Plex on Synology needs restarting almost daily to access my libraries

Hi
Plex used to work fine but recently having trouble finding my library every 1-2 days (yellow triangle! next to it). After a restart its fine for a while, but after about a day eventually stops and needs restart.
Installed Emby is on same server and works fine. So, seems to be a Plex issue?

Have seen several similar posts on-line, but never seem to point to a discernable problem or fix.

I have posted the logs from both the server and Plex in case anyone can see anything. Plex Version 1.26.0.5715
Plex Synology Logs.zip (2.0 MB)

Any and all suggestions welcome. Thanks.

Where are you running Plex Media Server?

The log files are from Plex Media Server on Windows.

Apr 18, 2022 09:57:21.822 [7460] INFO - Plex Media Server v1.25.4.5487-648a8f9f9 - Microsoft PC x64 - build: windows-x86 windows - GMT -07:00
Apr 18, 2022 09:57:21.822 [7460] INFO - Windows version: 10.0 (Build 19044), language en-US

It seems problem is with networking or DNS. The server cannot resolve host names.

Apr 18, 2022 10:02:11.090 [10452] WARN - [HttpClient] HTTP error requesting GET http://plex.tv/pms/:/ip (6, Couldn't resolve host name) (Could not resolve host: plex.tv)

May 05, 2022 13:27:33.625 [10828] DEBUG - [EventSourceClient/mediaserver] Resolving  port 443
May 05, 2022 13:27:33.625 [10828] DEBUG - [EventSourceClient/mediaserver] Failure in SNI configuration (0 - The operation completed successfully).
May 05, 2022 13:27:33.625 [10828] ERROR - [EventSourceClient/mediaserver] Retrying in 600 seconds.

Thanks so much!

I am running Plex on Synology (where my libraries are), but the logs come from Plex and Synology on my PC browser. If there is something else I need, please let me know.

Anyway to resolve this? Why does the Network/NDS have a problem with Plex and not with Emby? Also, just FYI, when it has trouble finding my library it is the same across mobile, PC, and TV(hardwired).

The log files are from Plex Media Server running on a Windows 10 system, not on a Synology NAS.

Might you have two installations of Plex Media Server, one on the Synology and one on your PC?

Look in Settings → Authorized Devices. How many servers are listed?

To retrieve the correct logs, make sure you have the correct server selected on the left hand side in Settings.

You can also manually retrieve the log files from the Synology NAS.

See FAQ #13 in Synology FAQ - Questions, Answers, and a few How-To’s

Thanks again,
Instructions were perfect. These should be the Synology logs.

Plex Media Server Logs_2022-05-14_18-43-31.zip (7.7 MB)

Hi,
Hoping that someone can help out here. Seen this same problem on the forums before but seems that no one has solved it yet.
Any and all help greatly appreciated.
Thanks

gleiche seit ca 1 Monat bei mir auch - man wartet auf das Update und leider immer wieder unkontrolliertes Anhalten des Severs - der sich nicht wieder alleine Startet sondern manuell gestartet werden muss.

A quick look at your logs indicate some problem querying the network interface on device.

In most recent log lots of network errors and seems to not be able to figure out local IP because of it.

May 14, 2022 14:32:53.887 [0x7137ad48] DEBUG - Detected primary interface: 0.0.0.0

and only once which seems to likely be the correct IP

May 14, 2022 14:33:16.852 [0x7137ad48] DEBUG - Detected primary interface: 192.168.0.117

Can you describe how your network is set up?

Thank you.
POE injector to wifi router WAN input.
Router line 1 to extender
Router Line 2 to Roku
Router Line 3 to AVR
Router Line 4 to DS 416

IT seems this bug was introduced around the 1.26 update in April/May time frame at least for DSM6. I used to run my nas 24/7 for months without any connection issues to plex then it started doing this randomly not finding server issue. I did recently once updating to 1.27 lose my server connection and had to “claim” my server again at about the 1yr mark of setting up the nas sort of like some “lease” ended for the initial setup. Now when I get this loss of connection to plex server I reboot my nas and it finds it ok no issues. I just updated to 1.27.0.5897 today but the release notes don’t say anything about this issue or other connection issues.
Now when I know I will be using plex, I just go ahead and reboot the nas beforehand so I know its ready to go when everybody sits down to watch a movie.

Are you using VPN by any chance?

192.168.0.117

shouldnt the IP be set to 192.168.1.117? I dont believe .0. is even possible unless user has some really custom networking going on, Also this is a pretty old NAS.

One recommendation is that once plex player is set up initially, to bind the IP of server to config that way it doesnt have to “look” for the server it already connected to and claimed in the first place (not sure if you are already doing that). Highly unlikely that the local IP would change unless user sets up a new router or totally resets a router in which case you can handle with additional checks to continue PMS ip searching on the network as usual. It’s always recommended to bind the PMS ip on the router anyway so that it can’t ever change unless the user does one of the above manual changes. Might want to add that to the setup instructions for PMS.

Thanks!
Not using a VPN
Just updated to 1.27.0.5897, but will take a day or so to see if that helps.
Think your comments are to BigWheel, but my network interface is set to “any.” Have not set-up anything else.

0 as a third octet for a local IP range is pretty standard. Router brands will often use a 0 or a 1. Lots of people like myself change the third octet manually for a tad bit of security by way of obscurity.

@bus275 I do need to wait for someone that knows more about Synology than me to ask a few question but please let me know if the update helps

Thank you. Will let you know how it goes!

If I may add here?

Go to Control Panel - Network.

Look at (EDIT) each of your network adapters.

Make certain you have one selected as the Default Gateway.

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For good practice, you should login to your router and bind the IP or mac of your PMS to its ipv6 address ( in your case 192.168.0.117) and label that device. IIRC DSM also lets you do this through the UI web page in the networking tab of control center. I don’t think it’s related to your issue but will help rule out any future ip related issues especially if you set up remote connection to the pms.

If I may add re IPv6? Plex isn’t going to take advantage of IPv6.
You need IPv4

I also recommend setting the IP address of the Syno to MANUAL (Static IP).

This prevents the modem/router from causing the adapters to reset every time the LAN IP address is refreshed

Appreciate the help! I have selected 192.168.1.117 as Default and set to Manual.
Will report in a day or two the results.

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