一次故障Redis command timed out； nested exception is io.lettuce.core.RedisCommandTimeoutException:

异常信息如下：

2021-09-27 16:06:15.562 INFO [http-nio-7001-exec-52]com.***.web.config.GlobalExceptionHandler.printLog:300 -Method[Method[invoke:-1]]错误码:global_exception_warn_web_log,错误信息:Redis command timed out; nested exception is io.lettuce.core.RedisCommandTimeoutException: Command timed out after 2 second(s)-->Redis command timed out; nested exception is io.lettuce.core.RedisCommandTimeoutException: Command timed out after 2 second(s)
com.cfc.common.utils.TranFailException: Redis command timed out; nested exception is io.lettuce.core.RedisCommandTimeoutException: Command timed out after 2 second(s)-->Redis command timed out; nested exception is io.lettuce.core.RedisCommandTimeoutException: Command timed out after 2 second(s)
	at com.***.web.config.GlobalExceptionHandler.jsonErrorHandler(GlobalExceptionHandler.java:47)
	at org.springframework.web.servlet.mvc.method.annotation.ExceptionHandlerExceptionResolver.doResolveHandlerMethodException(ExceptionHandlerExceptionResolver.java:408)
	at org.springframework.web.servlet.handler.AbstractHandlerMethodExceptionResolver.doResolveException(AbstractHandlerMethodExceptionResolver.java:61)
	at org.springframework.web.servlet.handler.AbstractHandlerExceptionResolver.resolveException(AbstractHandlerExceptionResolver.java:140)
	at org.springframework.web.servlet.handler.HandlerExceptionResolverComposite.resolveException(HandlerExceptionResolverComposite.java:79)
	at org.springframework.web.servlet.DispatcherServlet.processHandlerException(DispatcherServlet.java:1298)
Caused by: org.springframework.dao.QueryTimeoutException: Redis command timed out; nested exception is io.lettuce.core.RedisCommandTimeoutException: Command timed out after 2 second(s)
	at org.springframework.data.redis.connection.lettuce.LettuceExceptionConverter.convert(LettuceExceptionConverter.java:70)
	at org.springframework.data.redis.connection.lettuce.LettuceExceptionConverter.convert(LettuceExceptionConverter.java:41)
	at org.springframework.data.redis.PassThroughExceptionTranslationStrategy.translate(PassThroughExceptionTranslationStrategy.java:44)
	at org.springframework.data.redis.FallbackExceptionTranslationStrategy.translate(FallbackExceptionTranslationStrategy.java:42)
	at org.springframework.data.redis.connection.lettuce.LettuceConnection.convertLettuceAccessException(LettuceConnection.java:268)
	at org.springframework.data.redis.connection.lettuce.LettuceStringCommands.convertLettuceAccessException(LettuceStringCommands.java:799)
Caused by: io.lettuce.core.RedisCommandTimeoutException: Command timed out after 2 second(s)
	at io.lettuce.core.ExceptionFactory.createTimeoutException(ExceptionFactory.java:51)

pom配置如下，左边是之前的，右边是修改后的：

 用的springboot自带的redis，底层集成了lettuce，

以lettuce驱动连接redis的过程当中，会出现连接断开的情况，导致无法新增成功，超过一定时间还没有正常，就会出现连接超时的情况；

修改后有待验证！

 参考贴：Springboot2.x集成lettuce连接redis集群报超时异常Command timed out after 6 second(s) - 朱季谦 - 博客园