背景：本MUEAS项目，一开始的时候，是没有引入redis的，考虑到后期性能的问题而引入。之前没有引用redis的时候，用户登录是正常的。但是，在加入redis支持后，登录就出错！错误如下：

   .   ____          _            __ _ _

  /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \

 ( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \

  \\/  ___)| |_)| | | | | || (_| |  ) ) ) )

   '  |____| .__|_| |_|_| |_\__, | / / / /

  =========|_|==============|___/=/_/_/_/

  :: Spring Boot ::        (v1.2.7.RELEASE)

 [-- ::37.165] log4j -   INFO [main] --- Application: Starting Application on CloudGame with PID  (/home/webWps/mueas-mongo/target/classes started by root in /home/webWps/mueas-mongo)

 [-- ::37.237] log4j -   INFO [main] --- AnnotationConfigEmbeddedWebApplicationContext: Refreshing org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@7c271d34: startup date [Tue Dec  :: CST ]; root of context hierarchy

 [-- ::39.868] log4j -   INFO [main] --- AutowiredAnnotationBeanPostProcessor: JSR- 'javax.inject.Inject' annotation found and supported for autowiring

 [-- ::40.163] log4j -   INFO [main] --- PostProcessorRegistrationDelegate$BeanPostProcessorChecker: Bean 'org.springframework.scheduling.annotation.SchedulingConfiguration' of type [class org.springframework.scheduling.annotation.SchedulingConfiguration$$EnhancerBySpringCGLIB$$] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)

 [-- ::40.419] log4j -   INFO [main] --- PostProcessorRegistrationDelegate$BeanPostProcessorChecker: Bean 'org.springframework.security.config.annotation.configuration.ObjectPostProcessorConfiguration' of type [class org.springframework.security.config.annotation.configuration.ObjectPostProcessorConfiguration$$EnhancerBySpringCGLIB$$525eef57] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)

 [-- ::40.449] log4j -   INFO [main] --- PostProcessorRegistrationDelegate$BeanPostProcessorChecker: Bean 'objectPostProcessor' of type [class org.springframework.security.config.annotation.configuration.AutowireBeanFactoryObjectPostProcessor] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)

 [-- ::40.451] log4j -   INFO [main] --- PostProcessorRegistrationDelegate$BeanPostProcessorChecker: Bean 'org.springframework.security.access.expression.method.DefaultMethodSecurityExpressionHandler@2cd84149' of type [class org.springframework.security.access.expression.method.DefaultMethodSecurityExpressionHandler] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)

 [-- ::40.476] log4j -   INFO [main] --- PostProcessorRegistrationDelegate$BeanPostProcessorChecker: Bean 'mueasPermissionEvaluator' of type [class com.tinguish.mueas.infra.security.MueasPermissionEvaluator] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)

 [-- ::40.540] log4j -   INFO [main] --- PostProcessorRegistrationDelegate$BeanPostProcessorChecker: Bean 'methodSecurityConfig' of type [class com.tinguish.mueas.infra.security.MethodSecurityConfig$$EnhancerBySpringCGLIB$$5242b1ec] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)

 [-- ::40.557] log4j -   INFO [main] --- PostProcessorRegistrationDelegate$BeanPostProcessorChecker: Bean 'methodSecurityMetadataSource' of type [class org.springframework.security.access.method.DelegatingMethodSecurityMetadataSource] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)

 [-- ::40.562] log4j -   INFO [main] --- PostProcessorRegistrationDelegate$BeanPostProcessorChecker: Bean 'metaDataSourceAdvisor' of type [class org.springframework.security.access.intercept.aopalliance.MethodSecurityMetadataSourceAdvisor] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)

 [-- ::41.039] log4j -   INFO [main] --- TomcatEmbeddedServletContainer: Tomcat initialized with port(s):  (http)

 [-- ::41.449] log4j -   INFO [main] --- StandardService: Starting service Tomcat

 [-- ::41.451] log4j -   INFO [main] --- StandardEngine: Starting Servlet Engine: Apache Tomcat/8.0.

