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  1. Minecraft: Java Edition
  2. MC-36984

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

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    • Icon: Bug Bug
    • Resolution: Duplicate
    • None
    • Minecraft 1.7
    • None
    • Unconfirmed

      This is an automatically generated report based from the following crash: http://hopper.minecraft.net/crashes/minecraft/MCX-442066/

      Crash:

      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 mr.<init>(SourceFile:37)
      	at net.minecraft.server.MinecraftServer.<init>(SourceFile:114)
      	at bsi.<init>(SourceFile:38)
      	at azc.a(SourceFile:1590)
      	at bcd.e(SourceFile:162)
      	at bcd.a(SourceFile:127)
      	at bcc.a(SourceFile:172)
      	at bcc.d(SourceFile:236)
      	at bcc.k(SourceFile:211)
      

      The following is the first clean report made public about this crash:

      ---- Minecraft Crash Report ----
      // On the bright side, I bought you a teddy bear!
      
      Time: 22/10/13 6:14 PM
      Description: Updating screen events
      
      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 mr.<init>(SourceFile:37)
      	at net.minecraft.server.MinecraftServer.<init>(SourceFile:114)
      	at bsi.<init>(SourceFile:38)
      	at azc.a(SourceFile:1590)
      	at bcd.e(SourceFile:162)
      	at bcd.a(SourceFile:127)
      	at bcc.a(SourceFile:172)
      	at bcc.d(SourceFile:236)
      	at bcc.k(SourceFile:211)
      	at azc.o(SourceFile:1303)
      	at azc.ad(SourceFile:753)
      	at azc.e(SourceFile:704)
      	at net.minecraft.client.main.Main.main(SourceFile:103)
      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)
      	... 16 more
      Caused by: java.io.IOException: Unable to establish loopback connection
      	at sun.nio.ch.PipeImpl$Initializer.run(Unknown Source)
      	at sun.nio.ch.PipeImpl$Initializer.run(Unknown Source)
      	at java.security.AccessController.doPrivileged(Native Method)
      	at sun.nio.ch.PipeImpl.<init>(Unknown Source)
      	at sun.nio.ch.SelectorProviderImpl.openPipe(Unknown Source)
      	at java.nio.channels.Pipe.open(Unknown Source)
      	at sun.nio.ch.WindowsSelectorImpl.<init>(Unknown Source)
      	at sun.nio.ch.WindowsSelectorProvider.openSelector(Unknown Source)
      	at io.netty.channel.nio.NioEventLoop.openSelector(NioEventLoop.java:126)
      	... 19 more
      Caused by: java.net.SocketException: Invalid argument: listen
      	at sun.nio.ch.Net.listen(Native Method)
      	at sun.nio.ch.ServerSocketChannelImpl.bind(Unknown Source)
      	at sun.nio.ch.ServerSocketAdaptor.bind(Unknown Source)
      	at sun.nio.ch.ServerSocketAdaptor.bind(Unknown Source)
      	... 28 more
      
      
      A detailed walkthrough of the error, its code path and all known details is as follows:
      ---------------------------------------------------------------------------------------
      
      -- Head --
      Stacktrace:
      	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 mr.<init>(SourceFile:37)
      	at net.minecraft.server.MinecraftServer.<init>(SourceFile:114)
      	at bsi.<init>(SourceFile:38)
      	at azc.a(SourceFile:1590)
      	at bcd.e(SourceFile:162)
      	at bcd.a(SourceFile:127)
      	at bcc.a(SourceFile:172)
      	at bcc.d(SourceFile:236)
      	at bcc.k(SourceFile:211)
      
      -- Affected screen --
      Details:
      	Screen name: bth
      Stacktrace:
      	at azc.o(SourceFile:1303)
      	at azc.ad(SourceFile:753)
      	at azc.e(SourceFile:704)
      	at net.minecraft.client.main.Main.main(SourceFile:103)
      
      -- System Details --
      Details:
      	Minecraft Version: 1.7
      	Operating System: Windows XP (x86) version 5.1
      	Java Version: 1.7.0_25, Oracle Corporation
      	Java VM Version: Java HotSpot(TM) Client VM (mixed mode, sharing), Oracle Corporation
      	Memory: 43459736 bytes (41 MB) / 79069184 bytes (75 MB) up to 518979584 bytes (494 MB)
      	JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx512M
      	AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
      	IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
      	Launched Version: 1.7
      	LWJGL: 2.9.0
      	OpenGL: GeForce 7050 PV / nForce 630a/integrated/SSE2/3DNOW! GL version 2.1.2, NVIDIA Corporation
      	Is Modded: Probably not. Jar signature remains and client brand is untouched.
      	Type: Client (map_client.txt)
      	Resource Packs: []
      	Current Language: English (US)
      	Profiler Position: N/A (disabled)
      	Vec3 Pool Size: ~~ERROR~~ NullPointerException: null
      	Anisotropic Filtering: Off (1)
      

      You can see this full report at http://hopper.minecraft.net/crashes/minecraft/MCX-442066/20656299/

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              Created:
              Updated:
              Resolved: