.11/includes/Revision/SlotRecord.php(324): call_user_func(Closure, MediaWiki\Revision\SlotRecord)
#5 /srv/mediawiki/php-1.37.0-wmf.11/includes/api/ApiQueryRevisionsBase.php(481): MediaWiki\Revision\SlotRecord->getContent()
#6 /srv/mediawiki/php-1.37.0-wmf.11/includes/api/ApiQueryRevisionsBase.php(390): ApiQueryRevisionsBase->extractSlotInfo(MediaWiki\Revision\SlotRecord, integer, NULL)
#7 /srv/mediawiki/php-1.37.0-wmf.11/includes/api/ApiQueryRevisionsBase.php(314): ApiQueryRevisionsBase->extractAllSlotInfo(MediaWiki\Revision\RevisionStoreRecord, integer)
#8 /srv/mediawiki/php-1.37.0-wmf.11/includes/api/ApiQueryRevisions.php(438): ApiQueryRevisionsBase->extractRevisionInfo(MediaWiki\Revision\RevisionStoreRecord, stdClass)
#9 /srv/mediawiki/php-1.37.0-wmf.11/includes/api/ApiQueryRevisionsBase.php(62): ApiQueryRevisions->run()
#10 /srv/mediawiki/php-1.37.0-wmf.11/includes/api/ApiQuery.php(333): ApiQueryRevisionsBase->execute()
#11 /srv/mediawiki/php-1.37.0-wmf.11/includes/api/ApiMain.php(1721): ApiQuery->execute()
#12 /srv/mediawiki/php-1.37.0-wmf.11/includes/api/ApiMain.php(702): ApiMain->executeAction()
#13 /srv/mediawiki/php-1.37.0-wmf.11/includes/api/ApiMain.php(673): ApiMain->executeActionWithErrorHandling()
#14 /srv/mediawiki/php-1.37.0-wmf.11/api.php(90): ApiMain->execute()
#15 /srv/mediawiki/php-1.37.0-wmf.11/api.php(45): wfApiMain()
#16 /srv/mediawiki/w/api.php(3): require(string)
#17 {main}

Note there is also a field exception.previous.trace:

from /srv/mediawiki/php-1.37.0-wmf.11/vendor/wikibase/data-model/src/Entity/EntityRedirect.php(41)
#0 /srv/mediawiki/php-1.37.0-wmf.11/extensions/Wikibase/lib/includes/Store/EntityContentDataCodec.php(297): Wikibase\DataModel\Entity\EntityRedirect->__construct(Wikibase\Lexeme\Domain\Model\LexemeId, Wikibase\Lexeme\Domain\Model\LexemeId)
#1 /srv/mediawiki/php-1.37.0-wmf.11/extensions/Wikibase/repo/includes/Content/EntityHandler.php(371): Wikibase\Lib\Store\EntityContentDataCodec->decodeRedirect(string, NULL)
#2 /srv/mediawiki/php-1.37.0-wmf.11/includes/Revision/RevisionStore.php(1208): Wikibase\Repo\Content\EntityHandler->unserializeContent(string, NULL)
#3 /srv/mediawiki/php-1.37.0-wmf.11/includes/Revision/RevisionStore.php(1449): MediaWiki\Revision\RevisionStore->loadSlotContent(MediaWiki\Revision\SlotRecord, NULL, NULL, NULL, integer)
#4 [internal function]: MediaWiki\Revision\RevisionStore->MediaWiki\Revision\{closure}(MediaWiki\Revision\SlotRecord)
#5 /srv/mediawiki/php-1.37.0-wmf.11/includes/Revision/SlotRecord.php(324): call_user_func(Closure, MediaWiki\Revision\SlotRecord)
#6 /srv/mediawiki/php-1.37.0-wmf.11/includes/api/ApiQueryRevisionsBase.php(481): MediaWiki\Revision\SlotRecord->getContent()
#7 /srv/mediawiki/php-1.37.0-wmf.11/includes/api/ApiQueryRevisionsBase.php(390): ApiQueryRevisionsBase->extractSlotInfo(MediaWiki\Revision\SlotRecord, integer, NULL)
#8 /srv/mediawiki/php-1.37.0-wmf.11/includes/api/ApiQueryRevisionsBase.php(314): ApiQueryRevisionsBase->extractAllSlotInfo(MediaWiki\Revision\RevisionStoreRecord, integer)
#9 /srv/mediawiki/php-1.37.0-wmf.11/includes/api/ApiQueryRevisions.php(438): ApiQueryRevisionsBase->extractRevisionInfo(MediaWiki\Revision\RevisionStoreRecord, stdClass)
#10 /srv/mediawiki/php-1.37.0-wmf.11/includes/api/ApiQueryRevisionsBase.php(62): ApiQueryRevisions->run()
#11 /srv/mediawiki/php-1.37.0-wmf.11/includes/api/ApiQuery.php(333): ApiQueryRevisionsBase->execute()
#12 /srv/mediawiki/php-1.37.0-wmf.11/includes/api/ApiMain.php(1721): ApiQuery->execute()
#13 /srv/mediawiki/php-1.37.0-wmf.11/includes/api/ApiMain.php(702): ApiMain->executeAction()
#14 /srv/mediawiki/php-1.37.0-wmf.11/includes/api/ApiMain.php(673): ApiMain->executeActionWithErrorHandling()
#15 /srv/mediawiki/php-1.37.0-wmf.11/api.php(90): ApiMain->execute()
#16 /srv/mediawiki/php-1.37.0-wmf.11/api.php(45): wfApiMain()
#17 /srv/mediawiki/w/api.php(3): require(string)
#18 {main}