 [-- ::41.657] log4j -   INFO [localhost-startStop-] --- [/]: Initializing Spring embedded WebApplicationContext

 [-- ::41.657] log4j -   INFO [localhost-startStop-] --- ContextLoader: Root WebApplicationContext: initialization completed in  ms

 [-- ::44.031] log4j -   INFO [localhost-startStop-] --- DefaultSecurityFilterChain: Creating filter chain: Ant [pattern='/css/**'], []

 [-- ::44.031] log4j -   INFO [localhost-startStop-] --- DefaultSecurityFilterChain: Creating filter chain: Ant [pattern='/js/**'], []

 [-- ::44.031] log4j -   INFO [localhost-startStop-] --- DefaultSecurityFilterChain: Creating filter chain: Ant [pattern='/images/**'], []

 [-- ::44.031] log4j -   INFO [localhost-startStop-] --- DefaultSecurityFilterChain: Creating filter chain: Ant [pattern='/**/favicon.ico'], []

 [-- ::44.031] log4j -   INFO [localhost-startStop-] --- DefaultSecurityFilterChain: Creating filter chain: Ant [pattern='/error'], []

 [-- ::44.138] log4j -   INFO [localhost-startStop-] --- DefaultSecurityFilterChain: Creating filter chain: org.springframework.security.web.util.matcher.AnyRequestMatcher@, [org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter@272b811d, org.springframework.security.web.context.SecurityContextPersistenceFilter@1ab55f98, org.springframework.security.web.header.HeaderWriterFilter@7da7fe14, org.springframework.security.web.authentication.logout.LogoutFilter@296758e5, org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter@55ac5e8a, org.springframework.security.web.savedrequest.RequestCacheAwareFilter@28facd93, org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter@74f4c543, org.springframework.security.web.authentication.rememberme.RememberMeAuthenticationFilter@, org.springframework.security.web.authentication.AnonymousAuthenticationFilter@1929ab02, org.springframework.security.web.session.SessionManagementFilter@615a1d5f, org.springframework.security.web.access.ExceptionTranslationFilter@1468193e, org.springframework.security.web.access.intercept.FilterSecurityInterceptor@273c59de]

 [-- ::44.155] log4j -   INFO [localhost-startStop-] --- DefaultSecurityFilterChain: Creating filter chain: OrRequestMatcher [requestMatchers=[Ant [pattern='/**']]], [org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter@5f8f81db, org.springframework.security.web.context.SecurityContextPersistenceFilter@165973f5, org.springframework.security.web.header.HeaderWriterFilter@723a02aa, org.springframework.security.web.authentication.logout.LogoutFilter@60c20fb6, org.springframework.security.web.authentication.www.BasicAuthenticationFilter@6495a75a, org.springframework.security.web.savedrequest.RequestCacheAwareFilter@4acbe549, org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter@103a41fc, org.springframework.security.web.authentication.AnonymousAuthenticationFilter@469681e0, org.springframework.security.web.session.SessionManagementFilter@3e85217c, org.springframework.security.web.access.ExceptionTranslationFilter@45c69c37, org.springframework.security.web.access.intercept.FilterSecurityInterceptor@3470e41a]

 [-- ::44.471] log4j -   INFO [localhost-startStop-] --- FilterRegistrationBean: Mapping filter: 'characterEncodingFilter' to: [/*]

 [2015-12-29 10:18:44.471] log4j - 31595  INFO [localhost-startStop-1] --- FilterRegistrationBean: Mapping filter: 'hiddenHttpMethodFilter' to: [/*]

 [2015-12-29 10:18:44.472] log4j - 31595  INFO [localhost-startStop-1] --- FilterRegistrationBean: Mapping filter: 'springSessionRepositoryFilter' to: [/*]

 [2015-12-29 10:18:44.472] log4j - 31595  INFO [localhost-startStop-1] --- FilterRegistrationBean: Mapping filter: 'springSecurityFilterChain' to: [/*]

 [2015-12-29 10:18:44.472] log4j - 31595  INFO [localhost-startStop-1] --- ServletRegistrationBean: Mapping servlet: 'dispatcherServlet' to [/]

 [2015-12-29 10:18:44.838] log4j - 31595  INFO [main] --- RequestMappingHandlerAdapter: Looking for @ControllerAdvice: org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@7c271d34: startup date [Tue Dec 29 10:18:37 CST 2015]; root of context hierarchy

