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  1. Minecraft: Java Edition
  2. MC-235490

Failed child event loop

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    • Icon: Bug Bug
    • Resolution: Duplicate
    • None
    • 1.17.1
    • None
    • Unconfirmed
    • (Unassigned)

      ---- Minecraft Crash Report ----
      // I feel sad now

      Time: 8/28/21, 7:33 PM
      Description: mouseClicked event handler

      java.lang.IllegalStateException: failed to create a child event loop
      at io.netty.util.concurrent.MultithreadEventExecutorGroup.<init>(MultithreadEventExecutorGroup.java:88)
      at io.netty.util.concurrent.MultithreadEventExecutorGroup.<init>(MultithreadEventExecutorGroup.java:58)
      at io.netty.util.concurrent.MultithreadEventExecutorGroup.<init>(MultithreadEventExecutorGroup.java:47)
      at io.netty.channel.MultithreadEventLoopGroup.<init>(MultithreadEventLoopGroup.java:59)
      at io.netty.channel.nio.NioEventLoopGroup.<init>(NioEventLoopGroup.java:77)
      at io.netty.channel.nio.NioEventLoopGroup.<init>(NioEventLoopGroup.java:72)
      at io.netty.channel.nio.NioEventLoopGroup.<init>(NioEventLoopGroup.java:59)
      at aci.f(SourceFile:56)
      at com.google.common.base.Suppliers$NonSerializableMemoizingSupplier.get(Suppliers.java:160)
      at agx.a(SourceFile:19)
      at aci.a(SourceFile:148)
      at dvp.a(SourceFile:2083)
      at dvp.a(SourceFile:1939)
      at eel$a.h(SourceFile:437)
      at eel$a.b(SourceFile:343)
      at eel$a.a(SourceFile:279)
      at dww.a(SourceFile:359)
      at dxx.a(SourceFile:27)
      at dvq.b(SourceFile:94)
      at eaq.a(SourceFile:490)
      at dvq.a(SourceFile:94)
      at dvq.c(SourceFile:165)
      at aqv.execute(SourceFile:101)
      at dvq.b(SourceFile:165)
      at org.lwjgl.glfw.GLFWMouseButtonCallbackI.callback(GLFWMouseButtonCallbackI.java:36)
      at org.lwjgl.system.JNI.invokeV(Native Method)
      at org.lwjgl.glfw.GLFW.glfwPollEvents(GLFW.java:3101)
      at com.mojang.blaze3d.systems.RenderSystem.flipFrame(SourceFile:172)
      at dpr.e(SourceFile:310)
      at dvp.f(SourceFile:1137)
      at dvp.e(SourceFile:728)
      at net.minecraft.client.main.Main.main(SourceFile:217)
      Caused by: io.netty.channel.ChannelException: failed to open a new selector
      at io.netty.channel.nio.NioEventLoop.openSelector(NioEventLoop.java:177)
      at io.netty.channel.nio.NioEventLoop.<init>(NioEventLoop.java:151)
      at io.netty.channel.nio.NioEventLoopGroup.newChild(NioEventLoopGroup.java:127)
      at io.netty.channel.nio.NioEventLoopGroup.newChild(NioEventLoopGroup.java:36)
      at io.netty.util.concurrent.MultithreadEventExecutorGroup.<init>(MultithreadEventExecutorGroup.java:84)
      ... 31 more
      Caused by: java.io.IOException: Unable to establish loopback connection
      at java.base/sun.nio.ch.PipeImpl$Initializer.run(PipeImpl.java:101)
      at java.base/sun.nio.ch.PipeImpl$Initializer.run(PipeImpl.java:67)
      at java.base/java.security.AccessController.doPrivileged(AccessController.java:554)
      at java.base/sun.nio.ch.PipeImpl.<init>(PipeImpl.java:194)
      at java.base/sun.nio.ch.WindowsSelectorImpl.<init>(WindowsSelectorImpl.java:143)
      at java.base/sun.nio.ch.WindowsSelectorProvider.openSelector(WindowsSelectorProvider.java:44)
      at io.netty.channel.nio.NioEventLoop.openSelector(NioEventLoop.java:175)
      ... 35 more
      Caused by: java.net.SocketException: Invalid argument: connect
      at java.base/sun.nio.ch.Net.connect0(Native Method)
      at java.base/sun.nio.ch.Net.connect(Net.java:576)
      at java.base/sun.nio.ch.Net.connect(Net.java:583)
      at java.base/sun.nio.ch.SocketChannelImpl.connect(SocketChannelImpl.java:851)
      at java.base/java.nio.channels.SocketChannel.open(SocketChannel.java:285)
      at java.base/sun.nio.ch.PipeImpl$Initializer$LoopbackConnector.run(PipeImpl.java:131)
      at java.base/sun.nio.ch.PipeImpl$Initializer.run(PipeImpl.java:83)
      ... 41 more

      A detailed walkthrough of the error, its code path and all known details is as follows:
      ---------------------------------------------------------------------------------------

