Searched on Google with the first line of a JAVA stack trace?

We can recommend more relevant solutions and speed up debugging when you paste your entire stack trace with the exception message. Try a sample exception.

Recommended solutions based on your search

Solutions on the web

via YouTrack by Unknown author, 2 years ago
via Stack Overflow by BullyWiiPlaza
, 1 year ago
via Stack Overflow by Adnan Umer
, 1 year ago
failed to create a child event loop
via GitHub by n59yl
, 2 years ago
failed to create a child event loop
java.lang.IllegalStateException: failed to create a child event loop at io.netty.util.concurrent.MultithreadEventExecutorGroup.<init>(MultithreadEventExecutorGroup.java:81) at io.netty.channel.MultithreadEventLoopGroup.<init>(MultithreadEventLoopGroup.java:50) at io.netty.channel.nio.NioEventLoopGroup.<init>(NioEventLoopGroup.java:72) at io.netty.channel.nio.NioEventLoopGroup.<init>(NioEventLoopGroup.java:58) at org.jetbrains.io.BuiltInServer.start(BuiltInServer.java:78) at com.intellij.idea.SocketLock$2.call(SocketLock.java:131) at com.intellij.idea.SocketLock$2.call(SocketLock.java:112) at com.intellij.idea.SocketLock.a(SocketLock.java:155) at com.intellij.idea.SocketLock.lock(SocketLock.java:112) at com.intellij.idea.StartupUtil.a(StartupUtil.java:263) at com.intellij.idea.StartupUtil.prepareAndStart(StartupUtil.java:101) at com.intellij.idea.MainImpl.start(MainImpl.java:40) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:497) at com.intellij.ide.plugins.PluginManager$2.run(PluginManager.java:90) at java.lang.Thread.run(Thread.java:745)Caused by: io.netty.channel.ChannelException: failed to open a new selector at io.netty.channel.nio.NioEventLoop.openSelector(NioEventLoop.java:127) at io.netty.channel.nio.NioEventLoop.<init>(NioEventLoop.java:119) at io.netty.channel.nio.NioEventLoopGroup.newChild(NioEventLoopGroup.java:97) at io.netty.channel.nio.NioEventLoopGroup.newChild(NioEventLoopGroup.java:31) at io.netty.util.concurrent.MultithreadEventExecutorGroup.<init>(MultithreadEventExecutorGroup.java:77) ... 17 moreCaused by: java.io.IOException: Unable to establish loopback connection at sun.nio.ch.PipeImpl$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:125) ... 21 moreCaused by: java.net.ConnectException: Connection timed out: connect at sun.nio.ch.Net.$$YJP$$connect0(Native Method) at sun.nio.ch.Net.connect0(Net.java) 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) ... 29 more