 [2015-12-29 10:18:44.926] log4j - 31595  INFO [main] --- RequestMappingHandlerMapping: Mapped "{[/user/setting/userid],methods=[POST]}" onto public java.util.Map<java.lang.String, java.lang.String> com.tinguish.mueas.user.controller.UserController.userId(com.tinguish.mueas.user.model.User,java.lang.String)

 [2015-12-29 10:18:44.926] log4j - 31595  INFO [main] --- RequestMappingHandlerMapping: Mapped "{[/user/setting/pri_college]}" onto public java.util.Map<java.lang.String, java.lang.String> com.tinguish.mueas.user.controller.UserController.userPriCollege(com.tinguish.mueas.user.model.User)

 [2015-12-29 10:18:44.927] log4j - 31595  INFO [main] --- RequestMappingHandlerMapping: Mapped "{[/user/setting/sec_college]}" onto public java.util.Map<java.lang.String, java.lang.String> com.tinguish.mueas.user.controller.UserController.userSecCollege(com.tinguish.mueas.user.model.User)

 [2015-12-29 10:18:44.927] log4j - 31595  INFO [main] --- RequestMappingHandlerMapping: Mapped "{[/user/setting/check/oldPassword]}" onto public java.util.Map<java.lang.String, java.lang.String> com.tinguish.mueas.user.controller.UserController.checkOldPassword(com.tinguish.mueas.user.model.User,java.lang.String)

 [2015-12-29 10:18:44.927] log4j - 31595  INFO [main] --- RequestMappingHandlerMapping: Mapped "{[/user/setting]}" onto public org.springframework.web.servlet.ModelAndView com.tinguish.mueas.user.controller.UserController.mySetting(com.tinguish.mueas.user.model.User)

 [2015-12-29 10:18:44.927] log4j - 31595  INFO [main] --- RequestMappingHandlerMapping: Mapped "{[/user/m_single]}" onto public org.springframework.web.servlet.ModelAndView com.tinguish.mueas.user.controller.UserController.createSingleUser()

 [2015-12-29 10:18:44.927] log4j - 31595  INFO [main] --- RequestMappingHandlerMapping: Mapped "{[/user/m_multi]}" onto public org.springframework.web.servlet.ModelAndView com.tinguish.mueas.user.controller.UserController.createMultiUsers()

 [2015-12-29 10:18:44.928] log4j - 31595  INFO [main] --- RequestMappingHandlerMapping: Mapped "{[/user/m_mgmt]}" onto public org.springframework.web.servlet.ModelAndView com.tinguish.mueas.user.controller.UserController.mgmtUsers(com.tinguish.mueas.user.model.User)

 [2015-12-29 10:18:44.928] log4j - 31595  INFO [main] --- RequestMappingHandlerMapping: Mapped "{[/user/new/one]}" onto public java.util.Map<java.lang.String, java.lang.String> com.tinguish.mueas.user.controller.UserController.createUser(javax.servlet.http.HttpServletRequest)

 [2015-12-29 10:18:44.928] log4j - 31595  INFO [main] --- RequestMappingHandlerMapping: Mapped "{[/user/setting/profile]}" onto public java.util.Map<java.lang.String, java.lang.String> com.tinguish.mueas.user.controller.UserController.userProfile(com.tinguish.mueas.user.model.User)

 [2015-12-29 10:18:44.928] log4j - 31595  INFO [main] --- RequestMappingHandlerMapping: Mapped "{[/user/setting/username],methods=[POST]}" onto public java.util.Map<java.lang.String, java.lang.String> com.tinguish.mueas.user.controller.UserController.userName(com.tinguish.mueas.user.model.User,java.lang.String)

 [2015-12-29 10:18:44.929] log4j - 31595  INFO [main] --- RequestMappingHandlerMapping: Mapped "{[/user/setting/password]}" onto public java.util.Map<java.lang.String, java.lang.String> com.tinguish.mueas.user.controller.UserController.userPassword(com.tinguish.mueas.user.model.User,java.lang.String,java.lang.String)

 [2015-12-29 10:18:44.929] log4j - 31595  INFO [main] --- RequestMappingHandlerMapping: Mapped "{[/ || /home]}" onto public java.lang.String com.tinguish.mueas.infra.login.LoginController.home()

