升级版本：从 3.10.6 升级到3.18.0
报错: java.io.IOException: Unsupported protocol version 252
java.io.IOException: Unsupported protocol version 252 at org.jboss.marshalling.river.RiverUnmarshaller.start(RiverUnmarshaller.java:1375) at org.redisson.codec.MarshallingCodec.lambda$new$0(MarshallingCodec.java:145) at org.redisson.client.handler.CommandDecoder.decode(CommandDecoder.java:383) at org.redisson.client.handler.CommandDecoder.decodeCommand(CommandDecoder.java:198) at org.redisson.client.handler.CommandDecoder.decode(CommandDecoder.java:137) at org.redisson.client.handler.CommandDecoder.decode(CommandDecoder.java:113) at io.netty.handler.codec.ByteToMessageDecoder.decodeRemovalReentryProtection(ByteToMessageDecoder.java:507) at io.netty.handler.codec.ReplayingDecoder.callDecode(ReplayingDecoder.java:366) at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:276) at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357) at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410) at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919) at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:166) at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:719) at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:655) at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:581) at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:493) at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:986) at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74) at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30) at java.lang.Thread.run(Thread.java:750)
问题原因：
版本: 3.10.6 默认使用了FstCodec 编码
3.18.0 默认编码使用：MarshallingCodec,官方已经明确不再建议使用 FstCodec编码，并且移除了Fst相关依赖
若希望继续兼容老的编码方式，进行以下步骤：
<dependency> <groupId>de.ruedigermoeller</groupId> <artifactId>fst</artifactId> <version>2.57</version> </dependency>
增加自定义编码
@Bean public RedissonAutoConfigurationCustomizer redissonAutoConfigurationCustomizer(){ return config -> { config.setCodec(new FstCodec()); }; }