spring session分布式session解决方案&&springboot2.1.5使用spring session启动报错java.lang.IllegalStateException的解决

在使用spring session解决分布式session一致性问题的时候，遇到一个问题，完整报错如下

java.lang.IllegalStateException: Error processing condition on org.springframework.boot.autoconfigure.task.TaskSchedulingAutoConfiguration.taskScheduler
	at org.springframework.boot.autoconfigure.condition.SpringBootCondition.matches(SpringBootCondition.java:64) ~[spring-boot-autoconfigure-2.1.5.RELEASE.jar:2.1.5.RELEASE]
	at org.springframework.context.annotation.ConditionEvaluator.shouldSkip(ConditionEvaluator.java:108) ~[spring-context-5.1.7.RELEASE.jar:5.1.7.RELEASE]
	at org.springframework.context.annotation.ConfigurationClassBeanDefinitionReader.loadBeanDefinitionsForBeanMethod(ConfigurationClassBeanDefinitionReader.java:181) ~[spring-context-5.1.7.RELEASE.jar:5.1.7.RELEASE]
	at org.springframework.context.annotation.ConfigurationClassBeanDefinitionReader.loadBeanDefinitionsForConfigurationClass(ConfigurationClassBeanDefinitionReader.java:141) ~[spring-context-5.1.7.RELEASE.jar:5.1.7.RELEASE]
	at org.springframework.context.annotation.ConfigurationClassBeanDefinitionReader.loadBeanDefinitions(ConfigurationClassBeanDefinitionReader.java:117) ~[spring-context-5.1.7.RELEASE.jar:5.1.7.RELEASE]
	at org.springframework.context.annotation.ConfigurationClassPostProcessor.processConfigBeanDefinitions(ConfigurationClassPostProcessor.java:327) ~[spring-context-5.1.7.RELEASE.jar:5.1.7.RELEASE]
	at org.springframework.context.annotation.ConfigurationClassPostProcessor.postProcessBeanDefinitionRegistry(ConfigurationClassPostProcessor.java:232) ~[spring-context-5.1.7.RELEASE.jar:5.1.7.RELEASE]
	at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanDefinitionRegistryPostProcessors(PostProcessorRegistrationDelegate.java:275) ~[spring-context-5.1.7.RELEASE.jar:5.1.7.RELEASE]
	at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:95) ~[spring-context-5.1.7.RELEASE.jar:5.1.7.RELEASE]
	at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:705) ~[spring-context-5.1.7.RELEASE.jar:5.1.7.RELEASE]
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:531) ~[spring-context-5.1.7.RELEASE.jar:5.1.7.RELEASE]
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:142) ~[spring-boot-2.1.5.RELEASE.jar:2.1.5.RELEASE]
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:775) [spring-boot-2.1.5.RELEASE.jar:2.1.5.RELEASE]
	at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397) [spring-boot-2.1.5.RELEASE.jar:2.1.5.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:316) [spring-boot-2.1.5.RELEASE.jar:2.1.5.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1260) [spring-boot-2.1.5.RELEASE.jar:2.1.5.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1248) [spring-boot-2.1.5.RELEASE.jar:2.1.5.RELEASE]
	at com.xiaxin.AppSession.main(AppSession.java:26) [classes/:na]
Caused by: java.lang.IllegalStateException: Failed to introspect Class [org.springframework.boot.autoconfigure.session.SessionAutoConfiguration$ServletSessionConfiguration] from ClassLoader [sun.misc.Launcher$AppClassLoader@18b4aac2]
	at org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:507) ~[spring-core-5.1.7.RELEASE.jar:5.1.7.RELEASE]
	at org.springframework.util.ReflectionUtils.doWithMethods(ReflectionUtils.java:404) ~[spring-core-5.1.7.RELEASE.jar:5.1.7.RELEASE]
	at org.springframework.util.ReflectionUtils.doWithMethods(ReflectionUtils.java:389) ~[spring-core-5.1.7.RELEASE.jar:5.1.7.RELEASE]
	at org.springframework.util.ReflectionUtils.getUniqueDeclaredMethods(ReflectionUtils.java:447) ~[spring-core-5.1.7.RELEASE.jar:5.1.7.RELEASE]
	at java.util.concurrent.ConcurrentHashMap.computeIfAbsent(ConcurrentHashMap.java:1660) ~[na:1.8.0_102]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.getTypeForFactoryMethod(AbstractAutowireCapableBeanFactory.java:738) ~[spring-beans-5.1.7.RELEASE.jar:5.1.7.RELEASE]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.determineTargetType(AbstractAutowireCapableBeanFactory.java:679) ~[spring-beans-5.1.7.RELEASE.jar:5.1.7.RELEASE]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.predictBeanType(AbstractAutowireCapableBeanFactory.java:647) ~[spring-beans-5.1.7.RELEASE.jar:5.1.7.RELEASE]
	at org.springframework.beans.factory.support.AbstractBeanFactory.isFactoryBean(AbstractBeanFactory.java:1518) ~[spring-beans-5.1.7.RELEASE.jar:5.1.7.RELEASE]
	at org.springframework.beans.factory.support.AbstractBeanFactory.isFactoryBean(AbstractBeanFactory.java:1023) ~[spring-beans-5.1.7.RELEASE.jar:5.1.7.RELEASE]
	at org.springframework.boot.autoconfigure.condition.BeanTypeRegistry.addBeanTypeForNonAliasDefinition(BeanTypeRegistry.java:195) ~[spring-boot-autoconfigure-2.1.5.RELEASE.jar:2.1.5.RELEASE]
	at org.springframework.boot.autoconfigure.condition.BeanTypeRegistry.addBeanTypeForNonAliasDefinition(BeanTypeRegistry.java:159) ~[spring-boot-autoconfigure-2.1.5.RELEASE.jar:2.1.5.RELEASE]
	at org.springframework.boot.autoconfigure.condition.BeanTypeRegistry.addBeanType(BeanTypeRegistry.java:152) ~[spring-boot-autoconfigure-2.1.5.RELEASE.jar:2.1.5.RELEASE]
	at org.springframework.boot.autoconfigure.condition.BeanTypeRegistry.updateTypesIfNecessary(BeanTypeRegistry.java:140) ~[spring-boot-autoconfigure-2.1.5.RELEASE.jar:2.1.5.RELEASE]
	at java.util.Iterator.forEachRemaining(Iterator.java:116) ~[na:1.8.0_102]
	at org.springframework.boot.autoconfigure.condition.BeanTypeRegistry.updateTypesIfNecessary(BeanTypeRegistry.java:135) ~[spring-boot-autoconfigure-2.1.5.RELEASE.jar:2.1.5.RELEASE]
	at org.springframework.boot.autoconfigure.condition.BeanTypeRegistry.getNamesForType(BeanTypeRegistry.java:97) ~[spring-boot-autoconfigure-2.1.5.RELEASE.jar:2.1.5.RELEASE]
