springboot升級到2.6.x和2.7.x 相容hystrix

一、pom.xml需要引入的依賴二、項目開啟熔斷器開關 2.1 註解方式 2.2 xml方式三、依賴類缺失問題四、版本匹配安全檢查問題五、測試驗證六、結論一、pom.xml需要引入的依賴 pom.xml  ...

一、pom.xml需要引入的依賴
二、項目開啟熔斷器開關
　　2.1 註解方式
　　2.2 xml方式
三、依賴類缺失問題
四、版本匹配安全檢查問題
五、測試驗證
六、結論

一、pom.xml需要引入的依賴

pom.xml

 <!-- springboot升級到2.6.7，同樣適用於2.7.0，2.7.18等 -->
   <parent>
       <groupId>org.springframework.boot</groupId>
       <artifactId>spring-boot-starter-parent</artifactId>
       <version>2.6.7</version>
       <relativePath/> <!-- lookup parent from repository -->
   </parent>  
        
     <!-- hystrix需要升級到2.x以上版本 -->
       <dependency>
           <groupId>org.springframework.cloud</groupId>
           <artifactId>spring-cloud-starter-netflix-hystrix</artifactId>
           <version>2.2.10.RELEASE</version>
      </dependency>
 
    <!-- 升級後運行時缺失依賴 -->
     <dependency>
       <groupId>org.hdrhistogram</groupId>
       <artifactId>HdrHistogram</artifactId>
       <version>2.1.12</version>
     </dependency>

二、項目開啟熔斷器開關

2.1 註解方式

@EnableHystrix

@EnableCircuitBreaker

註：項目啟動類中加上以上註解，以上兩者取其一即可；

2.2 xml方式

以上註解方式底層就是實例化此類：

三、依賴類缺失問題

此時運行項目將報以下錯誤：

errpr.log

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IDEA 2021.3\lib\idea_rt.jar" com.example.springbootdame.PersonalAssistantApplication
Connected to the target VM, address: '127.0.0.1:55698', transport: 'socket'
2024-01-16 15:44:01.575 [al-service] [main] WARN  [org.springframework.context.annotation.AnnotationConfigApplicationContext] -Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'configurationPropertiesBeans' defined in class path resource [org/springframework/cloud/autoconfigure/ConfigurationPropertiesRebinderAutoConfiguration.class]: Post-processing of merged bean definition failed; nested exception is java.lang.IllegalStateException: Failed to introspect Class [org.springframework.cloud.context.properties.ConfigurationPropertiesBeans] from ClassLoader [sun.misc.Launcher$AppClassLoader@18b4aac2]
2024-01-16 15:44:01.581 [al-service] [main] INFO  [org.springframework.boot.autoconfigure.logging.ConditionEvaluationReportLoggingListener] -
 
Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2024-01-16 15:44:01.603 [al-service] [main] ERROR [org.springframework.boot.SpringApplication] -Application run failed
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'configurationPropertiesBeans' defined in class path resource [org/springframework/cloud/autoconfigure/ConfigurationPropertiesRebinderAutoConfiguration.class]: Post-processing of merged bean definition failed; nested exception is java.lang.IllegalStateException: Failed to introspect Class [org.springframework.cloud.context.properties.ConfigurationPropertiesBeans] from ClassLoader [sun.misc.Launcher$AppClassLoader@18b4aac2]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:597)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:542)
    at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:213)
    at org.springframework.context.support.PostProcessorRegistrationDelegate.registerBeanPostProcessors(PostProcessorRegistrationDelegate.java:270)
    at org.springframework.context.support.AbstractApplicationContext.registerBeanPostProcessors(AbstractApplicationContext.java:762)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:567)
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:740)
    at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:415)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:303)
    at org.springframework.boot.builder.SpringApplicationBuilder.run(SpringApplicationBuilder.java:164)
    at org.springframework.cloud.bootstrap.BootstrapApplicationListener.bootstrapServiceContext(BootstrapApplicationListener.java:212)
    at org.springframework.cloud.bootstrap.BootstrapApplicationListener.onApplicationEvent(BootstrapApplicationListener.java:117)
    at org.springframework.cloud.bootstrap.BootstrapApplicationListener.onApplicationEvent(BootstrapApplicationListener.java:74)
    at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:176)
    at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:169)
    at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:143)
    at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:131)
    at org.springframework.boot.context.event.EventPublishingRunListener.environmentPrepared(EventPublishingRunListener.java:85)
    at org.springframework.boot.SpringApplicationRunListeners.lambda$environmentPrepared$2(SpringApplicationRunListeners.java:66)
    at java.util.ArrayList.forEach(ArrayList.java:1257)
    at org.springframework.boot.SpringApplicationRunListeners.doWithListeners(SpringApplicationRunListeners.java:120)
    at org.springframework.boot.SpringApplicationRunListeners.doWithListeners(SpringApplicationRunListeners.java:114)
    at org.springframework.boot.SpringApplicationRunListeners.environmentPrepared(SpringApplicationRunListeners.java:65)
    at org.springframework.boot.SpringApplication.prepareEnvironment(SpringApplication.java:339)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:297)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1312)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1301)
    at com.example.springbootdame.PersonalAssistantApplication.main(PersonalAssistantApplication.java:12)
Caused by: java.lang.IllegalStateException: Failed to introspect Class [org.springframework.cloud.context.properties.ConfigurationPropertiesBeans] from ClassLoader [sun.misc.Launcher$AppClassLoader@18b4aac2]
    at org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:485)
    at org.springframework.util.ReflectionUtils.doWithLocalMethods(ReflectionUtils.java:321)
    at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.buildLifecycleMetadata(InitDestroyAnnotationBeanPostProcessor.java:232)
    at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.findLifecycleMetadata(InitDestroyAnnotationBeanPostProcessor.java:210)
    at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessMergedBeanDefinition(InitDestroyAnnotationBeanPostProcessor.java:149)
    at org.springframework.context.annotation.CommonAnnotationBeanPostProcessor.postProcessMergedBeanDefinition(CommonAnnotationBeanPostProcessor.java:305)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyMergedBeanDefinitionPostProcessors(AbstractAutowireCapableBeanFactory.java:1116)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:594)
    ... 30 common frames omitted
Caused by: java.lang.NoClassDefFoundError: org/springframework/boot/context/properties/ConfigurationBeanFactoryMetadata
    at java.lang.Class.getDeclaredMethods0(Native Method)
    at java.lang.Class.privateGetDeclaredMethods(Class.java:2701)
    at java.lang.Class.getDeclaredMethods(Class.java:1975)
    at org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:467)
    ... 37 common frames omitted
Caused by: java.lang.ClassNotFoundException: org.springframework.boot.context.properties.ConfigurationBeanFactoryMetadata
    at java.net.URLClassLoader.findClass(URLClassLoader.java:382)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    ... 41 common frames omitted
