java.lang.NoClassDefFoundError

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  • java.lang.NoClassDefFoundError: Could not initialize class io.netty.util.concurrent.DefaultPromise at io.netty.util.concurrent.MultithreadEventExecutorGroup.<init>(MultithreadEventExecutorGroup.java:35) 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 io.netty.channel.nio.NioEventLoopGroup.<init>(NioEventLoopGroup.java:44) at io.netty.channel.nio.NioEventLoopGroup.<init>(NioEventLoopGroup.java:36)
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