Could not initialize class io.netty.channel.DefaultChannelId
生产环境上，两服务器，一个能够正常运行，一个就不行。
Caused by: java.lang.NoClassDefFoundError: Could not initialize class io.netty.channel.DefaultChannelId
at io.netty.channel.AbstractChannel.newId(AbstractChannel.java:101) ~[netty-transport-4.1.45.Final.jar:4.1.45.Final]
at io.netty.channel.AbstractChannel.<init>(AbstractChannel.java:73) ~[netty-transport-4.1.45.Final.jar:4.1.45.Final]
at io.netty.bootstrap.FailedChannel.<init>(FailedChannel.java:33) ~[netty-transport-4.1.45.Final.jar:4.1.45.Final]
at io.netty.bootstrap.AbstractBootstrap.initAndRegister(AbstractBootstrap.java:312) ~[netty-transport-4.1.45.Final.jar:4.1.45.Final]
at io.netty.bootstrap.Bootstrap.doResolveAndConnect(Bootstrap.java:155) ~[netty-transport-4.1.45.Final.jar:4.1.45.Final]
at io.netty.bootstrap.Bootstrap.connect(Bootstrap.java:139) ~[netty-transport-4.1.45.Final.jar:4.1.45.Final]
at io.lettuce.core.AbstractRedisClient.initializeChannelAsync0(AbstractRedisClient.java:313) ~[lettuce-core-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at io.lettuce.core.AbstractRedisClient.lambda$initializeChannelAsync$0(AbstractRedisClient.java:294) ~[lettuce-core-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at reactor.core.publisher.LambdaMonoSubscriber.onNext(LambdaMonoSubscriber.java:168) ~[reactor-core-3.3.2.RELEASE.jar:3.3.2.RELEASE]
at reactor.core.publisher.FluxPeekFuseable$PeekFuseableSubscriber.onNext(FluxPeekFuseable.java:203) ~[reactor-core-3.3.2.RELEASE.jar:3.3.2.RELEASE]
at reactor.core.publisher.MonoPeekTerminal$MonoTerminalPeekSubscriber.onNext(MonoPeekTerminal.java:173) ~[reactor-core-3.3.2.RELEASE.jar:3.3.2.RELEASE]
at reactor.core.publisher.FluxPeekFuseable$PeekConditionalSubscriber.onNext(FluxPeekFuseable.java:845) ~[reactor-core-3.3.2.RELEASE.jar:3.3.2.RELEASE]
at reactor.core.publisher.Operators$MonoSubscriber.complete(Operators.java:1637) ~[reactor-core-3.3.2.RELEASE.jar:3.3.2.RELEASE]
at reactor.core.publisher.MonoCallable.subscribe(MonoCallable.java:61) ~[reactor-core-3.3.2.RELEASE.jar:3.3.2.RELEASE]
at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:52) ~[reactor-core-3.3.2.RELEASE.jar:3.3.2.RELEASE]
at reactor.core.publisher.Mono.subscribe(Mono.java:4105) ~[reactor-core-3.3.2.RELEASE.jar:3.3.2.RELEASE]
at reactor.core.publisher.Mono.subscribeWith(Mono.java:4211) ~[reactor-core-3.3.2.RELEASE.jar:3.3.2.RELEASE]
at reactor.core.publisher.Mono.subscribe(Mono.java:4077) ~[reactor-core-3.3.2.RELEASE.jar:3.3.2.RELEASE]
at reactor.core.publisher.Mono.subscribe(Mono.java:4013) ~[reactor-core-3.3.2.RELEASE.jar:3.3.2.RELEASE]
at reactor.core.publisher.Mono.subscribe(Mono.java:3985) ~[reactor-core-3.3.2.RELEASE.jar:3.3.2.RELEASE]
at io.lettuce.core.AbstractRedisClient.initializeChannelAsync(AbstractRedisClient.java:289) ~[lettuce-core-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at io.lettuce.core.RedisClient.connectStatefulAsync(RedisClient.java:294) ~[lettuce-core-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at io.lettuce.core.RedisClient.connectStandaloneAsync(RedisClient.java:274) ~[lettuce-core-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at io.lettuce.core.RedisClient.connect(RedisClient.java:207) ~[lettuce-core-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.data.redis.connection.lettuce.StandaloneConnectionProvider.lambda$getConnection$1(StandaloneConnectionProvider.java:115) ~[spring-data-redis-2.2.13.RELEASE.jar:2.2.13.RELEASE]
at java.util.Optional.orElseGet(Optional.java:267) ~[?:1.8.0_151]
at org.springframework.data.redis.connection.lettuce.StandaloneConnectionProvider.getConnection(StandaloneConnectionProvider.java:115) ~[spring-data-redis-2.2.13.RELEASE.jar:2.2.13.RELEASE]
我以为有 jar 的版本冲突，然后反复查看，并没有发现版本冲突的 jar . tomcat 的配置也看过，并没有发现特别不同之处。
项目中用到了 rabbitmq、spring-data-redis、极光推送。
