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  1. Minecraft: Java Edition
  2. MC-144200

java.lang.IllegalStateException: failed to create a child event loop at io.netty.util.concurrent.MultithreadEventExecutorGroup

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    • Icon: Bug Bug
    • Resolution: Duplicate
    • None
    • Minecraft 1.13.2
    • None
    • Unconfirmed

      ---- Minecraft Crash Report ----
      // Shall we play a game?

      Time: 2/14/19 6:46 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$1.b(SourceFile:41)
      at no.c(SourceFile:10)
      at ll.a(SourceFile:121)
      at ave.a(SourceFile:1942)
      at axb.a(SourceFile:210)
      at axu.a(SourceFile:350)
      at axb.a(SourceFile:350)
      at axu.k(SourceFile:413)
      at axu.p(SourceFile:390)
      at ave.s(SourceFile:1498)
      at ave.av(SourceFile:889)
      at ave.a(SourceFile:325)
      at net.minecraft.client.main.Main.main(SourceFile:124)
      Caused by: io.netty.channel.ChannelException: failed to open a new selector
      at io.netty.channel.nio.NioEventLoop.openSelector(NioEventLoop.java:128)
      at io.netty.channel.nio.NioEventLoop.<init>(NioEventLoop.java:120)
      at io.netty.channel.nio.NioEventLoopGroup.newChild(NioEventLoopGroup.java:87)
      at io.netty.util.concurrent.MultithreadEventExecutorGroup.<init>(MultithreadEventExecutorGroup.java:64)
      ... 17 more
      Caused by: java.io.IOException: Unable to establish loopback connection
      at sun.nio.ch.PipeImpl$Initializer.run(PipeImpl.java:101)
      at sun.nio.ch.PipeImpl$Initializer.run(PipeImpl.java:68)
      at java.security.AccessController.doPrivileged(Native Method)
      at sun.nio.ch.PipeImpl.<init>(PipeImpl.java:170)
      at sun.nio.ch.SelectorProviderImpl.openPipe(SelectorProviderImpl.java:50)
      at java.nio.channels.Pipe.open(Pipe.java:155)
      at sun.nio.ch.WindowsSelectorImpl.<init>(WindowsSelectorImpl.java:127)
      at sun.nio.ch.WindowsSelectorProvider.openSelector(WindowsSelectorProvider.java:44)
      at io.netty.channel.nio.NioEventLoop.openSelector(NioEventLoop.java:126)
      ... 20 more
      Caused by: java.net.SocketException: Permission denied: connect
      at sun.nio.ch.Net.connect0(Native Method)
      at sun.nio.ch.Net.connect(Net.java:458)
      at sun.nio.ch.Net.connect(Net.java:450)
      at sun.nio.ch.SocketChannelImpl.connect(SocketChannelImpl.java:648)
      at java.nio.channels.SocketChannel.open(SocketChannel.java:189)
      at sun.nio.ch.PipeImpl$Initializer$LoopbackConnector.run(PipeImpl.java:130)
      at sun.nio.ch.PipeImpl$Initializer.run(PipeImpl.java:83)
      ... 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: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:1942)
      at axb.a(SourceFile:210)
      at axu.a(SourceFile:350)
      at axb.a(SourceFile:350)
      at axu.k(SourceFile:413)
      at axu.p(SourceFile:390)

      – Affected screen –
      Details:
      Screen name: aya
      Stacktrace:
      at ave.s(SourceFile:1498)
      at ave.av(SourceFile:889)
      at ave.a(SourceFile:325)
      at net.minecraft.client.main.Main.main(SourceFile:124)

      – System Details –
      Details:
      Minecraft Version: 1.8.8
      Operating System: Windows 10 (amd64) version 10.0
      Java Version: 1.8.0_51, Oracle Corporation
      Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
      Memory: 104770600 bytes (99 MB) / 301989888 bytes (288 MB) up to 2147483648 bytes (2048 MB)
      JVM Flags: 8 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx2G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M
      IntCache: cache: 0, tcache: 0, allocated: 13, tallocated: 95
      Launched Version: 1.8.8
      LWJGL: 2.9.4
      OpenGL: GeForce GTX 1060/PCIe/SSE2 GL version 4.6.0 NVIDIA 418.81, NVIDIA Corporation
      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: Yes
      Is Modded: Probably not. Jar signature remains and client brand is untouched.
      Type: Client (map_client.txt)
      Resource Packs: §4Stimpy §8Private §7Revamp §8[§f128x§8].zip
      Current Language: English (US)
      Profiler Position: N/A (disabled)
      CPU: 4x Intel(R) Core(TM) i5-7500T CPU @ 2.70GHz

            Unassigned Unassigned
            FoggyLight Derek Frogget
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              Created:
              Updated:
              Resolved: