Can someone help me?
I cant go in any servers or world's i just get this issue:
Minecraft Crash Report ---- // Surprise! Haha. Well, this is awkward. Time: 3/20/21 11:06 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 aax.f(SourceFile:56) at aax$$Lambda$4142/300992832.get(Unknown Source) at afi.a(SourceFile:16) at aax.a(SourceFile:138) at djz.a(SourceFile:1891) at djz.a(SourceFile:1748) at dsm$a.e(SourceFile:407) at dsm$a.a(SourceFile:317) at dsm$a.a(SourceFile:259) at dlf.a(SourceFile:345) at dmh.a(SourceFile:27) at dka.b(SourceFile:92) at dka$$Lambda$3003/1485647504.run(Unknown Source) at dot.a(SourceFile:435) at dka.a(SourceFile:92) at dka.c(SourceFile:162) at dka$$Lambda$3002/1447261655.run(Unknown Source) at aob.execute(SourceFile:94) at dka.b(SourceFile:162) at dka$$Lambda$2352/14366507.invoke(Unknown Source) at org.lwjgl.glfw.GLFWMouseButtonCallbackI.callback(GLFWMouseButtonCallbackI.java:36) at org.lwjgl.system.JNI.invokeV(Native Method) at org.lwjgl.glfw.GLFW.glfwWaitEventsTimeout(GLFW.java:3174) at com.mojang.blaze3d.systems.RenderSystem.limitDisplayFPS(SourceFile:127) at djz.e(SourceFile:1071) at djz.e(SourceFile:681) at net.minecraft.client.main.Main.main(SourceFile:215) Caused by: io.netty.channel.ChannelException: failed to open a new selector at io.netty.channel.nio.NioEventLoop.openSelector(NioEventLoop.java:177) at io.netty.channel.nio.NioEventLoop.<init>(NioEventLoop.java:151) at io.netty.channel.nio.NioEventLoopGroup.newChild(NioEventLoopGroup.java:127) at io.netty.channel.nio.NioEventLoopGroup.newChild(NioEventLoopGroup.java:36) at io.netty.util.concurrent.MultithreadEventExecutorGroup.<init>(MultithreadEventExecutorGroup.java:84) ... 33 more Caused by: java.io.IOException: Unable to establish loopback connection at sun.nio.ch.PipeImpl$Initializer.run(PipeImpl.java:101) at sun.nio.ch.PipeImpl$Initializer.run(PipeImpl.java:68) at java.security.AccessController.doPrivileged(Native Method) at sun.nio.ch.PipeImpl.<init>(PipeImpl.java:170) at sun.nio.ch.SelectorProviderImpl.openPipe(SelectorProviderImpl.java:50) at java.nio.channels.Pipe.open(Pipe.java:155) at sun.nio.ch.WindowsSelectorImpl.<init>(WindowsSelectorImpl.java:127) at sun.nio.ch.WindowsSelectorProvider.openSelector(WindowsSelectorProvider.java:44) at io.netty.channel.nio.NioEventLoop.openSelector(NioEventLoop.java:175) ... 37 more Caused by: java.net.SocketException: No buffer space available (maximum connections reached?): connect at sun.nio.ch.Net.connect0(Native Method) at sun.nio.ch.Net.connect(Net.java:458) at sun.nio.ch.Net.connect(Net.java:450) at sun.nio.ch.SocketChannelImpl.connect(SocketChannelImpl.java:648) at java.nio.channels.SocketChannel.open(SocketChannel.java:189) at sun.nio.ch.PipeImpl$Initializer$LoopbackConnector.run(PipeImpl.java:130) at sun.nio.ch.PipeImpl$Initializer.run(PipeImpl.java:83) ... 45 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 aax.f(SourceFile:56) at aax$$Lambda$4142/300992832.get(Unknown Source) at afi.a(SourceFile:16) at aax.a(SourceFile:138) at djz.a(SourceFile:1891) at djz.a(SourceFile:1748) at dsm$a.e(SourceFile:407) at dsm$a.a(SourceFile:317) at dsm$a.a(SourceFile:259) at dlf.a(SourceFile:345) at dmh.a(SourceFile:27) at dka.b(SourceFile:92) at dka$$Lambda$3003/1485647504.run(Unknown Source) – Affected screen – Details: Screen name: dsj Stacktrace: at dot.a(SourceFile:435) at dka.a(SourceFile:92) at dka.c(SourceFile:162) at dka$$Lambda$3002/1447261655.run(Unknown Source) at aob.execute(SourceFile:94) at dka.b(SourceFile:162) at dka$$Lambda$2352/14366507.invoke(Unknown Source) at org.lwjgl.glfw.GLFWMouseButtonCallbackI.callback(GLFWMouseButtonCallbackI.java:36) at org.lwjgl.system.JNI.invokeV(Native Method) at org.lwjgl.glfw.GLFW.glfwWaitEventsTimeout(GLFW.java:3174) at com.mojang.blaze3d.systems.RenderSystem.limitDisplayFPS(SourceFile:127) at djz.e(SourceFile:1071) at djz.e(SourceFile:681) at net.minecraft.client.main.Main.main(SourceFile:215) – System Details – Details: Minecraft Version: 1.16.5 Minecraft Version ID: 1.16.5 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: 561062128 bytes (535 MB) / 1912602624 bytes (1824 MB) up to 2147483648 bytes (2048 MB) CPUs: 8 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: 1.16.5 Backend library: LWJGL version 3.2.2 build 10 Backend API: GeForce GTX 1060 6GB/PCIe/SSE2 GL version 4.6.0 NVIDIA 456.71, NVIDIA Corporation GL Caps: Using framebuffer using OpenGL 3.0 Using VBOs: Yes Is Modded: Probably not. Jar signature remains and client brand is untouched. Type: Client (map_client.txt) Graphics mode: fancy Resource Packs: vanilla Current Language: English (US) CPU: 8x Intel(R) Core(TM) i7-7700K CPU @ 4.20GHz
Related issues
Comments

This ticket actually appears to be a duplicate of MC-34749, which was later marked as Invalid. Please see the moderator note attached to the duplicated link to potentially fix the issue.
This report is incomplete just attaching the crash log isn't enough information. We need reproduction steps and similar things to that.