And an older stacktrace from a job runner

trace from jobrunner
#0 /srv/mediawiki/php-1.33.0-wmf.21/extensions/Wikibase/repo/includes/Content/EntityHandler.php(383): Wikibase\Lib\Store\EntityContentDataCodec->decodeRedirect(string, NULL)
#1 /srv/mediawiki/php-1.33.0-wmf.21/includes/Revision/RevisionStore.php(1472): Wikibase\Repo\Content\EntityHandler->unserializeContent(string, NULL)
#2 /srv/mediawiki/php-1.33.0-wmf.21/includes/Revision/RevisionStore.php(1634): MediaWiki\Revision\RevisionStore->loadSlotContent(MediaWiki\Revision\SlotRecord, NULL, NULL, NULL, integer)
#3 [internal function]: Closure$MediaWiki\Revision\RevisionStore::loadSlotRecords(MediaWiki\Revision\SlotRecord)
#4 /srv/mediawiki/php-1.33.0-wmf.21/includes/Revision/SlotRecord.php(307): call_user_func(Closure$MediaWiki\Revision\RevisionStore::loadSlotRecords;828, MediaWiki\Revision\SlotRecord)
#5 /srv/mediawiki/php-1.33.0-wmf.21/includes/Revision/RevisionRecord.php(175): MediaWiki\Revision\SlotRecord->getContent()
#6 /srv/mediawiki/php-1.33.0-wmf.21/includes/Revision.php(923): MediaWiki\Revision\RevisionRecord->getContent(string, integer, NULL)
#7 /srv/mediawiki/php-1.33.0-wmf.21/includes/page/WikiPage.php(809): Revision->getContent(integer, NULL)
#8 /srv/mediawiki/php-1.33.0-wmf.21/extensions/CirrusSearch/includes/Sanity/Checker.php(192): WikiPage->getContent()
#9 /srv/mediawiki/php-1.33.0-wmf.21/extensions/CirrusSearch/includes/Sanity/Checker.php(167): CirrusSearch\Sanity\Checker->checkIfRedirect(WikiPage)
#10 /srv/mediawiki/php-1.33.0-wmf.21/extensions/CirrusSearch/includes/Sanity/Checker.php(133): CirrusSearch\Sanity\Checker->checkExisitingPage(string, integer, WikiPage, array)
#11 /srv/mediawiki/php-1.33.0-wmf.21/extensions/CirrusSearch/includes/Job/CheckerJob.php(214): CirrusSearch\Sanity\Checker->check(array)
#12 /srv/mediawiki/php-1.33.0-wmf.21/extensions/CirrusSearch/includes/Job/Job.php(100): CirrusSearch\Job\CheckerJob->doJob()
#13 /srv/mediawiki/php-1.33.0-wmf.21/extensions/EventBus/includes/JobExecutor.php(65): CirrusSearch\Job\Job->run()
#14 /srv/mediawiki/rpc/RunSingleJob.php(77): JobExecutor->execute(array)
#15 {main}

Impact

  • Some pages cannot be viewed
  • Some API requests fail
  • Some jobs are are aborted mid-way, including CirrusSearch\Job\CheckerJob.

Details

Related Changes in Gerrit:
SubjectRepoBranchLines +/-
redo: don't die producing xml files if rev text export conversion failsmediawiki/coremaster+32 -15
don't die when revision serialization fails during link processingmediawiki/extensions/ActiveAbstractmaster+19 -4
don't die producing xml files if rev text export conversion failsmediawiki/coremaster+6 -1
when revision serialization fails, indicate the error in the xmlmediawiki/extensions/ActiveAbstractmaster+7 -3
Customize query in gerrit

Related Objects

Event Timeline

There are a very large number of changes, so older changes are hidden. Show Older Changes
gerritbot subscribed.Mar 4 2019, 1:50 PM

Change 494219 had a related patch set uploaded (by ArielGlenn; owner: ArielGlenn):
[mediawiki/extensions/ActiveAbstract@master] when revision serialization fails, indicate the error in the xml

https://gerrit.wikimedia.org/r/494219

gerritbot added a project: Patch-For-Review.Mar 4 2019, 1:50 PM
ArielGlenn added a comment.Mar 4 2019, 1:51 PM

Is it possible that the current revision is serialized earlier when the page title is set up? I guess testing will show...

Addshore moved this task from Incoming to Needs Work on the Wikidata-Campsite board.Mar 5 2019, 9:34 AM
Addshore removed a project: Wikibase-Docker-2017+.
Addshore added a project: User-Addshore.
gerritbot added a comment.Mar 5 2019, 9:37 AM

Change 494219 merged by jenkins-bot:
[mediawiki/extensions/ActiveAbstract@master] when revision serialization fails, indicate the error in the xml

https://gerrit.wikimedia.org/r/494219

Addshore moved this task from Needs Work to Blocked / Waiting / External on the Wikidata-Campsite board.Mar 5 2019, 10:00 AM
ReleaseTaggerBot added a project: MW-1.33-notes (1.33.0-wmf.21; 2019-03-12).Mar 5 2019, 5:04 PM
Addshore added a comment.Mar 12 2019, 2:04 PM

How is this looking @ArielGlenn ?

hashar unsubscribed.Mar 12 2019, 2:23 PM
ArielGlenn added a comment.Mar 13 2019, 12:03 PM

No joy. It must be triggered somewhere else too; I've imported the bad rev in a (very) old Wikidata installation and am now doing the update/upgrade dance so I can hack away at it locally.

ArielGlenn added a comment.Mar 13 2019, 11:19 PM

I'll need to catch this in XmlDumpWriter after all. Too bad. dumpTextPass already does the right thing, so we'll do that too.

gerritbot added a comment.Mar 13 2019, 11:20 PM

Change 496348 had a related patch set uploaded (by ArielGlenn; owner: ArielGlenn):
[mediawiki/core@master] don't die producing xml files if rev text export conversion fails

https://gerrit.wikimedia.org/r/496348

ArielGlenn added a comment.Mar 14 2019, 8:10 AM

I've run the abstracts job on testwikidatawiki with the patch deployed manually on one of the snapshot hosts, and it was successful.

Krinkle subscribed.Mar 19 2019, 7:28 PM

(Still seen on 1.33-wmf.21.)

[{exception_id}] {exception_url} MWContentSerializationException from line 299 of /srv/mediawiki/php-1.33.0-wmf.21/extensions/Wikibase/lib/includes/Store/EntityContentDataCodec.php: $entityId and $targetId can not be the same.
  • Request ID: 25be09c77941a6bd1bdcdebd (jobrunner)
  • Request ID (2): XJFCTgpAADgAAD45lNcAAACT (app server)
Krinkle updated the task description. (Show Details)Mar 19 2019, 7:31 PM
Krinkle mentioned this in Blog Post: Production Excellence #8: February 2019.Mar 21 2019, 5:56 PM
Addshore added a project: [DEPRECATED] wdwb-tech.Mar 22 2019, 8:42 AM
gerritbot added a comment.Mar 22 2019, 9:22 AM

Change 496348 merged by jenkins-bot:
[mediawiki/core@master] don't die producing xml files if rev text export conversion fails

https://gerrit.wikimedia.org/r/496348

ReleaseTaggerBot edited projects, added MW-1.33-notes (1.33.0-wmf.23; 2019-03-26); removed MW-1.33-notes (1.33.0-wmf.21; 2019-03-12).Mar 22 2019, 10:01 AM
ArielGlenn added a comment.Mar 22 2019, 4:34 PM

Does XmlDumpWriter need a similar fix at a later stanza? Lines 298, 301 here: https://gerrit.wikimedia.org/r/#/c/mediawiki/core/+/443608/46/includes/export/XmlDumpWriter.php Do we have a wiki configured such that this code path can be tested with a broken revision?

