Minecraft Forums

Server Error:(I Think This Error Only Appears Once,)"java.lang.IllegalStateException: failed to create a child event loop".

2nd Server Error:"java.lang.NullPointerException: group"

Single Player:

"---- Minecraft Crash Report ----
// Everything's going to plan. No, really, that was supposed to happen.
Time: 12/10/15 1:28 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$1.b(SourceFile:41)
at no.c(SourceFile:10)
at ll.a(SourceFile:121)
at ave.a(SourceFile:1942)
at axv.i(SourceFile:172)
at axv$a.a(SourceFile:224)
at awi.p(SourceFile:315)
at axv.k(SourceFile:82)
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$Initializer.run(Unknown Source)
at sun.nio.ch.PipeImpl$Initializer.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at sun.nio.ch.PipeImpl.<init>(Unknown Source)
at sun.nio.ch.SelectorProviderImpl.openPipe(Unknown Source)
at java.nio.channels.Pipe.open(Unknown Source)
at sun.nio.ch.WindowsSelectorImpl.<init>(Unknown Source)
at sun.nio.ch.WindowsSelectorProvider.openSelector(Unknown Source)
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(Unknown Source)
at sun.nio.ch.Net.connect(Unknown Source)
at sun.nio.ch.SocketChannelImpl.connect(Unknown Source)
at java.nio.channels.SocketChannel.open(Unknown Source)
at sun.nio.ch.PipeImpl$Initializer$LoopbackConnector.run(Unknown Source)
... 29 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$1.b(SourceFile:41)
at no.c(SourceFile:10)
at ll.a(SourceFile:121)
at ave.a(SourceFile:1942)
at axv.i(SourceFile:172)
at axv$a.a(SourceFile:224)
at awi.p(SourceFile:315)
at axv.k(SourceFile:82)
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 7 (x86) version 6.1
Java Version: 1.8.0_66, Oracle Corporation
Java VM Version: Java HotSpot(TM) Client VM (mixed mode), Oracle Corporation
Memory: 120280080 bytes (114 MB) / 323067904 bytes (308 MB) up to 523501568 bytes (499 MB)
JVM Flags: 6 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx512M -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M
IntCache: cache: 1, tcache: 1, allocated: 12, tallocated: 94
Launched Version: 1.8.8
LWJGL: 2.9.4
OpenGL: Intel(R) HD Graphics GL version 2.1.0 - Build 8.15.10.2622, Intel
GL Caps: Using GL 1.3 multitexturing.
Using GL 1.3 texture combiners.
Using framebuffer objects because ARB_framebuffer_object 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: No
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 CPU M 370 @ 2.40GHz"

Also,Some People Say It's McAfee,But,IDK If That's True or Not,So I Asked Here

Ok,thanks for the quick response!

I Had McAfee Pre-Installed With Windows 7 Starter(Long Story Short,Minecraft+Windows 10+"Bad Driver Card"=Reseting Laptop)XD,but,do i remove them both in "Uninstall or change a program"?Or somewhere else?XD(I know this is a dumb question)

To completely uninstall McAfee products, use this tool: http://us.mcafee.com/apps/supporttools/mcpr/mcpr.asp