2024-01-16 15:44:01.606 [al-service] [main] ERROR [org.springframework.boot.SpringApplication] -Application run failed
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'configurationPropertiesBeans' defined in class path resource [org/springframework/cloud/autoconfigure/ConfigurationPropertiesRebinderAutoConfiguration.class]: Post-processing of merged bean definition failed; nested exception is java.lang.IllegalStateException: Failed to introspect Class [org.springframework.cloud.context.properties.ConfigurationPropertiesBeans] from ClassLoader [sun.misc.Launcher$AppClassLoader@18b4aac2]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:597)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:542)
    at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:213)
    at org.springframework.context.support.PostProcessorRegistrationDelegate.registerBeanPostProcessors(PostProcessorRegistrationDelegate.java:270)
    at org.springframework.context.support.AbstractApplicationContext.registerBeanPostProcessors(AbstractApplicationContext.java:762)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:567)
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:740)
    at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:415)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:303)
    at org.springframework.boot.builder.SpringApplicationBuilder.run(SpringApplicationBuilder.java:164)
    at org.springframework.cloud.bootstrap.BootstrapApplicationListener.bootstrapServiceContext(BootstrapApplicationListener.java:212)
    at org.springframework.cloud.bootstrap.BootstrapApplicationListener.onApplicationEvent(BootstrapApplicationListener.java:117)
    at org.springframework.cloud.bootstrap.BootstrapApplicationListener.onApplicationEvent(BootstrapApplicationListener.java:74)
    at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:176)
    at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:169)
    at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:143)
    at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:131)
    at org.springframework.boot.context.event.EventPublishingRunListener.environmentPrepared(EventPublishingRunListener.java:85)
    at org.springframework.boot.SpringApplicationRunListeners.lambda$environmentPrepared$2(SpringApplicationRunListeners.java:66)
    at java.util.ArrayList.forEach(ArrayList.java:1257)
    at org.springframework.boot.SpringApplicationRunListeners.doWithListeners(SpringApplicationRunListeners.java:120)
    at org.springframework.boot.SpringApplicationRunListeners.doWithListeners(SpringApplicationRunListeners.java:114)
    at org.springframework.boot.SpringApplicationRunListeners.environmentPrepared(SpringApplicationRunListeners.java:65)
    at org.springframework.boot.SpringApplication.prepareEnvironment(SpringApplication.java:339)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:297)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1312)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1301)
    at com.example.springbootdame.PersonalAssistantApplication.main(PersonalAssistantApplication.java:12)
Caused by: java.lang.IllegalStateException: Failed to introspect Class [org.springframework.cloud.context.properties.ConfigurationPropertiesBeans] from ClassLoader [sun.misc.Launcher$AppClassLoader@18b4aac2]
    at org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:485)
    at org.springframework.util.ReflectionUtils.doWithLocalMethods(ReflectionUtils.java:321)
    at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.buildLifecycleMetadata(InitDestroyAnnotationBeanPostProcessor.java:232)
    at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.findLifecycleMetadata(InitDestroyAnnotationBeanPostProcessor.java:210)
    at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessMergedBeanDefinition(InitDestroyAnnotationBeanPostProcessor.java:149)
    at org.springframework.context.annotation.CommonAnnotationBeanPostProcessor.postProcessMergedBeanDefinition(CommonAnnotationBeanPostProcessor.java:305)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyMergedBeanDefinitionPostProcessors(AbstractAutowireCapableBeanFactory.java:1116)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:594)
    ... 30 common frames omitted
Caused by: java.lang.NoClassDefFoundError: org/springframework/boot/context/properties/ConfigurationBeanFactoryMetadata
    at java.lang.Class.getDeclaredMethods0(Native Method)
    at java.lang.Class.privateGetDeclaredMethods(Class.java:2701)
    at java.lang.Class.getDeclaredMethods(Class.java:1975)
    at org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:467)
    ... 37 common frames omitted
Caused by: java.lang.ClassNotFoundException: org.springframework.boot.context.properties.ConfigurationBeanFactoryMetadata
    at java.net.URLClassLoader.findClass(URLClassLoader.java:382)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    ... 41 common frames omitted
Disconnected from the target VM, address: '127.0.0.1:55698', transport: 'socket'
 
