Spring Cloud Finchley.SR1 版本的坑：placeholer占位符无法解析！

接入nacos 之后，想把所有的配置丢上去。

启动程序是：

@EnableDiscoveryClient
@RestController
@ComponentScan(basePackages = {"com.lkk"})
@MapperScan(basePackages = {"com.lkk.ppm.doc.service.dao"})
@ImportResource(locations = {"classpath:dubbo.xml"})
@EnableTransactionManagement
@Import({Settings.class, WebConfig.class})
@SpringBootApplication(exclude = {SecurityAutoConfiguration.class})
@EnableWebMvc
@Slf4j
public class DocApplication {

bootstrap.yml文件是：

spring:
  application:
    name: llk_discuss_app
  profiles:
    active: ${PROFILE_ACTIVE:local}
  cloud:
    nacos:
      discovery:
        server-addr: ${NACOS_SERVER_ADDR:192.168.11.196:8848}
        namespace: ${NACOS_CONFIG_NAMESPACE:1f3c60b6-3e28-44eb-9798-7f7eeeff6a8d}
        #group: ${NACOS_CONFIG_GROUP:llk}
      config:
        server-addr: ${NACOS_SERVER_ADDR:192.168.11.196:8848}
        file-extension: yaml
        namespace: ${NACOS_CONFIG_NAMESPACE:1f3c60b6-3e28-44eb-9798-7f7eeeff6a8d}
        group: ${NACOS_CONFIG_GROUP:llk}
        ext-config[0]:
          data-id: llk_stateflow_toggle.yaml
          group: ${NACOS_CONFIG_GROUP:llk}
          refresh: true

 

dubbo.xml 文件是：

   <dubbo:registry  address="${NACOS_ADDR:nacos://127.0.0.1:8848}"  file="erdp_discuss_app.cache"/>
   <dubbo:service interface="com.llk.ppm.discuss.domain.service.ELDiscussService" ref="discussService"/>
   <dubbo:reference id="peopleService" interface="com.llk.platform.system.domain.service.ELPeopleService"/>

...

 

错误是

Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'peopleService': FactoryBean threw exception on object creation; nested exception is java.lang.NumberFormatException: For input string: "8848}"
    at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.doGetObjectFromFactoryBean(FactoryBeanRegistrySupport.java:178) ~[spring-beans-5.0.10.RELEASE.jar:5.0.10.RELEASE]
    at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.getObjectFromFactoryBean(FactoryBeanRegistrySupport.java:101) ~[spring-beans-5.0.10.RELEASE.jar:5.0.10.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.getObjectForBeanInstance(AbstractBeanFactory.java:1644) ~[spring-beans-5.0.10.RELEASE.jar:5.0.10.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.getObjectForBeanInstance(AbstractAutowireCapableBeanFactory.java:1174) ~[spring-beans-5.0.10.RELEASE.jar:5.0.10.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:257) ~[spring-beans-5.0.10.RELEASE.jar:5.0.10.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199) ~[spring-beans-5.0.10.RELEASE.jar:5.0.10.RELEASE]
    at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:251) ~[spring-beans-5.0.10.RELEASE.jar:5.0.10.RELEASE]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.addCandidateEntry(DefaultListableBeanFactory.java:1322) ~[spring-beans-5.0.10.RELEASE.jar:5.0.10.RELEASE]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.findAutowireCandidates(DefaultListableBeanFactory.java:1288) ~[spring-beans-5.0.10.RELEASE.jar:5.0.10.RELEASE]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1098) ~[spring-beans-5.0.10.RELEASE.jar:5.0.10.RELEASE]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1062) ~[spring-beans-5.0.10.RELEASE.jar:5.0.10.RELEASE]
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:581) ~[spring-beans-5.0.10.RELEASE.jar:5.0.10.RELEASE]
    ... 30 common frames omitted
Caused by: java.lang.NumberFormatException: For input string: "8848}"
    at java.lang.NumberFormatException.forInputString(NumberFormatException.java:65) ~[na:1.8.0_201]
    at java.lang.Integer.parseInt(Integer.java:580) ~[na:1.8.0_201]
    at java.lang.Integer.parseInt(Integer.java:615) ~[na:1.8.0_201]
    at com.alibaba.dubbo.common.URL.valueOf(URL.java:239) ~[dubbo-2.6.5.jar:2.6.5]
    at com.alibaba.dubbo.common.utils.UrlUtils.parseURL(UrlUtils.java:68) ~[dubbo-2.6.5.jar:2.6.5]
    at com.alibaba.dubbo.common.utils.UrlUtils.parseURLs(UrlUtils.java:137) ~[dubbo-2.6.5.jar:2.6.5]
    at com.alibaba.dubbo.config.AbstractInterfaceConfig.loadRegistries(AbstractInterfaceConfig.java:191) ~[dubbo-2.6.5.jar:2.6.5]
    at com.alibaba.dubbo.config.ReferenceConfig.createProxy(ReferenceConfig.java:378) ~[dubbo-2.6.5.jar:2.6.5]
    at com.alibaba.dubbo.config.ReferenceConfig.init(ReferenceConfig.java:333) ~[dubbo-2.6.5.jar:2.6.5]
    at com.alibaba.dubbo.config.ReferenceConfig.get(ReferenceConfig.java:163) ~[dubbo-2.6.5.jar:2.6.5]
    at com.alibaba.dubbo.config.spring.ReferenceBean.getObject(ReferenceBean.java:67) ~[dubbo-2.6.5.jar:2.6.5]
    at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.doGetObjectFromFactoryBean(FactoryBeanRegistrySupport.java:171) ~[spring-beans-5.0.10.RELEASE.jar:5.0.10.RELEASE]
    ... 41 common frames omitted