	at org.springframework.boot.autoconfigure.condition.OnBeanCondition.collectBeanNamesForType(OnBeanCondition.java:298) ~[spring-boot-autoconfigure-2.1.5.RELEASE.jar:2.1.5.RELEASE]
	at org.springframework.boot.autoconfigure.condition.OnBeanCondition.getBeanNamesForType(OnBeanCondition.java:289) ~[spring-boot-autoconfigure-2.1.5.RELEASE.jar:2.1.5.RELEASE]
	at org.springframework.boot.autoconfigure.condition.OnBeanCondition.getBeanNamesForType(OnBeanCondition.java:278) ~[spring-boot-autoconfigure-2.1.5.RELEASE.jar:2.1.5.RELEASE]
	at org.springframework.boot.autoconfigure.condition.OnBeanCondition.getMatchingBeans(OnBeanCondition.java:189) ~[spring-boot-autoconfigure-2.1.5.RELEASE.jar:2.1.5.RELEASE]
	at org.springframework.boot.autoconfigure.condition.OnBeanCondition.getMatchOutcome(OnBeanCondition.java:160) ~[spring-boot-autoconfigure-2.1.5.RELEASE.jar:2.1.5.RELEASE]
	at org.springframework.boot.autoconfigure.condition.SpringBootCondition.matches(SpringBootCondition.java:47) ~[spring-boot-autoconfigure-2.1.5.RELEASE.jar:2.1.5.RELEASE]
	... 17 common frames omitted
Caused by: java.lang.NoClassDefFoundError: org/springframework/security/web/authentication/RememberMeServices
	at java.lang.ClassLoader.defineClass1(Native Method) ~[na:1.8.0_102]
	at java.lang.ClassLoader.defineClass(ClassLoader.java:763) ~[na:1.8.0_102]
	at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) ~[na:1.8.0_102]
	at java.net.URLClassLoader.defineClass(URLClassLoader.java:467) ~[na:1.8.0_102]
	at java.net.URLClassLoader.access$100(URLClassLoader.java:73) ~[na:1.8.0_102]
	at java.net.URLClassLoader$1.run(URLClassLoader.java:368) ~[na:1.8.0_102]
	at java.net.URLClassLoader$1.run(URLClassLoader.java:362) ~[na:1.8.0_102]
	at java.security.AccessController.doPrivileged(Native Method) ~[na:1.8.0_102]
	at java.net.URLClassLoader.findClass(URLClassLoader.java:361) ~[na:1.8.0_102]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[na:1.8.0_102]
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331) ~[na:1.8.0_102]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[na:1.8.0_102]
	at java.lang.Class.getDeclaredMethods0(Native Method) ~[na:1.8.0_102]
	at java.lang.Class.privateGetDeclaredMethods(Class.java:2701) ~[na:1.8.0_102]
	at java.lang.Class.getDeclaredMethods(Class.java:1975) ~[na:1.8.0_102]
	at org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:489) ~[spring-core-5.1.7.RELEASE.jar:5.1.7.RELEASE]
	... 39 common frames omitted
Caused by: java.lang.ClassNotFoundException: org.springframework.security.web.authentication.RememberMeServices
	at java.net.URLClassLoader.findClass(URLClassLoader.java:381) ~[na:1.8.0_102]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[na:1.8.0_102]
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331) ~[na:1.8.0_102]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[na:1.8.0_102]
	... 55 common frames omitted

