Spring session redis ERR unknown command 'CONFIG'

部署线上服务启动报错

redis.clients.jedis.exceptions.JedisDataException: ERR unknown command 'CONFIG'

Redis CONFIG GET命令是用来读取运行Redis服务器的配置参数。并非所有的配置参数在Redis2.4支持，而Redis2.6可以读取使用此命令的服务器的整体配置。

之前开发环境的redis都是自己部署的，权限都很大，所以程序也没报什么异常。现在生产环境是由运维管理，redis也是运维提供的一个2.8。

根据错误提示，直接redis-cli连上redis去执行Config命令

10.xx:6379> CONFIG GET parameter 
(error) ERR unknown command 'CONFIG'

确定了没有放开权限，就只能看能否不用这个命令了。
发现是spring-session-redis需要使用Keyspace notifications这个功能。

在 Redis 的 2.8.0 版本之后，其推出了一个新的特性——键空间消息（Redis Keyspace Notifications）……

键空间通知，允许Redis客户端从“发布/订阅”通道中建立订阅关系，以便客户端能够在Redis中的数据因某种方式受到影响时收到相应事件。……

在GitHub上看到有issues spring-session #124

具体解决方案：

开启redis的Keyspace notifications功能,重启
```
notify-keyspace-events Ex 
```

关闭Spring-session中对CONFIG的操作

在xml里加上：

<util:constant static-field="org.springframework.session.data.redis.config.ConfigureRedisAction.NO_OP"/>

或者

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

注意：
如果采用XML配置的方式，很有可能需要引入 util标签

<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       
       xmlns:util="http://www.springframework.org/schema/util"
       
       xsi:schemaLocation="http://www.springframework.org/schema/beans
    http://www.springframework.org/schema/beans/spring-beans-4.1.xsd    
    http://www.springframework.org/schema/context
    http://www.springframework.org/schema/context/spring-context-4.1.xsd 
    http://www.springframework.org/schema/aop
    http://www.springframework.org/schema/aop/spring-aop-4.1.xsd  
    http://www.springframework.org/schema/mvc   
    http://www.springframework.org/schema/mvc/spring-mvc-4.1.xsd
    
    http://www.springframework.org/schema/util
    http://www.springframework.org/schema/util/spring-util-4.1.xsd
    
    ">

spring xml 有顺序要求，xmls:util在最后，xsi里也是。

验证 notify-keyspace-events

打开一个redis连接

10.xx.xx.xx:6379> psubscribe '__key*__:*'
Reading messages... (press Ctrl-C to quit)
1) "psubscribe"
2) "__key*__:*"
3) (integer) 1

在另一个redis连接，设置一个短时间过期的key

10.xx.xx.xx:6379> set ZHANG LONG px 20
OK

第一个连接则会收到事件消息

10.xx.xx.xx:6379> psubscribe '__key*__:*'
Reading messages... (press Ctrl-C to quit)
1) "psubscribe"
2) "__key*__:*"
3) (integer) 1
1) "pmessage"
2) "__key*__:*"
3) "__keyevent@0__:expired"
4) "ZHANG"

异常信息：

12-Sep-2017 21:28:17.592 SEVERE [localhost-startStop-1] org.apache.catalina.core.StandardContext.listenerStart Exception sending context initialized event to listener
 instance of class org.springframework.web.context.ContextLoaderListener
 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 java.lan
g.IllegalStateException: Unable to configure Redis to keyspace notifications. See http://docs.spring.io/spring-session/docs/current/reference/html5/#api-redisoperatio
nssessionrepository-sessiondestroyedevent
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1628)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:555)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:483)
        at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306)
        at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
        at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302)
        at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197)
        at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:761)
        at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:866)
        at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:542)
        at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:443)
        at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:325)
        at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:107)
        at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4754)
        at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5216)
        at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
        at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:752)
        at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:728)
        at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:734)
        at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:952)
        at org.apache.catalina.startup.HostConfig$DeployWar.run(HostConfig.java:1823)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
        at java.util.concurrent.FutureTask.run(FutureTask.java:266)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.IllegalStateException: Unable to configure Redis to keyspace notifications. See http://docs.spring.io/spring-session/docs/current/reference/html5/#api-redisoperationssessionrepository-sessiondestroyedevent
        at org.springframework.session.data.redis.config.ConfigureNotifyKeyspaceEventsAction.getNotifyOptions(ConfigureNotifyKeyspaceEventsAction.java:81)
        at org.springframework.session.data.redis.config.ConfigureNotifyKeyspaceEventsAction.configure(ConfigureNotifyKeyspaceEventsAction.java:55)
        at org.springframework.session.data.redis.config.annotation.web.http.RedisHttpSessionConfiguration$EnableRedisKeyspaceNotificationsInitializer.afterPropertiesSet(RedisHttpSessionConfiguration.java:251)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1687)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1624)
        ... 25 more
Caused by: org.springframework.dao.InvalidDataAccessApiUsageException: ERR unknown command 'CONFIG'; nested exception is redis.clients.jedis.exceptions.JedisDataException: ERR unknown command 'CONFIG'
        at org.springframework.data.redis.connection.jedis.JedisExceptionConverter.convert(JedisExceptionConverter.java:44)
        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:210)
        at org.springframework.data.redis.connection.jedis.JedisConnection.getConfig(JedisConnection.java:571)
        at org.springframework.session.data.redis.config.ConfigureNotifyKeyspaceEventsAction.getNotifyOptions(ConfigureNotifyKeyspaceEventsAction.java:74)
        ... 29 more
        Caused by: redis.clients.jedis.exceptions.JedisDataException: ERR unknown command 'CONFIG'
        at redis.clients.jedis.Protocol.processError(Protocol.java:117)
        at redis.clients.jedis.Protocol.process(Protocol.java:151)
        at redis.clients.jedis.Protocol.read(Protocol.java:205)
        at redis.clients.jedis.Connection.readProtocolWithCheckingBroken(Connection.java:297)
        at redis.clients.jedis.Connection.getBinaryMultiBulkReply(Connection.java:233)
        at redis.clients.jedis.Connection.getMultiBulkReply(Connection.java:226)
        at redis.clients.jedis.Jedis.configGet(Jedis.java:2578)
        at org.springframework.data.redis.connection.jedis.JedisConnection.getConfig(JedisConnection.java:569)
        ... 30 more

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Spring session redis ERR unknown command ‘CONFIG’

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