Jdforrester-WMF removed a project: Patch-For-Review.Mar 23 2019, 6:17 PM
ArielGlenn added a comment.Mar 26 2019, 10:01 PM

And in fact that changeset (https://gerrit.wikimedia.org/r/#/c/mediawiki/core/+/443608/) did break this again at exactly the point I asked about above. The new stacktrace:

[0bda89b2b61b164a0232340b] [no req]   MWContentSerializationException from line 299 of /srv/mediawiki/php-1.33.0-wmf.23/extensions/Wikibase/lib/includes/Store/EntityContentDataCodec.php: $entityId and $targetId can not be the same.
Backtrace:
#0 /srv/mediawiki/php-1.33.0-wmf.23/extensions/Wikibase/repo/includes/Content/EntityHandler.php(383): Wikibase\Lib\Store\EntityContentDataCodec->decodeRedirect(string, NULL)
#1 /srv/mediawiki/php-1.33.0-wmf.23/includes/Revision/RevisionStore.php(1472): Wikibase\Repo\Content\EntityHandler->unserializeContent(string, NULL)
#2 /srv/mediawiki/php-1.33.0-wmf.23/includes/Revision/RevisionStore.php(1634): MediaWiki\Revision\RevisionStore->loadSlotContent(MediaWiki\Revision\SlotRecord, NULL, NULL, NULL, integer)
#3 [internal function]: MediaWiki\Revision\RevisionStore->MediaWiki\Revision\{closure}(MediaWiki\Revision\SlotRecord)
#4 /srv/mediawiki/php-1.33.0-wmf.23/includes/Revision/SlotRecord.php(307): call_user_func(Closure, MediaWiki\Revision\SlotRecord)
#5 /srv/mediawiki/php-1.33.0-wmf.23/includes/export/XmlDumpWriter.php(302): MediaWiki\Revision\SlotRecord->getContent()
#6 /srv/mediawiki/php-1.33.0-wmf.23/includes/export/WikiExporter.php(485): XmlDumpWriter->writeRevision(stdClass)
#7 /srv/mediawiki/php-1.33.0-wmf.23/includes/export/WikiExporter.php(445): WikiExporter->outputPageStreamBatch(Wikimedia\Rdbms\ResultWrapper, stdClass)
#8 /srv/mediawiki/php-1.33.0-wmf.23/includes/export/WikiExporter.php(269): WikiExporter->dumpPages(string, boolean)
#9 /srv/mediawiki/php-1.33.0-wmf.23/includes/export/WikiExporter.php(154): WikiExporter->dumpFrom(string, boolean)
#10 /srv/mediawiki/php-1.33.0-wmf.23/maintenance/includes/BackupDumper.php(288): WikiExporter->pagesByRange(integer, integer, boolean)
#11 /srv/mediawiki/php-1.33.0-wmf.23/maintenance/dumpBackup.php(83): BackupDumper->dump(integer, integer)
#12 /srv/mediawiki/php-1.33.0-wmf.23/maintenance/doMaintenance.php(94): DumpBackup->execute()
#13 /srv/mediawiki/php-1.33.0-wmf.23/maintenance/dumpBackup.php(138): require_once(string)
#14 /srv/mediawiki/multiversion/MWScript.php(100): require_once(string)
#15 {main}

I'll look at it tomorrow and put up a patch if someone else hasn't gotten to it by then.

ArielGlenn added a comment.Mar 27 2019, 7:35 AM

Fixing me that gives me a failure later on:

2019-03-27 07:25:10: testwikidatawiki (ID 54422) 6 pages (32.9|363.6/sec all|curr), 7 revs (38.4|60.6/sec all|curr), ETA 2019-03-27 09:29:56 [max 287591]
[e1818746fd28c6a70c6cf5a5] [no req]   MWContentSerializationException from line 299 of /srv/mediawiki/php-1.33.0-wmf.23/extensions/Wikibase/lib/includes/Store/EntityContentDataCodec.php: $entityId and $targetId can not be the same.
Backtrace:
#0 /srv/mediawiki/php-1.33.0-wmf.23/extensions/Wikibase/repo/includes/Content/EntityHandler.php(383): Wikibase\Lib\Store\EntityContentDataCodec->decodeRedirect(string, NULL)
#1 /srv/mediawiki/php-1.33.0-wmf.23/includes/Revision/RevisionStore.php(1472): Wikibase\Repo\Content\EntityHandler->unserializeContent(string, NULL)
#2 /srv/mediawiki/php-1.33.0-wmf.23/includes/Revision/RevisionStore.php(1634): MediaWiki\Revision\RevisionStore->loadSlotContent(MediaWiki\Revision\SlotRecord, NULL, NULL, NULL, integer)
#3 [internal function]: MediaWiki\Revision\RevisionStore->MediaWiki\Revision\{closure}(MediaWiki\Revision\SlotRecord)
#4 /srv/mediawiki/php-1.33.0-wmf.23/includes/Revision/SlotRecord.php(307): call_user_func(Closure, MediaWiki\Revision\SlotRecord)
#5 /srv/mediawiki/php-1.33.0-wmf.23/includes/Revision/RevisionRecord.php(175): MediaWiki\Revision\SlotRecord->getContent()
#6 /srv/mediawiki/php-1.33.0-wmf.23/includes/Revision.php(1086): MediaWiki\Revision\RevisionRecord->getContent(string)
#7 /srv/mediawiki/php-1.33.0-wmf.23/extensions/ActiveAbstract/AbstractFilter.php(250): Revision::getRevisionText(stdClass)
#8 /srv/mediawiki/php-1.33.0-wmf.23/extensions/ActiveAbstract/AbstractFilter.php(129): AbstractFilter->sectionLinks(stdClass)
#9 /srv/mediawiki/php-1.33.0-wmf.23/includes/export/DumpFilter.php(81): AbstractFilter->writeClosePage(string)
#10 /srv/mediawiki/php-1.33.0-wmf.23/includes/export/ExportProgressFilter.php(39): DumpFilter->writeClosePage(string)
#11 /srv/mediawiki/php-1.33.0-wmf.23/includes/export/WikiExporter.php(480): ExportProgressFilter->writeClosePage(string)
#12 /srv/mediawiki/php-1.33.0-wmf.23/includes/export/WikiExporter.php(445): WikiExporter->outputPageStreamBatch(Wikimedia\Rdbms\ResultWrapper, stdClass)
#13 /srv/mediawiki/php-1.33.0-wmf.23/includes/export/WikiExporter.php(269): WikiExporter->dumpPages(string, boolean)
#14 /srv/mediawiki/php-1.33.0-wmf.23/includes/export/WikiExporter.php(154): WikiExporter->dumpFrom(string, boolean)
#15 /srv/mediawiki/php-1.33.0-wmf.23/maintenance/includes/BackupDumper.php(288): WikiExporter->pagesByRange(integer, integer, boolean)
#16 /srv/mediawiki/php-1.33.0-wmf.23/maintenance/dumpBackup.php(83): BackupDumper->dump(integer, integer)
#17 /srv/mediawiki/php-1.33.0-wmf.23/maintenance/doMaintenance.php(94): DumpBackup->execute()
#18 /srv/mediawiki/php-1.33.0-wmf.23/maintenance/dumpBackup.php(138): require_once(string)
#19 /srv/mediawiki/multiversion/MWScript.php(100): require_once(string)
#20 {main}
gerritbot added a comment.Mar 27 2019, 7:42 AM

Change 499402 had a related patch set uploaded (by ArielGlenn; owner: ArielGlenn):
[mediawiki/core@master] redo: don't die producing xml files if rev text export conversion fails

https://gerrit.wikimedia.org/r/499402

gerritbot added a project: Patch-For-Review.Mar 27 2019, 7:42 AM

Change 499403 had a related patch set uploaded (by ArielGlenn; owner: ArielGlenn):
[mediawiki/extensions/ActiveAbstract@master] don't die when revision serialization fails during link processing

https://gerrit.wikimedia.org/r/499403

ArielGlenn added a comment.Mar 27 2019, 8:18 AM

I dislike both of the above patches and I don't have better ideas. I've run the abstracts job with these patches applied just to get the dump file produced for this run.

ArielGlenn added a subscriber: daniel.Apr 1 2019, 10:25 AM

I've added @Addshore and @daniel to the patches to have a look. I've run the abstracts manually for this one wiki for the last two runs; if we could get this fixed up by the 20th I can avoid it a fourth time ;-)

daniel added a comment.Apr 1 2019, 11:07 AM

If I understand correctly, the presence of these errors indicates invalid data in the database. This should not just be ignored. On the other hand, MediaWiki should not fatal out either. I suspect that the same error would not just occur while generating dumps, but also when trying to view the respective revision?

In general, exception handling should happen as close to the UI as possible. For bulk operations like dump generation, that is of course inconvenient, since it would abort the dump. Exceptions should be caught in a way that allows dump generation to proceed, but the exception should be reported to the user somehow, both on the CLI as well as on Special:Export.

daniel added a comment.Apr 1 2019, 11:09 AM

By the way: $entityId and $targetId can not be the same is somewhat alarming. It indicates that an invalid entity redirect exists in the database of testwikidatawiki. I wonder how that happened.

ArielGlenn added a comment.Apr 1 2019, 11:15 AM
In T217329#5073668, @daniel wrote:

By the way: $entityId and $targetId can not be the same is somewhat alarming. It indicates that an invalid entity redirect exists in the database of testwikidatawiki. I wonder how that happened.

Someone entered it for testing, I imagine. But it cannot now be deleted. And in any case the code should be resilient against these sorts of errors.

If I understand correctly, the presence of these errors indicates invalid data in the database. This should not just be ignored. On the other hand, MediaWiki should not fatal out either. I suspect that the same error would not just occur while generating dumps, but also when trying to view the respective revision?

It does; that's mentioned above (see Impact in the task description. But I don't want to try to fix MW generally. The dumps scripts should handle any errors thrown at them by MW core, and I'll be updating the patches accordingly, thanks for your comments.

daniel added projects: Platform Engineering (MCR), Platform Team Legacy, Multi-Content-Revisions.Apr 1 2019, 1:20 PM
daniel moved this task from Inbox to Watching / External on the Platform Team Legacy board.
daniel edited projects, added Platform Team Legacy (Watching / External); removed Platform Team Legacy.
Krinkle unsubscribed.Apr 1 2019, 3:39 PM
Leaderboard moved this task from Feb2020/1.35-wmf.18 to Sep2019/1.34.wmf.21+ on the Wikimedia-production-error board.Apr 3 2019, 10:30 AM
Leaderboard moved this task from Sep2019/1.34.wmf.21+ to Feb 2019 / 1.33.wmf16+ on the Wikimedia-production-error board.
gerritbot added a comment.Apr 8 2019, 6:55 PM

Change 499402 merged by jenkins-bot:
[mediawiki/core@master] redo: don't die producing xml files if rev text export conversion fails

https://gerrit.wikimedia.org/r/499402

gerritbot added a comment.Apr 8 2019, 6:55 PM

Change 499403 merged by jenkins-bot:
[mediawiki/extensions/ActiveAbstract@master] don't die when revision serialization fails during link processing

https://gerrit.wikimedia.org/r/499403

ReleaseTaggerBot edited projects, added MW-1.33-notes (1.33.0-wmf.25; 2019-04-09); removed MW-1.33-notes (1.33.0-wmf.23; 2019-03-26).Apr 8 2019, 7:01 PM
ArielGlenn mentioned this in T221086: Apr 1 2019 and/or >=1.33-wmf.23 dump run issues.Apr 16 2019, 1:40 PM
Krinkle mentioned this in Blog Post: Production Excellence #9: March 2019.Apr 21 2019, 6:51 PM
• CCicalese_WMF moved this task from Inbox to Watching on the Multi-Content-Revisions board.Apr 26 2019, 3:55 PM
Krinkle removed projects: MW-1.33-notes (1.33.0-wmf.25; 2019-04-09), Patch-For-Review.May 6 2019, 5:56 PM
Krinkle added a comment.May 6 2019, 6:00 PM

@ArielGlenn Is this resolved?

ArielGlenn added a comment.May 6 2019, 6:19 PM

Fixed for dumps but not within MediaWiki, i.e. https://test.wikidata.org/w/index.php?title=Q193394&redirect=no still gives an error. The bad entry needs to be removed or MW should do something nicer about such entries.

Addshore added a comment.May 13 2019, 11:52 PM

As this is just test wiki (and not a real wiki), and that this can no longer occur, perhaps we should just totally nuke the page from the db

ArielGlenn added a comment.May 14 2019, 4:39 AM

I'm fine with that approach.

Krinkle added a comment.Jun 5 2019, 9:56 AM

Still seen on 1.34-wmf.8.

