老师我有点绝望，lombok是啥啊，另外百战商城，还有ego这俩项目我感觉很难了，这个租房项目也要做出来么？

现在发现了一个bug，在details，展示商品详情的时候，查询出来的商品详情需要存到redis中，但是他会把Item实体类中的一个不存在的变量，HouseType4Search给存到里面去，这个变量是一个实体类中的get方法，没有定义他的变量，当查询到商品，运行

@Cacheable(cacheNames = "com:livegoods:details",key = "'getDetails('+#id+')'")
public Item showDetails(String id) {
    Item item = detailsDao.selectById(id);
    System.out.println("要存入缓存的数据"+item.toString());
    return item;
}

这个注解时，会把查出来的item放进去，她额外的添加了这个变量。

当我又创建一个

redisTemplate.opsForValue().set("test:item",item);

时，她就不会 存入这个变量，现在发现应该是这个注解的问题，但是网上搜索没找到解决办法。 

上图就是使用@Cacheable注解生成的缓存

上图是自己设置的RedisTemplete添加

图片传不到mongodb中，控制台错误提示如下

防火墙已关，

fastdfs trackerd和storaged都已经开启

虚拟机ip可以ping通

老师请问，类似这种秒杀业务，实际生产环境中如何尽量避免由物理距离导致的无法抢到？比如我物理距离和服务器很远，那我每次抢的时候岂不是会有先天的劣势？ 如果redis配在多个地点的服务器上，如何做到全局唯一？redis有全局锁或者整个是个单例模式？

谢谢

这个秒杀系统在高并发情况下不会出现超卖问题吗，没有采用分布式锁

老师请问，下面这两个操作是否需要考虑保证同时发生？如果两个中只有一个正常执行，就矛盾了吧？

不清楚是否需要添加类似@transaction的注解保证原子性呢？或者还是应该通过其他方式？

老师我这里有个奇怪的问题，Item类中的名字是isRented, 存入Mongodb的名字也是isRented, 但是存入redis中的名字就变成了rented. 我查了半天都是直接把对象存入了redis，并没有对该变量名更改之后再存入redis呀。。。

老师请问，这里直接OrderDaoImpl中用了mongoTemplate.save(order)。请问这样的操作会直接在mongodb中的Order 表中添加新的order？或者换个文法，程序是如何知道需要往mongodb中的哪个表添加数据的？就是order这个对象的java类Order吗？

老师请问，像mongoTemplate.updateFirst这种API之前没有用过，引申出到了工作中是怎么反应过来具体用哪个api呢？需要翻看组里技术栈文档？

老师，我想问一下这个gateway里面的那个lb://livegoods-hot-product里面的意思是啥，特别是那个lb

老师请问这里问什么AmqpTemplate不需要加@Autowire注解呢？

老师请问，这个项目其他的class之前都没有implements Serializable, 但是怎么到了这里的LivegoodsMessage这个class单独需要写implements Serializable？

谢谢

老师您好，我运行fastdfs的虚拟机，查看service fdfs_trackerd status和service fdfs_storaged status都提示运行正常。防火墙也关闭了。upload文件夹之前也上传了图片，通过浏览器访问都没有问题。

但是现在突然提示现在这个图片地址refused to connect，好奇怪。这个是什么原因呢？图片地址也都是代码里写死的地址。

谢谢

老师，请问这个租房网项目更新完了吗？           

老师您好，在启动LivegoodsGatewayApp时，提示如下错误信息。请问这个应该如何解决呢。谢谢！

Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.