2020-04-06 16:39:07.364  WARN 69364 --- [           main] o.s.boot.SpringApplication               : Unable to close ApplicationContext

java.lang.IllegalStateException: Failed to introspect Class [org.springframework.boot.autoconfigure.session.SessionAutoConfiguration$ServletSessionConfiguration] from ClassLoader [sun.misc.Launcher$AppClassLoader@18b4aac2]
	at org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:507) ~[spring-core-5.1.7.RELEASE.jar:5.1.7.RELEASE]
	at org.springframework.util.ReflectionUtils.doWithMethods(ReflectionUtils.java:404) ~[spring-core-5.1.7.RELEASE.jar:5.1.7.RELEASE]
	at org.springframework.util.ReflectionUtils.doWithMethods(ReflectionUtils.java:389) ~[spring-core-5.1.7.RELEASE.jar:5.1.7.RELEASE]
	at org.springframework.util.ReflectionUtils.getUniqueDeclaredMethods(ReflectionUtils.java:447) ~[spring-core-5.1.7.RELEASE.jar:5.1.7.RELEASE]
	at java.util.concurrent.ConcurrentHashMap.computeIfAbsent(ConcurrentHashMap.java:1660) ~[na:1.8.0_102]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.getTypeForFactoryMethod(AbstractAutowireCapableBeanFactory.java:738) ~[spring-beans-5.1.7.RELEASE.jar:5.1.7.RELEASE]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.determineTargetType(AbstractAutowireCapableBeanFactory.java:679) ~[spring-beans-5.1.7.RELEASE.jar:5.1.7.RELEASE]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.predictBeanType(AbstractAutowireCapableBeanFactory.java:647) ~[spring-beans-5.1.7.RELEASE.jar:5.1.7.RELEASE]
	at org.springframework.beans.factory.support.AbstractBeanFactory.isFactoryBean(AbstractBeanFactory.java:1518) ~[spring-beans-5.1.7.RELEASE.jar:5.1.7.RELEASE]
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.doGetBeanNamesForType(DefaultListableBeanFactory.java:509) ~[spring-beans-5.1.7.RELEASE.jar:5.1.7.RELEASE]
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeanNamesForType(DefaultListableBeanFactory.java:479) ~[spring-beans-5.1.7.RELEASE.jar:5.1.7.RELEASE]
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeansOfType(DefaultListableBeanFactory.java:600) ~[spring-beans-5.1.7.RELEASE.jar:5.1.7.RELEASE]
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeansOfType(DefaultListableBeanFactory.java:592) ~[spring-beans-5.1.7.RELEASE.jar:5.1.7.RELEASE]
	at org.springframework.context.support.AbstractApplicationContext.getBeansOfType(AbstractApplicationContext.java:1226) ~[spring-context-5.1.7.RELEASE.jar:5.1.7.RELEASE]
	at org.springframework.boot.SpringApplication.getExitCodeFromMappedException(SpringApplication.java:905) [spring-boot-2.1.5.RELEASE.jar:2.1.5.RELEASE]
	at org.springframework.boot.SpringApplication.getExitCodeFromException(SpringApplication.java:891) [spring-boot-2.1.5.RELEASE.jar:2.1.5.RELEASE]
	at org.springframework.boot.SpringApplication.handleExitCode(SpringApplication.java:877) [spring-boot-2.1.5.RELEASE.jar:2.1.5.RELEASE]
	at org.springframework.boot.SpringApplication.handleRunFailure(SpringApplication.java:826) [spring-boot-2.1.5.RELEASE.jar:2.1.5.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:327) [spring-boot-2.1.5.RELEASE.jar:2.1.5.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1260) [spring-boot-2.1.5.RELEASE.jar:2.1.5.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1248) [spring-boot-2.1.5.RELEASE.jar:2.1.5.RELEASE]
	at com.xiaxin.AppSession.main(AppSession.java:26) [classes/:na]
Caused by: java.lang.NoClassDefFoundError: org/springframework/security/web/authentication/RememberMeServices
	at java.lang.ClassLoader.defineClass1(Native Method) ~[na:1.8.0_102]
	at java.lang.ClassLoader.defineClass(ClassLoader.java:763) ~[na:1.8.0_102]
	at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) ~[na:1.8.0_102]
	at java.net.URLClassLoader.defineClass(URLClassLoader.java:467) ~[na:1.8.0_102]
	at java.net.URLClassLoader.access$100(URLClassLoader.java:73) ~[na:1.8.0_102]
	at java.net.URLClassLoader$1.run(URLClassLoader.java:368) ~[na:1.8.0_102]
	at java.net.URLClassLoader$1.run(URLClassLoader.java:362) ~[na:1.8.0_102]
	at java.security.AccessController.doPrivileged(Native Method) ~[na:1.8.0_102]
	at java.net.URLClassLoader.findClass(URLClassLoader.java:361) ~[na:1.8.0_102]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[na:1.8.0_102]
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331) ~[na:1.8.0_102]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[na:1.8.0_102]
	at java.lang.Class.getDeclaredMethods0(Native Method) ~[na:1.8.0_102]
	at java.lang.Class.privateGetDeclaredMethods(Class.java:2701) ~[na:1.8.0_102]
	at java.lang.Class.getDeclaredMethods(Class.java:1975) ~[na:1.8.0_102]
	at org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:489) ~[spring-core-5.1.7.RELEASE.jar:5.1.7.RELEASE]
	... 21 common frames omitted
Caused by: java.lang.ClassNotFoundException: org.springframework.security.web.authentication.RememberMeServices
	at java.net.URLClassLoader.findClass(URLClassLoader.java:381) ~[na:1.8.0_102]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[na:1.8.0_102]
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331) ~[na:1.8.0_102]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[na:1.8.0_102]
	... 37 common frames omitted


Process finished with exit code 1

先说一下问题出在哪里：

springboot 2.1.5版本存在问题，根据如上报错可以推断缺少类java.lang.ClassNotFoundException: org.springframework.security.web.authentication.RememberMeServices

