Ubuntu
mediascanner2 package

Mediascanner crashes and loops on bad media (webm)

Bug #1508142 reported by Alan Pope 🍺🐧🐱 🦄 on 2015-10-20

This bug affects 4 people

Affects		Status	Importance	Assigned to	Milestone
	Canonical System Image	Fix Released	High	Alejandro J. Cura	Canonical System Image ww46-2015 "ota8"
	mediascanner2 (Ubuntu)	Fix Released	High	James Henstridge

Bug Description

Updated my retail bq E4.5 phone to OTA-7.

Opened Music app and saw no music. Tailed mediascanner log, found it repeatedly scanning my music over and over. This causes high cpu, high IO, increased disk usage through logging and locks the database so Music app is unusable.

The only way I could make Music appear was to issue:-

stop mediascanner-2.0

Then re-open Music.
Attached mediascanner log (all 369M of it)

Related branches

lp:~jamesh/mediascanner2/external-metadata-extractor

Merged into lp:mediascanner2 at revision 313

Jamie Strandboge (community): Approve on 2015-11-09

Michi Henning (community): Approve on 2015-11-09

PS Jenkins bot (community): Approve (continuous-integration) on 2015-11-08

Jussi Pakkanen (community): Needs Fixing on 2014-12-12

Revision history for this message

Alan Pope 🍺🐧🐱 🦄 (popey) wrote on 2015-10-20:

mediascanner-2.0.log.gz Edit (42.8 MiB, application/octet-stream)

Alejandro J. Cura (alecu) on 2015-10-20

Changed in mediascanner2 (Ubuntu):
importance:	Undecided → Critical
assignee:	nobody → James Henstridge (jamesh)
Changed in canonical-devices-system-image:
assignee:	nobody → Alejandro J. Cura (alecu)
importance:	Undecided → Critical

Revision history for this message

Alan Pope 🍺🐧🐱 🦄 (popey) wrote on 2015-10-20:

Deleted two of the webm videos from my sd card and now it appears to have stopped looping.

Uploaded to here for "analysis":-

http://people.canonical.com/~alan/big_buck_bunny_1080p_VP8_VORBIS_25fps_7800K_short.WebM
http://people.canonical.com/~alan/goat-rage.webm

Alan Pope 🍺🐧🐱 🦄 (popey) on 2015-10-20

summary:

- Mediascanner runs constantly, rescanning repeatedly
+ Mediascanner crashes and loops on bad media (webm)

Revision history for this message

Alejandro J. Cura (alecu) wrote on 2015-10-20:

I can reproduce this bug by putting this file in my Videos folder: http://video.webmfiles.org/elephants-dream.webm

bq krillin, rc-proposed, r153.

Revision history for this message

Alejandro J. Cura (alecu) wrote on 2015-10-20:

Since this seems to be happening only with webm videos, I'm lowering the priority of the bug.

Changed in canonical-devices-system-image:
importance:	Critical → High
Changed in mediascanner2 (Ubuntu):
importance:	Critical → High
Changed in canonical-devices-system-image:
milestone:	none → ww46-2015

Revision history for this message

James Henstridge (jamesh) wrote on 2015-10-22:

The best solution for this is probably to finish off the external-metadata-extractor branch, which was set aside earlier this year.

I've updated the branch to get it building with trunk, but there is still a bit of work to do (there may be conflicts with the branches from the pending silo, and maybe some tweaks to the AppArmor profiles). The in-progress code can be found here though:

https://code.launchpad.net/~jamesh/mediascanner2/external-metadata-extractor/+merge/244416

Pat McGowan (pat-mcgowan) on 2015-10-22

Changed in canonical-devices-system-image:
status:	New → Confirmed

Marcus Tomlinson (marcustomlinson) on 2015-11-03

Changed in mediascanner2 (Ubuntu):
status:	New → In Progress

Revision history for this message

James Henstridge (jamesh) wrote on 2015-11-03:

I have some in-progress packages in landing silo 55 at the moment. Using Alan's test files, the main scanner daemon no longer crashes (so the startup directory scan isn't repeated), but it looks like there are still a few corner cases to fix up.

Alejandro J. Cura (alecu) on 2015-11-03

Changed in canonical-devices-system-image:
status:	Confirmed → In Progress

Jean-Baptiste Lallement (jibel) on 2015-11-10

Changed in canonical-devices-system-image:
status:	In Progress → Fix Committed

Revision history for this message

Launchpad Janitor (janitor) wrote on 2015-11-10:

This bug was fixed in the package mediascanner2 - 0.108+16.04.20151109-0ubuntu1

---------------
mediascanner2 (0.108+16.04.20151109-0ubuntu1) xenial; urgency=medium

* Move the metadata extractor to a separate process to isolate bugs in
media codecs. (LP: #1508142)

-- James Henstridge <email address hidden> Mon, 09 Nov 2015 01:56:39 +0000

Changed in mediascanner2 (Ubuntu):
status:	In Progress → Fix Released

Revision history for this message

Josué (j2g2rp) wrote on 2015-11-13:

is the fix released now? or it will be released with the next OTA?
I'm answering because I'm having the same problem.
In the bug https://bugs.launchpad.net/music-app/+bug/1514517 Andrew told me that i was having this problem
I checked but it looks like that I haven't any webm files, but the mediascan file is looped.