 [2015-12-29 10:18:44.930] log4j - 31595  INFO [main] --- RequestMappingHandlerMapping: Mapped "{[/seeu]}" onto public java.lang.String com.tinguish.mueas.infra.login.LoginController.logout()

 [2015-12-29 10:18:44.930] log4j - 31595  INFO [main] --- RequestMappingHandlerMapping: Mapped "{[/login]}" onto public org.springframework.web.servlet.ModelAndView com.tinguish.mueas.infra.login.LoginController.login(javax.servlet.http.HttpServletRequest,javax.servlet.http.HttpServletResponse)

 [2015-12-29 10:18:44.931] log4j - 31595  INFO [main] --- RequestMappingHandlerMapping: Mapped "{[/password/forgot],methods=[POST]}" onto public java.lang.String com.tinguish.mueas.infra.password.ForgotPasswordController.forgetPassword(com.tinguish.mueas.user.model.User,org.springframework.ui.Model) throws javax.mail.MessagingException,java.io.IOException

 [2015-12-29 10:18:44.931] log4j - 31595  INFO [main] --- RequestMappingHandlerMapping: Mapped "{[/password/forgot],methods=[GET]}" onto public java.lang.String com.tinguish.mueas.infra.password.ForgotPasswordController.resetPasswordView(org.springframework.ui.Model)

 [2015-12-29 10:18:44.932] log4j - 31595  INFO [main] --- RequestMappingHandlerMapping: Mapped "{[/password/reset],methods=[GET]}" onto public java.lang.String com.tinguish.mueas.infra.password.ResetPasswordController.resetpasswordView(java.lang.String,org.springframework.ui.Model)

 [2015-12-29 10:18:44.932] log4j - 31595  INFO [main] --- RequestMappingHandlerMapping: Mapped "{[/password/reset],methods=[POST]}" onto public java.lang.String com.tinguish.mueas.infra.password.ResetPasswordController.resetPassword(java.lang.String,com.tinguish.mueas.user.model.User,org.springframework.ui.Model)

 [2015-12-29 10:18:44.932] log4j - 31595  INFO [main] --- RequestMappingHandlerMapping: Mapped "{[/error]}" onto org.springframework.web.servlet.ModelAndView com.tinguish.mueas.infra.error.MueasErrorController.error(javax.servlet.http.HttpServletRequest,javax.servlet.http.HttpServletResponse)

 [2015-12-29 10:18:44.933] log4j - 31595  INFO [main] --- RequestMappingHandlerMapping: Mapped "{[/mgmt/score/ || /mgmt/score]}" onto public org.springframework.web.servlet.ModelAndView com.tinguish.mueas.score.ScoreMgmtController.Score()

 [2015-12-29 10:18:44.992] log4j - 31595  INFO [main] --- SimpleUrlHandlerMapping: Mapped URL path [/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]

 [2015-12-29 10:18:44.993] log4j - 31595  INFO [main] --- SimpleUrlHandlerMapping: Mapped URL path [/webjars/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]

 [2015-12-29 10:18:45.090] log4j - 31595  INFO [main] --- SimpleUrlHandlerMapping: Mapped URL path [/**/favicon.ico] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]

 [-- ::45.544] log4j -   INFO [main] --- AnnotationMBeanExporter: Registering beans for JMX exposure on startup

 [-- ::45.554] log4j -   INFO [main] --- DefaultLifecycleProcessor: Starting beans in phase

 [-- ::45.757] log4j -   INFO [main] --- TomcatEmbeddedServletContainer: Tomcat started on port(s):  (http)

 [-- ::45.760] log4j -   INFO [main] --- Application: Started Application in 8.99 seconds (JVM running for 9.316)

 [-- ::41.487] log4j -   INFO [http-nio--exec-] --- [/]: Initializing Spring FrameworkServlet 'dispatcherServlet'

 [-- ::41.488] log4j -   INFO [http-nio--exec-] --- DispatcherServlet: FrameworkServlet 'dispatcherServlet': initialization started

 [-- ::41.507] log4j -   INFO [http-nio--exec-] --- DispatcherServlet: FrameworkServlet 'dispatcherServlet': initialization completed in  ms

 [-- ::41.690] log4j -   INFO [http-nio--exec-] --- TemplateEngine: [THYMELEAF] INITIALIZING TEMPLATE ENGINE

