I am getting this on Ubuntu 18.04.2 LTS. I run on VMWare and this VM is dedicated to just Plex.
Apr 23 08:58:54 plexserver sh[1965]: Connection to xxx.xxx.xxx.xxx closed by remote host.
Apr 23 10:27:15 plexserver sh[1965]: Connection to xxx.xxx.xxx.xxx closed by remote host.
Apr 23 10:37:41 plexserver sh[1965]: Connection to xxx.xxx.xxx.xxx closed by remote host.
Apr 23 10:45:26 plexserver sh[1965]: Connection to xxx.xxx.xxx.xxx closed by remote host.
Apr 23 11:46:32 plexserver sh[1965]: Connection to xxx.xxx.xxx.xxx closed by remote host.
Apr 23 13:14:57 plexserver sh[1965]: Connection to xxx.xxx.xxx.xxx closed by remote host.
Apr 23 13:30:29 plexserver sh[1965]: Connection to xxx.xxx.xxx.xxx closed by remote host.
Apr 23 15:18:11 plexserver sh[1965]: Connection to xxx.xxx.xxx.xxx closed by remote host.
Apr 23 16:25:27 plexserver sh[1965]: double free or corruption (!prev)
Apr 23 16:25:28 plexserver sh[1965]: ****** PLEX MEDIA SERVER CRASHED, CRASH REPORT WRITTEN: /var/lib/plexmediaserver/Library/Application Support/Plex Media Server/Crash Reports/1.15.3.876-ad6e39743/PLEX MEDIA SERVER/7319e5fb-2b59-411f-04f52709-7e653e6c.dmp
The VM has 64GB of memory and 12 CPU cores, this does not appear to be caused by system load. However it does appear to happen while someone is watching something and the transcoder is active. I can provide the dumps and logs if it helps beyond what’s already been posted here, just let me know.
This is really killing my install. I am going to try to downgrade to 1.14.x if possible for the time being.
