Failed MessageIndexRebuildJob execution (Exception "MessageIndex: unable to acquire lock")
Closed, DuplicatePublicPRODUCTION ERROR
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Assigned To

None

Authored By

	Krinkle
	Jun 5 2019, 10:03 AM

Description

Error

Request ID: XPWeYApAIC8AAD9VoWIAAAAM

message

MessageIndex: unable to acquire lock

trace

#0 /srv/mediawiki/php-1.34.0-wmf.7/extensions/Translate/utils/MessageIndexRebuildJob.php(36): MessageIndex->rebuild()
#1 /srv/mediawiki/php-1.34.0-wmf.7/extensions/EventBus/includes/JobExecutor.php(66): MessageIndexRebuildJob->run()
#2 /srv/mediawiki/rpc/RunSingleJob.php(77): JobExecutor->execute(array)
#3 {main}

Impact

Unknown.

It depends on what this feature is doing exactly, but generally with failing jobs it might be that certain user actions are not propagating due to this error.

If this job is not essential (e.g. an optimisation/precache kind of thing), then the exception should be caught and Job::run() not return false, so that these are not logged as application failures - which are meant to indicate that software is unstable.

Notes

Has been observed in production since at least 1.34-wmf.4.

Screenshot 2019-06-05 at 11.02.09.png (744×2 px, 123 KB)

Event Timeline

Krinkle created this task.Jun 5 2019, 10:03 AM

Restricted Application added a subscriber: Aklapper. · View Herald TranscriptJun 5 2019, 10:03 AM

Krinkle added projects: Language-Team, MediaWiki-extensions-Translate.Jun 5 2019, 10:03 AM

Krinkle moved this task from Untriaged to Older on the Wikimedia-production-error board.

mmodell changed the subtype of this task from "Task" to "Production Error".Aug 28 2019, 11:06 PM

Just observed a spike of 361 of these in 1.35.0-wmf.23.

brennen moved this task from Backlog to Logs/Train on the User-brennen board.Mar 12 2020, 10:25 PM

Nikerabbit closed this task as a duplicate of T221119: "This namespace is reserved for content page translations" when trying to translate a recently created translation unit.Jun 22 2020, 1:16 PM

	F29347239: Screenshot 2019-06-05 at 11.02.09.png
	Jun 5 2019, 10:03 AM

Failed MessageIndexRebuildJob execution (Exception "MessageIndex: unable to acquire lock")Closed, DuplicatePublicPRODUCTION ERRORActions