Moving of translation page fails with OOM exception (database job queue backend)
Closed, ResolvedPublicBUG REPORT
Actions

Assigned To

Authored By

	abi_
	Aug 19 2020, 3:56 PM

Description

Steps to Reproduce:

Try to move https://translatewiki.net/wiki/User:Abijeet_Patro/test-no-wrap to a new location - https://translatewiki.net/wiki/User:Abijeet_Patro/test-no-wrap-2

Actual Results:

No entry in the page translation logs
Logs have OOM exceptions

Expected Results:
Page should be moved appropriately.

Exception

[19-Aug-2020 15:44:54 UTC] PHP Fatal error:  Allowed memory size of 2147483648 bytes exhausted (tried to allocate 262144 bytes) in /srv/mediawiki/tags/2020-08-19_15:12:16/includes/libs/rdbms/database/Database.php on line 1254
[19-Aug-2020 15:44:54 UTC] PHP Fatal error:  Allowed memory size of 2147483648 bytes exhausted (tried to allocate 262144 bytes) in Unknown on line 0

# Appears after a few minutes of marking the page for translation, I *think* it is related
[19-Aug-2020 15:47:52 UTC] PHP Fatal error:  Allowed memory size of 2147483648 bytes exhausted (tried to allocate 262144 bytes) in /srv/mediawiki/tags/2020-08-19_15:12:16/vendor/wikimedia/at-ease/src/Wikimedia/AtEase/AtEase.php on line 36
[19-Aug-2020 15:47:52 UTC] PHP Fatal error:  Allowed memory size of 2147483648 bytes exhausted (tried to allocate 262144 bytes) in Unknown on line 0

Some possibly related logs, noticed during a prior test run:

[2020-08-19 15:07:45] exception.ERROR: [df8617ccdb6177825252aeab] /srv/mediawiki/targets/production/maintenance/runJobs.php   PHP Fatal Error from line 125 of /srv/mediawiki/tags/2020-08-12_14:28:07/includes/jobqueue/JobSpecification.php: Allowed memory size of 2147483648 bytes exhausted (tried to allocate 20480 bytes) {"exception":"[object] (ErrorException(code: 0): PHP Fatal Error: Allowed memory size of 2147483648 bytes exhausted (tried to allocate 20480 bytes) at /srv/mediawiki/tags/2020-08-12_14:28:07/includes/jobqueue/JobSpecification.php:125)

Status

Fixed by T268840: Infinite loop in DeferredUpdates::tryOpportunisticExecute and fix confirmed by Language team

Outcome

It is now possible again to move translatable pages on translatewiki.net and in other wikis outside Wikimedia production that use similar setup.

Related Objects
Search...

		Status	Subtype	Assigned	Task
		Resolved	BUG REPORT	Nikerabbit	T260812 Moving of translation page fails with OOM exception (database job queue backend)
		Resolved		Nikerabbit	T268840 Infinite loop in DeferredUpdates::tryOpportunisticExecute

Event Timeline

abi_ created this task.Aug 19 2020, 3:56 PM

Restricted Application added a subscriber: Aklapper. · View Herald TranscriptAug 19 2020, 3:56 PM

abi_ renamed this task from Moving of trranslation page fails on translatewiki.net with OOM to Moving of trranslation page fails on translatewiki.net with OOM exception.Aug 19 2020, 3:56 PM

Pppery renamed this task from Moving of trranslation page fails on translatewiki.net with OOM exception to Moving of translation page fails on translatewiki.net with OOM exception.Aug 19 2020, 4:40 PM

Arrbee added a project: Language-Team (Language-2020-October-December).Nov 3 2020, 8:22 AM

Planning to do some live-debugging on canary to identify the cause.

Nikerabbit mentioned this in T268840: Infinite loop in DeferredUpdates::tryOpportunisticExecute.Nov 26 2020, 4:07 PM

Nikerabbit moved this task from In Progress to Blocked on the Language-Team (Language-2020-October-December) board.Dec 1 2020, 8:04 AM

Nikerabbit moved this task from Backlog to maintenance and operational issues on the MediaWiki-extensions-Translate board.Dec 10 2020, 11:52 AM

Nikerabbit triaged this task as High priority.Dec 10 2020, 12:19 PM

Nikerabbit added a subtask: T268840: Infinite loop in DeferredUpdates::tryOpportunisticExecute.

Nikerabbit edited projects, added affects-translatewiki.net; removed translatewiki.net.

Nikerabbit updated the task description. (Show Details)Dec 14 2020, 3:51 PM

Pginer-WMF edited projects, added Language-Team (Language-2021-January-March); removed Language-Team (Language-2020-October-December).Jan 4 2021, 10:10 AM

Pginer-WMF moved this task from Quarter Backlog to Blocked on the Language-Team (Language-2021-January-March) board.

Nikerabbit renamed this task from Moving of translation page fails on translatewiki.net with OOM exception to Moving of translation page fails with OOM exception (database job queue backend).Jan 11 2021, 8:48 AM

Nikerabbit mentioned this in T20585: Moving many (>100) subpages requires loads of memory; leads to PHP Fatal error.

Nikerabbit moved this task from Blocked to Recheck after deployment on the Language-Team (Language-2021-January-March) board.Jan 18 2021, 7:51 AM

Nikerabbit updated the task description. (Show Details)