花了整整一天时间，各种折腾，dubbo.xml 里面的占位符就是解析不了。


开始是以为是nacos的bug，后面以为是dubbo 的问题，最后才发现是spring-cloud-commons 的问题。我晕~~~~


开始是以为是bootstrap的问题，初始化dubbo.xml的时间太早了吗？ 坑爹啊！ 研究了下boostrap 和 application 配置文件的关系。无果。  后面认为是yml的格式的问题，后面把bootstrap.yml, 转换成了boostrap.properties, 结果问题依旧。想来想去，应该是xml解析的时候，bootstrap 还没有从nacos 成功获取数据的原因吧！ 写了个demo试了下，好像可以了， 再套到了原来的项目里面来， 熄火了！。 可是，这到底是什么情况，bootstrap配置文件的优先级是比较高的啊！ 网上一把搜索，未果，好像大家都没有遇到我这个问题。。。 后面干脆不用bootstrap配置文件，使用 application.yml/properties吧，可以了，但是nacos怎么办，不能不使用bootstrap啊！！

是ImportSource问题吗，它的解析有特殊之处， 研究其原理，无果？后面同事偶然发现，只要把dubbo.xml 分开为两个文件（一个文件有是基本信息，另外一个文件是 service/reference）就可以正常启动了， 然后继续研究，发现把 dubbo:reference 的id 属性去掉，就可以了。。 把原来的一个dubbo xml 分开了两个xml，两次ImportSource，另外还糅合导入了一个properties 就可以了，是顺序问题吗？ 难道是第一次不能解析，第二次才能解析吗？。。。必须要分开吗？折腾N久，无果。从GitHub拉下来几个demo（大名鼎鼎的didi哥的学习项目），运行一把，没问题的啊！！对比一下，然后一点点的加减代码和配置吧！ 发现didi哥的项目简单，所以无错，我把代码套过去，它的项目也会一样的报错了。

