Mopidy: Sorting in ncmpcpp working very slow and unstable (may be only with Spotify backend)

[actionless]

steps to reproduce:
0) open ncmpcpp
1) add few hundreds songs from spotify to main playlist
2) sort main playlist (Ctrl+S)

Mopidy responds slower and after some time throws the exception:

ERROR    Unhandled exception in MpdFrontend (urn:uuid:9b5696c9-0261-4eea-8132-f43b1017f286):
Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/pykka/actor.py", line 200, in _actor_loop
    response = self._handle_receive(message)
  File "/usr/lib/python2.7/site-packages/pykka/actor.py", line 294, in _handle_receive
    return callee(*message['args'], **message['kwargs'])
  File "/usr/lib/python2.7/site-packages/mopidy/mpd/actor.py", line 84, in on_event
    self.send_idle(_CORE_EVENTS_TO_IDLE_SUBSYSTEMS[event])
  File "/usr/lib/python2.7/site-packages/mopidy/mpd/actor.py", line 88, in send_idle
    listener.send(session.MpdSession, subsystem)
  File "/usr/lib/python2.7/site-packages/mopidy/listener.py", line 27, in send
    'kwargs': kwargs,
  File "/usr/lib/python2.7/site-packages/pykka/actor.py", line 437, in tell
    raise _ActorDeadError('%s not found' % self)
ActorDeadError: MpdSession (urn:uuid:4c427b21-ab0b-426d-b795-efb9afb46db0) not found

UPD: forgot to mention what i am using release 2.0.0

[kingosticks]

What is mb?

[actionless]

may be

[adamcik]

ActorDeadError is just telling us that something killed that thread previously. Do you happen to have any errors or the like earlier in the logs?

[trygveaa]

@adamcik: I can easily reproduce this. It doesn't say anything earlier in the log.

[adamcik]

I can't seem to easily reproduce this.

[actionless]

since DBus in spotify is fixed already i am not more using mopidy so feel free to close this

[jodal]

Closing as there's nothing to go on here and the original poster has moved on.

[trygveaa]

I can still reproduce this consistently, however only on one of my machines. It also happens randomly from time to time on that machine.

Do you have any suggestions on how to debug this?

[makkanx]

Any news on this issue? I keep getting it many times every day.

[kingosticks]

If you can easily and reliably reproduce it then a debug log showing the exact chain of events that causes this. And your mopidy deps output. And can you determine if it is only when the playlist contains Spotify tracks, that was never made clear in the original report.

[actionless]

And can you determine if it is only when the playlist contains Spotify tracks, that was never made clear in the original report.

yeah, it was only with Spotify, never with local tracks

[makkanx]

I'm running with save-debug-log right now. My current playlist has both local and spotify tracks and a total of 1568 tracks.

[makkanx]

Here is a link to debug log, deps and config.
(https://gist.github.com/makkanx/244277b5c4cd67d8a587a99399a6be07)
Let me know if you need more of the logfile.
I will try with a large playlist without any spotify tracks.

[makkanx]

I got the same error without spotify tracks.
(https://gist.github.com/makkanx/28c5ac01eac3e62039c8f2792e8f267e)
I have the complete logfile incase needed.
This playlist has 1465 tracks.

[kingosticks]

The OP was confident this was only with Spotify tracks so is this actually the same issue?

Is your issue still something to do with sorting? I don't see any reordering MPD commands in those logs. There's not much of anything going on. Did nothing happen before the snippet you provided? It might be better to provide the entire log. And to disable all extensions except local.

[makkanx]

Mine happens even if I don't sort.

[kingosticks]

OK so doesn't sound like same issue as the OP. And not necessarily the same as #1750. Can you provide steps for us to reproduce and a full debug log in a new issue. Reusing this one will just be confusing.

[makkanx]

It is difficult to reproduce but it happens quite often if I have Spotify songs. Right now I'm running with only m3u, files and mpd enabled to see if it happens then.