I’ve run into a situation were the local instance of Plex Server can no longer be accessed unless the Plex server instance is restarted (via the system tray, for example).
Normally, navigating to https://127.0.0.1:3200/web/ or the machine’s LAN IP lets you access the Plex server instance. However, when this issue occurs, Plex seems to no longer accept new connections and never responds to requests on either the loopback interface, LAN IP, or via plex.tv, regardless of which machine is attempting the connection (same machine, machine on the LAN, or via WAN).
The only indication that something is wrong is the fact that the logs show something along the following whenever new requests are made:
Jun 23, 2022 19:31:55.662 [1588] DEBUG - CERT: incomplete TLS handshake from [::ffff:192.168.1.100]:57085: sslv3 alert certificate unknown
Jun 23, 2022 19:32:15.847 [1588] DEBUG - CERT: incomplete TLS handshake from [::ffff:192.168.1.100]:57115: sslv3 alert certificate unknown
Jun 23, 2022 19:32:25.328 [1588] DEBUG - CERT: incomplete TLS handshake from [::ffff:192.168.1.100]:57133: sslv3 alert certificate unknown
Jun 23, 2022 19:37:55.338 [1588] DEBUG - CERT: incomplete TLS handshake from [::ffff:127.0.0.1]:61437: sslv3 alert certificate unknown
Jun 23, 2022 19:37:57.416 [1588] DEBUG - CERT: incomplete TLS handshake from [::ffff:127.0.0.1]:61444: sslv3 alert certificate unknown
Jun 23, 2022 19:38:00.324 [1588] DEBUG - CERT: incomplete TLS handshake from [::ffff:127.0.0.1]:61457: sslv3 alert certificate unknown
Jun 23, 2022 19:38:01.762 [1588] DEBUG - CERT: incomplete TLS handshake from [::ffff:127.0.0.1]:61472: sslv3 alert certificate unknown
Jun 23, 2022 19:38:13.823 [1588] DEBUG - CERT: incomplete TLS handshake from [::ffff:127.0.0.1]:61564: sslv3 alert certificate unknown
Jun 23, 2022 19:38:16.061 [1588] DEBUG - CERT: incomplete TLS handshake from [::ffff:127.0.0.1]:61580: sslv3 alert certificate unknown
Jun 23, 2022 19:38:20.713 [1588] DEBUG - CERT: incomplete TLS handshake from [::ffff:127.0.0.1]:61603: sslv3 alert certificate unknown
Jun 23, 2022 19:38:25.521 [1588] DEBUG - CERT: incomplete TLS handshake from [::ffff:192.168.1.101]:61633: sslv3 alert certificate unknown
Jun 23, 2022 19:38:27.891 [1588] DEBUG - CERT: incomplete TLS handshake from [::ffff:192.168.1.101]:61653: sslv3 alert certificate unknown
Jun 23, 2022 19:38:29.253 [1588] DEBUG - CERT: incomplete TLS handshake from [::ffff:192.168.1.101]:61671: sslv3 alert certificate unknown
Jun 23, 2022 19:38:40.861 [1588] DEBUG - CERT: incomplete TLS handshake from [::ffff:192.168.1.101]:61749: sslv3 alert certificate unknown
Jun 23, 2022 19:38:45.738 [1588] DEBUG - CERT: incomplete TLS handshake from [::ffff:192.168.1.101]:61774: sslv3 alert certificate unknown
I’ve noticed this with older builds (several months ago so I don’t have the version number) as well as with the current version as of me posting this, 1.27.1.5916.
All other applications on the machine that are listening for network connections still work. As far as I can tell, all of the Plex processes that normally run are still running.
I forgot to check Resource Monitor/netstat to see if Plex’s processes are still listening on all the ports they need to be, but will do so next time this happens, though based on the logs it seems like they still might be (otherwise why would those TLS handshake errors appear?).
Any insight into why this might be happening would be appreciated.