调试一下吧！ 断点设置在RegistryConfig的setAddress方法之上。看到其堆栈， 正常的是：
setAddress:118, RegistryConfig (com.alibaba.dubbo.config)
invoke0:-1, NativeMethodAccessorImpl (sun.reflect)
invoke:62, NativeMethodAccessorImpl (sun.reflect)
invoke:43, DelegatingMethodAccessorImpl (sun.reflect)
invoke:498, Method (java.lang.reflect)
setValue:332, BeanWrapperImpl$BeanPropertyHandler (org.springframework.beans)
processLocalProperty:458, AbstractNestablePropertyAccessor (org.springframework.beans)
setPropertyValue:278, AbstractNestablePropertyAccessor (org.springframework.beans)
setPropertyValue:266, AbstractNestablePropertyAccessor (org.springframework.beans)
setPropertyValues:97, AbstractPropertyAccessor (org.springframework.beans)
setPropertyValues:77, AbstractPropertyAccessor (org.springframework.beans)
applyPropertyValues:1635, AbstractAutowireCapableBeanFactory (org.springframework.beans.factory.support)
populateBean:1354, AbstractAutowireCapableBeanFactory (org.springframework.beans.factory.support)
doCreateBean:572, AbstractAutowireCapableBeanFactory (org.springframework.beans.factory.support)
createBean:495, AbstractAutowireCapableBeanFactory (org.springframework.beans.factory.support)
lambda$doGetBean$0:317, AbstractBeanFactory (org.springframework.beans.factory.support)
getObject:-1, 1089930529 (org.springframework.beans.factory.support.AbstractBeanFactory$$Lambda$136)
getSingleton:222, DefaultSingletonBeanRegistry (org.springframework.beans.factory.support)
doGetBean:315, AbstractBeanFactory (org.springframework.beans.factory.support)
getBean:199, AbstractBeanFactory (org.springframework.beans.factory.support)
preInstantiateSingletons:759, DefaultListableBeanFactory (org.springframework.beans.factory.support)
finishBeanFactoryInitialization:869, AbstractApplicationContext (org.springframework.context.support)
refresh:550, AbstractApplicationContext (org.springframework.context.support)
refresh:140, ServletWebServerApplicationContext (org.springframework.boot.web.servlet.context)
refresh:780, SpringApplication (org.springframework.boot)
refreshContext:412, SpringApplication (org.springframework.boot)
run:333, SpringApplication (org.springframework.boot)
run:1277, SpringApplication (org.springframework.boot)
run:1265, SpringApplication (org.springframework.boot)
main:24, TestApplication (com.didispace.alibaba.nacos.config.client)

异常情况的堆栈是：
setAddress:118, RegistryConfig (com.alibaba.dubbo.config)
invoke0:-1, NativeMethodAccessorImpl (sun.reflect)
invoke:62, NativeMethodAccessorImpl (sun.reflect)
invoke:43, DelegatingMethodAccessorImpl (sun.reflect)
invoke:498, Method (java.lang.reflect)
setValue:332, BeanWrapperImpl$BeanPropertyHandler (org.springframework.beans)
processLocalProperty:458, AbstractNestablePropertyAccessor (org.springframework.beans)
setPropertyValue:278, AbstractNestablePropertyAccessor (org.springframework.beans)
setPropertyValue:266, AbstractNestablePropertyAccessor (org.springframework.beans)
setPropertyValues:97, AbstractPropertyAccessor (org.springframework.beans)
setPropertyValues:77, AbstractPropertyAccessor (org.springframework.beans)
applyPropertyValues:1630, AbstractAutowireCapableBeanFactory (org.springframework.beans.factory.support)
populateBean:1349, AbstractAutowireCapableBeanFactory (org.springframework.beans.factory.support)
doCreateBean:572, AbstractAutowireCapableBeanFactory (org.springframework.beans.factory.support)
