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Samebug tips

  1. ,
    Expert tip

    A few things cause this exception:
    1) Check if you have all jars and if they're in the correct path.
    2) Your classpath might be broken, you can define it in the command line with java -cp yourClassPath or at your IDE if you're using one.

  2. ,

    you can change your scala version to 2.11.11

Solutions on the web

java.lang.NoClassDefFoundError: io/netty/buffer/ByteBufUtil$HexUtil at io.netty.buffer.ByteBufUtil.hexDump(ByteBufUtil.java:123) at io.netty.channel.DefaultChannelId.asShortText(DefaultChannelId.java:240) at io.netty.channel.AbstractChannel.toString(AbstractChannel.java:385) at java.lang.String.valueOf(String.java:2994) at java.lang.StringBuilder.append(StringBuilder.java:131) at io.netty.bootstrap.ServerBootstrap$ServerBootstrapAcceptor.forceClose(ServerBootstrap.java:260) at io.netty.bootstrap.ServerBootstrap$ServerBootstrapAcceptor.channelRead(ServerBootstrap.java:254) at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348) at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:334) at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:326) at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1320) at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348) at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:334) at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:905) at io.netty.channel.nio.AbstractNioMessageChannel$NioMessageUnsafe.read(AbstractNioMessageChannel.java:93) at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:563) at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:504) at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:418) at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:385) at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:742) at java.lang.Thread.run(Thread.java:745)Caused by: java.lang.ClassNotFoundException: io.netty.buffer.ByteBufUtil$HexUtil at java.net.URLClassLoader.findClass(URLClassLoader.java:381) at java.lang.ClassLoader.loadClass(ClassLoader.java:424) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331) at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ... 21 more