本文主要跟大家分享了关于Spring Boot报错：No session repository could be auto-configured, check your configuration的解决方法，下面话不多说，来一起看看详细的介绍：

一、环境介绍

JDK 1.8 spring-Boot 1.5.1.RELEASE, STS IDE

二、问题的提出

创建了一个非常简约的Spring Boot Web Application，其中使用了Spring-Session，具体的maven依赖如下：

<dependency> <groupId>org.springframework.session</groupId> <artifactId>spring-session</artifactId> lt;/dependency>

在启动过程中，出现了如下错误信息：

Error starting ApplicationContext. To display the auto-configuration report re-run your application with 'debug' enabled. 2017-02-23 17:48:10.710 ERROR 29484 --- [ restartedMain] o.s.boot.SpringApplication : Application startup failed org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.boot.autoconfigure.session.SessionAutoConfiguration$SessionRepositoryValidator': Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: No session repository could be auto-configured, check your configuration (session store type is 'null') at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessBeforeInitialization(InitDestroyAnnotationBeanPostProcessor.java:137) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyBeanPostProcessorsBeforeInitialization(AbstractAutowireCapableBeanFactory.java:409) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1620) 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.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:122) at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:737) at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:370) at org.springframework.boot.SpringApplication.run(SpringApplication.java:314) at org.springframework.boot.SpringApplication.run(SpringApplication.java:1162) at org.springframework.boot.SpringApplication.run(SpringApplication.java:1151) at org.rosebird.data.stock.StockdataApplication.main(StockdataApplication.java:10) 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:497) at org.springframework.boot.devtools.restart.RestartLauncher.run(RestartLauncher.java:49) Caused by: java.lang.IllegalArgumentException: No session repository could be auto-configured, check your configuration (session store type is 'null') at org.springframework.util.Assert.notNull(Assert.java:115) at org.springframework.boot.autoconfigure.session.SessionAutoConfiguration$SessionRepositoryValidator.checkSessionRepository(SessionAutoConfiguration.java:100) 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:497) at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleElement.invoke(InitDestroyAnnotationBeanPostProcessor.java:366) at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleMetadata.invokeInitMethods(InitDestroyAnnotationBeanPostProcessor.java:311) at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessBeforeInitialization(InitDestroyAnnotationBeanPostProcessor.java:134) ... 23 common frames omitted

异常栈很长，关键的错误信息是：No session repository could be auto-configured, check your configuration (session store type is 'null') ，这个信息对于我们进行问题分析提供了非常大的指引， 我们将重点放在session store type的功能分析上。

三、问题的解决与分析

在网上搜索之后，我们发现session store type使用来存放session的存储方式，目前Spring boot中只支持Redis方式。 由于本应用暂无需将session放入redis的需求，故这里就可以将session store type设置为none.

这里我们将此配置信息放入application.properites之中：

# default-store in spring session. it will be set in redis only outside. spring.session.store-type=none

重新启动应用，错误信息消失， 我们可以看到了启动正常的信息了：

2017-02-23 19:36:17.437 INFO 10500 --- [ restartedMain] o.s.s.web.DefaultSecurityFilterChain : Creating filter chain: OrRequestMatcher [requestMatchers=[Ant [pattern='/css/**'], Ant [pattern='/js/**'], Ant [pattern='/images/**'], Ant [pattern='/webjars/**'], Ant [pattern='favicon.ico'], Ant [pattern='/error']]], [] 2017-02-23 19:36:17.823 INFO 10500 --- [ restartedMain] o.s.s.web.DefaultSecurityFilterChain : Creating filter chain: OrRequestMatcher [requestMatchers=[Ant [pattern='/**']]], [org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter@6c7bc3c3, org.springframework.security.web.context.SecurityContextPersistenceFilter@7e251380, org.springframework.security.web.header.HeaderWriterFilter@d2c9b20, org.springframework.security.web.authentication.logout.LogoutFilter@32d5aa81, org.springframework.security.web.authentication./questions/38194650/no-session-repository-could-be-auto-configured-check-your-configuration-sessio