      – Head –
      Thread: Render thread
      Stacktrace:
      at io.netty.util.concurrent.MultithreadEventExecutorGroup.<init>(MultithreadEventExecutorGroup.java:88)
      at io.netty.util.concurrent.MultithreadEventExecutorGroup.<init>(MultithreadEventExecutorGroup.java:58)
      at io.netty.util.concurrent.MultithreadEventExecutorGroup.<init>(MultithreadEventExecutorGroup.java:47)
      at io.netty.channel.MultithreadEventLoopGroup.<init>(MultithreadEventLoopGroup.java:59)
      at io.netty.channel.nio.NioEventLoopGroup.<init>(NioEventLoopGroup.java:77)
      at io.netty.channel.nio.NioEventLoopGroup.<init>(NioEventLoopGroup.java:72)
      at io.netty.channel.nio.NioEventLoopGroup.<init>(NioEventLoopGroup.java:59)
      at aci.f(SourceFile:56)
      at com.google.common.base.Suppliers$NonSerializableMemoizingSupplier.get(Suppliers.java:160)
      at agx.a(SourceFile:19)
      at aci.a(SourceFile:148)
      at dvp.a(SourceFile:2083)
      at dvp.a(SourceFile:1939)
      at eel$a.h(SourceFile:437)
      at eel$a.b(SourceFile:343)
      at eel$a.a(SourceFile:279)
      at dww.a(SourceFile:359)
      at dxx.a(SourceFile:27)
      at dvq.b(SourceFile:94)

      – Affected screen –
      Details:
      Screen name: eei
      Stacktrace:
      at eaq.a(SourceFile:490)
      at dvq.a(SourceFile:94)
      at dvq.c(SourceFile:165)
      at aqv.execute(SourceFile:101)
      at dvq.b(SourceFile:165)
      at org.lwjgl.glfw.GLFWMouseButtonCallbackI.callback(GLFWMouseButtonCallbackI.java:36)
      at org.lwjgl.system.JNI.invokeV(Native Method)
      at org.lwjgl.glfw.GLFW.glfwPollEvents(GLFW.java:3101)
      at com.mojang.blaze3d.systems.RenderSystem.flipFrame(SourceFile:172)

      – Last reload –
      Details:
      Reload number: 1
      Reload reason: initial
      Finished: Yes
      Packs: Default, Programmer Art
      Stacktrace:
      at dvx.a(SourceFile:49)
      at dvp.c(SourceFile:2406)
      at dvp.e(SourceFile:747)
      at net.minecraft.client.main.Main.main(SourceFile:217)

      – System Details –
      Details:
      Minecraft Version: 1.17.1
      Minecraft Version ID: 1.17.1
      Operating System: Windows 7 (amd64) version 6.1
      Java Version: 16.0.1, Microsoft
      Java VM Version: OpenJDK 64-Bit Server VM (mixed mode), Microsoft
      Memory: 977509816 bytes (932 MiB) / 1744830464 bytes (1664 MiB) up to 2147483648 bytes (2048 MiB)
      CPUs: 4
      Processor Vendor: GenuineIntel
      Processor Name: Intel(R) Core(TM) i7-2617M CPU @ 1.50GHz
      Identifier: Intel64 Family 6 Model 42 Stepping 7
      Microarchitecture: Sandy Bridge (Client)
      Frequency (GHz): 1.50
      Number of physical packages: 1
      Number of physical CPUs: 2
      Number of logical CPUs: 4
      Graphics card #0 name: NVIDIA GeForce GT 540M
      Graphics card #0 vendor: NVIDIA (0x10de)
      Graphics card #0 VRAM (MB): 2048.00
      Graphics card #0 deviceId: 0x0df4
      Graphics card #0 versionInfo: DriverVersion=23.21.13.9135
      Memory slot #0 capacity (MB): 4096.00
      Memory slot #0 clockSpeed (GHz): 1.33
      Memory slot #0 type: Unknown
      Memory slot #1 capacity (MB): 4096.00
      Memory slot #1 clockSpeed (GHz): 1.33
      Memory slot #1 type: Unknown
      Virtual memory max (MB): 16277.86
      Virtual memory used (MB): 7456.61
      Swap memory total (MB): 8138.00
      Swap memory used (MB): 118.44
      JVM Flags: 9 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xss1M -Xmx2G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M
      Launched Version: 1.17.1
      Backend library: LWJGL version 3.2.2 build 10
      Backend API: GeForce GT 540M/PCIe/SSE2 GL version 3.2.0 NVIDIA 391.35, NVIDIA Corporation
      Window size: 854x480
      GL Caps: Using framebuffer using OpenGL 3.2
      GL debug messages:
      Using VBOs: Yes
      Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.
      Type: Integrated Server (map_client.txt)
      Graphics mode: fancy
      Resource Packs: vanilla, programer_art
      Current Language: English (US)
      CPU: 4x Intel(R) Core(TM) i7-2617M CPU @ 1.50GHz
      Player Count: 0 / 8; []
      Data Packs: vanilla

       

      This error only appears on newer versions of MC, older versions allow me to create single player worlds as well as join servers running older versions. Ive tried turning off firewall and nothing changed, any feedback will be much appreciated

            Unassigned Unassigned
            unknown_penguin thomas beebe
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              Created:
              Updated:
              Resolved: