ah ok, sorry. You should delete that part of your post containing the ssh information.
1. next time use the code tags please:)
2. You need to recreate the issue with your plex plugin and *then* get the tail from messages
I think I figured out my issue. Turns out I had plex pointing at an NTFS drive I had dropped in and didn't reformat. Switched off of the NTFS drive and I've been running a day without issues.