Uploaded image for project: 'Minecraft: Java Edition'
  1. Minecraft: Java Edition
  2. MC-120022

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

XMLWordPrintable

    • Icon: Bug Bug
    • Resolution: Duplicate
    • None
    • Minecraft 1.12.1
    • None
    • OS:Windows 7
      Java:1.8.0_131
      Launcher: Minecraft Launcher 1.6.11 (bootstrap 100)
      Minecraft: 1.9 and above
    • Unconfirmed

      I attempt to open a world or join a server on Minecraft 1.9 to Latest Release, and get the error java.lang.NullPointerException: group when joining a server, and get this crash report when i try to load a single player world

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

      Time: 8/7/17 9:36 AM
      Description: Updating screen events

      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:58)
      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 ox$1.a(SourceFile:61)
      at ox$1.b(SourceFile:58)
      at rf.c(SourceFile:10)
      at ox.a(SourceFile:152)
      at bhz.a(SourceFile:2209)
      at boj.e(SourceFile:229)
      at boj.a(SourceFile:182)
      at boi.a(SourceFile:82)
      at bli.a(SourceFile:334)
      at boi.a(SourceFile:116)
      at bli.k(SourceFile:397)
      at boi.k(SourceFile:49)
      at bli.q(SourceFile:374)
      at bhz.t(SourceFile:1625)
      at bhz.az(SourceFile:1000)
      at bhz.a(SourceFile:419)
      at net.minecraft.client.main.Main.main(SourceFile:123)
      at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
      at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
      at java.lang.reflect.Method.invoke(Method.java:483)
      at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
      at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
      Caused by: io.netty.channel.ChannelException: failed to open a new selector
      at io.netty.channel.nio.NioEventLoop.openSelector(NioEventLoop.java:157)
      at io.netty.channel.nio.NioEventLoop.<init>(NioEventLoop.java:149)
      at io.netty.channel.nio.NioEventLoopGroup.newChild(NioEventLoopGroup.java:127)
      at io.netty.channel.nio.NioEventLoopGroup.newChild(NioEventLoopGroup.java:36)
      at io.netty.util.concurrent.MultithreadEventExecutorGroup.<init>(MultithreadEventExecutorGroup.java:84)
      ... 29 more
      Caused by: java.io.IOException: Unable to establish loopback connection
      at sun.nio.ch.PipeImpl$Initializer.run(PipeImpl.java:101)
      at sun.nio.ch.PipeImpl$Initializer.run(PipeImpl.java:68)
      at java.security.AccessController.doPrivileged(Native Method)
      at sun.nio.ch.PipeImpl.<init>(PipeImpl.java:170)
      at sun.nio.ch.SelectorProviderImpl.openPipe(SelectorProviderImpl.java:50)
      at java.nio.channels.Pipe.open(Pipe.java:155)
      at sun.nio.ch.WindowsSelectorImpl.<init>(WindowsSelectorImpl.java:127)
      at sun.nio.ch.WindowsSelectorProvider.openSelector(WindowsSelectorProvider.java:44)
      at io.netty.channel.nio.NioEventLoop.openSelector(NioEventLoop.java:155)
      ... 33 more
      Caused by: java.net.SocketException: Invalid argument: connect
      at sun.nio.ch.Net.connect0(Native Method)
      at sun.nio.ch.Net.connect(Net.java:457)
      at sun.nio.ch.Net.connect(Net.java:449)
      at sun.nio.ch.SocketChannelImpl.connect(SocketChannelImpl.java:647)
      at java.nio.channels.SocketChannel.open(SocketChannel.java:189)
      at sun.nio.ch.PipeImpl$Initializer$LoopbackConnector.run(PipeImpl.java:130)
      at sun.nio.ch.PipeImpl$Initializer.run(PipeImpl.java:83)
      ... 41 more

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

      – Head –
      Thread: Client 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:58)
      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 ox$1.a(SourceFile:61)
      at ox$1.b(SourceFile:58)
      at rf.c(SourceFile:10)
      at ox.a(SourceFile:152)
      at bhz.a(SourceFile:2209)
      at boj.e(SourceFile:229)
      at boj.a(SourceFile:182)
      at boi.a(SourceFile:82)
      at bli.a(SourceFile:334)
      at boi.a(SourceFile:116)
      at bli.k(SourceFile:397)
      at boi.k(SourceFile:49)
      at bli.q(SourceFile:374)

      – Affected screen –
      Details:
      Screen name: blg
      Stacktrace:
      at bhz.t(SourceFile:1625)
      at bhz.az(SourceFile:1000)
      at bhz.a(SourceFile:419)
      at net.minecraft.client.main.Main.main(SourceFile:123)
      at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
      at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
      at java.lang.reflect.Method.invoke(Method.java:483)
      at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
      at net.minecraft.launchwrapper.Launch.main(Launch.java:28)

