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  1. Minecraft: Java Edition
  2. MC-135718

Cannot create or join worlds, and cannot connect to any servers (CRASH)

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    • Icon: Bug Bug
    • Resolution: Duplicate
    • None
    • Minecraft 1.13
    • None
    • Minecraft 1.12.2, Minecraft 1.11.2
    • Unconfirmed

      When attempting to connect to any servers:

      https://gyazo.com/233e5949655d4727875b3e8667d8fcef

      Couldn't connect to server
      java.lang.NullPointerException: group
      	at io.netty.bootstrap.AbstractBootstrap.group(AbstractBootstrap.java:84)
      	at gw.a(SourceFile:276)
      	at bkr$1.run(SourceFile:58)
      

      When attempting to join a singleplayer world:

      Reported exception thrown!
      f: Updating screen events
      	at bib.t(SourceFile:1635)
      	at bib.az(SourceFile:1000)
      	at bib.a(SourceFile:419)
      	at net.minecraft.client.main.Main.main(SourceFile:123)
      Caused by: 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$1.b(SourceFile:58)
      	at rh.c(SourceFile:10)
      	at oz.a(SourceFile:152)
      	at bib.a(SourceFile:2209)
      	at bol.e(SourceFile:229)
      	at bol.a(SourceFile:182)
      	at bol.a(SourceFile:154)
      	at bjm.a(SourceFile:41)
      	at bok.a(SourceFile:117)
      	at blk.k(SourceFile:400)
      	at bok.k(SourceFile:49)
      	at blk.q(SourceFile:377)
      	at bib.t(SourceFile:1625)
      	... 3 more
      Caused by: io.netty.channel.ChannelException: failed to open a new selector
      	at io.netty.channel.nio.NioEventLoop.openSelector(NioEventLoop.java:157)
      	at io.netty.channel.nio.NioEventLoop.<init>(NioEventLoop.java:149)
      	at io.netty.channel.nio.NioEventLoopGroup.newChild(NioEventLoopGroup.java:127)
      	at io.netty.channel.nio.NioEventLoopGroup.newChild(NioEventLoopGroup.java:36)
      	at io.netty.util.concurrent.MultithreadEventExecutorGroup.<init>(MultithreadEventExecutorGroup.java:84)
      	... 23 more
      Caused by: java.io.IOException: Unable to establish loopback connection
      	at sun.nio.ch.PipeImpl$Initializer.run(PipeImpl.java:101)
      	at sun.nio.ch.PipeImpl$Initializer.run(PipeImpl.java:68)
      	at java.security.AccessController.doPrivileged(Native Method)
      	at sun.nio.ch.PipeImpl.<init>(PipeImpl.java:170)
      	at sun.nio.ch.SelectorProviderImpl.openPipe(SelectorProviderImpl.java:50)
      	at java.nio.channels.Pipe.open(Pipe.java:155)
      	at sun.nio.ch.WindowsSelectorImpl.<init>(WindowsSelectorImpl.java:127)
      	at sun.nio.ch.WindowsSelectorProvider.openSelector(WindowsSelectorProvider.java:44)
      	at io.netty.channel.nio.NioEventLoop.openSelector(NioEventLoop.java:155)
      	... 27 more
      Caused by: java.net.BindException: Cannot assign requested address: connect
      	at sun.nio.ch.Net.connect0(Native Method)
      	at sun.nio.ch.Net.connect(Net.java:458)
      	at sun.nio.ch.Net.connect(Net.java:450)
      	at sun.nio.ch.SocketChannelImpl.connect(SocketChannelImpl.java:648)
      	at java.nio.channels.SocketChannel.open(SocketChannel.java:189)
      	at sun.nio.ch.PipeImpl$Initializer$LoopbackConnector.run(PipeImpl.java:130)
      	at sun.nio.ch.PipeImpl$Initializer.run(PipeImpl.java:83)
      	... 35 more
      15:07:08launcher
      ---- Minecraft Crash Report ----
      // Ouch. That hurt :(
      
