Jellyfin crashes during playback with no evidence in logs

[hugefinfan]

IMO, it looks like you are losing connection with the server.  Is your server local?  Remote?  Behind a reverse proxy?  CGNAT?

First of all THANK YOU so much for helping me out here; I have both plex and JF set up and I MUCH prefer the purely open source philosophy and want my system to work best.

Yes, in this particular example I am behind a reverse proxy (NGINX -> CloudFlare) but am accessing this connection from the same location as the server is located. Oddly plex doesnt have this issue and the issue happens even if the buffer is full in the Jellyfin admin console (last time it happened in the last few minutes of a 58-minutes episode).

[TheDreadPirate]

Using cloudflare to stream video is against their TOS and could be a contributing factor.

For your local devices, are they using your domain address to connect?

[hugefinfan]

Using cloudflare to stream video is against their TOS and could be a contributing factor.

For your local devices, are they using your domain address to connect?

Correct about cloudflare; I'm not using CloudFlare Tunnels; just their proxy and DNS services. My understanding is that it is the CDN that is against streaming ToS:

https://www.cloudflare.com/service-speci...work-terms

For devices on my network, no, they are connecting to the public-facing domain name and my browser is not pointed directly at the local server.

Here's a thought; I'll try streaming internally and see if the error persists there. In the meantime here is another firefox console of another crash:

Code:

Requesting url without automatic networking: https://sub.domain.tld/Sessions/Playing/Progress 3 node_modules.jellyfin-apiclient.bundle.js:2:14622
Sending web socket message: KeepAlive node_modules.jellyfin-apiclient.bundle.js:2:18698
Received KeepAlive from server. node_modules.jellyfin-apiclient.bundle.js:2:62736
Requesting url without automatic networking: https://sub.domain.tld/Sessions/Playing/Progress 3 node_modules.jellyfin-apiclient.bundle.js:2:14622
Sending web socket message: KeepAlive node_modules.jellyfin-apiclient.bundle.js:2:18698
Received KeepAlive from server. node_modules.jellyfin-apiclient.bundle.js:2:62736
Requesting url without automatic networking: https://sub.domain.tld/Sessions/Playing/Progress 3 node_modules.jellyfin-apiclient.bundle.js:2:14622
Sending web socket message: KeepAlive node_modules.jellyfin-apiclient.bundle.js:2:18698
Received KeepAlive from server. node_modules.jellyfin-apiclient.bundle.js:2:62736
HLS Error: Type: networkError Details: fragLoadError Fatal: false main.jellyfin.bundle.js:2:69163
hls.js response error code: 502 main.jellyfin.bundle.js:2:69369
Requesting url without automatic networking: https://sub.domain.tld/Sessions/Playing/Progress node_modules.jellyfin-apiclient.bundle.js:2:14622
Requesting url without automatic networking: https://sub.domain.tld/Sessions/Playing/Progress node_modules.jellyfin-apiclient.bundle.js:2:14622
Sending web socket message: KeepAlive node_modules.jellyfin-apiclient.bundle.js:2:18698
Received KeepAlive from server.

I think we may be on the right track with investigating proxy or gateway as the 502 error (again above) seems to point to that:

https://en.wikipedia.org/wiki/HTTP_502

but I am unsure why losing connection from the server for a few seconds (or in all likelihood even a few milliseconds) would cause video to crash if there is tens of minutes buffered already. If that were the case I imagine many people would experience this error with great frequency causing this software to be basically unusable.

[hugefinfan]

woah, now this is interesting. When it crashes while playing locally (no dns, no proxy) this is the browser console error:

Code:

Requesting url without automatic networking: http://10.xxx.xxx.xxx:8096/Sessions/Playing/Progress node_modules.jellyfin-apiclient.bundle.js:2:14622
HLS Error: Type: mediaError Details: bufferStalledError Fatal: false main.jellyfin.bundle.js:2:69163
Requesting url without automatic networking: http://10.xxx.xxx.xxx:8096/Sessions/Playing/Progress

ok this feels like we're getting somewhere. I'm currently digging into some forums related specifically to HLS but if I should be looking somewhere else please let me know!

[hugefinfan]

Found this thread from a few years ago:

https://github.com/jellyfin/jellyfin/issues/11450

To my knowledge all my advanced playback -> transcoding settings are all default except for me enabling QSV.

[TheDreadPirate]

Is your host and/or router setup for IPv6? This seems like some weird networking issue. Does your home network have any special configurations? VLANs?

[hugefinfan]

Is your host and/or router setup for IPv6?  This seems like some weird networking issue.  Does your home network have any special configurations?  VLANs?

IPv6 is disabled. My test machine and the server are on the same VLAN.

[TheDreadPirate]

Do you have any browser plugins that could interfere with Jellyfin? Have you tried non-browser clients?

[hugefinfan]

Do you have any browser plugins that could interfere with Jellyfin?  Have you tried non-browser clients?

I have a roku device and sometimes use my android app on my phone. I've never had an issue with either.

Firefox has ublock, decentraleyes, privacy badger and chrome only has ublock.

[hugefinfan]

Upgraded to v10.10.1 and the problem hasn't presented itself yet!