  • XPam4gpAICsAAEeT0uEAAAAR
  • GET testwikidatawiki /w/index.php?title=Q193394&redirect=no

Fatal exception: MWContentSerializationException from line 299 of /srv/mediawiki/php-1.34.0-wmf.8/extensions/Wikibase/lib/includes/Store/EntityContentDataCodec.php: $entityId and $targetId can not be the same.

Addshore closed this task as Resolved.Jun 30 2019, 5:11 PM
Addshore claimed this task.

So, I tried deleting in the UI and also with deleteBatch, but both failed with exceptions but deleteBatch seemed to actually do the delete.

I have restored the first revision of the entity, and made a new revision linking to this ticket, and have protected the item.
I guess we should no longer see these exceptions for this item (unless someone goes and restores those revisions, which they should not).

So closing this!

daniel unsubscribed.Jun 30 2019, 9:15 PM
ArielGlenn moved this task from Active to Done on the Dumps-Generation board.Jul 20 2019, 5:23 AM
ArielGlenn mentioned this in T228614: stubs dumps broken for wikidatawiki with old revision for an entity redirecting to self; content read for every revision in stubs!.Jul 22 2019, 5:53 AM
ArielGlenn reopened this task as Open.Jul 22 2019, 8:23 AM
ArielGlenn lowered the priority of this task from High to Medium.

Re-opening for the underlying issue ( bad revision redirect). See https://www.wikidata.org/w/index.php?title=Q4672180&oldid=410362640 Same stack trace in Wikibase, see T228614#5352340

Krinkle moved this task from Feb 2019 / 1.33.wmf16+ to Older on the Wikimedia-production-error board.Jul 26 2019, 4:13 PM
• CCicalese_WMF removed a project: Platform Team Legacy (Watching / External).Jul 26 2019, 5:43 PM
• WDoranWMF moved this task from MCR to mop on the Platform Engineering board.Jul 26 2019, 6:39 PM
• WDoranWMF edited projects, added Core Platform Team Initiatives (MCR); removed Platform Engineering (MCR).
ArielGlenn moved this task from Done to Blocked/Stalled/Waiting for event on the Dumps-Generation board.Jul 29 2019, 3:28 PM
Addshore added a comment.Aug 8 2019, 3:28 PM

@ArielGlenn do I understand correctly however that this revision on wikidata.org is not an issue for dumps?

We probably don't want to delete the revision from wikidata.org.
A nice way to handle this in the UI might be to just accept the fact that the deserializes do not deserialize the revision and display the entity JSON instead.
Alternatively we could poke the deserializers to allow redirecting to ones self, but really this should never have been possible, but maybe there is somewhere else we could put the check..

ArielGlenn added a comment.Aug 8 2019, 4:33 PM

The python scripts at the dump end are (mostly) protected against exceptions from MediaWiki generally and from this failure case in particular. Since we have problematic data in production I've re-opened the ticket so that the WikiBase issue can somehow be resolved.

Addshore added a subscriber: • alaa_wmde.Aug 9 2019, 7:13 PM
Addshore added a comment.Aug 9 2019, 7:16 PM

It's a shame we have cases of self redirects already in history that we have to try to deal with.

@alaa_wmde thoughts?
basically when coming from storage, we want to allow deserialization and serialization.
when coming from a user we want to disallow it.
Then when we load such cases from storage to display to users in JSON we can just show them the JSON, and when displaying them the UI we can show them a page stating that this revision of the entity is invalid.

awight moved this task from Watching to Tech Debt on the Multi-Content-Revisions board.Aug 15 2019, 4:01 PM
awight edited projects, added Multi-Content-Revisions (Tech Debt); removed Multi-Content-Revisions.
• mmodell changed the subtype of this task from "Task" to "Production Error".Aug 28 2019, 11:07 PM
Addshore removed Addshore as the assignee of this task.Oct 30 2019, 1:54 PM
Addshore moved this task from incoming to needs discussion or investigation on the Wikidata board.
• Pablo-WMDE subscribed.Oct 30 2019, 1:57 PM
Addshore moved this task from Unsorted 💣 to Back Burner 🏛️ on the User-Addshore board.Nov 22 2019, 12:48 PM
Krinkle added a comment.May 19 2020, 10:40 PM

Seen on www.wikidata.org as well.

  • reqId: 4a83c7b9-dff6-4185-9a7d-b9dac050a1ab
  • reqId: a0bb4945-e080-4b41-a402-4c0edb562eff
  • reqId: 081d5f57-ff6a-4f29-9971-fa722d7eae6b
  • reqId: df03dd06-c3cd-4853-b04a-dba00183800f
wikidatawiki /w/api.php?action=query&format=json&prop=revisions&formatversion=2&titles=Lexeme%3AL123&rvprop=content%7Cuser%7Cids&rvlimit=max&continue=%7C%7C&rvcontinue=20190401115845%7C899647120

MWContentSerializationException from line 299 of /srv/mediawiki/php-1.35.0-wmf.31/extensions/Wikibase/lib/includes/Store/EntityContentDataCodec.php: $entityId and $targetId can not be the same.
Addshore moved this task from Inbox to Legacy Inbox on the [DEPRECATED] wdwb-tech board.Mar 17 2021, 5:19 PM
Addshore removed a project: Wikidata-Campsite.Apr 22 2021, 4:07 PM
Addshore moved this task from Legacy Inbox to Inbox on the [DEPRECATED] wdwb-tech board.Jun 28 2021, 2:53 PM
Addshore moved this task from Inbox to To Prioritize on the [DEPRECATED] wdwb-tech board.Jun 28 2021, 3:26 PM

This is seemingly very re-producable right now https://www.wikidata.org/w/api.php?action=query&format=json&prop=revisions&formatversion=2&titles=Lexeme%3AL123&rvprop=content%7Cuser%7Cids&rvlimit=max&continue=%7C%7C&rvcontinue=20190401115845%7C899647120

Addshore updated the task description. (Show Details)Jun 28 2021, 3:26 PM
Addshore renamed this task from bug in 1.33.0-wmf.18 breaks abstract dumps on testwikidatawiki | MWContentSerializationException $entityId and $targetId can not be the same to bug in 1.33.0-wmf.18+ breaks abstract dumps on testwikidatawiki, among other things | MWContentSerializationException $entityId and $targetId can not be the same.Jun 28 2021, 3:29 PM
Addshore updated the task description. (Show Details)
Addshore lowered the priority of this task from Medium to Low.Aug 31 2021, 11:24 AM
Addshore moved this task from To Prioritize to Triaged Low (0-50) on the [DEPRECATED] wdwb-tech board.
Addshore unsubscribed.Jun 27 2023, 12:43 PM
Michael mentioned this in T349230: [SW] [LEX] [TECH] MWContentSerializationException: $entityId (L123) and $targetId can not be the same..Oct 18 2023, 7:41 PM
Lucas_Werkmeister_WMDE added a comment.Oct 24 2023, 2:05 PM
In T217329#7181299, Addshore wrote:

This is seemingly very re-producable right now https://www.wikidata.org/w/api.php?action=query&format=json&prop=revisions&formatversion=2&titles=Lexeme%3AL123&rvprop=content%7Cuser%7Cids&rvlimit=max&continue=%7C%7C&rvcontinue=20190401115845%7C899647120

Now only reproducible if you’re logged in – I deleted the broken revision (T349230#9276324).

