1.7.9 lag w/ Console Error

I just upgraded my survival server to 1.7.9 and the server has some regular lag. I've tried restarting the server and unloading chunks etc to no difference. The server tps is 20 when i do /lag and the RAM available is more than 90%. People will sometimes get kicked from the server as well. The only thing i could find in my console is this:

"net.minecraft.util.com.mojang.authlib.GameProfile@35e922de[id=<null>,name=MCI,properties={},legacy=false] (/198.27.83.157:40148) has disconnected, reason: Internal Exception: java.io.IOException: Connection reset by peer"

And

"Can't keep up! Did the system time change, or is the server overloaded? Running (X)ms behind, skipping (X) tick(s)

I'm not sure if this is a 1.7.9 r.0.1 issue? Or if there's an incompatibility between my plugins that would cause this? If there's a better place to post this or more information you need to help analyze this just let me know! Thanks for your time.

 

I dont seem to be getting that small lag spike at the moment anymore. But im still seeing that error in my console.