我尝试使用spring-boot创建一个最小的Web应用程序，它使用redis作为会话存储。目标是在Web应用程序的多个实例之间共享会话状态。应用程序在没有Redis的情况下正常工作（使用＆＃34;普通＆＃34;会话）但在启用Redis配置后抛出异常。我跟着这个tutorial。该应用程序通过＆＃34; java -jar path_to.jar＆＃34;启动。
要使应用程序再次运行，注释掉配置类就足够了（见下文）。
第一次尝试包括部署到Heroku，但在使用本地Redis服务器的计算机上遇到了同样的问题。正确设置连接字符串的环境变量。
整个应用程序仅包含下面显示的代码段。我错过了什么吗？谢谢。
配置：
@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);
}
}
}
＆＃34;应用＆＃34;：
@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;
}
}
}
依赖关系：
<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
答案 0 :(得分：2)
看来你最近还需要为在Heroku部署的应用设置REDIS_PROVIDER配置变量。
尝试运行以下内容以及适用于您的应用和lmk，如果它可以解决问题：heroku config:set REDIS_PROVIDER=REDISCLOUD_URL