 [-- ::41.765] log4j -   INFO [http-nio--exec-] --- AbstractTemplateResolver: [THYMELEAF] INITIALIZING TEMPLATE RESOLVER: org.thymeleaf.templateresolver.TemplateResolver

 [-- ::41.765] log4j -   INFO [http-nio--exec-] --- AbstractTemplateResolver: [THYMELEAF] TEMPLATE RESOLVER INITIALIZED OK

 [-- ::41.766] log4j -   INFO [http-nio--exec-] --- AbstractMessageResolver: [THYMELEAF] INITIALIZING MESSAGE RESOLVER: org.thymeleaf.spring4.messageresolver.SpringMessageResolver

 [-- ::41.766] log4j -   INFO [http-nio--exec-] --- AbstractMessageResolver: [THYMELEAF] MESSAGE RESOLVER INITIALIZED OK

 [-- ::41.775] log4j -   INFO [http-nio--exec-] --- CONFIG: [THYMELEAF] TEMPLATE ENGINE CONFIGURATION:

 [THYMELEAF] * Cache Factory implementation: org.thymeleaf.cache.StandardCacheManager

 [THYMELEAF] * Template modes:

 [THYMELEAF]     * VALIDXML

 [THYMELEAF]     * HTML5

 [THYMELEAF]     * VALIDXHTML

 [THYMELEAF]     * LEGACYHTML5

 [THYMELEAF]     * XHTML

 [THYMELEAF]     * XML

 [THYMELEAF] * Template resolvers (in order):

 [THYMELEAF]     * org.thymeleaf.templateresolver.TemplateResolver

 [THYMELEAF] * Message resolvers (in order):

 [THYMELEAF]     * org.thymeleaf.spring4.messageresolver.SpringMessageResolver

 [THYMELEAF] * Dialect [ of ]: org.thymeleaf.spring4.dialect.SpringStandardDialect

 [THYMELEAF]     * Prefix: "th"

 [THYMELEAF] * Dialect [ of ]: org.thymeleaf.extras.springsecurity3.dialect.SpringSecurityDialect

 [THYMELEAF]     * Prefix: "sec"

 [THYMELEAF] * Dialect [ of ]: nz.net.ultraq.thymeleaf.LayoutDialect

 [THYMELEAF]     * Prefix: "layout"

 [THYMELEAF] TEMPLATE ENGINE CONFIGURED OK

 [-- ::41.775] log4j -   INFO [http-nio--exec-] --- TemplateEngine: [THYMELEAF] TEMPLATE ENGINE INITIALIZED

 [-- ::50.834] log4j -  ERROR [http-nio--exec-] --- [dispatcherServlet]: Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception

 org.springframework.data.redis.serializer.SerializationException: Cannot serialize; nested exception is org.springframework.core.serializer.support.SerializationFailedException: Failed to serialize object using DefaultSerializer; nested exception is java.io.NotSerializableException: com.tinguish.mueas.user.model.User

     at org.springframework.data.redis.serializer.JdkSerializationRedisSerializer.serialize(JdkSerializationRedisSerializer.java:)

     at org.springframework.data.redis.core.AbstractOperations.rawHashValue(AbstractOperations.java:)

     at org.springframework.data.redis.core.DefaultHashOperations.putAll(DefaultHashOperations.java:)

     at org.springframework.data.redis.core.DefaultBoundHashOperations.putAll(DefaultBoundHashOperations.java:)

     at org.springframework.session.data.redis.RedisOperationsSessionRepository$RedisSession.saveDelta(RedisOperationsSessionRepository.java:)

     at org.springframework.session.data.redis.RedisOperationsSessionRepository$RedisSession.access$(RedisOperationsSessionRepository.java:)

     at org.springframework.session.data.redis.RedisOperationsSessionRepository.save(RedisOperationsSessionRepository.java:)

     at org.springframework.session.data.redis.RedisOperationsSessionRepository.save(RedisOperationsSessionRepository.java:)

     at org.springframework.session.web.http.SessionRepositoryFilter$SessionRepositoryRequestWrapper.commitSession(SessionRepositoryFilter.java:)

     at org.springframework.session.web.http.SessionRepositoryFilter$SessionRepositoryRequestWrapper.access$(SessionRepositoryFilter.java:)

     at org.springframework.session.web.http.SessionRepositoryFilter.doFilterInternal(SessionRepositoryFilter.java:)

     at org.springframework.session.web.http.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:)