2020-07-08 02:37:12.389 ERROR 84132 --- [           main] o.s.boot.SpringApplication               : Application run failed

org.springframework.context.ApplicationContextException: Unable to start reactive web server; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'nettyReactiveWebServerFactory' defined in class path resource [org/springframework/boot/autoconfigure/web/reactive/ReactiveWebServerFactoryConfiguration$EmbeddedNetty.class]: Unsatisfied dependency expressed through method 'nettyReactiveWebServerFactory' parameter 0; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'reactorServerResourceFactory' defined in class path resource [org/springframework/boot/autoconfigure/web/reactive/ReactiveWebServerFactoryConfiguration$EmbeddedNetty.class]: Invocation of init method failed; nested exception is java.lang.NoClassDefFoundError: io/netty/util/AttributeKey

at org.springframework.boot.web.reactive.context.ReactiveWebServerApplicationContext.onRefresh(ReactiveWebServerApplicationContext.java:81) ~[spring-boot-2.2.5.RELEASE.jar:2.2.5.RELEASE]

at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:544) ~[spring-context-5.2.4.RELEASE.jar:5.2.4.RELEASE]

at org.springframework.boot.web.reactive.context.ReactiveWebServerApplicationContext.refresh(ReactiveWebServerApplicationContext.java:66) ~[spring-boot-2.2.5.RELEASE.jar:2.2.5.RELEASE]

at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:747) [spring-boot-2.2.5.RELEASE.jar:2.2.5.RELEASE]

at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397) [spring-boot-2.2.5.RELEASE.jar:2.2.5.RELEASE]

at org.springframework.boot.SpringApplication.run(SpringApplication.java:315) [spring-boot-2.2.5.RELEASE.jar:2.2.5.RELEASE]

at org.springframework.boot.SpringApplication.run(SpringApplication.java:1226) [spring-boot-2.2.5.RELEASE.jar:2.2.5.RELEASE]

at org.springframework.boot.SpringApplication.run(SpringApplication.java:1215) [spring-boot-2.2.5.RELEASE.jar:2.2.5.RELEASE]

at com.livegoods.gateway.LivegoodsGatewayApplication.main(LivegoodsGatewayApplication.java:13) [classes/:na]

Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'nettyReactiveWebServerFactory' defined in class path resource [org/springframework/boot/autoconfigure/web/reactive/ReactiveWebServerFactoryConfiguration$EmbeddedNetty.class]: Unsatisfied dependency expressed through method 'nettyReactiveWebServerFactory' parameter 0; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'reactorServerResourceFactory' defined in class path resource [org/springframework/boot/autoconfigure/web/reactive/ReactiveWebServerFactoryConfiguration$EmbeddedNetty.class]: Invocation of init method failed; nested exception is java.lang.NoClassDefFoundError: io/netty/util/AttributeKey

at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:798) ~[spring-beans-5.2.4.RELEASE.jar:5.2.4.RELEASE]

at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:539) ~[spring-beans-5.2.4.RELEASE.jar:5.2.4.RELEASE]

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1338) ~[spring-beans-5.2.4.RELEASE.jar:5.2.4.RELEASE]

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1177) ~[spring-beans-5.2.4.RELEASE.jar:5.2.4.RELEASE]

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:557) ~[spring-beans-5.2.4.RELEASE.jar:5.2.4.RELEASE]

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:517) ~[spring-beans-5.2.4.RELEASE.jar:5.2.4.RELEASE]

at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:323) ~[spring-beans-5.2.4.RELEASE.jar:5.2.4.RELEASE]

at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) ~[spring-beans-5.2.4.RELEASE.jar:5.2.4.RELEASE]

at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:321) ~[spring-beans-5.2.4.RELEASE.jar:5.2.4.RELEASE]

at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:207) ~[spring-beans-5.2.4.RELEASE.jar:5.2.4.RELEASE]

at org.springframework.boot.web.reactive.context.ReactiveWebServerApplicationContext.getWebServerFactory(ReactiveWebServerApplicationContext.java:111) ~[spring-boot-2.2.5.RELEASE.jar:2.2.5.RELEASE]

at org.springframework.boot.web.reactive.context.ReactiveWebServerApplicationContext.createWebServer(ReactiveWebServerApplicationContext.java:89) ~[spring-boot-2.2.5.RELEASE.jar:2.2.5.RELEASE]

at org.springframework.boot.web.reactive.context.ReactiveWebServerApplicationContext.onRefresh(ReactiveWebServerApplicationContext.java:78) ~[spring-boot-2.2.5.RELEASE.jar:2.2.5.RELEASE]

