Minecraft Forums

Hey guys, every time I open a world the game crashes. It's not random, and the game's not modded.

I've already tried reinstalling minecraft and deleting the .minecraft folder and folders inside it.

It's always the same error too.

---- Minecraft Crash Report ----

Time: 12/10/16 2:45 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 mh$1.a(SourceFile:61)
at mh$1.b(SourceFile:58)
at op.c(SourceFile:10)
at mh.a(SourceFile:152)
at beq.a(SourceFile:2159)
at bjw.a(SourceFile:212)
at bhm.a(SourceFile:341)
at bjw.a(SourceFile:352)
at bhm.k(SourceFile:404)
at bhm.p(SourceFile:381)
at beq.t(SourceFile:1583)
at beq.av(SourceFile:967)
at beq.a(SourceFile:395)
at net.minecraft.client.main.Main.main(SourceFile:124)
Caused by: io.netty.channel.ChannelException: failed to open a new selector
at io.netty.channel.nio.NioEventLoop.openSelector(NioEventLoop.java:128)
at io.netty.channel.nio.NioEventLoop.<init>(NioEventLoop.java:120)
at io.netty.channel.nio.NioEventLoopGroup.newChild(NioEventLoopGroup.java:87)
at io.netty.util.concurrent.MultithreadEventExecutorGroup.<init>(MultithreadEventExecutorGroup.java:64)
... 17 more
Caused by: java.io.IOException: Unable to establish loopback connection
at sun.nio.ch.PipeImpl$Initializer.run(PipeImpl.java:101)
at sun.nio.ch.PipeImpl$Initializer.run(PipeImpl.java:68)
at java.security.AccessController.doPrivileged(Native Method)
at sun.nio.ch.PipeImpl.<init>(PipeImpl.java:170)
at sun.nio.ch.SelectorProviderImpl.openPipe(SelectorProviderImpl.java:50)
at java.nio.channels.Pipe.open(Pipe.java:155)
at sun.nio.ch.WindowsSelectorImpl.<init>(WindowsSelectorImpl.java:127)
at sun.nio.ch.WindowsSelectorProvider.openSelector(WindowsSelectorProvider.java:44)
at io.netty.channel.nio.NioEventLoop.openSelector(NioEventLoop.java:126)
... 20 more
Caused by: java.net.SocketException: Permission denied: connect
at sun.nio.ch.Net.connect0(Native Method)
at sun.nio.ch.Net.connect(Net.java:457)
at sun.nio.ch.Net.connect(Net.java:449)
at sun.nio.ch.SocketChannelImpl.connect(SocketChannelImpl.java:647)
at java.nio.channels.SocketChannel.open(SocketChannel.java:189)
at sun.nio.ch.PipeImpl$Initializer$LoopbackConnector.run(PipeImpl.java:130)
at sun.nio.ch.PipeImpl$Initializer.run(PipeImpl.java:83)
... 28 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: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 mh$1.a(SourceFile:61)
at mh$1.b(SourceFile:58)
at op.c(SourceFile:10)
at mh.a(SourceFile:152)
at beq.a(SourceFile:2159)
at bjw.a(SourceFile:212)
at bhm.a(SourceFile:341)
at bjw.a(SourceFile:352)
at bhm.k(SourceFile:404)
at bhm.p(SourceFile:381)

-- Affected screen --
Details:
Screen name: bhk
Stacktrace:
at beq.t(SourceFile:1583)
at beq.av(SourceFile:967)
at beq.a(SourceFile:395)
at net.minecraft.client.main.Main.main(SourceFile:124)

-- System Details --
Details:
Minecraft Version: 1.11
Operating System: Windows 8.1 (amd64) version 6.3
Java Version: 1.8.0_25, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 85562680 bytes (81 MB) / 228503552 bytes (217 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: 1.11
LWJGL: 2.9.4
OpenGL: Intel(R) HD Graphics 3000 GL version 3.1.0 - Build 9.17.10.4229, Intel
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: 4x Intel(R) Core(TM) i3-2370M CPU @ 2.40GHz

Help! I can't figure this out.

norton i ran it as admin and same thing happened

btw, the last thing it says is "loading world building terran"

Here's an update:

I run another java program called DrJava used for a programming class I am taking, and I can't run my programs in it.

It gives an error message:

JVM failed to start. Make sure a firewall is not blocking inter-process communication. See the console tab for details.

I tried turning norton off, but it didn't work.

actually, it's not norton, the guilty one is covenant eyes (my filtering software) 7.2.20. It was not letting java apps through.

Minecraft and drjava work fine with norton. **Solved**