java.lang.IllegalStateException: failed to create a child event loop

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java.lang.IllegalStateException: failed to create a child event loop
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$Initializer.run(PipeImpl.java:83)
at sun.nio.ch.PipeImpl$Initializer.run(PipeImpl.java:68)
at java.security.AccessController.doPrivileged(Native Method)
at sun.nio.ch.PipeImpl.(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.(WindowsSelectorImpl.java:127)
at sun.nio.ch.WindowsSelectorProvider.openSelector(WindowsSelectorProvider.java:44)
at io.netty.channel.nio.NioEventLoop.openSelector(NioEventLoop.java:126)
at io.netty.channel.nio.NioEventLoop.(NioEventLoop.java:120)
at io.netty.channel.nio.NioEventLoopGroup.newChild(NioEventLoopGroup.java:87)
at io.netty.util.concurrent.MultithreadEventExecutorGroup.(MultithreadEventExecutorGroup.java:64)
at io.netty.channel.MultithreadEventLoopGroup.(MultithreadEventLoopGroup.java:49)
at io.netty.channel.nio.NioEventLoopGroup.(NioEventLoopGroup.java:61)
at io.netty.channel.nio.NioEventLoopGroup.(NioEventLoopGroup.java:52)
at undefined.lm$1.a(SourceFile:44)
at undefined.lm$1.b(SourceFile:41)
at undefined.np.c(SourceFile:10)
at undefined.lm.a(SourceFile:121)
at undefined.avf.a(SourceFile:1941)
at undefined.axc.a(SourceFile:210)
at undefined.axv.a(SourceFile:350)
at undefined.axc.a(SourceFile:350)
at undefined.axv.k(SourceFile:413)
at undefined.axv.p(SourceFile:390)
at undefined.avf.s(SourceFile:1497)
at undefined.avf.av(SourceFile:888)
at undefined.avf.a(SourceFile:325)

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