Terrible Server Issues With Pixelmon & SpongeForge

I own a Pixelmon server running builds 600 and up and it has been great but now it just hit my server really hard with lag spikes and issues that the server decides to time out with errors in console just constantly. If someone can just explain to me why this is going on because I try to optimize my server to the max but still no solution. Even when I try to shut down the server, so much lag occurs that the server doesn’t even recognize its being shut down until it gets terminated via signal.

Errors I’m talking about include server fallbacks.
http://paste.ubuntu.com/15212384/

Also times when the server frezzes with nothing in console until this is pops up
26.02 22:42:32 [Server] Netty Epoll Server IO #8/ERROR [FML]: NetworkDispatcher exception
26.02 22:42:32 [Server] INFO io.netty.handler.timeout.ReadTimeoutException

Server Specs:

  • Intel Xeon E5-1650v2 @ 3.50Ghz
  • Solid State Drives on RAID 1
  • 1Gbps Uplink
  • 16384 MB RAM
  • Plugins (25): Minecraft, Minecraft Coder Pack, Forge Mod Loader, Minecraft Forge, SpongeForge, ActionBroadcaster, AdminShop, Command Scheduler, EnjinMinecraftPlugin, EssentialCmds, Inspector, Scoreboard, Keys, Kits, NuVotifier, PermissionsEx, Pixelmon, Pixel Extras, Polis, ServerListPlus, VotifierListener, Total Economy, Twenty Ticks, Wonder Trade, WorldEdit

This is getting to the point where my community is dead and its not a server anymore. Any help is appreciated.

You might want to use something like WarmRoast, or @Aikar’s timings patches which are built into Sponge (accessible through the global config), to identify what’s slowing down the server.