美好的一天，从bug结束

在这里插入图片描述

异常如下

我用的阿里云的redis，想给项目加个通知模块，谁知道突然开始报这个异常，最恶心的是同一个项目，我在公司里运行没问题，在家里就是不行，搞得我一开始就没考虑是代码的问题

org.springframework.data.redis.RedisConnectionFailureException: Unable to connect to Redis; nested exception is io.lettuce.core.RedisConnectionException: Unable to connect to r-bp1wug0sfb8o276u3tpd.tairpena.rds.aliyuncs.com:6379
	at org.springframework.data.redis.connection.lettuce.LettuceConnectionFactory$ExceptionTranslatingConnectionProvider.translateException(LettuceConnectionFactory.java:1689)
	at org.springframework.data.redis.connection.lettuce.LettuceConnectionFactory$ExceptionTranslatingConnectionProvider.getConnection(LettuceConnectionFactory.java:1597)
	at org.springframework.data.redis.connection.lettuce.LettuceConnectionFactory$SharedConnection.getNativeConnection(LettuceConnectionFactory.java:1383)
	at org.springframework.data.redis.connection.lettuce.LettuceConnectionFactory$SharedConnection.getConnection(LettuceConnectionFactory.java:1366)
	at org.springframework.data.redis.connection.lettuce.LettuceConnectionFactory.getSharedConnection(LettuceConnectionFactory.java:1093)
	at org.springframework.data.redis.connection.lettuce.LettuceConnectionFactory.getConnection(LettuceConnectionFactory.java:421)
	at org.springframework.data.redis.core.RedisConnectionUtils.fetchConnection(RedisConnectionUtils.java:193)
	at org.springframework.data.redis.core.RedisConnectionUtils.doGetConnection(RedisConnectionUtils.java:144)
	at org.springframework.data.redis.core.RedisConnectionUtils.getConnection(RedisConnectionUtils.java:105)
	at org.springframework.data.redis.core.RedisTemplate.execute(RedisTemplate.java:210)
	at org.springframework.data.redis.core.RedisTemplate.execute(RedisTemplate.java:190)
	at org.springframework.data.redis.core.AbstractOperations.execute(AbstractOperations.java:97)
	at org.springframework.data.redis.core.DefaultValueOperations.set(DefaultValueOperations.java:305)
	at com.cxks.study.utils.RedisUtil.set(RedisUtil.java:85)
	at com.cxks.study.security.filter.JwtLoginFilter.attemptAuthentication(JwtLoginFilter.java:103)
	at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:223)
	at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:213)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:336)
	at org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:103)
	at org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:89)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:336)
	at org.springframework.web.filter.CorsFilter.doFilterInternal(CorsFilter.java:91)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:336)
	at org.springframework.security.web.header.HeaderWriterFilter.doHeadersAfter(HeaderWriterFilter.java:90)
	at org.springframework.security.web.header.HeaderWriterFilter.doFilterInternal(HeaderWriterFilter.java:75)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:336)
	at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:110)
	at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:80)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:336)
	at org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter.doFilterInternal(WebAsyncManagerIntegrationFilter.java:55)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:336)
	at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:211)
	at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:183)
	at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:358)
	at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:271)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
	at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
	at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
	at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:197)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97)
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:540)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:135)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:357)
	at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:382)
	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)
	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:895)
	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1722)
	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
	at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191)
	at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659)
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
	at java.lang.Thread.run(Thread.java:748)
Caused by: io.lettuce.core.RedisConnectionException: Unable to connect to r-bp1wug0sfb8o276u3tpd.tairpena.rds.aliyuncs.com:6379
	at io.lettuce.core.RedisConnectionException.create(RedisConnectionException.java:78)
	at io.lettuce.core.RedisConnectionException.create(RedisConnectionException.java:56)
	at io.lettuce.core.AbstractRedisClient.getConnection(AbstractRedisClient.java:330)
	at io.lettuce.core.RedisClient.connect(RedisClient.java:216)
	at org.springframework.data.redis.connection.lettuce.StandaloneConnectionProvider.lambda$getConnection$1(StandaloneConnectionProvider.java:115)
	at java.util.Optional.orElseGet(Optional.java:267)
	at org.springframework.data.redis.connection.lettuce.StandaloneConnectionProvider.getConnection(StandaloneConnectionProvider.java:115)
	at org.springframework.data.redis.connection.lettuce.LettuceConnectionFactory$ExceptionTranslatingConnectionProvider.getConnection(LettuceConnectionFactory.java:1595)
	... 66 more
Caused by: java.net.UnknownHostException: failed to resolve 'r-bp1wug0sfb8o276u3tpd.tairpena.rds.aliyuncs.com' after 2 queries 
	at io.netty.resolver.dns.DnsResolveContext.finishResolve(DnsResolveContext.java:1046)
	at io.netty.resolver.dns.DnsResolveContext.tryToFinishResolve(DnsResolveContext.java:999)
	at io.netty.resolver.dns.DnsResolveContext.query(DnsResolveContext.java:417)
	at io.netty.resolver.dns.DnsResolveContext.access$600(DnsResolveContext.java:65)
	at io.netty.resolver.dns.DnsResolveContext$2.operationComplete(DnsResolveContext.java:466)
	at io.netty.util.concurrent.DefaultPromise.notifyListener0(DefaultPromise.java:578)
	at io.netty.util.concurrent.DefaultPromise.notifyListeners0(DefaultPromise.java:571)
	at io.netty.util.concurrent.DefaultPromise.notifyListenersNow(DefaultPromise.java:550)
	at io.netty.util.concurrent.DefaultPromise.notifyListeners(DefaultPromise.java:491)
	at io.netty.util.concurrent.DefaultPromise.setValue0(DefaultPromise.java:616)
	at io.netty.util.concurrent.DefaultPromise.setFailure0(DefaultPromise.java:609)
	at io.netty.util.concurrent.DefaultPromise.tryFailure(DefaultPromise.java:117)
	at io.netty.resolver.dns.DnsQueryContext.tryFailure(DnsQueryContext.java:224)
	at io.netty.resolver.dns.DnsQueryContext$4.run(DnsQueryContext.java:176)
	at io.netty.util.concurrent.PromiseTask.runTask(PromiseTask.java:98)
	at io.netty.util.concurrent.ScheduledFutureTask.run(ScheduledFutureTask.java:170)
	at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:164)
	at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:469)
	at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:500)
	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)
	... 1 more
Caused by: io.netty.resolver.dns.DnsNameResolverTimeoutException: [/114.114.114.114:53] query via UDP timed out after 5000 milliseconds (no stack trace available)