Process finished with exit code 1

報錯原因是缺失特定路徑下的類org.springframework.boot.context.properties.ConfigurationBeanFactoryMetadata，如下所示:

需要解決此問題，自定義此類即可,註意一定要定義成框架所需的包路徑（package org.springframework.boot.context.properties;）：

ConfigurationBeanFactoryMetadata.java

 package org.springframework.boot.context.properties;
 
import org.springframework.beans.BeansException;
import org.springframework.beans.factory.config.BeanDefinition;
import org.springframework.beans.factory.config.BeanFactoryPostProcessor;
import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;
import org.springframework.beans.factory.support.BeanDefinitionRegistry;
import org.springframework.beans.factory.support.GenericBeanDefinition;
import org.springframework.beans.factory.support.RootBeanDefinition;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.context.ConfigurableApplicationContext;
import org.springframework.core.annotation.AnnotationUtils;
import org.springframework.util.ClassUtils;
import org.springframework.util.ReflectionUtils;
 
import java.lang.annotation.Annotation;
import java.lang.reflect.Method;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.atomic.AtomicReference;
 
/**
 * @Author: mingming.chen
 * @Date: 2024/1/15 14 26
 * @Description:
 **/
public class ConfigurationBeanFactoryMetadata implements BeanFactoryPostProcessor {
 
    private ConfigurableListableBeanFactory beanFactory;
 
    private Map<String, MetaData> beans = new HashMap<String, MetaData>();
 
    @Override
    public void postProcessBeanFactory(ConfigurableListableBeanFactory beanFactory)
            throws BeansException {
        this.beanFactory = beanFactory;
        for (String name : beanFactory.getBeanDefinitionNames()) {
            BeanDefinition definition = beanFactory.getBeanDefinition(name);
            String method = definition.getFactoryMethodName();
            String bean = definition.getFactoryBeanName();
            if (method != null && bean != null) {
                this.beans.put(name, new MetaData(bean, method));
            }
        }
    }
 
    public <A extends Annotation> Map<String, Object> getBeansWithFactoryAnnotation(
            Class<A> type) {
        Map<String, Object> result = new HashMap<String, Object>();
        for (String name : this.beans.keySet()) {
            if (findFactoryAnnotation(name, type) != null) {
                result.put(name, this.beanFactory.getBean(name));
            }
        }
        return result;
    }
 
    public <A extends Annotation> A findFactoryAnnotation(String beanName,
                                                          Class<A> type) {
        Method method = findFactoryMethod(beanName);
        return (method == null ? null : AnnotationUtils.findAnnotation(method, type));
    }
 
    private Method findFactoryMethod(String beanName) {
        if (!this.beans.containsKey(beanName)) {
            return null;
        }
        final AtomicReference<Method> found = new AtomicReference<Method>(null);
        MetaData meta = this.beans.get(beanName);
        final String factory = meta.getMethod();
        Class<?> type = this.beanFactory.getType(meta.getBean());
        ReflectionUtils.doWithMethods(type, new ReflectionUtils.MethodCallback() {
            @Override
            public void doWith(Method method)
                    throws IllegalArgumentException, IllegalAccessException {
                if (method.getName().equals(factory)) {
                    found.compareAndSet(null, method);
                }
            }
        });
        return found.get();
    }
 
    private static class MetaData {
 
        private String bean;
 
        private String method;
 
        MetaData(String bean, String method) {
            this.bean = bean;
            this.method = method;
        }
 
        public String getBean() {
            return this.bean;
        }
 
        public String getMethod() {
            return this.method;
        }
    }
}

四、版本匹配安全檢查問題

此時，同樣啟動項目，報以下錯誤，並中斷進程：

如上所示，由於spring-cloud-starter-netflix-hystrix 2021年後不更新，此依賴包對應的springCloud版本和springboot版本不匹配，會報版本不匹配異常，需要禁用安全檢查功能，如下配置在application.yml文件中：

spring:
  cloud:
    compatibility-verifier:
       enabled: false

檢查配置說明：

相容性驗證器是Spring Cloud框架中的一個功能，用於確保所使用的Spring Boot版本與Spring Cloud版本相容。當Spring Boot版本與Spring Cloud版本不相容時，可能會導致應用程式在運行時出現問題。

在上述代碼中，cloud.compatibility-verifier.enabled屬性被設置為false，意味著禁用了相容性驗證器。這意味著應用程式將不再執行Spring Boot與Spring Cloud版本的相容性檢查。

禁用相容性驗證器可能會導致以下問題：

不相容的Spring Boot和Spring Cloud版本可能導致應用程式在運行時出現錯誤或異常。
可能會錯過一些Spring Cloud提供的新功能或修複的問題。

因此，在禁用相容性驗證器之前，應該確保所使用的Spring Boot版本與Spring Cloud版本相容，並且瞭解可能的風險和影響。

五、測試驗證

熔斷；
降級；
線程池隔離：併發數超過設置線程池個數請求進行降級；

六、結論

完成以上前四步即可在springboot2.6.x和2.7.x使用hystrix組件。