createBean:495, AbstractAutowireCapableBeanFactory (org.springframework.beans.factory.support)
lambda$doGetBean$0:317, AbstractBeanFactory (org.springframework.beans.factory.support)
getObject:-1, 1376017854 (org.springframework.beans.factory.support.AbstractBeanFactory$$Lambda$135)
getSingleton:222, DefaultSingletonBeanRegistry (org.springframework.beans.factory.support)
doGetBean:315, AbstractBeanFactory (org.springframework.beans.factory.support)
getBean:199, AbstractBeanFactory (org.springframework.beans.factory.support)
getBeansOfType:514, DefaultListableBeanFactory (org.springframework.beans.factory.support)
getBeansOfType:1204, AbstractApplicationContext (org.springframework.context.support)
beansOfTypeIncludingAncestors:327, BeanFactoryUtils (org.springframework.beans.factory)
afterPropertiesSet:140, ReferenceBean (com.alibaba.dubbo.config.spring)
invokeInitMethods:1753, AbstractAutowireCapableBeanFactory (org.springframework.beans.factory.support)
initializeBean:1690, AbstractAutowireCapableBeanFactory (org.springframework.beans.factory.support)
doCreateBean:573, AbstractAutowireCapableBeanFactory (org.springframework.beans.factory.support)
createBean:495, AbstractAutowireCapableBeanFactory (org.springframework.beans.factory.support)
lambda$doGetBean$0:317, AbstractBeanFactory (org.springframework.beans.factory.support)
getObject:-1, 1376017854 (org.springframework.beans.factory.support.AbstractBeanFactory$$Lambda$135)
getSingleton:222, DefaultSingletonBeanRegistry (org.springframework.beans.factory.support)
doGetBean:315, AbstractBeanFactory (org.springframework.beans.factory.support)
getTypeForFactoryBean:1513, AbstractBeanFactory (org.springframework.beans.factory.support)
getTypeForFactoryBean:838, AbstractAutowireCapableBeanFactory (org.springframework.beans.factory.support)
isTypeMatch:562, AbstractBeanFactory (org.springframework.beans.factory.support)
doGetBeanNamesForType:426, DefaultListableBeanFactory (org.springframework.beans.factory.support)
getBeanNamesForType:389, DefaultListableBeanFactory (org.springframework.beans.factory.support)
getBeanNamesForType:383, DefaultListableBeanFactory (org.springframework.beans.factory.support)
resolveNamedBean:996, DefaultListableBeanFactory (org.springframework.beans.factory.support)
getBean:338, DefaultListableBeanFactory (org.springframework.beans.factory.support)
getBean:333, DefaultListableBeanFactory (org.springframework.beans.factory.support)
isApplicable:163, RefreshAutoConfiguration$RefreshScopeBeanDefinitionEnhancer (org.springframework.cloud.autoconfigure)
postProcessBeanDefinitionRegistry:134, RefreshAutoConfiguration$RefreshScopeBeanDefinitionEnhancer (org.springframework.cloud.autoconfigure)
invokeBeanDefinitionRegistryPostProcessors:271, PostProcessorRegistrationDelegate (org.springframework.context.support)
invokeBeanFactoryPostProcessors:121, PostProcessorRegistrationDelegate (org.springframework.context.support)
invokeBeanFactoryPostProcessors:692, AbstractApplicationContext (org.springframework.context.support)
refresh:530, AbstractApplicationContext (org.springframework.context.support)
refresh:140, ServletWebServerApplicationContext (org.springframework.boot.web.servlet.context)
refresh:754, SpringApplication (org.springframework.boot)
refreshContext:386, SpringApplication (org.springframework.boot)
run:307, SpringApplication (org.springframework.boot)
main:48, TestNacosApplication (com.example.test_nacos)