     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:)

     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:)

     at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:)

     at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:)

     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:)

     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:)

     at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:)

     at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:)

     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:)

     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:)

     at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:)

     at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:)

     at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:)

     at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:)

     at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:)

     at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:)

     at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:)

     at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:)

     at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:)

     at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:)

     at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:)

     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:)

     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:)

     at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:)

     at java.lang.Thread.run(Thread.java:)

 Caused by: org.springframework.core.serializer.support.SerializationFailedException: Failed to serialize object using DefaultSerializer; nested exception is java.io.NotSerializableException: com.tinguish.mueas.user.model.User

     at org.springframework.core.serializer.support.SerializingConverter.convert(SerializingConverter.java:)

     at org.springframework.core.serializer.support.SerializingConverter.convert(SerializingConverter.java:)

     at org.springframework.data.redis.serializer.JdkSerializationRedisSerializer.serialize(JdkSerializationRedisSerializer.java:)

     ...  more

 Caused by: java.io.NotSerializableException: com.tinguish.mueas.user.model.User

     at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:)

     at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:)

     at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:)

     at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:)

     at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:)

     at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:)

     at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:)

     at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:)

     at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:)

     at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:)

     at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:)

     at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:)

     at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:)

     at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:)

     at org.springframework.core.serializer.DefaultSerializer.serialize(DefaultSerializer.java:)

     at org.springframework.core.serializer.support.SerializingConverter.convert(SerializingConverter.java:)

     ...  more

很是奇怪。。。。。。

后来拜读了一下spring data redis的官方文档：

From the framework perspective, the data stored in Redis is just bytes. While Redis itself supports various types, for the most part these refer to the way the data is stored rather then what it represents. It is up to the user to decide whether the information gets translated into Strings or any other objects. The conversion between the user (custom) types and raw data (and vice-versa) is handled in Spring Data Redis through the RedisSerializer interface (package org.springframework.data.redis.serializer) which as the name implies, takes care of the serialization process. Multiple implementations are available out of the box, two of which have been already mentioned before in this documentation: the StringRedisSerializer and the JdkSerializationRedisSerializer. However one can use OxmSerializer for Object/XML mapping through Spring 3 OXM support or either JacksonJsonRedisSerializer, Jackson2JsonRedisSerializer or `GenericJackson2JsonRedisSerializer for storing data in JSON format. Do note that the storage format is not limited only to values - it can be used for keys, values or hashes without any restrictions.

从中得到一点启发，那就是spring session redis将session存入到redis后，是将数据序列化后存入的，所以，当没有序列化的数据，直接从数据库读出来，在经过spring security认证之后，会将SecurityContext写入到httpSesson中.

org.springframework.security.web.context.HttpSessionSecurityContextRepository$SaveToSessionResponseWrapper中saveContext的操作，将会把SecurityContext以SPRING_SECURITY_CONTEXT为key写入httpSession中，而SecurityContext中包含了authentication (UsernamePasswordAuthenticationToken),这个，我相信大家都知道了，这个里面就含有当前登录操作的principle，即继承于UserDetails。

出于这个考虑，结合错误提示信息Caused by: java.io.NotSerializableException: com.tinguish.mueas.user.model.User，于是将我的User类，改为下面的形式：

 //注意，我的User继承BasicUser，所以，只将BasicUser继承Serializable。

 public class BasicUser implements Serializable{

     /**

      *

      */

     private static final long serialVersionUID = -8366929034564774130L;

        。。。。。。。。。。。。。

 }

经过上面的简单修改后，果然，可以正常的登录了，不再出现上述错误，一切操作都正常！

正常运行下的redis的session下的内容可以看到：

127.0.0.1:6379> hkeys spring:session:sessions:f5a6f5fa-0d8a-4250-87bd-ca6a82384fe2
1) "sessionAttr:SPRING_SECURITY_SAVED_REQUEST"
2) "sessionAttr:SPRING_SECURITY_CONTEXT"
3) "maxInactiveInterval"
4) "creationTime"
5) "lastAccessedTime"
6) "sessionAttr:SPRING_SECURITY_LAST_EXCEPTION"

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