My Spigot 1.13.2 server is approx. 5 days old, and starting yesterday (12/23/18) began crashing frequently and inconsistently (sometimes we can play for a bit, other times it goes down right after joining.) Everyone either times out or gets the following message when it goes down: internal exception: "java.ioexception: an existing connection was forcibly closed by the remote host." After the first crashes I went back and made sure that I hadn't added any new plugins, and I hadn't since a couple days prior. I've tried deleting some plugins which I deemed unnecessary, and finally ended up with the following plugins: AutoColor, CustomEnchantments, EasySetSpawn, Factions, Factionshop, Greatkits, LuckPerms, MassiveCore, MineableSpawners, ObsidianBreaker, Sethome, SimpleTPA, Vault, WorldEdit, and gMoney. The frequent crashes combined with enormous queues has made it a frustrating last 24 hours.
Here is the most recent log, taken from the last crash.