将Thingsboard从2.2.0升级到2.3.0后，服务无法启动，日志中会显示以下错误消息。
2019-02-14 10：16：23,996 [main]错误o.s.boot.SpringApplication - 应用程序启动失败org.springframework.beans.factory.BeanCreationException：创建名为'baseRuleChainTransactionService'的bean时出错：注册自动连接的依赖项失败;嵌套异常是java.lang.IllegalArgumentException：无法在org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor中解析字符串值“$ {actors.rule.transaction.queue_size}”中的占位符'actors.rule.transaction.queue_size'。 postProcessPropertyValues（AutowiredAnnotationBeanPostProcessor.java：376）org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean（AbstractAutowireCapableBeanFactory.java:1219）org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean（AbstractAutowireCapableBeanFactory.java:551）在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482）org.springframework.beans.factory.support.AbstractBeanFactory $ 1.getObject（AbstractBeanFactory.java:306）org.springframework.beans。 org.springfram上的factory.support.DefaultSingletonBeanRegistry.getSingleton（DefaultSingletonBeanRegistry.java:230） ework.beans.factory.support.AbstractBeanFactory.doGetBean（AbstractBeanFactory.java:302）位于org.springframework.beans.factory.support的org.springframework.beans.factory.support.AbstractBeanFactory.getBean（AbstractBeanFactory.java:197）。位于org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization（AbstractApplicationContext.java:866）的org.springframework.context.support.AbstractApplicationContext.refresh（AbstractApplicationContext.java:542）中的DefaultListableBeanFactory.preInstantiateSingletons（DefaultListableBeanFactory.java:754） .springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh（EmbeddedWebApplicationContext.java:122）org.springframework.boot.SpringApplication.refresh（SpringApplication.java:761）org.springframework.boot.SpringApplication.refreshContext（SpringApplication.java） ：371）org.springframework.boot.SpringApplication.run（SpringApplication.java:315）org.springframework.boot.SpringApplication.run（SpringA） pp.java:1186）org.springframework.boot.SpringApplication.run（SpringApplication.java:1175）atg.thingsboard.server.ThingsboardServerApplication.main（ThingsboardServerApplication.java:38）at sun.reflect.NativeMethodAccessorImpl.invoke0（Native方法）at sun.reflect.NativeMethodAccessorImpl.invoke（NativeMethodAccessorImpl.java:62）at sun.reflect.DelegatingMethodAccessorImpl.invoke（DelegatingMethodAccessorImpl.java:43）at java.lang.reflect.Method.invoke（Method.java:498）at at Org.springframework.boot.loader.MainMethodRunner.run（MainMethodRunner.java:48）org.springframework.boot.loader.Launcher.launch（Launcher.java:87）org.springframework.boot.loader.Launcher.launch（ Launcher.java:50）at org.springframework.boot.loader.PropertiesLauncher.main（PropertiesLauncher.java:521）引起：java.lang.IllegalArgumentException：无法在字符串值中解析占位符'actors.rule.transaction.queue_size' org.springframework.util.PropertyPl上的“$ {actors.rule.transaction.queue_size}”位于org.springframework的org.springframework.util.PropertyPlaceholderHelper.replacePlaceholders（PropertyPlaceholderHelper.java:126）org.springframework.core.env.AbstractPropertyResolver.doResolvePlaceholders（AbstractPropertyResolver.java:219）的aceholderHelper.parseStringValue（PropertyPlaceholderHelper.java:174） .core.env.AbstractPropertyResolver.resolveRequiredPlaceholders（AbstractPropertyResolver.java:193）org.springframework.context.support.PropertySourcesPlaceholderConfigurer $ 2.resolveStringValue（PropertySourcesPlaceholderConfigurer.java:172）org.springframework.beans.factory.support.AbstractBeanFactory.resolveEmbeddedValue（ AbstractBeanFactory.java:813）org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency（DefaultListableBeanFactory.java:1079）org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency（DefaultListableBeanFactory.java:1059）at org .springframework.beans.factory.annotation.AutowiredAnnotationBe anPostProcessor $ AutowiredFieldElement.inject（AutowiredAnnotationBeanPostProcessor.java:589）org.springframework.beans.factory.anject.InjectionMetadata.inject（InjectionMetadata.java:88）at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues（AutowiredAnnotationBeanPostProcessor。 java：370）...省略了25个常用帧
您需要更新thingsboard.yml配置文件以添加actors.rule.transaction.queue_size键。