Spring-Boot：将Redis用作会话存储时发生异常

Question

我正在尝试使用spring-boot创建一个最小的Web应用程序，该应用程序将redis用作会话存储。 目标是在Web应用程序的多个实例之间共享会话状态。 该应用程序在没有Redis的情况下可以正常工作（使用“正常”会话），但是在启用Redis的配置后引发异常。 我遵循了本教程 。 该应用程序通过“ java -jar path_to.jar”启动。

要使该应用程序再次运行，只需注释掉配置类即可（请参见下文）。

第一次尝试包括部署到Heroku，但是在使用本地Redis服务器的计算机上，这也是相同的问题。 连接字符串的环境变量已正确设置。

整个应用程序仅包含以下片段。 我想念什么吗？ 谢谢。

组态：

@Profile("production")
@Configuration
@EnableRedisHttpSession
public class ProductionRedisConfiguration {

    @Bean
    public JedisConnectionFactory connectionFactory() throws URISyntaxException {
        JedisConnectionFactory redis = new JedisConnectionFactory();
        String redisUrl = System.getenv("REDISCLOUD_URL");

        URI redisUri = new URI(redisUrl);
        redis.setHostName(redisUri.getHost());
        redis.setPort(redisUri.getPort());
        redis.setPassword(redisUri.getUserInfo().split(":",2)[1]);
        return redis;
    }

    static class Initializer  extends AbstractHttpSessionApplicationInitializer {
        public Initializer() {
            super(ProductionRedisConfiguration.class);
        }
    }
}

“应用”：

@EnableAutoConfiguration
@ComponentScan
public class Application {
    private static final Logger LOGGER = getLogger(Application.class);
    public static void main(String[] args) throws Throwable {
        SpringApplication.run(Application.class, args);
    }
}

。

@Controller
public class GreetingController {

    @RequestMapping("/")
    public @ResponseBody String session(HttpServletRequest request) {
        String name = (String) request.getSession().getAttribute("name");
        if(name != null) {
            return "Hello, " + name;
        } else {
            String newName = "User " + new Random().nextInt(1000000);
            request.getSession().setAttribute("name", newName);
            return "No session found, you are now called " + newName;
        }
    }
}

依存关系：

<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.session</groupId>
        <artifactId>spring-session</artifactId>
        <version>1.0.1.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-redis</artifactId>
    </dependency>
</dependencies>

跟踪：

java.lang.reflect.InvocationTargetException
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
        at java.lang.reflect.Method.invoke(Unknown Source)
        at org.springframework.boot.loader.MainMethodRunner.run(MainMethodRunner.java:53)
        at java.lang.Thread.run(Unknown Source)
Caused by: org.springframework.context.ApplicationContextException: Unable to start embedded container; nested exception is org.springframework.boot.c
ontext.embedded.EmbeddedServletContainerException: Unable to start embedded Tomcat
        at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.onRefresh(EmbeddedWebApplicationContext.java:140)
        at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:476)
        at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:124)
        at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:609)
        at org.springframework.boot.SpringApplication.run(SpringApplication.java:321)
        at org.springframework.boot.SpringApplication.run(SpringApplication.java:806)
        at org.springframework.boot.SpringApplication.run(SpringApplication.java:795)
        at com.backbase.progfun.Application.main(Application.java:17)
        ... 6 more
Caused by: org.springframework.boot.context.embedded.EmbeddedServletContainerException: Unable to start embedded Tomcat
        at org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainer.initialize(TomcatEmbeddedServletContainer.java:104)
        at org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainer.<init>(TomcatEmbeddedServletContainer.java:67)
        at org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainerFactory.getTomcatEmbeddedServletContainer(TomcatEmbeddedServ
letContainerFactory.java:258)
        at org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainerFactory.getEmbeddedServletContainer(TomcatEmbeddedServletCon
tainerFactory.java:138)
        at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.createEmbeddedServletContainer(EmbeddedWebApplicationContext.java:1
60)
        at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.onRefresh(EmbeddedWebApplicationContext.java:137)
        ... 13 more
Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardServer[-1]]
        at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)
        at org.apache.catalina.startup.Tomcat.start(Tomcat.java:341)
        at org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainer.initialize(TomcatEmbeddedServletContainer.java:77)
        ... 18 more
Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardService[Tomcat]]
        at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)
        at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:732)
        at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
        ... 20 more
Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Tomcat]]
        at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)
        at org.apache.catalina.core.StandardService.startInternal(StandardService.java:443)
        at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
        ... 22 more
Caused by: org.apache.catalina.LifecycleException: A child container failed during start
        at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1131)
        at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:302)
        at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
        ... 24 more

Answer 1

看来最近您还需要为部署在Heroku上的应用程序设置REDIS_PROVIDER配置REDIS_PROVIDER 。

如果可以解决问题，请尝试为您的应用和heroku config:set REDIS_PROVIDER=REDISCLOUD_URL运行以下命令： heroku config:set REDIS_PROVIDER=REDISCLOUD_URL