I think we can probably close this task together with T349230?

Reedy subscribed.Mar 3 2025, 12:12 AM
Error
normalized_message
[{reqId}] {exception_url}   MWContentSerializationException: $entityId (L99) and $targetId can not be the same.
FrameLocationCall
from/srv/mediawiki/php-1.44.0-wmf.18/extensions/Wikibase/lib/includes/Store/EntityContentDataCodec.php(298)
#0/srv/mediawiki/php-1.44.0-wmf.18/extensions/Wikibase/repo/includes/Content/EntityHandler.php(391)Wikibase\Lib\Store\EntityContentDataCodec->decodeRedirect(string, null)
#1/srv/mediawiki/php-1.44.0-wmf.18/includes/Revision/RevisionStore.php(1242)Wikibase\Repo\Content\EntityHandler->unserializeContent(string, null)
#2/srv/mediawiki/php-1.44.0-wmf.18/includes/Revision/RevisionStore.php(1522)MediaWiki\Revision\RevisionStore->loadSlotContent(MediaWiki\Revision\SlotRecord, null, null, null, int)
#3/srv/mediawiki/php-1.44.0-wmf.18/includes/Revision/SlotRecord.php(324)MediaWiki\Revision\RevisionStore->MediaWiki\Revision\{closure}(MediaWiki\Revision\SlotRecord)
#4/srv/mediawiki/php-1.44.0-wmf.18/includes/Revision/RevisionRecord.php(221)MediaWiki\Revision\SlotRecord->getContent()
#5/srv/mediawiki/php-1.44.0-wmf.18/includes/Revision/RenderedRevision.php(230)MediaWiki\Revision\RevisionRecord->getContentOrThrow(string, int, null)
#6/srv/mediawiki/php-1.44.0-wmf.18/includes/Revision/RevisionRenderer.php(236)MediaWiki\Revision\RenderedRevision->getSlotParserOutput(string, array)
#7/srv/mediawiki/php-1.44.0-wmf.18/includes/Revision/RevisionRenderer.php(169)MediaWiki\Revision\RevisionRenderer->combineSlotOutput(MediaWiki\Revision\RenderedRevision, MediaWiki\Parser\ParserOptions, array)
#8/srv/mediawiki/php-1.44.0-wmf.18/includes/Revision/RenderedRevision.php(196)MediaWiki\Revision\RevisionRenderer->MediaWiki\Revision\{closure}(MediaWiki\Revision\RenderedRevision, array)
#9/srv/mediawiki/php-1.44.0-wmf.18/includes/poolcounter/PoolWorkArticleView.php(106)MediaWiki\Revision\RenderedRevision->getRevisionParserOutput()
#10/srv/mediawiki/php-1.44.0-wmf.18/includes/poolcounter/PoolWorkArticleViewOld.php(81)MediaWiki\PoolCounter\PoolWorkArticleView->renderRevision(null, bool, string)
#11/srv/mediawiki/php-1.44.0-wmf.18/includes/poolcounter/PoolCounterWork.php(171)MediaWiki\PoolCounter\PoolWorkArticleViewOld->doWork()
#12/srv/mediawiki/php-1.44.0-wmf.18/includes/page/ParserOutputAccess.php(369)MediaWiki\PoolCounter\PoolCounterWork->execute()
#13/srv/mediawiki/php-1.44.0-wmf.18/includes/page/Article.php(830)MediaWiki\Page\ParserOutputAccess->getParserOutput(WikiPage, MediaWiki\Parser\ParserOptions, MediaWiki\Revision\RevisionStoreRecord, int)
#14/srv/mediawiki/php-1.44.0-wmf.18/includes/page/Article.php(546)Article->generateContentOutput(MediaWiki\User\User, MediaWiki\Parser\ParserOptions, int, MediaWiki\Output\OutputPage, array)
#15/srv/mediawiki/php-1.44.0-wmf.18/extensions/Wikibase/repo/includes/Actions/ViewEntityAction.php(80)Article->view()
#16/srv/mediawiki/php-1.44.0-wmf.18/extensions/Wikibase/repo/includes/Actions/ViewEntityAction.php(55)Wikibase\Repo\Actions\ViewEntityAction->showEntityPage()
#17/srv/mediawiki/php-1.44.0-wmf.18/extensions/WikibaseLexeme/src/MediaWiki/Actions/ViewLexemeAction.php(17)Wikibase\Repo\Actions\ViewEntityAction->show()
#18/srv/mediawiki/php-1.44.0-wmf.18/includes/actions/ActionEntryPoint.php(732)Wikibase\Lexeme\MediaWiki\Actions\ViewLexemeAction->show()
#19/srv/mediawiki/php-1.44.0-wmf.18/includes/actions/ActionEntryPoint.php(509)MediaWiki\Actions\ActionEntryPoint->performAction(Article, MediaWiki\Title\Title)
#20/srv/mediawiki/php-1.44.0-wmf.18/includes/actions/ActionEntryPoint.php(145)MediaWiki\Actions\ActionEntryPoint->performRequest()
#21/srv/mediawiki/php-1.44.0-wmf.18/includes/MediaWikiEntryPoint.php(202)MediaWiki\Actions\ActionEntryPoint->execute()
#22/srv/mediawiki/php-1.44.0-wmf.18/index.php(58)MediaWiki\MediaWikiEntryPoint->run()
#23/srv/mediawiki/w/index.php(3)require(string)
#24{main}
exception.previous.trace
