Exaile hangs on track change randomly

[Grzegorz Lachowski]

Before I killed it from another terminal, I couldn't do anything - X were frozen..
I use the latest bzr version.
log doesn't say anything special:

[gregorl@chii ~]$ exaile
INFO : Loading Exaile 0.3.1.99...
INFO : Loading settings...
INFO : Loading plugins...
INFO : Attempting to connect to AudioScrobbler (http://post.audioscrobbler.com/)
INFO : Loading collection...
INFO : Logged in successfully to AudioScrobbler (http://post.audioscrobbler.com/)
INFO : Connected to AudioScrobbler
INFO : Loading devices...
INFO : Loading interface...
INFO : Loading main window...
INFO : Connecting main window events...
INFO : Loading panels...
INFO : Connecting panel events...
INFO : Done loading main window...
INFO : Playing file:///home/gregorl/Muzyka/The%20Parasails%20-%20Skylife/The%20Parasails%20-%2002.%20Skylife%202.mp3
INFO : AudioScrobbler OK: i%5B0%5D=1275815328&b%5B0%5D=Skylife&o%5B0%5D=P&n%5B0%5D=2&a%5B0%5D=The+Parasails&s=06b8c571d720413297032891f1e3a666&m%5B0%5D=&t%5B0%5D=Skylife+2&r%5B0%5D=&l%5B0%5D=361
INFO : Playing file:///home/gregorl/Muzyka/absent_friend%20-%20No%20planets,%20No%20meteorites/absent%20friend%20-%2001%20-%20A%20Dying%20Sun.mp3
INFO : Attempting to submit "Now Playing" information to AudioScrobbler...
INFO : Playing file:///home/gregorl/Muzyka/absent_friend%20-%20No%20planets,%20No%20meteorites/absent%20friend%20-%2002%20-%20Cassiopeia.mp3
INFO : Submitted "Now Playing" successfully to AudioScrobbler
INFO : Attempting to submit "Now Playing" information to AudioScrobbler...
INFO : Submitted "Now Playing" successfully to AudioScrobbler
Unicestwiony
[gregorl@chii ~]$

[Grzegorz Lachowski (gregory-lachowski)]

I forgot to say, music was still playing after freeze.

[Grzegorz Lachowski (gregory-lachowski)]

it appears that was fixed recently.. In 3386-1 it works ok and the track changing and stopping seems to be faster

[Mathias Brodala (mathbr)]

This is most likely related to the revert to asynchronous events.

[Grzegorz Lachowski (gregory-lachowski)]

It happens again randomly.

[Grzegorz Lachowski (gregory-lachowski)]

It occurs even when main window is hidden, it seems that's not connected with visibility.

[Mathias Brodala (mathbr)]

Can you re-run with --debug and possibly --eventdebug? And what playback engine are you using?

[Grzegorz Lachowski (gregory-lachowski)]

I am using normal playback engine. I have some problems with --eventdebug - it does not produce more information than the run without flags. I will collect the logs and post it, when the freeze problem appears again.

[Grzegorz Lachowski (gregory-lachowski)]

I don't know if this is connected with it, but exaile just crashed on a track change with following output:

