Ive been having this problem with minecraft where im connected to the internet, but it wont let me on servers and when i try to get on to one it says, java,lang,NullPointerExeptaction: group. then when i try to get on single player, every time, i get kicked off minecraft
What I thought was going to happen was that I would open up minecraft. see that I could play online, then have a funky good glory time. but no.
What ACTUALY happened was this, I got on, I see that it says play offline and I say to myself, must be a bug, I start to "Play Oflline" and try to get into a server and I am met with a big Error: java,lang,NullPointerExeptaction: group
Then I say well that's odd, so I try my singleplayer world and I get kicked of of minecraft, I try the same thing 4 times and each time it kicked me off.
Im Flustered.
Steps to Reproduce:
1. Has me offline, when im online
2. go to Server
3. Get error
Or on singleplayer Error
1.Get offline, even when your connected.
2. Go to singleplayer world
3. Get kicked off of minecraft...
Related issues
Comments

---- Minecraft Crash Report ----
// This doesn't make any sense!
Time: 11/11/16 5:33 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 md$1.a(SourceFile:61)
at md$1.b(SourceFile:58)
at ol.c(SourceFile:10)
at md.a(SourceFile:138)
at bcx.a(SourceFile:2158)
at bic.a(SourceFile:212)
at bft.a(SourceFile:346)
at bic.a(SourceFile:352)
at bft.k(SourceFile:409)
at bft.p(SourceFile:386)
at bcx.t(SourceFile:1586)
at bcx.av(SourceFile:968)
at bcx.a(SourceFile:396)
at net.minecraft.client.main.Main.main(SourceFile:124)
Caused by: io.netty.channel.ChannelException: failed to open a new selector
at io.netty.channel.nio.NioEventLoop.openSelector(NioEventLoop.java:128)
at io.netty.channel.nio.NioEventLoop.<init>(NioEventLoop.java:120)
at io.netty.channel.nio.NioEventLoopGroup.newChild(NioEventLoopGroup.java:87)
at io.netty.util.concurrent.MultithreadEventExecutorGroup.<init>(MultithreadEventExecutorGroup.java:64)
... 17 more
Caused by: java.io.IOException: Unable to establish loopback connection
at sun.nio.ch.PipeImpl$Initializer.run(PipeImpl.java:101)
at sun.nio.ch.PipeImpl$Initializer.run(PipeImpl.java:68)
at java.security.AccessController.doPrivileged(Native Method)
at sun.nio.ch.PipeImpl.<init>(PipeImpl.java:170)
at sun.nio.ch.SelectorProviderImpl.openPipe(SelectorProviderImpl.java:50)
at java.nio.channels.Pipe.open(Pipe.java:155)
at sun.nio.ch.WindowsSelectorImpl.<init>(WindowsSelectorImpl.java:127)
at sun.nio.ch.WindowsSelectorProvider.openSelector(WindowsSelectorProvider.java:44)
at io.netty.channel.nio.NioEventLoop.openSelector(NioEventLoop.java:126)
... 20 more
Caused by: java.net.SocketException: Invalid argument: connect
at sun.nio.ch.Net.connect0(Native Method)
at sun.nio.ch.Net.connect(Net.java:457)
at sun.nio.ch.Net.connect(Net.java:449)
at sun.nio.ch.SocketChannelImpl.connect(SocketChannelImpl.java:647)
at java.nio.channels.SocketChannel.open(SocketChannel.java:189)
at sun.nio.ch.PipeImpl$Initializer$LoopbackConnector.run(PipeImpl.java:130)
at sun.nio.ch.PipeImpl$Initializer.run(PipeImpl.java:83)
... 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 md$1.a(SourceFile:61)
at md$1.b(SourceFile:58)
at ol.c(SourceFile:10)
at md.a(SourceFile:138)
at bcx.a(SourceFile:2158)
at bic.a(SourceFile:212)
at bft.a(SourceFile:346)
at bic.a(SourceFile:352)
at bft.k(SourceFile:409)
at bft.p(SourceFile:386)
-- Affected screen --
Details:
Screen name: bfr
Stacktrace:
at bcx.t(SourceFile:1586)
at bcx.av(SourceFile:968)
at bcx.a(SourceFile:396)
at net.minecraft.client.main.Main.main(SourceFile:124)
-- System Details --
Details:
Minecraft Version: 1.10.2
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: 130874880 bytes (124 MB) / 255066112 bytes (243 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: 1.10.2
LWJGL: 2.9.4
OpenGL: AMD Radeon HD 6870M GL version 4.2.11932 Compatibility Profile Context, 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) i7-2760QM CPU @ 2.40GHz
Caused by an antivirus software. See MC-34749.

But I Don't have Those Antivirus Software...
So what else can I do?

From MC-34749:
Please visit the #minecrafthelp channel for further support.
Please attach the crash report (.minecraft/crash-reports/crash-<DATE>-client.txt) here.