我试图使用 Spring Boot + Maven 设置这个 Spring-Session 示例（GIT 链接中的源代码是使用 Gradle）。没有编译错误，可部署的 WAR 文件也使用重新打包目标生成。
尝试在我的 WildFly 服务器中部署 WAR 文件时，我收到以下与 Redis 相关的错误。我的机器上没有运行 Redis 服务器（因为我假设嵌入式 Redis 实例将作为应用程序的一部分创建，即使在部署的 WAR 文件中也是如此）
文件：EmbeddedRedisConfiguration.java
引起：
java.lang.NullPointerException
at java.util.Objects.requireNonNull(Objects.java:203) [rt.jar:1.8.0_25]
at java.nio.file.Files.copy(Files.java:2984) [rt.jar:1.8.0_25]
at redis.embedded.RedisServer.extractExecutableFromJar(RedisServer.java:85)
at redis.embedded.RedisServer.<init>(RedisServer.java:69)
at redis.embedded.RedisServer.<init>(RedisServer.java:63)
at hello.EmbeddedRedisConfiguration$RedisServerBean.afterPropertiesSet(EmbeddedRedisConfiguration.java:55)
环境：以域模式运行的WildFly8.2（以Full-HA配置文件运行的3个节点） 应用：Spring Boot + Spring Session + Maven
问题：此错误是因为在将 WAR 文件部署到容器时无法创建嵌入式 Redis 实例吗？我还没有尝试将它作为可执行的 WAR 文件运行。
完整的错误堆栈：
[Server:server-four] 23:52:46,815 ERROR [org.jboss.msc.service.fail] (MSC service thread 1-4) MSC000001: Failed to start service jboss.undertow.deployment.default-server.default-host."/gs-spring-boot-0.1.0": org.jboss.msc.service.StartException in service jboss.undertow.deployment.default-server.default-host."/gs-spring-boot-0.1.0": Failed to start service
[Server:server-four] at org.jboss.msc.service.ServiceControllerImpl$StartTask.run(ServiceControllerImpl.java:1904) [jboss-msc-1.2.2.Final.jar:1.2.2.Final]
[Server:server-four] at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [rt.jar:1.8.0_25]
[Server:server-four] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [rt.jar:1.8.0_25]
[Server:server-four] at java.lang.Thread.run(Thread.java:745) [rt.jar:1.8.0_25]
[Server:server-four] Caused by: java.lang.RuntimeException: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'redisServer' defined in class path resource [hello/EmbeddedRedisConfiguration.class]: Invocation of init method failed; nested exception is java.lang.NullPointerException
[Server:server-four] at io.undertow.servlet.core.DeploymentManagerImpl.deploy(DeploymentManagerImpl.java:222)
[Server:server-four] at org.wildfly.extension.undertow.deployment.UndertowDeploymentService.startContext(UndertowDeploymentService.java:87)
[Server:server-four] at org.wildfly.extension.undertow.deployment.UndertowDeploymentService.start(UndertowDeploymentService.java:72)
[Server:server-four] at org.jboss.msc.service.ServiceControllerImpl$StartTask.startService(ServiceControllerImpl.java:1948) [jboss-msc-1.2.2.Final.jar:1.2.2.Final]
[Server:server-four] at org.jboss.msc.service.ServiceControllerImpl$StartTask.run(ServiceControllerImpl.java:1881) [jboss-msc-1.2.2.Final.jar:1.2.2.Final]
[Server:server-four] ... 3 more
[Server:server-four] Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'redisServer' defined in class path resource [hello/EmbeddedRedisConfiguration.class]: Invocation of init method failed; nested exception is java.lang.NullPointerException
[Server:server-four] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1554)
[Server:server-four] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:539)
[Server:server-four] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:475)
[Server:server-four] at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:302)
[Server:server-four] at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228)
[Server:server-four] at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:298)
[Server:server-four] at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:198)
[Server:server-four] at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:116)
[Server:server-four] at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:611)
[Server:server-four] at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:464)
[Server:server-four] at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:109)
[Server:server-four] at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:691)
[Server:server-four] at org.springframework.boot.SpringApplication.run(SpringApplication.java:320)
[Server:server-four] at org.springframework.boot.builder.SpringApplicationBuilder.run(SpringApplicationBuilder.java:142)
[Server:server-four] at org.springframework.boot.context.web.SpringBootServletInitializer.createRootApplicationContext(SpringBootServletInitializer.java:89)
[Server:server-four] at org.springframework.boot.context.web.SpringBootServletInitializer.onStartup(SpringBootServletInitializer.java:51)
[Server:server-four] at org.springframework.web.SpringServletContainerInitializer.onStartup(SpringServletContainerInitializer.java:175)
[Server:server-four] at io.undertow.servlet.core.DeploymentManagerImpl.deploy(DeploymentManagerImpl.java:182)
[Server:server-four] ... 7 more
**[Server:server-four] Caused by: java.lang.NullPointerException
[Server:server-four] at java.util.Objects.requireNonNull(Objects.java:203) [rt.jar:1.8.0_25]
[Server:server-four] at java.nio.file.Files.copy(Files.java:2984) [rt.jar:1.8.0_25]
[Server:server-four] at redis.embedded.RedisServer.extractExecutableFromJar(RedisServer.java:85)
[Server:server-four] at redis.embedded.RedisServer.<init>(RedisServer.java:69)
[Server:server-four] at redis.embedded.RedisServer.<init>(RedisServer.java:63)
[Server:server-four] at hello.EmbeddedRedisConfiguration$RedisServerBean.afterPropertiesSet(EmbeddedRedisConfiguration.java:55)**
[Server:server-four] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1613)
[Server:server-four] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1550)
[Server:server-four] ... 24 more
[Server:server-four]