Jellyfin preventing another application from starting properly

[Kreeblah]

Describe the bug
I recently started looking into Jellyfin in order to see whether it might be able to replace Plex in my setup. However, what I found is that if Jellyfin is running on my system, it's preventing Roon from starting up properly. I created a thread on the Roon support forum at https://community.roonlabs.com/t/clients-suddenly-unable-to-connect-to-server/87870, as the behavior I was seeing in their application started a couple weeks after installing Jellyfin, but I guess I hadn't tried restarting Roon (which seems to be what triggers it).

I don't know whether this is something your team wants to look into, but I wanted to report it here as well, just in case.

To Reproduce

1. Install Roon (creating a trial account if needed) on Ubuntu 18.04
2. Set Roon up to use a non-root user
3. Set Jellyfin up to use the same non-root user
4. Start Jellyfin and wait for it to finish loading
5. Start Roon and watch /var/roon/RoonServer/Logs/RoonServer_log.txt

Expected behavior
Both applications should be able to run together. However, Roon keeps restarting. Jellyfin, on the other hand, seems to run fine.

System (please complete the following information):

• OS: Ubuntu 18.04
• Browser: N/A
• Jellyfin Version: 10.4.3
• Installed Plugins: Anime
• Reverse proxy: nginx

[Kreeblah]

Oh, I should probably mention that I did not observe this behavior with Emby last I tried it, but it's been a while. If it's useful, I can see whether the current Emby version does the same thing.

[Artiume]

So Roon uses ffmpeg, and perhaps upnp. Those are the only two things I can think of that might cause some sort of interference.

As an immediate solution, you could install jellyfin in docker to provide isolation.

[anthonylavado]

@Kreeblah If you tried Emby any time before approx. May 2018, then we should be clear.

I’ll see if I can spin this up later. Does Roon give any reason why it restarts? Is it a file in use issue or something?

[anthonylavado]

@Kreeblah I'd really love to try this to help you out, but I don't want to give Roon my credit card just to run a two week trial.

Edit: sigh they seem to have no control over it. I'll guess I'll try it. If you have any other info like I asked about, please let me know.

[anthonylavado]

I should have waited before installing (I've deleted my account anyway).

There's this on their forums regarding Emby. I'm wondering if it's the same issue in Jellyfin: https://community.roonlabs.com/t/new-roonserver-install-with-restored-backup-in-repeated-crash-loop-if-you-try-to-login-from-a-client/81928/11

[Kreeblah]

Hey, sorry for letting this go so long. The holidays were pretty hectic, and I'm backed up on a lot of things.

You actually don't need an account to test this issue at all. I wasn't even getting to the point in Roon where I could enter credentials at all. I'll give that a go with what you found regarding port 1900, though, and see whether I see the same behavior.

[stale]

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[Kreeblah]

I finally got around to trying this, so I wanted to post my results in case anybody else has the same issue.

Disabling all of the DLNA settings in Jellyfin does seem to resolve this for me. I can have it installed and run with Roon, regardless of which one starts first. I imagine I could have gotten by with just disabling the DLNA server piece, but I don't use DLNA for anything anyway, so I figured I might as well just turn it all off.

Thanks for finding that!