      Time: 8/7/18 3:07 PM
      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$1.b(SourceFile:58)
      	at rh.c(SourceFile:10)
      	at oz.a(SourceFile:152)
      	at bib.a(SourceFile:2209)
      	at bol.e(SourceFile:229)
      	at bol.a(SourceFile:182)
      	at bol.a(SourceFile:154)
      	at bjm.a(SourceFile:41)
      	at bok.a(SourceFile:117)
      	at blk.k(SourceFile:400)
      	at bok.k(SourceFile:49)
      	at blk.q(SourceFile:377)
      	at bib.t(SourceFile:1625)
      	at bib.az(SourceFile:1000)
      	at bib.a(SourceFile:419)
      	at net.minecraft.client.main.Main.main(SourceFile:123)
      Caused by: io.netty.channel.ChannelException: failed to open a new selector
      	at io.netty.channel.nio.NioEventLoop.openSelector(NioEventLoop.java:157)
      	at io.netty.channel.nio.NioEventLoop.<init>(NioEventLoop.java:149)
      	at io.netty.channel.nio.NioEventLoopGroup.newChild(NioEventLoopGroup.java:127)
      	at io.netty.channel.nio.NioEventLoopGroup.newChild(NioEventLoopGroup.java:36)
      	at io.netty.util.concurrent.MultithreadEventExecutorGroup.<init>(MultithreadEventExecutorGroup.java:84)
      	... 23 more
      Caused by: java.io.IOException: Unable to establish loopback connection
      	at sun.nio.ch.PipeImpl$Initializer.run(PipeImpl.java:101)
      	at sun.nio.ch.PipeImpl$Initializer.run(PipeImpl.java:68)
      	at java.security.AccessController.doPrivileged(Native Method)
      	at sun.nio.ch.PipeImpl.<init>(PipeImpl.java:170)
      	at sun.nio.ch.SelectorProviderImpl.openPipe(SelectorProviderImpl.java:50)
      	at java.nio.channels.Pipe.open(Pipe.java:155)
      	at sun.nio.ch.WindowsSelectorImpl.<init>(WindowsSelectorImpl.java:127)
      	at sun.nio.ch.WindowsSelectorProvider.openSelector(WindowsSelectorProvider.java:44)
      	at io.netty.channel.nio.NioEventLoop.openSelector(NioEventLoop.java:155)
      	... 27 more
      Caused by: java.net.BindException: Cannot assign requested address: connect
      	at sun.nio.ch.Net.connect0(Native Method)
      	at sun.nio.ch.Net.connect(Net.java:458)
      	at sun.nio.ch.Net.connect(Net.java:450)
      	at sun.nio.ch.SocketChannelImpl.connect(SocketChannelImpl.java:648)
      	at java.nio.channels.SocketChannel.open(SocketChannel.java:189)
      	at sun.nio.ch.PipeImpl$Initializer$LoopbackConnector.run(PipeImpl.java:130)
      	at sun.nio.ch.PipeImpl$Initializer.run(PipeImpl.java:83)
      	... 35 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 bol.e(SourceFile:229)
      	at bol.a(SourceFile:182)
      	at bol.a(SourceFile:154)
      	at bjm.a(SourceFile:41)
      	at bok.a(SourceFile:117)
      	at blk.k(SourceFile:400)
      	at bok.k(SourceFile:49)
      	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: 1.12.2
      	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: 97436672 bytes (92 MB) / 218103808 bytes (208 MB) up to 1073741824 bytes (1024 MB)
      	JVM Flags: 8 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=16M
      	IntCache: cache: 0, tcache: 0, allocated: 13, tallocated: 95
      	Launched Version: 1.12.2
      	LWJGL: 2.9.4
      	OpenGL: GeForce GTX 1080/PCIe/SSE2 GL version 4.6.0 NVIDIA 398.82, NVIDIA Corporation
      	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) i7-7700HQ CPU @ 2.80GHz
      #@!@# Game crashed! Crash report saved to: #@!@# C:\Users\ghast\AppData\Roaming\.minecraft\crash-reports\crash-2018-08-07_15.07.07-client.txt
      AL lib: (EE) alc_cleanup: 1 device not closed
      

            Unassigned Unassigned
            TerminalSin Thibault Juneja
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              Created:
              Updated:
              Resolved: