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  1. Minecraft: Java Edition
  2. MC-86714

Minecraft won't let me go on servers or go into my worlds(java.lang.IllegalStateException: failed to create a child event loop)

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    • Icon: Bug Bug
    • Resolution: Duplicate
    • None
    • Minecraft 1.8.8
    • None
    • HP with A4 Vision AMD Dual core processor with AMD radeon graphics
    • Unconfirmed

      Step 1. I launch minecraft
      Step 2. I try to load multiplayer(I cannot)
      Step 3. I try to load singleplayer
      Then MC crashes and displays this:
      ---- Minecraft Crash Report ----
      // Who set us up the TNT?

      Time: 8/19/15 5:11 PM
      Description: Updating screen events

      java.lang.IllegalStateException: failed to create a child event loop
      at io.netty.util.concurrent.MultithreadEventExecutorGroup.<init>(MultithreadEventExecutorGroup.java:68)
      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 ll$1.a(SourceFile:44)
      at ll$1.b(SourceFile:41)
      at no.c(SourceFile:10)
      at ll.a(SourceFile:121)
      at ave.a(SourceFile:1941)
      at axv.i(SourceFile:172)
      at axv.a(SourceFile:135)
      at axu.a(SourceFile:350)
      at axu.k(SourceFile:413)
      at axv.k(SourceFile:81)
      at axu.p(SourceFile:390)
      at ave.s(SourceFile:1497)
      at ave.av(SourceFile:888)
      at ave.a(SourceFile:325)
      at net.minecraft.client.main.Main.main(SourceFile:124)
      Caused by: io.netty.channel.ChannelException: failed to open a new selector
      at io.netty.channel.nio.NioEventLoop.openSelector(NioEventLoop.java:128)
      at io.netty.channel.nio.NioEventLoop.<init>(NioEventLoop.java:120)
      at io.netty.channel.nio.NioEventLoopGroup.newChild(NioEventLoopGroup.java:87)
      at io.netty.util.concurrent.MultithreadEventExecutorGroup.<init>(MultithreadEventExecutorGroup.java:64)
      ... 18 more
      Caused by: java.io.IOException: Unable to establish loopback connection
      at sun.nio.ch.PipeImpl$Initializer.run(PipeImpl.java:101)
      at sun.nio.ch.PipeImpl$Initializer.run(PipeImpl.java:68)
      at java.security.AccessController.doPrivileged(Native Method)
      at sun.nio.ch.PipeImpl.<init>(PipeImpl.java:170)
      at sun.nio.ch.SelectorProviderImpl.openPipe(SelectorProviderImpl.java:50)
      at java.nio.channels.Pipe.open(Pipe.java:155)
      at sun.nio.ch.WindowsSelectorImpl.<init>(WindowsSelectorImpl.java:127)
      at sun.nio.ch.WindowsSelectorProvider.openSelector(WindowsSelectorProvider.java:44)
      at io.netty.channel.nio.NioEventLoop.openSelector(NioEventLoop.java:126)
      ... 21 more
      Caused by: java.net.ConnectException: Connection timed out: connect
      at sun.nio.ch.Net.connect0(Native Method)
      at sun.nio.ch.Net.connect(Net.java:457)
      at sun.nio.ch.Net.connect(Net.java:449)
      at sun.nio.ch.SocketChannelImpl.connect(SocketChannelImpl.java:647)
      at java.nio.channels.SocketChannel.open(SocketChannel.java:189)
      at sun.nio.ch.PipeImpl$Initializer$LoopbackConnector.run(PipeImpl.java:130)
      at sun.nio.ch.PipeImpl$Initializer.run(PipeImpl.java:83)
      ... 29 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:68)
      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 ll$1.a(SourceFile:44)
      at ll$1.b(SourceFile:41)
      at no.c(SourceFile:10)
      at ll.a(SourceFile:121)
      at ave.a(SourceFile:1941)
      at axv.i(SourceFile:172)
      at axv.a(SourceFile:135)
      at axu.a(SourceFile:350)
      at axu.k(SourceFile:413)
      at axv.k(SourceFile:81)
      at axu.p(SourceFile:390)

      – Affected screen –
      Details:
      Screen name: aya
      Stacktrace:
      at ave.s(SourceFile:1497)
      at ave.av(SourceFile:888)
      at ave.a(SourceFile:325)
      at net.minecraft.client.main.Main.main(SourceFile:124)

      – System Details –
      Details:
      Minecraft Version: 1.8.7
      Operating System: Windows 7 (amd64) version 6.1
      CPU: 2x AMD A4-3305M APU with Radeon(tm) HD Graphics
      Java Version: 1.8.0_25, Oracle Corporation
      Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
      Memory: 320498912 bytes (305 MB) / 745017344 bytes (710 MB) up to 1060372480 bytes (1011 MB)
      JVM Flags: 6 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M
      IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
      Launched Version: 1.8.7
      LWJGL: 2.9.4
      OpenGL: AMD Radeon(TM) HD 6480G GL version 4.1.11156 Compatibility Profile Context, ATI Technologies Inc.
      GL Caps: Using GL 1.3 multitexturing.
      Using GL 1.3 texture combiners.
      Using framebuffer objects because OpenGL 3.0 is supported and separate blending is supported.
      Shaders are available because OpenGL 2.1 is supported.
      VBOs are available because OpenGL 1.5 is supported.

      Using VBOs: No
      Is Modded: Probably not. Jar signature remains and client brand is untouched.
      Type: Client (map_client.txt)
      Resource Packs: [Sphax PureBDcraft 256x MC17.zip]
      Current Language: English (US)
      Profiler Position: N/A (disabled)

            Unassigned Unassigned
            FrostBreath23 Steven DePolo
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              Created:
              Updated:
              Resolved: