[12:09:57] [Server thread/ERROR]: Could not pass event PlayerQuitEvent to BattleArena v3.9.7.8
org.bukkit.event.EventException
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:294) ~[craftbukkit.jar:git-Spigot-1484]
	at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[craftbukkit.jar:git-Spigot-1484]
	at org.bukkit.plugin.TimedRegisteredListener.callEvent(TimedRegisteredListener.java:47) ~[craftbukkit.jar:git-Spigot-1484]
	at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:502) [craftbukkit.jar:git-Spigot-1484]
	at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:487) [craftbukkit.jar:git-Spigot-1484]
	at net.minecraft.server.v1_7_R3.PlayerList.disconnect(PlayerList.java:321) [craftbukkit.jar:git-Spigot-1484]
	at net.minecraft.server.v1_7_R3.PlayerConnection.a(PlayerConnection.java:718) [craftbukkit.jar:git-Spigot-1484]
	at net.minecraft.server.v1_7_R3.ServerConnection.c(ServerConnection.java:77) [craftbukkit.jar:git-Spigot-1484]
	at net.minecraft.server.v1_7_R3.MinecraftServer.v(MinecraftServer.java:720) [craftbukkit.jar:git-Spigot-1484]
	at net.minecraft.server.v1_7_R3.DedicatedServer.v(DedicatedServer.java:283) [craftbukkit.jar:git-Spigot-1484]
	at net.minecraft.server.v1_7_R3.MinecraftServer.u(MinecraftServer.java:583) [craftbukkit.jar:git-Spigot-1484]
	at net.minecraft.server.v1_7_R3.MinecraftServer.run(MinecraftServer.java:489) [craftbukkit.jar:git-Spigot-1484]
	at net.minecraft.server.v1_7_R3.ThreadServerApplication.run(SourceFile:628) [craftbukkit.jar:git-Spigot-1484]
Caused by: java.lang.OutOfMemoryError: PermGen space