java.lang.IllegalStateException: RedisConnectionFactory is required异常解决

一. 异常现象

我在SpringBoot中实现集群会话管理时，在对Spring Session与Redis进行整合的过程中，出现了如下异常：

Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sessionRepository' defined in class path resource [org/springframework/session/data/redis/config/annotation/web/http/RedisHttpSessionConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.session.data.redis.RedisIndexedSessionRepository]: Circular reference involving containing bean 'org.springframework.session.data.redis.config.annotation.web.http.RedisHttpSessionConfiguration' - consider declaring the factory method as static for independence from its containing instance. Factory method 'sessionRepository' threw exception; nested exception is java.lang.IllegalStateException: RedisConnectionFactory is required at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:656) ~[spring-beans-5.2.4.RELEASE.jar:5.2.4.RELEASE] at ..... Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.session.data.redis.RedisIndexedSessionRepository]: Circular reference involving containing bean 'org.springframework.session.data.redis.config.annotation.web.http.RedisHttpSessionConfiguration' - consider declaring the factory method as static for independence from its containing instance. Factory method 'sessionRepository' threw exception; ... 114 common frames omitted

Caused by: java.lang.IllegalStateException: RedisConnectionFactory is required at org.springframework.util.Assert.state(Assert.java:73) ~[spring-core-5.2.4.RELEASE.jar:5.2.4.RELEASE] at org.springframework.data.redis.core.RedisAccessor.afterPropertiesSet(RedisAccessor.java:38) ~[spring-data-redis-2.2.5.RELEASE.jar:2.2.5.RELEASE] at org.springframework.data.redis.core.RedisTemplate.afterPropertiesSet(RedisTemplate.java:127) ~[spring-data-redis-2.2.5.RELEASE.jar:2.2.5.RELEASE] at org.springframework.session.data.redis.config.annotation.web.http.RedisHttpSessionConfiguration.createRedisTemplate(RedisHttpSessionConfiguration.java:291) ~[spring-session-data-redis-2.2.1.RELEASE.jar:2.2.1.RELEASE] at org.springframework.session.data.redis.config.annotation.web.http.RedisHttpSessionConfiguration.sessionRepository(RedisHttpSessionConfiguration.java:120) ~[spring-session-data-redis-2.2.1.RELEASE.jar:2.2.1.RELEASE] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_192] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_192] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_192] at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_192] at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:154) ~[spring-beans-5.2.4.RELEASE.jar:5.2.4.RELEASE] ... 115 common frames omitted

最直接的异常就是 java.lang.IllegalStateException: RedisConnectionFactory is required！

根据提示可以看到，就是Redis连接工厂没有设置好，导致程序无法启动起来。

下面是我的原始代码：

@Configuration@EnableRedisHttpSessionpublic class HttpSessionConfig {/*** 创建Redis连接,默认是连接本地localhost:6379*/@Beanpublic RedisConnectionFactory connectionFactory(){return new JedisConnectionFactory();}/*** HttpSession的事件监听,改用Session提供的会话注册表.*/@Beanpublic HttpSessionEventPublisher httpSessionEventPublisher(){return new HttpSessionEventPublisher();}@Autowiredprivate FindByIndexNameSessionRepository<? extends Session> sessionRepository;/*** SpringSessionBackedSessionRegistry是Session为Spring Security提供的用于在集群环境中控制并发会话的注册表实现类*/@Beanpublic SpringSessionBackedSessionRegistry sessionRegistry(){return new SpringSessionBackedSessionRegistry<>(sessionRepository);}    }

从代码中可以看到，因为我要连接redis，所以是写了RedisConnectionFactory配置代码的！

二. 解决办法

后来经过分析，实际上在SpringSessionBackedSessionRegistry创建过程中，是不需要我们自己设置这个RedisConnectionFactory和HttpSessionEventPublisher代码的，所以解决办法也很简单，就是去掉RedisConnectionFactory和HttpSessionEventPublisher相关代码。

完善的代码如下：

@Configuration@EnableRedisHttpSessionpublic class HttpSessionConfig {@Autowiredprivate FindByIndexNameSessionRepository<? extends Session> sessionRepository;/*** SpringSessionBackedSessionRegistry是Session为Spring Security提供的用于在集群环境中控制并发会话的注册表实现类*/@Beanpublic SpringSessionBackedSessionRegistry sessionRegistry(){return new SpringSessionBackedSessionRegistry<>(sessionRepository);}//解决Caused by: java.lang.IllegalStateException: RedisConnectionFactory is required异常:,必须移除如下代码!!!/*** 创建Redis连接,默认是连接本地localhost:6379*///    @Bean//    public RedisConnectionFactory connectionFactory(){//        return new JedisConnectionFactory();//    }/*** HttpSession的事件监听,改用Session提供的会话注册表.*///    @Bean//    public HttpSessionEventPublisher httpSessionEventPublisher(){////        return new HttpSessionEventPublisher();//    }}

最后就实现了Session的集群管理。

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RedisConnectionFactory is required异常解决

java.lang.IllegalStateException: RedisConnectionFactory is required异常解决

一. 异常现象

二. 解决办法

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