解决：

更换springboot的版本，我后来换成2.2.2.RELEASE版本问题得到解决，经过验证2.0.0.RELEASE版本也是没有问题问题的

或者还有别的解决方案，我不知道，也不想深究，时间宝贵，看看其他的技术点

spring session分布式session解决方案

maven引入依赖

    org.springframework.boot
    spring-boot-starter-parent
    2.2.2.RELEASE
    


    
        org.springframework.session
        spring-session-core
    
    
        org.springframework.boot
        spring-boot-starter-web 
    
    
        com.alibaba
        fastjson
        1.2.47
    
    
    
        org.springframework.session
        spring-session-data-redis
    
    
        org.apache.commons
        commons-pool2
    

配置

yml 自定义配置

server:
  port: 8080
redis:
  hostname: 192.168.237.137
  port: 6379
  password: 361116

在添加了所需的依赖项之后，我们可以创建Spring配置。Spring配置负责创建servlet过滤器，该过滤器将HttpSession实现替换为Spring Session支持的实现。为此，添加以下Spring配置:

@EnableRedisHttpSession(maxInactiveIntervalInSeconds = 1800)
public class SessionConfig {

	@Value("${redis.hostname:localhost}")
        String hostName;
	@Value("${redis.port:6379}")
	int port;

	@Value("${redis.password}")
        String password;
	@Bean
	public LettuceConnectionFactory connectionFactory() {
		RedisStandaloneConfiguration redisStandaloneConfiguration = new RedisStandaloneConfiguration(hostName, port);
		redisStandaloneConfiguration.setPassword(password);
		return new LettuceConnectionFactory(redisStandaloneConfiguration);
	}
//      jedis依赖
//	@Bean
//	public JedisConnectionFactory connectionFactory() {
//		JedisConnectionFactory connection = new JedisConnectionFactory();
//		connection.setPort(port);
//		connection.setHostName(hostName);
//		connection.setPassword(password);
//		// connection.setDatabase(0);
//		return connection;
//	}
}

Java Servlet容器初始化

我们的Spring配置创建了一个名为springSessionRepositoryFilter的Spring Bean，它实现了Filter。springSessionRepositoryFilter bean负责将HttpSession替换为由Spring session支持的自定义实现。为了让过滤器发挥作用，Spring需要加载配置类。最后，我们需要确保Servlet容器(即Tomcat)对每个请求都使用springSessionRepositoryFilter。幸运的是，Spring Session提供了一个名为AbstractHttpSessionApplicationInitializer的实用工具类，可以简化这两个步骤。下面是一个示例

public class SessionInitializer extends AbstractHttpSessionApplicationInitializer {
	public SessionInitializer() {
		super(SessionConfig.class);
	}
}

 

 

 具体业务逻辑

controller

@RestController
@SpringBootApplication
public class TestSessionController {
	@Value("${server.port}")
	private String serverPort;

	@RequestMapping("/")
	public String index() {
		return serverPort;
	}

	// 创建session
	@RequestMapping("/createSession")
	public String createSession(HttpServletRequest request, String nameValue) {
		HttpSession session = request.getSession();
		session.setAttribute("name", nameValue);
		return "success：" + serverPort;
	}

	// 获取session
	@RequestMapping("/getSession")
	public Object getSession(HttpServletRequest request) {
		HttpSession session = request.getSession(false);
		if (session == null) {
			return serverPort + "：" + "没有session";
		}
		return serverPort + "：" + session.getAttribute("name");
	}

}

环境准备：

nginx配置集群

events {
    worker_connections  1024;
}


http {
    include       mime.types;
    default_type  application/octet-stream;


    sendfile        on;
    #tcp_nopush     on;

    #keepalive_timeout  0;
    keepalive_timeout  65;

    #gzip  on;
   
   upstream backServer {
       server 127.0.0.1:8080;
       server 127.0.0.1:8081;
   }
   server {
        listen       80;
        server_name  www.xiaxin.com;	

        location / {
            proxy_pass http://backServer;
            index  index.html index.htm;
        }

    }

}

结果验证

没有解决分布式sessionb问题之前：

端口为8080的服务器 创建session  nginx轮询到8081的服务器时 没有session信息

使用spring session：

创建session在8080服务器上

 

 获取session：8080、8081服务器上都有了session信息、