java.lang.IllegalStateException: failed to create a child event loop

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    • java.lang.IllegalStateException: failed to create a child event loop at io.netty.util.concurrent.MultithreadEventExecutorGroup.<init>(MultithreadEventExecutorGroup.java:61) at io.netty.channel.MultithreadEventLoopGroup.<init>(MultithreadEventLoopGroup.java:49) at io.netty.channel.nio.NioEventLoopGroup.<init>(NioEventLoopGroup.java:61) at io.netty.channel.nio.NioEventLoopGroup.<init>(NioEventLoopGroup.java:52) at net.minecraft.network.NetworkSystem$1.func_179286_a(NetworkSystem.java:53) at net.minecraft.network.NetworkSystem$1.func_179280_b(NetworkSystem.java:57) at net.minecraft.util.LazyLoadBase.func_179281_c(SourceFile:10) at net.minecraft.network.NetworkSystem.func_151270_a(NetworkSystem.java:131) at net.minecraft.client.Minecraft.func_71371_a(Minecraft.java:2217) at net.minecraftforge.fml.client.FMLClientHandler.tryLoadExistingWorld(FMLClientHandler.java:662) at net.minecraft.client.gui.GuiSelectWorld.func_146615_e(GuiSelectWorld.java:190) at net.minecraft.client.gui.GuiSelectWorld$List.func_148144_a(GuiSelectWorld.java:264) at net.minecraft.client.gui.GuiSlot.func_178039_p(GuiSlot.java:287) at net.minecraft.client.gui.GuiSelectWorld.func_146274_d(GuiSelectWorld.java:78) at net.minecraft.client.gui.GuiScreen.func_146269_k(GuiScreen.java:516) at net.minecraft.client.Minecraft.func_71407_l(Minecraft.java:1663) at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:1022) at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:345) at net.minecraft.client.main.Main.main(SourceFile:120) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at net.minecraft.launchwrapper.Launch.launch(Launch.java:135) at net.minecraft.launchwrapper.Launch.main(Launch.java:28) Caused by: io.netty.channel.ChannelException: failed to open a new selector at io.netty.channel.nio.NioEventLoop.openSelector(NioEventLoop.java:128) at io.netty.channel.nio.NioEventLoop.<init>(NioEventLoop.java:120) at io.netty.channel.nio.NioEventLoopGroup.newChild(NioEventLoopGroup.java:87) at io.netty.util.concurrent.MultithreadEventExecutorGroup.<init>(MultithreadEventExecutorGroup.java:57)

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