Error creating bean with name 'enableRedisKeyspaceNotificationsInitializer'

@Configuration
public class HttpSessionConfig {
	@Bean
	public static ConfigureRedisAction configureRedisAction() {
	    return ConfigureRedisAction.NO_OP;
	}
}

spring 官方链接：

http://docs.spring.io/spring-session/docs/current/reference/html5/#api-redisoperationssessionrepository-sessiondestroyedevent

spring-session中间件需要依赖redis2.8.0以上版本，并且需要开启：notify-keyspace-events  gxE；

如果spring-session使用的是redis集群环境，且redis集群环境没有开启Keyspace notifications功能，则应用启动时会抛出如下异常：

[org.springframework.web.context.support.XmlWebApplicationContext][refresh]Exception encountered during context initialization - cancelling refresh attempt

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'enableRedisKeyspaceNotificationsInitializer' defined in class path resource [org/springframework/session/data/redis/config/annotation/web/http/RedisHttpSessionConfiguration.class]:
Invocation of init method failed; nested exception is org.springframework.data.redis.RedisConnectionFailureException: Unexpected end of stream.; nested exception is redis.clients.jedis.exceptions.JedisConnectionException: Unexpected end of stream.

    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1574)

    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:539)

    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:476)

    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:303)

    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)

    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:299)

    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:194)

    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:755)

    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:757)

    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:480)

    at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:434)

    at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:306)

    at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:106)

    at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4206)

    at org.apache.catalina.core.StandardContext.start(StandardContext.java:4705)

    at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:799)

    at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:779)

    at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:601)

    at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:943)

    at org.apache.catalina.startup.HostConfig.deployWARs(HostConfig.java:778)

    at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:504)

    at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1317)

    at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:324)

    at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:142)

    at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1065)

    at org.apache.catalina.core.StandardHost.start(StandardHost.java:840)

    at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1057)

    at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:463)

    at org.apache.catalina.core.StandardService.start(StandardService.java:525)

    at org.apache.catalina.core.StandardServer.start(StandardServer.java:754)

    at org.apache.catalina.startup.Catalina.start(Catalina.java:595)

    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)

    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)

    at java.lang.reflect.Method.invoke(Method.java:597)

    at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289)

    at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)

Caused by: org.springframework.data.redis.RedisConnectionFailureException: Unexpected end of stream.; nested exception is redis.clients.jedis.exceptions.JedisConnectionException: Unexpected end of stream.

    at org.springframework.data.redis.connection.jedis.JedisExceptionConverter.convert(JedisExceptionConverter.java:47)

    at org.springframework.data.redis.connection.jedis.JedisExceptionConverter.convert(JedisExceptionConverter.java:36)

    at org.springframework.data.redis.PassThroughExceptionTranslationStrategy.translate(PassThroughExceptionTranslationStrategy.java:37)

    at org.springframework.data.redis.FallbackExceptionTranslationStrategy.translate(FallbackExceptionTranslationStrategy.java:37)

    at org.springframework.data.redis.connection.jedis.JedisConnection.convertJedisAccessException(JedisConnection.java:196)

    at org.springframework.data.redis.connection.jedis.JedisConnection.getConfig(JedisConnection.java:557)

    at org.springframework.session.data.redis.config.ConfigureNotifyKeyspaceEventsAction.getNotifyOptions(ConfigureNotifyKeyspaceEventsAction.java:69)

    at org.springframework.session.data.redis.config.ConfigureNotifyKeyspaceEventsAction.configure(ConfigureNotifyKeyspaceEventsAction.java:50)

    at org.springframework.session.data.redis.config.annotation.web.http.RedisHttpSessionConfiguration$EnableRedisKeyspaceNotificationsInitializer.afterPropertiesSet(RedisHttpSessionConfiguration.java:167)

代码异常具体位置：org.springframework.session.data.redis.config.ConfigureNotifyKeyspaceEventsAction.java第50行

异常信息第75行：

Unable to configure Redis to keyspace notifications. See http://docs.spring.io/spring-session/docs/current/reference/html5/#api-redisoperationssessionrepository-sessiondestroyedevent

官方文档中说Keyspace notifications功能默认是关闭的（默认地，Keyspace 时间通知功能是禁用的，因为它或多或少会使用一些CPU的资源），

我们需要打开它。打开的方法也很简单，配置属性：notify-keyspace-events。