解决Springboot Redis command timed out 问题
Springboot 接入Redis后发现隔一段时间连接会超时 command timed out,看了网上很多文章,都说设置超时时间,但其实不管你设置多久都还是会超时,后面想想应该跟超时时间没关系,感觉像是连接通道关闭了。
后来了解到,原来springboot2.x之后,默认使用的client是lettuce,而不是jedis了,关于二者的区别,大家可以自行百度,先贴错误信息
org.springframework.dao.QueryTimeoutException: Redis command timed out; nested exception is io.lettuce.core.RedisCommandTimeoutException: Command timed out after 5 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:273) at org.springframework.data.redis.connection.lettuce.LettuceStringCommands.convertLettuceAccessException(LettuceStringCommands.java:799) at org.springframework.data.redis.connection.lettuce.LettuceStringCommands.get(LettuceStringCommands.java:68) at org.springframework.data.redis.connection.DefaultedRedisConnection.get(DefaultedRedisConnection.java:266) at org.springframework.data.redis.core.DefaultValueOperations$1.inRedis(DefaultValueOperations.java:57) at org.springframework.data.redis.core.AbstractOperations$ValueDeserializingRedisCallback.doInRedis(AbstractOperations.java:60) at org.springframework.data.redis.core.RedisTemplate.execute(RedisTemplate.java:228) at org.springframework.data.redis.core.RedisTemplate.execute(RedisTemplate.java:188) at org.springframework.data.redis.core.AbstractOperations.execute(AbstractOperations.java:96) at org.springframework.data.redis.core.DefaultValueOperations.get(DefaultValueOperations.java:53)
大概了解到是连接池的问题,lettuce的连接池会自动断开,找了很多解决方案都没用,最后还是使用jedis作为redis的client,解决了问题,只需要在pom.xml文件中做如下配置即可
<dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-redis</artifactId> <exclusions> <!-- 过滤lettuce,使用jedis作为redis客户端 --> <exclusion> <groupId>io.lettuce</groupId> <artifactId>lettuce-core</artifactId> </exclusion> </exclusions> </dependency> <dependency> <groupId>redis.clients</groupId> <artifactId>jedis</artifactId> </dependency> <dependency> <groupId>org.apache.commons</groupId> <artifactId>commons-pool2</artifactId> </dependency>