      – System Details –
      Details:
      Minecraft Version: 1.12
      Operating System: Windows 7 (amd64) version 6.1
      Java Version: 1.8.0_25, Oracle Corporation
      Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
      Memory: 110526568 bytes (105 MB) / 270778368 bytes (258 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: 2, allocated: 20, tallocated: 86
      Launched Version: 1.12-OptiFine_HD_U_C4
      LWJGL: 2.9.4
      OpenGL: AMD Radeon HD 5800 Series GL version 4.5.13399 Compatibility Profile Context 15.200.1062.1004, 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: Yes
      Is Modded: Very likely; Jar signature invalidated
      Type: Client (map_client.txt)
      Resource Packs:
      Current Language: English (US)
      Profiler Position: N/A (disabled)
      CPU: 8x Intel(R) Core(TM) i7 CPU 920 @ 2.67GHz
      OptiFine Version: OptiFine_1.12_HD_U_C4
      Render Distance Chunks: 16
      Mipmaps: 4
      Anisotropic Filtering: 1
      Antialiasing: 0
      Multitexture: false
      Shaders: null
      OpenGlVersion: 4.5.13399 Compatibility Profile Context 15.200.1062.1004
      OpenGlRenderer: AMD Radeon HD 5800 Series
      OpenGlVendor: ATI Technologies Inc.
      CpuCount: 8

      Non-Optifine Crash Report:

      ---- Minecraft Crash Report ----
      // This is a token for 1 free hug. Redeem at your nearest Mojangsta: HUG~

      Time: 8/7/17 10:16 AM
      Description: Updating screen events

      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:58)
      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 oz$1.a(SourceFile:61)
      at oz$1.b(SourceFile:58)
      at rh.c(SourceFile:10)
      at oz.a(SourceFile:152)
      at bib.a(SourceFile:2209)
      at boi.a(SourceFile:212)
      at blk.a(SourceFile:337)
      at boi.a(SourceFile:352)
      at blk.k(SourceFile:400)
      at blk.q(SourceFile:377)
      at bib.t(SourceFile:1625)
      at bib.az(SourceFile:1000)
      at bib.a(SourceFile:419)
      at net.minecraft.client.main.Main.main(SourceFile:123)
      Caused by: io.netty.channel.ChannelException: failed to open a new selector
      at io.netty.channel.nio.NioEventLoop.openSelector(NioEventLoop.java:157)
      at io.netty.channel.nio.NioEventLoop.<init>(NioEventLoop.java:149)
      at io.netty.channel.nio.NioEventLoopGroup.newChild(NioEventLoopGroup.java:127)
      at io.netty.channel.nio.NioEventLoopGroup.newChild(NioEventLoopGroup.java:36)
      at io.netty.util.concurrent.MultithreadEventExecutorGroup.<init>(MultithreadEventExecutorGroup.java:84)
      ... 20 more
      Caused by: java.io.IOException: Unable to establish loopback connection
      at sun.nio.ch.PipeImpl$Initializer.run(PipeImpl.java:101)
      at sun.nio.ch.PipeImpl$Initializer.run(PipeImpl.java:68)
      at java.security.AccessController.doPrivileged(Native Method)
      at sun.nio.ch.PipeImpl.<init>(PipeImpl.java:170)
      at sun.nio.ch.SelectorProviderImpl.openPipe(SelectorProviderImpl.java:50)
      at java.nio.channels.Pipe.open(Pipe.java:155)
      at sun.nio.ch.WindowsSelectorImpl.<init>(WindowsSelectorImpl.java:127)
      at sun.nio.ch.WindowsSelectorProvider.openSelector(WindowsSelectorProvider.java:44)
      at io.netty.channel.nio.NioEventLoop.openSelector(NioEventLoop.java:155)
      ... 24 more
      Caused by: java.net.SocketException: Invalid argument: connect
      at sun.nio.ch.Net.connect0(Native Method)
      at sun.nio.ch.Net.connect(Net.java:457)
      at sun.nio.ch.Net.connect(Net.java:449)
      at sun.nio.ch.SocketChannelImpl.connect(SocketChannelImpl.java:647)
      at java.nio.channels.SocketChannel.open(SocketChannel.java:189)
      at sun.nio.ch.PipeImpl$Initializer$LoopbackConnector.run(PipeImpl.java:130)
      at sun.nio.ch.PipeImpl$Initializer.run(PipeImpl.java:83)
      ... 32 more

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

      – Head –
      Thread: Client 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:58)
      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 oz$1.a(SourceFile:61)
      at oz$1.b(SourceFile:58)
      at rh.c(SourceFile:10)
      at oz.a(SourceFile:152)
      at bib.a(SourceFile:2209)
      at boi.a(SourceFile:212)
      at blk.a(SourceFile:337)
      at boi.a(SourceFile:352)
      at blk.k(SourceFile:400)
      at blk.q(SourceFile:377)

      – Affected screen –
      Details:
      Screen name: bli
      Stacktrace:
      at bib.t(SourceFile:1625)
      at bib.az(SourceFile:1000)
      at bib.a(SourceFile:419)
      at net.minecraft.client.main.Main.main(SourceFile:123)

      – System Details –
      Details:
      Minecraft Version: 1.12.1
      Operating System: Windows 7 (amd64) version 6.1
      Java Version: 1.8.0_25, Oracle Corporation
      Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
      Memory: 103013808 bytes (98 MB) / 315285504 bytes (300 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: 13, tallocated: 95
      Launched Version: 1.12.1
      LWJGL: 2.9.4
      OpenGL: AMD Radeon HD 5800 Series GL version 4.5.13399 Compatibility Profile Context 15.200.1062.1004, 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: Yes
      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)
      CPU: 8x Intel(R) Core(TM) i7 CPU 920 @ 2.67GHz

      And I have tried reinstalling, and shut off Windows Defender (Firewall Program) and every other fix there is on this site, not a single one has worked.

            Unassigned Unassigned
            JakeFrostburn Jake Frost
            Votes:
            0 Vote for this issue
            Watchers:
            3 Start watching this issue

              Created:
              Updated:
              Resolved: