DivisionByZeroError: Division by zero
Closed, ResolvedPublicPRODUCTION ERROR
Actions

Assigned To

Authored By

	Reedy
	Jan 31 2025, 12:16 PM

Description

Error

mwversion: 1.44.0-wmf.14
reqId: 3fe9840d-9e36-4a0a-bce6-22c901df3e23
Find reqId in Logstash

normalized_message

[{reqId}] {exception_url}   DivisionByZeroError: Division by zero

Frame	Location	Call
from	/srv/mediawiki/php-1.44.0-wmf.14/extensions/TimedMediaHandler/includes/WebVideoTranscode/WebVideoTranscodeJob.php(409)
#0	/srv/mediawiki/php-1.44.0-wmf.14/extensions/EventBus/includes/JobExecutor.php(80)	MediaWiki\TimedMediaHandler\WebVideoTranscode\WebVideoTranscodeJob->run()
#1	/srv/mediawiki/php-1.44.0-wmf.14/extensions/EventBus/maintenance/runSingleJobStdin.php(65)	MediaWiki\Extension\EventBus\JobExecutor->execute(array)
#2	/srv/mediawiki/php-1.44.0-wmf.14/maintenance/includes/MaintenanceRunner.php(695)	MediaWiki\Extensions\EventBus\Maintenance\RunSingleJobStdin->execute()
#3	/srv/mediawiki/php-1.44.0-wmf.14/maintenance/run.php(51)	MediaWiki\Maintenance\MaintenanceRunner->run()
#4	/srv/mediawiki/multiversion/MWScript.php(156)	require_once(string)
#5	{main}

Impact

Notes

Details

Related Changes in Gerrit:

	Subject	Repo	Branch	Lines +/-
	Fix DivisionByZeroError when calculating bitrate	mediawiki/extensions/TimedMediaHandler	master	+283 -271

Customize query in gerrit

Related Objects

Mentioned In: T415646: Improve transaction handling in VideoTranscode job
Mentioned Here: T414348: Some ogg vorbis files fail transcode silently and have duration of 0
T376137: FLAC and MID files display a duration of 0 (zero seconds)
rETMH3a328183593e: Record transcode errors on early bugouts or exception

Event Timeline

Reedy created this task.Jan 31 2025, 12:16 PM

Restricted Application added a subscriber: Aklapper. · View Herald TranscriptJan 31 2025, 12:16 PM

					$bitrate = round(
						(int)( filesize( $this->getTargetEncodePath() ) / $file->getLength() ) * 8
					);

$file->getLength() is seemingly zero. File is a midi file - https://commons.wikimedia.org/wiki/File:A111A.mid, and almost certainly some copyright violation or something...

A111A.mid (MIDI audio file, length 0.0 s, 0 bps overall, file size: 10 KB)

I have a copy, but I'm going to flag it for deletion as it seems suspect.

But locally is fine to play. VLC reckons 2 mins 40 long.

General
Complete name                            : A111A.mid
Format                                   : MIDI
Format/Info                              : RIFF Musical Instrument Digital Interface
File size                                : 9.55 KiB

Audio
Format                                   : MIDI
Format/Info                              : RIFF Musical Instrument Digital Interface

Code last touched in rETMH3a328183593e: Record transcode errors on early bugouts or exception.

Reedy triaged this task as Low priority.Jan 31 2025, 1:49 PM

Reedy updated the task description. (Show Details)Feb 27 2025, 9:37 PM

Reedy moved this task from Untriaged to Jan-Mar 2025 on the Wikimedia-production-error board.Mar 2 2025, 10:22 PM

(Copying team over from duplicate)

Pppery unsubscribed.Dec 2 2025, 4:31 AM

HSwan-WMF moved this task from Incoming/Inbox to Backlog on the Reader Growth Team board.Dec 3 2025, 4:47 PM

Still happening, currently at the top of logspam-watch.

(Might all be from the same file, not sure; the file name doesn’t seem to be included in the logstash message. I guess you could kafkacat for the job params based on the request ID.)

@Lucas_Werkmeister_WMDE i did re-enqueue a bunch of failed transcodes last night, so that might be related. See also T414348 where i noticed another problem.

Change #1225597 had a related patch set uploaded (by TheDJ; author: TheDJ):

[mediawiki/extensions/TimedMediaHandler@master] Fix DivisionByZeroError when calculating bitrate

https://gerrit.wikimedia.org/r/1225597

gerritbot added a project: Patch-For-Review.Jan 12 2026, 3:52 PM

Change #1225597 merged by jenkins-bot:

[mediawiki/extensions/TimedMediaHandler@master] Fix DivisionByZeroError when calculating bitrate

https://gerrit.wikimedia.org/r/1225597

Maintenance_bot removed a project: Patch-For-Review.Jan 14 2026, 3:45 PM

Jdforrester-WMF mentioned this in T415646: Improve transaction handling in VideoTranscode job.Jan 27 2026, 2:37 PM

Partially reverted in https://gerrit.wikimedia.org/r/c/mediawiki/extensions/TimedMediaHandler/+/1229723 but this should still be fixed. We hope.

The last DivisionByZero of this code path was on Jan 23, 2026 @ 21:30:51.475 UTC

Jdlrobson-WMF removed a project: Reader Growth Team.Tue, Apr 7, 11:48 PM

	F71509257: image.png
	Jan 12 2026, 2:29 PM

DivisionByZeroError: Division by zeroClosed, ResolvedPublicPRODUCTION ERRORActions