0011313: AV when MM is running in background - MantisBT

ID	Project	Category	View Status	Date Submitted	Last Update

0011313	MMW v4	Other	public	2013-09-25 17:41	2014-02-13 21:49

Reporter	rusty	Assigned To
Priority	urgent	Severity	crash	Reproducibility	always
Status	assigned	Resolution	open
Product Version	4.1
Target Version	4.1.1

Summary	0011313: AV when MM is running in background
Description	MediaMonkey had been playing music in the background, and it just generated an AV. When I look at the screen, I see that a tagging operation appears to be stuck. At this point MediaMonkey must be force-terminated. An elog with this bug ID was submitted at 1:40pm
Tags	No tags attached.
Attached Files	BugReport__20130925133634.zip (153,910 bytes) MediaMonkey.elf (107,414 bytes)

Fixed in build

Ludek 2013-11-28 20:00 developer ~0038413 Last edited: 2013-11-28 20:03	Based on the log it was not AV, but freeze. It frozen when stopping (TWAInputPlugin.Stop), I've gone through the related code there and the code seems to be very sensitive and any change there would rather cause more bad than good. I remember that you observed this kind of issue 1 or 2 years ago in 4.0 and Jiri indicated that he doesn't want to touch the code before MM 4.0 release. Now, we are in similar situation (before MM 4.1 release). The code needs refactor, changed target to MM5.

Ludek 2013-12-12 22:20 developer ~0038748 Last edited: 2013-12-12 22:20	BTW: This is same log as in 0008684

Ludek 2014-02-10 07:24 developer ~0039543 Last edited: 2014-02-11 14:26	Another report with the same callstack: http://www.mediamonkey.com/forum/viewtopic.php?f=7&t=75373 This time user indicated that artwork/lyrics lookup could have an influence on this, maybe tagging operations could have an impact on this? EDIT: user indicated that it is not the tagging, but background scan that triggers the freeze when playing, details via the forum link EDIT2: The same freeze (same callstack) was reproduced by LL here: 0011853, ELF uploaded

Ludek 2014-02-13 21:48 developer ~0039599 Last edited: 2014-02-13 22:41	Attached the new log from this user: http://www.mediamonkey.com/forum/viewtopic.php?f=7&t=75373 It freezes when playing file stops during "restore from tagging", changed target to 4.1.1 as it looks that the user can regularly reproduce it when lyrics/artork lookup is involved (and thus tagging). EDIT: from the log it freezes when restoring currently playing track from tagging, but it looks that the track itself could not be tagged (was locked by a process) and the WM layer has frozen on that file from the same reason, asking more info via the forum link.