When issuing the command /summon ThrownEnderpearl, the following error occurs in console:

[14:56:02 INFO]: ajthemacboy issued server command: /summon ThrownEnderpearl
[14:56:02 WARN]: java.lang.NoSuchMethodException: net.minecraft.server.v1_8_R1.E
ntityEnderPearl.<init>(net.minecraft.server.v1_8_R1.World)
[14:56:02 WARN]: at java.lang.Class.getConstructor0(Class.java:2892)
[14:56:02 WARN]: at java.lang.Class.getConstructor(Class.java:1723)
[14:56:02 WARN]: at net.minecraft.server.v1_8_R1.EntityTypes.a(SourceFile
:175)
[14:56:02 WARN]: at net.minecraft.server.v1_8_R1.CommandSummon.execute(So
urceFile:87)
[14:56:02 WARN]: at org.bukkit.craftbukkit.v1_8_R1.command.VanillaCommand
Wrapper.dispatchVanillaCommand(VanillaCommandWrapper.java:91)
[14:56:02 WARN]: at org.bukkit.craftbukkit.v1_8_R1.command.VanillaCommand
Wrapper.execute(VanillaCommandWrapper.java:42)
[14:56:02 WARN]: at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCo
mmandMap.java:141)
[14:56:02 WARN]: at org.bukkit.craftbukkit.v1_8_R1.CraftServer.dispatchCo
mmand(CraftServer.java:645)
[14:56:02 WARN]: at net.minecraft.server.v1_8_R1.PlayerConnection.handleC
ommand(PlayerConnection.java:1115)
[14:56:02 WARN]: at net.minecraft.server.v1_8_R1.PlayerConnection.a(Playe
rConnection.java:950)
[14:56:02 WARN]: at net.minecraft.server.v1_8_R1.PacketPlayInChat.a(Packe
tPlayInChat.java:26)
[14:56:02 WARN]: at net.minecraft.server.v1_8_R1.PacketPlayInChat.a(Packe
tPlayInChat.java:53)
[14:56:02 WARN]: at net.minecraft.server.v1_8_R1.PacketHandleTask.run(Sou
rceFile:13)
[14:56:02 WARN]: at java.util.concurrent.Executors$RunnableAdapter.call(E
xecutors.java:471)
[14:56:02 WARN]: at java.util.concurrent.FutureTask.run(FutureTask.java:2
62)
[14:56:02 WARN]: at net.minecraft.server.v1_8_R1.MinecraftServer.z(Minecr
aftServer.java:683)
[14:56:02 WARN]: at net.minecraft.server.v1_8_R1.DedicatedServer.z(Dedica
tedServer.java:316)
[14:56:02 WARN]: at net.minecraft.server.v1_8_R1.MinecraftServer.y(Minecr
aftServer.java:623)
[14:56:02 WARN]: at net.minecraft.server.v1_8_R1.MinecraftServer.run(Mine
craftServer.java:526)
[14:56:02 WARN]: at java.lang.Thread.run(Thread.java:745)
[14:56:02 WARN]: Skipping Entity with id ThrownEnderpearl