一帧一帧的查看分析：

0 = "org.springframework.context.annotation.internalConfigurationAnnotationProcessor"
1 = "org.springframework.cloud.autoconfigure.RefreshAutoConfiguration$RefreshScopeBeanDefinitionEnhancer"
2 = "refreshScope"

难道是internalConfigurationAnnotationProcessor的问题？ 不像。发现RefreshAutoConfiguration 有些不对， 好像是RefreshAutoConfiguration 引起了这个问题？但是此时我依然不知道这就是RefreshAutoConfiguration的bug！（后面才知道） RefreshAutoConfiguration 为什么要这么做？不管了先， 那就把RefreshAutoConfiguration 停掉啊！ 观察到配置项：spring.cloud.refresh.enabled，这个好像没什么用。那把它设置为false，然后重启，然后就可以了！ 我擦，终于解决了问题！！不过，似乎高兴得太早了，引起的问题是， nacos的配置完全读取不到了！！ 这怎么行呢！

同事的配置拿来研究，调试发现它的堆栈更深了：

setAddress:118, RegistryConfig (com.alibaba.dubbo.config)
invoke0:-1, NativeMethodAccessorImpl (sun.reflect)
invoke:62, NativeMethodAccessorImpl (sun.reflect)
invoke:43, DelegatingMethodAccessorImpl (sun.reflect)
invoke:498, Method (java.lang.reflect)
setValue:332, BeanWrapperImpl$BeanPropertyHandler (org.springframework.beans)
processLocalProperty:458, AbstractNestablePropertyAccessor (org.springframework.beans)
setPropertyValue:278, AbstractNestablePropertyAccessor (org.springframework.beans)
setPropertyValue:266, AbstractNestablePropertyAccessor (org.springframework.beans)
setPropertyValues:97, AbstractPropertyAccessor (org.springframework.beans)
setPropertyValues:77, AbstractPropertyAccessor (org.springframework.beans)
applyPropertyValues:1630, AbstractAutowireCapableBeanFactory (org.springframework.beans.factory.support)
populateBean:1349, AbstractAutowireCapableBeanFactory (org.springframework.beans.factory.support)
doCreateBean:572, AbstractAutowireCapableBeanFactory (org.springframework.beans.factory.support)
createBean:495, AbstractAutowireCapableBeanFactory (org.springframework.beans.factory.support)
lambda$doGetBean$0:317, AbstractBeanFactory (org.springframework.beans.factory.support)
getObject:-1, 26928827 (org.springframework.beans.factory.support.AbstractBeanFactory$$Lambda$135)
getSingleton:222, DefaultSingletonBeanRegistry (org.springframework.beans.factory.support)
doGetBean:315, AbstractBeanFactory (org.springframework.beans.factory.support)
getBean:199, AbstractBeanFactory (org.springframework.beans.factory.support)
getBeansOfType:514, DefaultListableBeanFactory (org.springframework.beans.factory.support)
getBeansOfType:1204, AbstractApplicationContext (org.springframework.context.support)
beansOfTypeIncludingAncestors:327, BeanFactoryUtils (org.springframework.beans.factory)
afterPropertiesSet:140, ReferenceBean (com.alibaba.dubbo.config.spring)
invokeInitMethods:1753, AbstractAutowireCapableBeanFactory (org.springframework.beans.factory.support)
initializeBean:1690, AbstractAutowireCapableBeanFactory (org.springframework.beans.factory.support)
doCreateBean:573, AbstractAutowireCapableBeanFactory (org.springframework.beans.factory.support)
createBean:495, AbstractAutowireCapableBeanFactory (org.springframework.beans.factory.support)
lambda$doGetBean$0:317, AbstractBeanFactory (org.springframework.beans.factory.support)
getObject:-1, 26928827 (org.springframework.beans.factory.support.AbstractBeanFactory$$Lambda$135)
getSingleton:222, DefaultSingletonBeanRegistry (org.springframework.beans.factory.support)
doGetBean:315, AbstractBeanFactory (org.springframework.beans.factory.support)
getTypeForFactoryBean:1513, AbstractBeanFactory (org.springframework.beans.factory.support)
getTypeForFactoryBean:838, AbstractAutowireCapableBeanFactory (org.springframework.beans.factory.support)
isTypeMatch:562, AbstractBeanFactory (org.springframework.beans.factory.support)
doGetBeanNamesForType:426, DefaultListableBeanFactory (org.springframework.beans.factory.support)
getBeanNamesForType:389, DefaultListableBeanFactory (org.springframework.beans.factory.support)
beanNamesForTypeIncludingAncestors:214, BeanFactoryUtils (org.springframework.beans.factory)
findAutowireCandidates:1273, DefaultListableBeanFactory (org.springframework.beans.factory.support)
doResolveDependency:1098, DefaultListableBeanFactory (org.springframework.beans.factory.support)
resolveDependency:1062, DefaultListableBeanFactory (org.springframework.beans.factory.support)
resolveAutowiredArgument:819, ConstructorResolver (org.springframework.beans.factory.support)
createArgumentArray:725, ConstructorResolver (org.springframework.beans.factory.support)
instantiateUsingFactoryMethod:475, ConstructorResolver (org.springframework.beans.factory.support)
instantiateUsingFactoryMethod:1246, AbstractAutowireCapableBeanFactory (org.springframework.beans.factory.support)
createBeanInstance:1096, AbstractAutowireCapableBeanFactory (org.springframework.beans.factory.support)
doCreateBean:535, AbstractAutowireCapableBeanFactory (org.springframework.beans.factory.support)
createBean:495, AbstractAutowireCapableBeanFactory (org.springframework.beans.factory.support)
lambda$doGetBean$0:317, AbstractBeanFactory (org.springframework.beans.factory.support)
getObject:-1, 26928827 (org.springframework.beans.factory.support.AbstractBeanFactory$$Lambda$135)
getSingleton:222, DefaultSingletonBeanRegistry (org.springframework.beans.factory.support)
doGetBean:315, AbstractBeanFactory (org.springframework.beans.factory.support)
getBean:204, AbstractBeanFactory (org.springframework.beans.factory.support)
registerBeanPostProcessors:224, PostProcessorRegistrationDelegate (org.springframework.context.support)
registerBeanPostProcessors:708, AbstractApplicationContext (org.springframework.context.support)
refresh:533, AbstractApplicationContext (org.springframework.context.support)
refresh:140, ServletWebServerApplicationContext (org.springframework.boot.web.servlet.context)
refresh:754, SpringApplication (org.springframework.boot)
refreshContext:386, SpringApplication (org.springframework.boot)
run:307, SpringApplication (org.springframework.boot)
main:64, DiscussApplication (com.llk.ppm.discuss)
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