[04:03:23] [Server thread/INFO]: [PwnFilter] Disabling all listeners
[04:03:23] [Server thread/ERROR]: null
org.bukkit.command.CommandException: Unhandled exception executing command 'pfreload' in plugin PwnFilter v3.3.1
	at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46) ~[spigot_server.jar:git-Spigot-2f787bd-5b27641]
	at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:141) ~[spigot_server.jar:git-Spigot-2f787bd-5b27641]
	at org.bukkit.craftbukkit.v1_8_R2.CraftServer.dispatchCommand(CraftServer.java:646) ~[spigot_server.jar:git-Spigot-2f787bd-5b27641]
	at net.minecraft.server.v1_8_R2.PlayerConnection.handleCommand(PlayerConnection.java:1138) [spigot_server.jar:git-Spigot-2f787bd-5b27641]
	at net.minecraft.server.v1_8_R2.PlayerConnection.a(PlayerConnection.java:973) [spigot_server.jar:git-Spigot-2f787bd-5b27641]
	at net.minecraft.server.v1_8_R2.PacketPlayInChat.a(PacketPlayInChat.java:45) [spigot_server.jar:git-Spigot-2f787bd-5b27641]
	at net.minecraft.server.v1_8_R2.PacketPlayInChat.a(PacketPlayInChat.java:1) [spigot_server.jar:git-Spigot-2f787bd-5b27641]
	at net.minecraft.server.v1_8_R2.PlayerConnectionUtils$1.run(SourceFile:13) [spigot_server.jar:git-Spigot-2f787bd-5b27641]
	at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [?:1.7.0_71]
	at java.util.concurrent.FutureTask.run(Unknown Source) [?:1.7.0_71]
	at net.minecraft.server.v1_8_R2.SystemUtils.a(SourceFile:60) [spigot_server.jar:git-Spigot-2f787bd-5b27641]
	at net.minecraft.server.v1_8_R2.MinecraftServer.A(MinecraftServer.java:710) [spigot_server.jar:git-Spigot-2f787bd-5b27641]
	at net.minecraft.server.v1_8_R2.DedicatedServer.A(DedicatedServer.java:368) [spigot_server.jar:git-Spigot-2f787bd-5b27641]
	at net.minecraft.server.v1_8_R2.MinecraftServer.z(MinecraftServer.java:651) [spigot_server.jar:git-Spigot-2f787bd-5b27641]
	at net.minecraft.server.v1_8_R2.MinecraftServer.run(MinecraftServer.java:554) [spigot_server.jar:git-Spigot-2f787bd-5b27641]
	at java.lang.Thread.run(Unknown Source) [?:1.7.0_71]
Caused by: java.util.ConcurrentModificationException
	at java.util.HashMap$HashIterator.nextEntry(Unknown Source) ~[?:1.7.0_71]
	at java.util.HashMap$KeyIterator.next(Unknown Source) ~[?:1.7.0_71]
	at com.pwn9.PwnFilter.DataCache.stop(DataCache.java:106) ~[?:?]
	at com.pwn9.PwnFilter.command.pfreload.onCommand(pfreload.java:46) ~[?:?]
	at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) ~[spigot_server.jar:git-Spigot-2f787bd-5b27641]
	... 15 more