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报错如下: ERROR org.springframework.dao.QueryTimeoutException: Redis command timed out; nested exception is io.lettuce.core.RedisCommandTimeoutException: Command timed out after 500 millisecond(s) at org...
报错如下:
- ERROR org.springframework.dao.QueryTimeoutException: Redis command timed out; nested exception is io.lettuce.core.RedisCommandTimeoutException: Command timed out after 500 millisecond(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.LettuceListCommands.convertLettuceAccessException(LettuceListCommands.java:490)
- at org.springframework.data.redis.connection.lettuce.LettuceListCommands.lLen(LettuceListCommands.java:159)
- at org.springframework.data.redis.connection.DefaultedRedisConnection.lLen(DefaultedRedisConnection.java:465)
- at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
- at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
- at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
- at java.lang.reflect.Method.invoke(Method.java:498)
- ****
- Caused by: io.lettuce.core.RedisCommandTimeoutException: Command timed out after 500 millisecond(s)
- at io.lettuce.core.ExceptionFactory.createTimeoutException(ExceptionFactory.java:51)
- at io.lettuce.core.LettuceFutures.awaitOrCancel(LettuceFutures.java:114)
- at io.lettuce.core.FutureSyncInvocationHandler.handleInvocation(FutureSyncInvocationHandler.java:69)
- at io.lettuce.core.internal.AbstractInvocationHandler.invoke(AbstractInvocationHandler.java:80)
- at com.sun.proxy.$Proxy196.llen(Unknown Source)
- at org.springframework.data.redis.connection.lettuce.LettuceListCommands.lLen(LettuceListCommands.java:157)
- ... 134 more
原因分析:这个情况是我在将SpringBoot从1.X升级到2.X的时候产生的问题,所以大致可以猜到是版本问题。
解决办法:
- redis:
- port: 6379
- jedis:
- pool:
- max-active: 50
- max-wait: 5000
- max-idle: 50
- min-idle: 0
- timeout: 500
- host: 47.100.21.110
这种方法无效,解决不了这个问题,我从0改到500还是报错。但是网上绝大多数都是这种方式,实际上我刚更改过来的时候有效过一阵,之后就又不行了。
- <dependency>
- <groupId>org.springframework.boot</groupId>
- <artifactId>spring-boot-starter-data-redis</artifactId>
- </dependency>
在SpringBoot 1.X版本的jar包依赖中,点击进去依赖项如下:
- <dependencies>
- <dependency>
- <groupId>org.springframework.boot</groupId>
- <artifactId>spring-boot-starter</artifactId>
- </dependency>
- <dependency>
- <groupId>org.springframework.data</groupId>
- <artifactId>spring-data-redis</artifactId>
- </dependency>
- <dependency>
- <groupId>redis.clients</groupId>
- <artifactId>jedis</artifactId>
- </dependency>
- </dependencies>
升级到SpringBoot 2.X版本之后依赖如下:
- <dependencies>
- <dependency>
- <groupId>org.springframework.boot</groupId>
- <artifactId>spring-boot-starter</artifactId>
- <version>2.1.2.RELEASE</version>
- <scope>compile</scope>
- </dependency>
- <dependency>
- <groupId>org.springframework.data</groupId>
- <artifactId>spring-data-redis</artifactId>
- <version>2.1.4.RELEASE</version>
- <scope>compile</scope>
- <exclusions>
- <exclusion>
- <artifactId>jcl-over-slf4j</artifactId>
- <groupId>org.slf4j</groupId>
- </exclusion>
- </exclusions>
- </dependency>
- <dependency>
- <groupId>io.lettuce</groupId>
- <artifactId>lettuce-core</artifactId>
- <version>5.1.3.RELEASE</version>
- <scope>compile</scope>
- </dependency>
- </dependencies>
可以看到变化是从jedis依赖变成了lettuce-core依赖,而上面的报错io.lettuce.core.RedisCommandTimeoutException
也是lettuce-core的异常,所以我的解决方式是先将依赖换回jedis:
- <dependency>
- <groupId>org.springframework.boot</groupId>
- <artifactId>spring-boot-starter-data-redis</artifactId>
- <exclusions>
- <exclusion>
- <groupId>io.lettuce</groupId>
- <artifactId>lettuce-core</artifactId>
- </exclusion>
- </exclusions>
- </dependency>
- <dependency>
- <groupId>redis.clients</groupId>
- <artifactId>jedis</artifactId>
- </dependency>
如上,配置文件不变,Redis连接成功,不再报错。
因为上文是我在版本升级的过程中遇到的,所以当时为了稳定还是继续使用的jedis连接池,但是实际上升级之后应该转向lettuce连接池,毕竟lettuce更好。
修改依赖:
- <dependency>
- <groupId>org.springframework.boot</groupId>
- <artifactId>spring-boot-starter-data-redis</artifactId>
- </dependency>
- <!-- 如果使用Lettuce作为连接池,需要引入commons-pool2包,否则会报错bean注入失败 -->
- <dependency>
- <groupId>org.apache.commons</groupId>
- <artifactId>commons-pool2</artifactId>
- </dependency>
修改配置文件
- spring:
- redis:
- port: 6379
- lettuce:
- pool:
- max-active: 500
- max-wait: 500
- max-idle: 500
- min-idle: 0
- timeout: 500
- host: 100.10.10.10
- password: password
- @Configuration
- @ConditionalOnClass(RedisOperations.class)
- @EnableConfigurationProperties(RedisProperties.class)
- @Import({
- LettuceConnectionConfiguration.class, JedisConnectionConfiguration.class })
- public class RedisAutoConfiguration {
-
首先是加载顺序。
同时我在@ConditionalOnClass(RedisClient.class)
和@ConditionalOnClass({ GenericObjectPool.class, JedisConnection.class, Jedis.class })
类里面打断点,发现仅RedisClient
执行了,这让我明白为啥LettuceConnectionConfiguration
配置生效,但是我没明白RedisClient
为啥执行。。。。项目刚启动就进来这里,再上一层我实在没找到,希望哪位研究到这里可以给个反馈。
我想要抛出LettuceConnectionConfiguration
配置时失效,有异常信息。
此文仅做记录,尚未分析原因,后续补充。
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