from /srv/mediawiki/php-1.44.0-wmf.18/extensions/Wikibase/lib/packages/wikibase/data-model/src/Entity/EntityRedirect.php(41)
#0 /srv/mediawiki/php-1.44.0-wmf.18/extensions/Wikibase/lib/includes/Store/EntityContentDataCodec.php(295): Wikibase\DataModel\Entity\EntityRedirect->__construct(Wikibase\Lexeme\Domain\Model\LexemeId, Wikibase\Lexeme\Domain\Model\LexemeId)
#1 /srv/mediawiki/php-1.44.0-wmf.18/extensions/Wikibase/repo/includes/Content/EntityHandler.php(391): Wikibase\Lib\Store\EntityContentDataCodec->decodeRedirect(string, null)
#2 /srv/mediawiki/php-1.44.0-wmf.18/includes/Revision/RevisionStore.php(1242): Wikibase\Repo\Content\EntityHandler->unserializeContent(string, null)
#3 /srv/mediawiki/php-1.44.0-wmf.18/includes/Revision/RevisionStore.php(1522): MediaWiki\Revision\RevisionStore->loadSlotContent(MediaWiki\Revision\SlotRecord, null, null, null, int)
#4 /srv/mediawiki/php-1.44.0-wmf.18/includes/Revision/SlotRecord.php(324): MediaWiki\Revision\RevisionStore->MediaWiki\Revision\{closure}(MediaWiki\Revision\SlotRecord)
#5 /srv/mediawiki/php-1.44.0-wmf.18/includes/Revision/RevisionRecord.php(221): MediaWiki\Revision\SlotRecord->getContent()
#6 /srv/mediawiki/php-1.44.0-wmf.18/includes/Revision/RenderedRevision.php(230): MediaWiki\Revision\RevisionRecord->getContentOrThrow(string, int, null)
#7 /srv/mediawiki/php-1.44.0-wmf.18/includes/Revision/RevisionRenderer.php(236): MediaWiki\Revision\RenderedRevision->getSlotParserOutput(string, array)
#8 /srv/mediawiki/php-1.44.0-wmf.18/includes/Revision/RevisionRenderer.php(169): MediaWiki\Revision\RevisionRenderer->combineSlotOutput(MediaWiki\Revision\RenderedRevision, MediaWiki\Parser\ParserOptions, array)
#9 /srv/mediawiki/php-1.44.0-wmf.18/includes/Revision/RenderedRevision.php(196): MediaWiki\Revision\RevisionRenderer->MediaWiki\Revision\{closure}(MediaWiki\Revision\RenderedRevision, array)
#10 /srv/mediawiki/php-1.44.0-wmf.18/includes/poolcounter/PoolWorkArticleView.php(106): MediaWiki\Revision\RenderedRevision->getRevisionParserOutput()
#11 /srv/mediawiki/php-1.44.0-wmf.18/includes/poolcounter/PoolWorkArticleViewOld.php(81): MediaWiki\PoolCounter\PoolWorkArticleView->renderRevision(null, bool, string)
#12 /srv/mediawiki/php-1.44.0-wmf.18/includes/poolcounter/PoolCounterWork.php(171): MediaWiki\PoolCounter\PoolWorkArticleViewOld->doWork()
#13 /srv/mediawiki/php-1.44.0-wmf.18/includes/page/ParserOutputAccess.php(369): MediaWiki\PoolCounter\PoolCounterWork->execute()
#14 /srv/mediawiki/php-1.44.0-wmf.18/includes/page/Article.php(830): MediaWiki\Page\ParserOutputAccess->getParserOutput(WikiPage, MediaWiki\Parser\ParserOptions, MediaWiki\Revision\RevisionStoreRecord, int)
#15 /srv/mediawiki/php-1.44.0-wmf.18/includes/page/Article.php(546): Article->generateContentOutput(MediaWiki\User\User, MediaWiki\Parser\ParserOptions, int, MediaWiki\Output\OutputPage, array)
#16 /srv/mediawiki/php-1.44.0-wmf.18/extensions/Wikibase/repo/includes/Actions/ViewEntityAction.php(80): Article->view()
#17 /srv/mediawiki/php-1.44.0-wmf.18/extensions/Wikibase/repo/includes/Actions/ViewEntityAction.php(55): Wikibase\Repo\Actions\ViewEntityAction->showEntityPage()
#18 /srv/mediawiki/php-1.44.0-wmf.18/extensions/WikibaseLexeme/src/MediaWiki/Actions/ViewLexemeAction.php(17): Wikibase\Repo\Actions\ViewEntityAction->show()
#19 /srv/mediawiki/php-1.44.0-wmf.18/includes/actions/ActionEntryPoint.php(732): Wikibase\Lexeme\MediaWiki\Actions\ViewLexemeAction->show()
#20 /srv/mediawiki/php-1.44.0-wmf.18/includes/actions/ActionEntryPoint.php(509): MediaWiki\Actions\ActionEntryPoint->performAction(Article, MediaWiki\Title\Title)
#21 /srv/mediawiki/php-1.44.0-wmf.18/includes/actions/ActionEntryPoint.php(145): MediaWiki\Actions\ActionEntryPoint->performRequest()
#22 /srv/mediawiki/php-1.44.0-wmf.18/includes/MediaWikiEntryPoint.php(202): MediaWiki\Actions\ActionEntryPoint->execute()
#23 /srv/mediawiki/php-1.44.0-wmf.18/index.php(58): MediaWiki\MediaWikiEntryPoint->run()
#24 /srv/mediawiki/w/index.php(3): require(string)
#25 {main}
Impact
Notes