[gregorl@chii ~]$ exaile --eventdebug
INFO : Loading Exaile 0.3.3.0-dev...
INFO : Loading settings...
INFO : Loading plugins...
INFO : Attempting to connect to AudioScrobbler (http://post.audioscrobbler.com/)
INFO : Loading collection...
INFO : Logged in successfully to AudioScrobbler (http://post.audioscrobbler.com/)
INFO : Connected to AudioScrobbler
INFO : Loading devices...
INFO : Loading interface...
INFO : Loading main window...
INFO : Enabling Restart menu item
INFO : Connecting main window events...
INFO : Loading panels...
INFO : Connecting panel events...
INFO : Done loading main window...
INFO : Playing file:///home/gregorl/Muzyka/Alva%20Noto%20-%20Xerrox%20Vol1%20%5B2007%5D/Alva%20Noto%20-%2006.%20Haliod%20Xerrox%20Copy%202%20Airfrance.mp3
/usr/lib/exaile/xlgui/__init__.py:72: PangoWarning: pango_layout_get_width: assertion `layout != NULL' failed
  gtk.main()
/usr/lib/exaile/xlgui/__init__.py:72: PangoWarning: pango_layout_get_line_count: assertion `layout != NULL' failed
  gtk.main()
/usr/lib/exaile/xlgui/__init__.py:72: GtkWarning: gdk_draw_layout: assertion `PANGO_IS_LAYOUT (layout)' failed
  gtk.main()
INFO : Attempting to submit "Now Playing" information to AudioScrobbler...
INFO : Submitted "Now Playing" successfully to AudioScrobbler
INFO : Playing file:///home/gregorl/Muzyka/Alva%20Noto%20-%20Xerrox%20Vol1%20%5B2007%5D/Alva%20Noto%20-%2007.%20Haliod_Xerrox_Copy_6.mp3
INFO : Attempting to submit "Now Playing" information to AudioScrobbler...
INFO : Submitted "Now Playing" successfully to AudioScrobbler
INFO : Playing file:///home/gregorl/Muzyka/Alva%20Noto%20-%20Xerrox%20Vol1%20%5B2007%5D/Alva%20Noto%20-%2008.%2010-06_Astoria.mp3
INFO : Attempting to submit "Now Playing" information to AudioScrobbler...
INFO : Submitted "Now Playing" successfully to AudioScrobbler
INFO : Playing file:///home/gregorl/Muzyka/Akufen%20-%20My%20Way%20%5B2002%5D/Akufen%20-%2001.%20Even%20White%20Horizons.mp3
INFO : Playing file:///home/gregorl/Muzyka/Akufen%20-%20My%20Way%20%5B2002%5D/Akufen%20-%2002.%20Installation.mp3
INFO : Playing file:///home/gregorl/Muzyka/Akufen%20-%20My%20Way%20%5B2002%5D/Akufen%20-%2003.%20Skidoos.mp3
INFO : Playing file:///home/gregorl/Muzyka/Akufen%20-%20My%20Way%20%5B2002%5D/Akufen%20-%2004.%20Deck%20The%20House.mp3
INFO : Playing file:///home/gregorl/Muzyka/Akufen%20-%20My%20Way%20%5B2002%5D/Akufen%20-%2005.%20Wet%20Floors.mp3
INFO : Playing file:///home/gregorl/Muzyka/Akufen%20-%20My%20Way%20%5B2002%5D/Akufen%20-%2006.%20Heaven%20Can%20Wait.mp3
INFO : Playing file:///home/gregorl/Muzyka/Alva%20Noto%20-%20Xerrox%20Vol1%20%5B2007%5D/Alva%20Noto%20-%2007.%20Haliod_Xerrox_Copy_6.mp3
INFO : Playing file:///home/gregorl/Muzyka/Alva%20Noto%20-%20Xerrox%20Vol1%20%5B2007%5D/Alva%20Noto%20-%2006.%20Haliod%20Xerrox%20Copy%202%20Airfrance.mp3
INFO : Attempting to submit "Now Playing" information to AudioScrobbler...
INFO : Submitted "Now Playing" successfully to AudioScrobbler
INFO : Playing file:///home/gregorl/Muz...

[Mathias Brodala (mathbr)]

Yes, --eventdebug ATM does not work without --debug, thus specify both to get the full output. And please also try with the Unified engine.

[Grzegorz Lachowski (gregory-lachowski)]

In attachment there are 3 log files with Exaile hanged on track change - main window was white and unresponsive.
It happens with the normal engine, I coudn't reproduct it using the unified one, but I noticed strange track skipping using unified engine and attached a log when it happened, but I believe it should go somewhere else.

