Not sure what happened, but the UI just stopped responding. I can still FTP to the server, but Plex wasn't working, so was trying to restart the docker, but can't connect to the UI.

 

Checked the nginx logs and there are a few errors from today, mostly similar to this:
 

2018/04/09 15:33:37 [error] 3807#3807: *15222439 upstream timed out (110: Connection timed out) while reading response header from upstream, client: 192.168.3.3, server: , request: "GET /Main HTTP/1.1", upstream: "fastcgi://unix:/var/run/php5-fpm.sock", host: "192.168.3.107", referrer: "http://192.168.3.107/Settings/Scheduler"
 

2018/04/09 15:35:38 [error] 3807#3807: *15222439 upstream timed out (110: Connection timed out) while reading response header from upstream, client: 192.168.3.3, server: , request: "GET /favicon.ico HTTP/1.1", upstream: "fastcgi://unix:/var/run/php5-fpm.sock", host: "192.168.3.107", referrer: "http://192.168.3.107/Main"
 

Everything had been working fine for months. Haven't done anything new other than add media to Plex, and even then it was fine. I assume a restart will fix this, but still wanted to post it anyway.

Went to syslog, and found something a little different from earlier today:
Apr  9 15:00:17 Tower php-fpm[3781]: [WARNING] [pool www] server reached max_children setting (20), consider raising it

 

Any other logs I should check or things I should look for?  I just don't want to try restarting it then lose access to all of this fun stuff if it doesn't come back up.

Everything ended up freezing up on me. My Putty connection to the server was non-responsive after a few minutes, then FTP wouldn't let me connect anymore. So had to restart it manually. It's back up and running.. *Shrugs*  Just wish I knew why this issue occurred in the first place.