InvalidArgumentException: Data for lt_namespace and lt_title must be non-empty
Closed, ResolvedPublicPRODUCTION ERROR
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Authored By

	brennen
	May 18 2023, 6:47 PM

Description

Error

Around 1200 of these:

service.version: 1.41.0-wmf.9
trace.id: 3abae6d8-32dc-4991-9b2e-9dac2194a950
Find trace.id in Logstash

labels.normalized_message

[{reqId}] {exception_url}   InvalidArgumentException: Data for lt_namespace and lt_title must be non-empty

error.stack_trace

from /srv/mediawiki/php-1.41.0-wmf.9/includes/libs/rdbms/platform/SQLPlatform.php(298)
#0 /srv/mediawiki/php-1.41.0-wmf.9/includes/libs/rdbms/database/Database.php(3474): Wikimedia\Rdbms\Platform\SQLPlatform->makeWhereFrom2d(array, string, string)
#1 /srv/mediawiki/php-1.41.0-wmf.9/includes/libs/rdbms/database/DBConnRef.php(119): Wikimedia\Rdbms\Database->makeWhereFrom2d(array, string, string)
#2 /srv/mediawiki/php-1.41.0-wmf.9/includes/libs/rdbms/database/DBConnRef.php(415): Wikimedia\Rdbms\DBConnRef->__call(string, array)
#3 /srv/mediawiki/php-1.41.0-wmf.9/includes/cache/LinkBatch.php(373): Wikimedia\Rdbms\DBConnRef->makeWhereFrom2d(array, string, string)
#4 /srv/mediawiki/php-1.41.0-wmf.9/includes/api/ApiQueryLinks.php(139): LinkBatch->constructSet(string, Wikimedia\Rdbms\DBConnRef)
#5 /srv/mediawiki/php-1.41.0-wmf.9/includes/api/ApiQueryLinks.php(83): ApiQueryLinks->run()
#6 /srv/mediawiki/php-1.41.0-wmf.9/includes/api/ApiQuery.php(688): ApiQueryLinks->execute()
#7 /srv/mediawiki/php-1.41.0-wmf.9/includes/api/ApiMain.php(1914): ApiQuery->execute()
#8 /srv/mediawiki/php-1.41.0-wmf.9/includes/api/ApiMain.php(890): ApiMain->executeAction()
#9 /srv/mediawiki/php-1.41.0-wmf.9/includes/api/ApiMain.php(861): ApiMain->executeActionWithErrorHandling()
#10 /srv/mediawiki/php-1.41.0-wmf.9/api.php(93): ApiMain->execute()
#11 /srv/mediawiki/php-1.41.0-wmf.9/api.php(48): wfApiMain()
#12 /srv/mediawiki/w/api.php(3): require(string)
#13 {main}

And about 21 of the somewhat similar:

service.version: 1.41.0-wmf.9
trace.id: ea1e3dab-50f3-479f-bdd9-da2163bb78f8
Find trace.id in Logstash

labels.normalized_message

[{reqId}] {exception_url}   InvalidArgumentException: Data for ftr_namespace and ftr_title must be non-empty