... 8 common frames omitted

Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'reactorServerResourceFactory' defined in class path resource [org/springframework/boot/autoconfigure/web/reactive/ReactiveWebServerFactoryConfiguration$EmbeddedNetty.class]: Invocation of init method failed; nested exception is java.lang.NoClassDefFoundError: io/netty/util/AttributeKey

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1796) ~[spring-beans-5.2.4.RELEASE.jar:5.2.4.RELEASE]

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:595) ~[spring-beans-5.2.4.RELEASE.jar:5.2.4.RELEASE]

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:517) ~[spring-beans-5.2.4.RELEASE.jar:5.2.4.RELEASE]

at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:323) ~[spring-beans-5.2.4.RELEASE.jar:5.2.4.RELEASE]

at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) ~[spring-beans-5.2.4.RELEASE.jar:5.2.4.RELEASE]

at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:321) ~[spring-beans-5.2.4.RELEASE.jar:5.2.4.RELEASE]

at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202) ~[spring-beans-5.2.4.RELEASE.jar:5.2.4.RELEASE]

at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:276) ~[spring-beans-5.2.4.RELEASE.jar:5.2.4.RELEASE]

at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1287) ~[spring-beans-5.2.4.RELEASE.jar:5.2.4.RELEASE]

at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1207) ~[spring-beans-5.2.4.RELEASE.jar:5.2.4.RELEASE]

at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:885) ~[spring-beans-5.2.4.RELEASE.jar:5.2.4.RELEASE]

at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:789) ~[spring-beans-5.2.4.RELEASE.jar:5.2.4.RELEASE]

... 20 common frames omitted

Caused by: java.lang.NoClassDefFoundError: io/netty/util/AttributeKey

at reactor.netty.resources.PooledConnectionProvider.<clinit>(PooledConnectionProvider.java:204) ~[reactor-netty-0.9.5.RELEASE.jar:0.9.5.RELEASE]

at reactor.netty.resources.ConnectionProvider$Builder.build(ConnectionProvider.java:439) ~[reactor-netty-0.9.5.RELEASE.jar:0.9.5.RELEASE]

at reactor.netty.resources.ConnectionProvider.fixed(ConnectionProvider.java:331) ~[reactor-netty-0.9.5.RELEASE.jar:0.9.5.RELEASE]

at reactor.netty.resources.ConnectionProvider.fixed(ConnectionProvider.java:272) ~[reactor-netty-0.9.5.RELEASE.jar:0.9.5.RELEASE]

at reactor.netty.resources.ConnectionProvider.fixed(ConnectionProvider.java:251) ~[reactor-netty-0.9.5.RELEASE.jar:0.9.5.RELEASE]

at reactor.netty.tcp.TcpResources.create(TcpResources.java:331) ~[reactor-netty-0.9.5.RELEASE.jar:0.9.5.RELEASE]

at reactor.netty.tcp.TcpResources.getOrCreate(TcpResources.java:275) ~[reactor-netty-0.9.5.RELEASE.jar:0.9.5.RELEASE]

at reactor.netty.http.HttpResources.get(HttpResources.java:42) ~[reactor-netty-0.9.5.RELEASE.jar:0.9.5.RELEASE]

at org.springframework.http.client.reactive.ReactorResourceFactory.afterPropertiesSet(ReactorResourceFactory.java:202) ~[spring-web-5.2.4.RELEASE.jar:5.2.4.RELEASE]

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1855) ~[spring-beans-5.2.4.RELEASE.jar:5.2.4.RELEASE]

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1792) ~[spring-beans-5.2.4.RELEASE.jar:5.2.4.RELEASE]

... 31 common frames omitted

Caused by: java.lang.ClassNotFoundException: io.netty.util.AttributeKey

at java.net.URLClassLoader.findClass(URLClassLoader.java:382) ~[na:1.8.0_211]

at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[na:1.8.0_211]

at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349) ~[na:1.8.0_211]

at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[na:1.8.0_211]

... 42 common frames omitted