Netty报错

问题：因客户反馈Netty版本低，影响性能，建议提升。于是，我将所有Netty版本从4.1.82.Final到4.1.114.Final后，报下面的错误，java.lang.NoClassDefFoundError: io/netty/util/Recycler$EnhancedHandle，提示一个类没找

java.lang.NoClassDefFoundError: io/netty/util/Recycler$EnhancedHandleat io.netty.buffer.PooledByteBuf.<init>(PooledByteBuf.java:47) ~[netty-buffer-4.1.114.Final.jar:4.1.114.Final]at io.netty.buffer.PooledUnsafeDirectByteBuf.<init>(PooledUnsafeDirectByteBuf.java:47) ~[netty-buffer-4.1.114.Final.jar:4.1.114.Final]at io.netty.buffer.PooledUnsafeDirectByteBuf.<init>(PooledUnsafeDirectByteBuf.java:29) ~[netty-buffer-4.1.114.Final.jar:4.1.114.Final]at io.netty.buffer.PooledUnsafeDirectByteBuf$1.newObject(PooledUnsafeDirectByteBuf.java:34) ~[netty-buffer-4.1.114.Final.jar:4.1.114.Final]at io.netty.buffer.PooledUnsafeDirectByteBuf$1.newObject(PooledUnsafeDirectByteBuf.java:31) ~[netty-buffer-4.1.114.Final.jar:4.1.114.Final]at io.netty.util.internal.ObjectPool$RecyclerObjectPool$1.newObject(ObjectPool.java:77) ~[netty-common-4.1.82.Final.jar:4.1.82.Final]at io.netty.util.Recycler.get(Recycler.java:173) ~[netty-common-4.1.82.Final.jar:4.1.82.Final]at io.netty.util.internal.ObjectPool$RecyclerObjectPool.get(ObjectPool.java:84) ~[netty-common-4.1.82.Final.jar:4.1.82.Final]at io.netty.buffer.PooledUnsafeDirectByteBuf.newInstance(PooledUnsafeDirectByteBuf.java:39) ~[netty-buffer-4.1.114.Final.jar:4.1.114.Final]at io.netty.buffer.PoolArena$DirectArena.newByteBuf(PoolArena.java:733) ~[netty-buffer-4.1.114.Final.jar:4.1.114.Final]at io.netty.buffer.PoolArena.allocate(PoolArena.java:126) ~[netty-buffer-4.1.114.Final.jar:4.1.114.Final]at io.netty.buffer.PooledByteBufAllocator.newDirectBuffer(PooledByteBufAllocator.java:403) ~[netty-buffer-4.1.114.Final.jar:4.1.114.Final]at io.netty.buffer.AbstractByteBufAllocator.directBuffer(AbstractByteBufAllocator.java:188) ~[netty-buffer-4.1.114.Final.jar:4.1.114.Final]at io.netty.buffer.AbstractByteBufAllocator.directBuffer(AbstractByteBufAllocator.java:179) ~[netty-buffer-4.1.114.Final.jar:4.1.114.Final]at io.netty.buffer.AbstractByteBufAllocator.ioBuffer(AbstractByteBufAllocator.java:140) ~[netty-buffer-4.1.114.Final.jar:4.1.114.Final]at io.netty.channel.DefaultMaxMessagesRecvByteBufAllocator$MaxMessageHandle.allocate(DefaultMaxMessagesRecvByteBufAllocator.java:120) ~[netty-transport-4.1.82.Final.jar:4.1.82.Final]at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:150) [netty-transport-4.1.82.Final.jar:4.1.82.Final]at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:788) [netty-transport-4.1.82.Final.jar:4.1.82.Final]at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:724) [netty-transport-4.1.82.Final.jar:4.1.82.Final]at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:650) [netty-transport-4.1.82.Final.jar:4.1.82.Final]at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:562) [netty-transport-4.1.82.Final.jar:4.1.82.Final]at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:997) [netty-common-4.1.82.Final.jar:4.1.82.Final]at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74) [netty-common-4.1.82.Final.jar:4.1.82.Final]at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30) [netty-common-4.1.82.Final.jar:4.1.82.Final]at java.lang.Thread.run(Thread.java:748) [?:1.8.0_311]

解决：

排查下来，是有个模块引入的Netty依赖没有升上来，还是旧的4.1.82.Final版本，改成同版本的4.1.114.Final就OK了。

参考：https://github.com/redis/lettuce/issues/2525