Client does not resume the playback after reconnection

[mordax7]

I came to notice that while my server stack was updating, including the raspberry pi where the librepost-java client is running, it disconnected me from my Spotify Desctop Client and it stopped playing music(seemed like it paused the music)... but from the logs it seems like librepost-java client lost connection to the internet and disconnected.
After the conversation with @devgianlu it seems like the reconnection worked correctly but it didn't resume the playback.

Here the logs:
librespot-java2.log
librespot-java.log

[devgianlu]

Can you explain what exactly you did? What I understood (partially from librespot-java2.log):

• Was playing some music
• Internet disconnected (how?)
• Reconnected to librespot-java using SpotifyConnect
• Started playing music again

[mordax7]

Each Sunday my server reg will perform unattended system upgrades.
Here were the steps I did:

• librespot-java was running.
• I connected to it over my main computer with ZEROCONF.
• Started listening to few songs and all of a suddon it disconnected me from my main computer(I was still able to see the librespot-java as spotify connect)
• Tried reconnecting few times until it eventually worked
• Started the song from the beginning
• Till it again it paused and disconnected me from the librespot-java spotify connect.

Like you can see it started happening around 9:45~10:00, meanwhile I got an email from my unattended upgrades at 9:46 which then all made sense and I knew it was probably a problem with internet connection.
Strange is just that the connection to librespot-java spotify connect broke because of it, the behavior that I expected would be that the librespot-java spotify connect, keeps the connection to the client(my case, my main computer) and just has a timeout till the connection to the Spotify servers is back and afterwards continues.

Maybe we are missing some timeout parameters?

[mordax7]

PS: packages that were upgraded today:
openssh-client openssh-server openssh-sftp-server ssh
I dont think these would cause any trouble with the librespot-java client.

[devgianlu]

I've just experienced this myself and managed to get some logs. I need to understand how to cause this behavior to do some debugging.

Whenever I try to cause manually it works flawlessly.

Log for reference

[devgianlu]

@xMordax I've added one single line of logging and hopefully this is the issue. Could you recompile and send a log after reproducing the issue?

[mordax7]

@devgianlu I am back Tuesday, I will try creating network I/O load on my server reg with some integration tests and see what happens...
will report back.

[mordax7]

@devgianlu I tried to throw everything at him, my whole LAN was unusable because my integration tests made too much load, so that the Desktop Spotify Client could not even communicate with librespot-java, there was a huge latency in the Network I/O, but the librespot-java just kept on playing as much as he was able too... I will keep an eye on this problem, maybe it occurs again on Sunday, lets see...

[devgianlu]

@xMordax Did you see this issue again?

[mordax7]

I will close this ticket since I think the problem got solved and I created #56 anyway.