[14:17:29] [Server thread/FATAL]: Error executing task
java.util.concurrent.ExecutionException: java.lang.IllegalStateException: Too many channels registered
	at java.util.concurrent.FutureTask.report(FutureTask.java:122) ~[?:1.8.0_121]
	at java.util.concurrent.FutureTask.get(FutureTask.java:192) ~[?:1.8.0_121]
	at net.minecraft.server.v1_11_R1.SystemUtils.a(SourceFile:47) [Spigot.jar:git-Spigot-54ec0b8-7b044de]
	at net.minecraft.server.v1_11_R1.MinecraftServer.D(MinecraftServer.java:747) [Spigot.jar:git-Spigot-54ec0b8-7b044de]
	at net.minecraft.server.v1_11_R1.DedicatedServer.D(DedicatedServer.java:399) [Spigot.jar:git-Spigot-54ec0b8-7b044de]
	at net.minecraft.server.v1_11_R1.MinecraftServer.C(MinecraftServer.java:678) [Spigot.jar:git-Spigot-54ec0b8-7b044de]
	at net.minecraft.server.v1_11_R1.MinecraftServer.run(MinecraftServer.java:576) [Spigot.jar:git-Spigot-54ec0b8-7b044de]
	at java.lang.Thread.run(Thread.java:745) [?:1.8.0_121]
Caused by: java.lang.IllegalStateException: Too many channels registered
	at com.google.common.base.Preconditions.checkState(Preconditions.java:176) ~[Spigot.jar:git-Spigot-54ec0b8-7b044de]
	at org.bukkit.craftbukkit.v1_11_R1.entity.CraftPlayer.addChannel(CraftPlayer.java:1099) ~[Spigot.jar:git-Spigot-54ec0b8-7b044de]
	at net.minecraft.server.v1_11_R1.PlayerConnection.a(PlayerConnection.java:2503) ~[Spigot.jar:git-Spigot-54ec0b8-7b044de]
	at net.minecraft.server.v1_11_R1.PacketPlayInCustomPayload.a(SourceFile:58) ~[Spigot.jar:git-Spigot-54ec0b8-7b044de]
	at net.minecraft.server.v1_11_R1.PacketPlayInCustomPayload.a(SourceFile:8) ~[Spigot.jar:git-Spigot-54ec0b8-7b044de]
	at net.minecraft.server.v1_11_R1.PlayerConnectionUtils$1.run(SourceFile:13) ~[Spigot.jar:git-Spigot-54ec0b8-7b044de]
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) ~[?:1.8.0_121]
	at java.util.concurrent.FutureTask.run(FutureTask.java:266) ~[?:1.8.0_121]
	at net.minecraft.server.v1_11_R1.SystemUtils.a(SourceFile:46) ~[Spigot.jar:git-Spigot-54ec0b8-7b044de]
	... 5 more
[14:17:29] [Server thread/FATAL]: Error executing task
java.util.concurrent.ExecutionException: java.lang.IllegalStateException: Too many channels registered
	at java.util.concurrent.FutureTask.report(FutureTask.java:122) ~[?:1.8.0_121]
	at java.util.concurrent.FutureTask.get(FutureTask.java:192) ~[?:1.8.0_121]
	at net.minecraft.server.v1_11_R1.SystemUtils.a(SourceFile:47) [Spigot.jar:git-Spigot-54ec0b8-7b044de]
	at net.minecraft.server.v1_11_R1.MinecraftServer.D(MinecraftServer.java:747) [Spigot.jar:git-Spigot-54ec0b8-7b044de]
	at net.minecraft.server.v1_11_R1.DedicatedServer.D(DedicatedServer.java:399) [Spigot.jar:git-Spigot-54ec0b8-7b044de]
	at net.minecraft.server.v1_11_R1.MinecraftServer.C(MinecraftServer.java:678) [Spigot.jar:git-Spigot-54ec0b8-7b044de]
	at net.minecraft.server.v1_11_R1.MinecraftServer.run(MinecraftServer.java:576) [Spigot.jar:git-Spigot-54ec0b8-7b044de]
	at java.lang.Thread.run(Thread.java:745) [?:1.8.0_121]
Caused by: java.lang.IllegalStateException: Too many channels registered
	at com.google.common.base.Preconditions.checkState(Preconditions.java:176) ~[Spigot.jar:git-Spigot-54ec0b8-7b044de]
	at org.bukkit.craftbukkit.v1_11_R1.entity.CraftPlayer.addChannel(CraftPlayer.java:1099) ~[Spigot.jar:git-Spigot-54ec0b8-7b044de]
	at net.minecraft.server.v1_11_R1.PlayerConnection.a(PlayerConnection.java:2503) ~[Spigot.jar:git-Spigot-54ec0b8-7b044de]
	at net.minecraft.server.v1_11_R1.PacketPlayInCustomPayload.a(SourceFile:58) ~[Spigot.jar:git-Spigot-54ec0b8-7b044de]
	at net.minecraft.server.v1_11_R1.PacketPlayInCustomPayload.a(SourceFile:8) ~[Spigot.jar:git-Spigot-54ec0b8-7b044de]
	at net.minecraft.server.v1_11_R1.PlayerConnectionUtils$1.run(SourceFile:13) ~[Spigot.jar:git-Spigot-54ec0b8-7b044de]
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) ~[?:1.8.0_121]
	at java.util.concurrent.FutureTask.run(FutureTask.java:266) ~[?:1.8.0_121]
	at net.minecraft.server.v1_11_R1.SystemUtils.a(SourceFile:46) ~[Spigot.jar:git-Spigot-54ec0b8-7b044de]
	... 5 more