error.stack_trace

from /srv/mediawiki/php-1.41.0-wmf.9/includes/libs/rdbms/platform/SQLPlatform.php(298)
#0 /srv/mediawiki/php-1.41.0-wmf.9/includes/libs/rdbms/database/Database.php(3474): Wikimedia\Rdbms\Platform\SQLPlatform->makeWhereFrom2d(array, string, string)
#1 /srv/mediawiki/php-1.41.0-wmf.9/includes/libs/rdbms/database/DBConnRef.php(119): Wikimedia\Rdbms\Database->makeWhereFrom2d(array, string, string)
#2 /srv/mediawiki/php-1.41.0-wmf.9/includes/libs/rdbms/database/DBConnRef.php(415): Wikimedia\Rdbms\DBConnRef->__call(string, array)
#3 /srv/mediawiki/php-1.41.0-wmf.9/includes/cache/LinkBatch.php(373): Wikimedia\Rdbms\DBConnRef->makeWhereFrom2d(array, string, string)
#4 /srv/mediawiki/php-1.41.0-wmf.9/extensions/FlaggedRevs/backend/FRDependencyUpdate.php(173): LinkBatch->constructSet(string, Wikimedia\Rdbms\DBConnRef)
#5 /srv/mediawiki/php-1.41.0-wmf.9/extensions/FlaggedRevs/backend/FRDependencyUpdate.php(156): FRDependencyUpdate->makeWhereFrom2d(array, Wikimedia\Rdbms\DBConnRef)
#6 /srv/mediawiki/php-1.41.0-wmf.9/extensions/FlaggedRevs/backend/FRDependencyUpdate.php(83): FRDependencyUpdate->getDepDeletions(array, array)
#7 /srv/mediawiki/php-1.41.0-wmf.9/extensions/FlaggedRevs/backend/FRExtraCacheUpdateJob.php(68): FRDependencyUpdate->doUpdate(integer)
#8 /srv/mediawiki/php-1.41.0-wmf.9/extensions/FlaggedRevs/backend/FRExtraCacheUpdateJob.php(29): FRExtraCacheUpdateJob->doUpdateLinks()
#9 /srv/mediawiki/php-1.41.0-wmf.9/extensions/EventBus/includes/JobExecutor.php(79): FRExtraCacheUpdateJob->run()
#10 /srv/mediawiki/rpc/RunSingleJob.php(77): MediaWiki\Extension\EventBus\JobExecutor->execute(array)
#11 {main}

Impact

Unclear.

Notes

These started coming in steadily after moving T330215: 1.41.0-wmf.9 deployment blockers to group2 wikis.

Details

Request URL: https://fr.wikipedia.org/w/api.php?action=query&format=*&formatversion=*&palimit=*&pasubprojects=*&prop=*&redirects=*&titles=*&tllimit=*&tlnamespace=*&tltemplates=*&utf8=*

Subject	Repo	Branch	Lines +/-
LinkBatch: Re-apply makeWhereFrom2d/constructSet exception	mediawiki/core	master	+11 -12
cache: Do not throw on empty set in LinkBatch::constructSet	mediawiki/core	wmf/1.41.0-wmf.9	+4 -0
cache: Do not throw on empty set in LinkBatch::constructSet	mediawiki/core	master	+4 -0

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Related Objects
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		Status	Subtype	Assigned	Task
		Resolved	Release	brennen	T330215 1.41.0-wmf.9 deployment blockers
		Resolved	PRODUCTION ERROR	Umherirrender	T336964 InvalidArgumentException: Data for lt_namespace and lt_title must be non-empty

Event Timeline

brennen triaged this task as Unbreak Now! priority.May 18 2023, 6:47 PM

brennen created this task.

Restricted Application added a subscriber: Aklapper. · View Herald TranscriptMay 18 2023, 6:47 PM

brennen set Release Version to 1.41.0-wmf.9.May 18 2023, 6:47 PM

brennen added a parent task: T330215: 1.41.0-wmf.9 deployment blockers.

thcipriani added projects: MediaWiki-extensions-FlaggedRevs, Unstewarded-production-error.May 18 2023, 6:59 PM

Novem_Linguae subscribed.May 18 2023, 7:11 PM

Not the root cause, but this is a new throw introduced in rMW678326e6fb34: rdbms: Throw when makeWhereFrom2d() receives empty data (913682), a follow-up to 892988 for T311866: Migrate Database::select usages to SelectQueryBuilder (in WMF-deployed extensions)

Change 921089 had a related patch set uploaded (by Umherirrender; author: Umherirrender):

[mediawiki/core@master] cache: Do not throw on empty set in LinkBatch::constructSet

https://gerrit.wikimedia.org/r/921089

gerritbot added a project: Patch-For-Review.May 18 2023, 7:32 PM

Umherirrender claimed this task.May 18 2023, 8:28 PM

Change 921089 merged by jenkins-bot:

