Intermittent server crash on 18w46a

Server intermittently crashes with the following message on console: 

[17:16:10] [Server Watchdog/FATAL]: A single server tick took 60.07 seconds (should be max 0.05)
[17:16:10] [Server Watchdog/FATAL]: Considering it to be crashed, server will forcibly shutdown.
[17:16:11] [Server Watchdog/ERROR]: This crash report has been saved to: /usr/local/minecraft-server2/./crash-reports/crash-2018-11-18_17.16.11-server.txt
[17:16:11] [Server Shutdown Thread/INFO]: Stopping server
[17:16:11] [Server Shutdown Thread/INFO]: Saving players

 

Restarting the server normally brings it back up without issue. Behavior was not seen on previous snapshot, however I only ran that for a few days before updating. This has happened twice so far, about 22 1/2 hours apart. Let me know if further logs or server access are needed.