原因

经过多次排查，我怀疑是netty依赖的问题，网上搜了搜，说是
由于我引入了spring-boot-starter-data-redis的依赖

<!-- 引入redis连接-->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-redis</artifactId>
    </dependency>

而spring-boot-starter-data-redis又引用了

<dependency>
      <groupId>io.lettuce</groupId>
      <artifactId>lettuce-core</artifactId>
      <version>6.1.5.RELEASE</version>
      <scope>compile</scope>
    </dependency>

再点进去，就会发现lettuce-core里面又引入了很多io.netty的依赖
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解决办法

估计是spring-boot-starter-data-redis里面的依赖和netty-all里面的依赖版本冲突了，尝试了网上的所谓降低netty-all的版本，没啥用,既然netty-all不能用就先把netty-all去掉，再缺啥补啥喽，由于前面spring-boot-starter-data-redis已经默认引入了一部分依赖，最后发现 io.netty.handler.codec.http 相关的爆红了
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导入相关依赖

 <!--     netty相关依赖
        注意！！！
        由于spring-boot-starter-data-redis的依赖lettuce-core又引用了netty相关的依赖
        故这里不能使用netty-all，会有依赖冲突，建议按需引入-->
        <dependency>
            <groupId>io.netty</groupId>
            <artifactId>netty-codec-http</artifactId>
            <version>4.1.70.Final</version>
        </dependency>

问题解决！

# redis # 缓存 # 数据库
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