Unknown Internal Server Error

I am getting kicked form the server randomly on commands sometimes the command will kick me sometimes it wont, some commands always kick me. The one that always kicks shows an inventory. Here is the error, spigot 1.7.9

Code:

[00:08:06] [Server thread/WARN]: Failed to handle packet for /<edited Out>
java.lang.NullPointerException
    at org.apache.logging.log4j.core.config.AppenderControl.callAppender(AppenderControl.java:101) ~[spigot.jar:git-Spigot-1459]
    at org.apache.logging.log4j.core.config.LoggerConfig.callAppenders(LoggerConfig.java:425) ~[spigot.jar:git-Spigot-1459]
    at org.apache.logging.log4j.core.config.LoggerConfig.log(LoggerConfig.java:406) ~[spigot.jar:git-Spigot-1459]
    at org.apache.logging.log4j.core.config.LoggerConfig.log(LoggerConfig.java:367) [spigot.jar:git-Spigot-1459]
    at org.apache.logging.log4j.core.Logger.log(Logger.java:110) [spigot.jar:git-Spigot-1459]
    at org.apache.logging.log4j.spi.AbstractLogger.error(AbstractLogger.java:609) [spigot.jar:git-Spigot-1459]
    at org.bukkit.craftbukkit.v1_7_R3.util.ForwardLogHandler.publish(ForwardLogHandler.java:33) ~[spigot.jar:git-Spigot-1459]
    at java.util.logging.Logger.log(Logger.java:610) ~[?:1.7.0_51]
    at java.util.logging.Logger.doLog(Logger.java:631) ~[?:1.7.0_51]
    at java.util.logging.Logger.log(Logger.java:720) ~[?:1.7.0_51]
    at net.minecraft.server.v1_7_R3.PlayerConnection.handleCommand(PlayerConnection.java:991) ~[spigot.jar:git-Spigot-1459]
    at net.minecraft.server.v1_7_R3.PlayerConnection.a(PlayerConnection.java:830) ~[spigot.jar:git-Spigot-1459]
    at net.minecraft.server.v1_7_R3.PacketPlayInChat.a(PacketPlayInChat.java:28) ~[spigot.jar:git-Spigot-1459]
    at net.minecraft.server.v1_7_R3.PacketPlayInChat.handle(PacketPlayInChat.java:65) ~[spigot.jar:git-Spigot-1459]
    at net.minecraft.server.v1_7_R3.NetworkManager.a(NetworkManager.java:180) ~[spigot.jar:git-Spigot-1459]
    at net.minecraft.server.v1_7_R3.ServerConnection.c(ServerConnection.java:81) [spigot.jar:git-Spigot-1459]
    at net.minecraft.server.v1_7_R3.MinecraftServer.v(MinecraftServer.java:713) [spigot.jar:git-Spigot-1459]
    at net.minecraft.server.v1_7_R3.DedicatedServer.v(DedicatedServer.java:283) [spigot.jar:git-Spigot-1459]
    at net.minecraft.server.v1_7_R3.MinecraftServer.u(MinecraftServer.java:576) [spigot.jar:git-Spigot-1459]
    at net.minecraft.server.v1_7_R3.MinecraftServer.run(MinecraftServer.java:482) [spigot.jar:git-Spigot-1459]
    at net.minecraft.server.v1_7_R3.ThreadServerApplication.run(SourceFile:628) [spigot.jar:git-Spigot-1459]

 

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