[mediawiki/core@master] cache: Do not throw on empty set in LinkBatch::constructSet

https://gerrit.wikimedia.org/r/921089

Maintenance_bot removed a project: Patch-For-Review.May 18 2023, 8:30 PM

Change 920744 had a related patch set uploaded (by Brennen Bearnes; author: Umherirrender):

[mediawiki/core@wmf/1.41.0-wmf.9] cache: Do not throw on empty set in LinkBatch::constructSet

https://gerrit.wikimedia.org/r/920744

gerritbot added a project: Patch-For-Review.May 18 2023, 8:34 PM

Change 920744 merged by jenkins-bot:

[mediawiki/core@wmf/1.41.0-wmf.9] cache: Do not throw on empty set in LinkBatch::constructSet

https://gerrit.wikimedia.org/r/920744

ReleaseTaggerBot added a project: MW-1.41-notes (1.41.0-wmf.9; 2023-05-15).May 18 2023, 9:00 PM

Mentioned in SAL (#wikimedia-operations) [2023-05-18T21:03:41Z] <brennen@deploy1002> Started scap: Backport for [[gerrit:920744|cache: Do not throw on empty set in LinkBatch::constructSet (T336964)]]

Mentioned in SAL (#wikimedia-operations) [2023-05-18T21:05:13Z] <brennen@deploy1002> brennen: Backport for [[gerrit:920744|cache: Do not throw on empty set in LinkBatch::constructSet (T336964)]] synced to the testservers: mwdebug2001.codfw.wmnet, mwdebug1001.eqiad.wmnet, mwdebug1002.eqiad.wmnet, mwdebug2002.codfw.wmnet

Maintenance_bot removed a project: Patch-For-Review.May 18 2023, 9:10 PM

Mentioned in SAL (#wikimedia-operations) [2023-05-18T21:13:19Z] <brennen@deploy1002> Finished scap: Backport for [[gerrit:920744|cache: Do not throw on empty set in LinkBatch::constructSet (T336964)]] (duration: 09m 38s)

Umherirrender closed this task as Resolved.May 18 2023, 9:35 PM

Umherirrender edited projects, added MediaWiki-General; removed MediaWiki-extensions-FlaggedRevs.

Still seeing:

[{reqId}] {exception_url}   InvalidArgumentException: Data for ftr_namespace and ftr_title must be non-empty

I'll file that separately.

brennen mentioned this in T336980: InvalidArgumentException: Data for ftr_namespace and ftr_title must be non-empty.May 18 2023, 9:44 PM

In T336964#8862910, @gerritbot wrote:

Change 921089 merged by jenkins-bot:

[mediawiki/core@master] cache: Do not throw on empty set in LinkBatch::constructSet

https://gerrit.wikimedia.org/r/921089

This effectively reverts change 913682 since 99% of callers to makeWhereFrom2d come in via LinkBatch::constructSet, and brings back the underlying unsafe query problem.

I suspect this caller that this task was filed for is either new or I missed it when reviewing this Codesearch query. For example, there are many calls that effectively do $query->where( $linkBatch->constructSet() ), which can act in surprising ways when the value is boolean false. It is the callers responsibility to make sure to not go down the surrounding code path in the first place when the LinkBatch is empty and thus decide on some other way to handle that entirely.

I won't re-open this task though, but I'll make a follow-up tagged with this one for visibility that tries to fix the root problem of the two known violations we found (this and T336980) and then re-apply the exception for this error condition.

Some callers are already right and the exception would be wrong in that case:

ApiQueryLinks.php

			$cond = $lb->constructSet( $this->prefix, $this->getDB() );
			if ( $cond ) {
				$this->addWhere( $cond );

So this needs some more work to get the exception thrown by the database layer for invalid input in the LinkBatch class. Checking for empty in LinkBatch was the fast option, many functions in LinkBatch have a isEmpty check.