[Grzegorz Lachowski (gregory-lachowski)]

I noticed, that it sent same event twice (track_tags_changed with same songname) and then hanged

[Grzegorz Lachowski (gregory-lachowski)]

In this attachment is a log when Exaile froze my X and I had to kill from another terminal.

[Emiel Molenaar (emiel-molenaar)]

I can confirm this one. Running latest bzr version too on Ubuntu 10.04 x86. For me, this occurs when Exaile has been playing for a while (say like a half an hour or something). I can move the mouse, but the whole screen is frozen and Exaile keeps on playing.

[Anthony Simpson (raynes)]

I can confirm this as well. Using 3.2.0 on Ubuntu 10.04, it happens randomly, and almost every time in a custom playlist. In the "Playlist 1" playlist that opens, it doesn't do it no matter how hard I try to break it. It's only in the other playlists that this seems to happen.

[Anthony Simpson (raynes)]

Actually, I just realized others were having issues where it freezes X. All that happens here is that exaile itself freezes. It continues to play, however.

[Anthony Simpson (raynes)]

I was just toying around a moment ago, and I noticed something. It only freezes when you play a song that has spaces in it's path. Lookie here:

INFO : Playing file:///home/rayne/Music/3OH!3/gtkpod845474.mp3
INFO : Playing file:///home/rayne/Music/3OH!3/Chokechain.mp3
INFO : Playing file:///home/rayne/Music/3OH!3/Don't%20Trust%20Me.mp3
INFO : Playing file:///home/rayne/Music/3OH!3/gtkpod545282.mp3
INFO : Playing file:///home/rayne/Music/3OH!3/gtkpod845474.mp3
INFO : Playing file:///home/rayne/Music/3OH!3/gtkpod693260.mp3
INFO : Playing file:///home/rayne/Music/AC-DC/Black%20Ice/7%20-%20Spoilin'%20for%20a%20Fight.mp3
Killed

It was only when I played that last song did it freeze. I've done this several times with different song combinations, and it works the same every time.

[Anthony Simpson (raynes)]

Actually, never mind. I made a booboo. I jumped to conclusions too quickly, and didn't noticed the spaces in some of my test songs. It actually only seems to freeze on that particular album. Songs from Black Ice. I'm thinking my problem isn't related to this one at all. :\

[Emiel Molenaar (emiel-molenaar)]

Confirmed again, running Exaile rev 3643 from Bazaar, hanging the X server after changing tracks. Sorry, no logs.

[Steve Dodier-Lazaro (sidi)]

Apart from a bzr "bisect" and long hours of testing, I don't see how to find
the origin of this bug. I can start bisecting the last 200 revisions now if
wanted.

[Johannes Sasongko (sjohannes)]

The cause is almost certainly a changeset removing the guarantee that Exaile event callbacks are run in the GDK main thread (search for "sync" in commit logs). Apparently this was required for a new feature to work (can't remember what).

The solution, as far as I know, is as dull as tracking down every event callback and making sure that no GTK+ function is ever called from another thread. I wish GTK+ could help debugging this, but I don't think it can.

[Emiel Molenaar (emiel-molenaar)]

Mathias Brodala has commited some code into bazaar which maybe fixes this bug:

http://bazaar.launchpad.net/~exaile-devel/exaile/exaile-0.3.x/revision/3671
http://bazaar.launchpad.net/~exaile-devel/exaile/exaile-0.3.x/revision/3672

I'm running revision 3673 now, and will report my findings here.

[Grzegorz Lachowski (gregory-lachowski)]

I keep using latest bzr revision and freeze did not occur from time I have updated Exaile. Before it happened at least once a day and now it seems to be fine.

[Emiel Molenaar (emiel-molenaar)]

I've been using Exaile quite frequently since rev 3671 and 3672, and this bug seems to be fixed according to me too.

[reacocard (reacocard)]

tentatively marking as fixed