It's from test.wikidata.org...

/w/index.php?direction=prev&oldid=461958&title=Lexeme:L99   MWContentSerializationException: $entityId (L99) and $targetId can not be the same.
Reedy added a comment.Mar 22 2025, 12:11 AM
Error
normalized_message
[{reqId}] {exception_url}   MWContentSerializationException: $entityId (L137) and $targetId can not be the same.
FrameLocationCall
from/srv/mediawiki/php-1.44.0-wmf.21/extensions/Wikibase/lib/includes/Store/EntityContentDataCodec.php(298)
#0/srv/mediawiki/php-1.44.0-wmf.21/extensions/Wikibase/repo/includes/Content/EntityHandler.php(393)Wikibase\Lib\Store\EntityContentDataCodec->decodeRedirect(string, null)
#1/srv/mediawiki/php-1.44.0-wmf.21/includes/Revision/RevisionStore.php(1240)Wikibase\Repo\Content\EntityHandler->unserializeContent(string, null)
#2/srv/mediawiki/php-1.44.0-wmf.21/includes/Revision/RevisionStore.php(1520)MediaWiki\Revision\RevisionStore->loadSlotContent(MediaWiki\Revision\SlotRecord, null, null, null, int)
#3/srv/mediawiki/php-1.44.0-wmf.21/includes/Revision/SlotRecord.php(324)MediaWiki\Revision\RevisionStore->MediaWiki\Revision\{closure}(MediaWiki\Revision\SlotRecord)
#4/srv/mediawiki/php-1.44.0-wmf.21/includes/diff/DifferenceEngine.php(402)MediaWiki\Revision\SlotRecord->getContent()
#5/srv/mediawiki/php-1.44.0-wmf.21/includes/diff/DifferenceEngine.php(375)DifferenceEngine->loadSingleSlot(MediaWiki\Revision\SlotRecord, string)
#6/srv/mediawiki/php-1.44.0-wmf.21/includes/diff/DifferenceEngine.php(1026)DifferenceEngine->getSlotContents()
#7/srv/mediawiki/php-1.44.0-wmf.21/includes/page/Article.php(1067)DifferenceEngine->showDiffPage(bool)
#8/srv/mediawiki/php-1.44.0-wmf.21/includes/page/Article.php(482)Article->showDiffPage()
#9/srv/mediawiki/php-1.44.0-wmf.21/extensions/Wikibase/repo/includes/Actions/ViewEntityAction.php(80)Article->view()
#10/srv/mediawiki/php-1.44.0-wmf.21/extensions/Wikibase/repo/includes/Actions/ViewEntityAction.php(55)Wikibase\Repo\Actions\ViewEntityAction->showEntityPage()
#11/srv/mediawiki/php-1.44.0-wmf.21/extensions/WikibaseLexeme/src/MediaWiki/Actions/ViewLexemeAction.php(17)Wikibase\Repo\Actions\ViewEntityAction->show()
#12/srv/mediawiki/php-1.44.0-wmf.21/includes/actions/ActionEntryPoint.php(730)Wikibase\Lexeme\MediaWiki\Actions\ViewLexemeAction->show()
#13/srv/mediawiki/php-1.44.0-wmf.21/includes/actions/ActionEntryPoint.php(507)MediaWiki\Actions\ActionEntryPoint->performAction(Article, MediaWiki\Title\Title)
#14/srv/mediawiki/php-1.44.0-wmf.21/includes/actions/ActionEntryPoint.php(145)MediaWiki\Actions\ActionEntryPoint->performRequest()
#15/srv/mediawiki/php-1.44.0-wmf.21/includes/MediaWikiEntryPoint.php(202)MediaWiki\Actions\ActionEntryPoint->execute()
#16/srv/mediawiki/php-1.44.0-wmf.21/index.php(58)MediaWiki\MediaWikiEntryPoint->run()
#17/srv/mediawiki/w/index.php(3)require(string)
#18{main}
exception.previous.trace
from /srv/mediawiki/php-1.44.0-wmf.21/extensions/Wikibase/lib/packages/wikibase/data-model/src/Entity/EntityRedirect.php(41)
#0 /srv/mediawiki/php-1.44.0-wmf.21/extensions/Wikibase/lib/includes/Store/EntityContentDataCodec.php(295): Wikibase\DataModel\Entity\EntityRedirect->__construct(Wikibase\Lexeme\Domain\Model\LexemeId, Wikibase\Lexeme\Domain\Model\LexemeId)
#1 /srv/mediawiki/php-1.44.0-wmf.21/extensions/Wikibase/repo/includes/Content/EntityHandler.php(393): Wikibase\Lib\Store\EntityContentDataCodec->decodeRedirect(string, null)
#2 /srv/mediawiki/php-1.44.0-wmf.21/includes/Revision/RevisionStore.php(1240): Wikibase\Repo\Content\EntityHandler->unserializeContent(string, null)
#3 /srv/mediawiki/php-1.44.0-wmf.21/includes/Revision/RevisionStore.php(1520): MediaWiki\Revision\RevisionStore->loadSlotContent(MediaWiki\Revision\SlotRecord, null, null, null, int)
#4 /srv/mediawiki/php-1.44.0-wmf.21/includes/Revision/SlotRecord.php(324): MediaWiki\Revision\RevisionStore->MediaWiki\Revision\{closure}(MediaWiki\Revision\SlotRecord)
#5 /srv/mediawiki/php-1.44.0-wmf.21/includes/diff/DifferenceEngine.php(402): MediaWiki\Revision\SlotRecord->getContent()
#6 /srv/mediawiki/php-1.44.0-wmf.21/includes/diff/DifferenceEngine.php(375): DifferenceEngine->loadSingleSlot(MediaWiki\Revision\SlotRecord, string)
#7 /srv/mediawiki/php-1.44.0-wmf.21/includes/diff/DifferenceEngine.php(1026): DifferenceEngine->getSlotContents()
#8 /srv/mediawiki/php-1.44.0-wmf.21/includes/page/Article.php(1067): DifferenceEngine->showDiffPage(bool)
#9 /srv/mediawiki/php-1.44.0-wmf.21/includes/page/Article.php(482): Article->showDiffPage()
#10 /srv/mediawiki/php-1.44.0-wmf.21/extensions/Wikibase/repo/includes/Actions/ViewEntityAction.php(80): Article->view()
#11 /srv/mediawiki/php-1.44.0-wmf.21/extensions/Wikibase/repo/includes/Actions/ViewEntityAction.php(55): Wikibase\Repo\Actions\ViewEntityAction->showEntityPage()
#12 /srv/mediawiki/php-1.44.0-wmf.21/extensions/WikibaseLexeme/src/MediaWiki/Actions/ViewLexemeAction.php(17): Wikibase\Repo\Actions\ViewEntityAction->show()
#13 /srv/mediawiki/php-1.44.0-wmf.21/includes/actions/ActionEntryPoint.php(730): Wikibase\Lexeme\MediaWiki\Actions\ViewLexemeAction->show()
#14 /srv/mediawiki/php-1.44.0-wmf.21/includes/actions/ActionEntryPoint.php(507): MediaWiki\Actions\ActionEntryPoint->performAction(Article, MediaWiki\Title\Title)
#15 /srv/mediawiki/php-1.44.0-wmf.21/includes/actions/ActionEntryPoint.php(145): MediaWiki\Actions\ActionEntryPoint->performRequest()
#16 /srv/mediawiki/php-1.44.0-wmf.21/includes/MediaWikiEntryPoint.php(202): MediaWiki\Actions\ActionEntryPoint->execute()
#17 /srv/mediawiki/php-1.44.0-wmf.21/index.php(58): MediaWiki\MediaWikiEntryPoint->run()
#18 /srv/mediawiki/w/index.php(3): require(string)
#19 {main}
Impact
Notes
Lucas_Werkmeister_WMDE merged a task: T406572: MediaWiki\Exception\MWContentSerializationException: $entityId (L137) and $targetId can not be the same..Oct 7 2025, 12:45 PM
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