Springboot Retry组件@Recover失效问题怎么解决

这篇文章主要介绍"Springboot Retry组件@Recover失效问题怎么解决"，在日常操作中，相信很多人在Springboot Retry组件@Recover失效问题怎么解决问题上存在疑惑，小编查阅了各式资料，整理出简单好用的操作方法，希望对大家解答"Springboot Retry组件@Recover失效问题怎么解决"的疑惑有所帮助！接下来，请跟着小编一起来学习吧！

背景

在使用springboot的retry模块时，你是否出现过@Recover注解失效的问题呢？下面我会对该问题进行复现，并且简要的说下解决方法。

问题复现

首先我们引入maven

            org.springframework.retry            spring-retry                            org.aspectj            aspectjweaver            1.9.6                            cn.hutool            hutool-all            5.5.2                            org.projectlombok            lombok            true                            org.springframework.boot            spring-boot-starter-test            test                            org.springframework.boot            spring-boot-starter-web        

主类配置EnableRetry注解

package ai.guiji.csdn; import org.springframework.boot.SpringApplication;import org.springframework.boot.autoconfigure.SpringBootApplication;import org.springframework.retry.annotation.EnableRetry; @EnableRetry@SpringBootApplicationpublic class CsdnApplication {   public static void main(String[] args) {    SpringApplication.run(CsdnApplication.class, args);  }}

准备测试的Retry组件类代码

package ai.guiji.csdn.component; import lombok.extern.slf4j.Slf4j;import org.springframework.retry.annotation.Backoff;import org.springframework.retry.annotation.Recover;import org.springframework.retry.annotation.Retryable;import org.springframework.stereotype.Component; import java.util.function.Supplier; /** @Author 剑客阿良_ALiang @Date 2021/4/22 16:07 @Description: 重试工具 */@Slf4j@Componentpublic class RetryUtil {  @Retryable(      value = Exception.class,      maxAttempts = 3,      backoff = @Backoff(delay = 5000, multiplier = 1.5))  public String retry(Supplier supplier) throws Exception {    String result = null;    try {      result = supplier.get();    } catch (Exception exception) {      log.error("异常报错:{}", exception.getMessage());      throw exception;    }    return result;  }   @Recover  public void recover(Exception e) {    log.error("调用超过3次异常");  }}

代码说明

1、我们可以看到retry方法会重试supplier的get结果，捕获异常并抛出异常。这里抛出后会被retry捕获并且重试。

2、maxAttempts参数为重试的最大次数。

3、backoff中的delay为两次重试之间的延迟，multiplier为重试阻尼，可以这么理解，每次重试间隔时间为上一次重试间隔时间的倍数。

4、如果3次重试均抛出异常，则进入recover方法。

编写测试代码

package ai.guiji.csdn.component; import cn.hutool.core.convert.Convert;import cn.hutool.http.HttpUtil;import org.junit.jupiter.api.Test;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.boot.test.context.SpringBootTest; /** @Author 剑客阿良_ALaing @Date 2021/11/30 13:08 @Description: */@SpringBootTestclass RetryUtilTest {  @Autowired private RetryUtil retryUtil;   @Test  void retry() {    try {      System.out.println(Convert.toStr(retryUtil.retry(() -> HttpUtil.post("xxxx", "")), "haha"));    } catch (Exception exception) {      exception.printStackTrace();    }  }}

执行测试结果

2021-11-30 13:37:44.012 ERROR 13600 --- [           main] ai.guiji.csdn.component.RetryUtil        : 异常报错:UnknownHostException: xxxx2021-11-30 13:37:49.019 ERROR 13600 --- [           main] ai.guiji.csdn.component.RetryUtil        : 异常报错:UnknownHostException: xxxx2021-11-30 13:37:58.787 ERROR 13600 --- [           main] ai.guiji.csdn.component.RetryUtil        : 异常报错:UnknownHostException: xxxxorg.springframework.retry.ExhaustedRetryException: Cannot locate recovery method; nested exception is cn.hutool.core.io.IORuntimeException: UnknownHostException: xxxx        at org.springframework.retry.annotation.RecoverAnnotationRecoveryHandler.recover(RecoverAnnotationRecoveryHandler.java:70)        at org.springframework.retry.interceptor.RetryOperationsInterceptor$ItemRecovererCallback.recover(RetryOperationsInterceptor.java:142)        at org.springframework.retry.support.RetryTemplate.handleRetryExhausted(RetryTemplate.java:539)        at org.springframework.retry.support.RetryTemplate.doExecute(RetryTemplate.java:387)        at org.springframework.retry.support.RetryTemplate.execute(RetryTemplate.java:225)        at org.springframework.retry.interceptor.RetryOperationsInterceptor.invoke(RetryOperationsInterceptor.java:116)        at org.springframework.retry.annotation.AnnotationAwareRetryOperationsInterceptor.invoke(AnnotationAwareRetryOperationsInterceptor.java:163)        at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)        at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:750)        at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:692)        at ai.guiji.csdn.component.RetryUtil$$EnhancerBySpringCGLIB$$d209cbc6.retry()        at ai.guiji.csdn.component.RetryUtilTest.retry(RetryUtilTest.java:17)        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)        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 org.junit.platform.commons.util.ReflectionUtils.invokeMethod(ReflectionUtils.java:688)        at org.junit.jupiter.engine.execution.MethodInvocation.proceed(MethodInvocation.java:60)        at org.junit.jupiter.engine.execution.InvocationInterceptorChain$ValidatingInvocation.proceed(InvocationInterceptorChain.java:131)        at org.junit.jupiter.engine.extension.TimeoutExtension.intercept(TimeoutExtension.java:149)        at org.junit.jupiter.engine.extension.TimeoutExtension.interceptTestableMethod(TimeoutExtension.java:140)        at org.junit.jupiter.engine.extension.TimeoutExtension.interceptTestMethod(TimeoutExtension.java:84)        at org.junit.jupiter.engine.execution.ExecutableInvoker$ReflectiveInterceptorCall.lambda$ofVoidMethod$0(ExecutableInvoker.java:115)        at org.junit.jupiter.engine.execution.ExecutableInvoker.lambda$invoke$0(ExecutableInvoker.java:105)        at org.junit.jupiter.engine.execution.InvocationInterceptorChain$InterceptedInvocation.proceed(InvocationInterceptorChain.java:106)        at org.junit.jupiter.engine.execution.InvocationInterceptorChain.proceed(InvocationInterceptorChain.java:64)        at org.junit.jupiter.engine.execution.InvocationInterceptorChain.chainAndInvoke(InvocationInterceptorChain.java:45)        at org.junit.jupiter.engine.execution.InvocationInterceptorChain.invoke(InvocationInterceptorChain.java:37)        at org.junit.jupiter.engine.execution.ExecutableInvoker.invoke(ExecutableInvoker.java:104)        at org.junit.jupiter.engine.execution.ExecutableInvoker.invoke(ExecutableInvoker.java:98)        at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.lambda$invokeTestMethod$6(TestMethodTestDescriptor.java:210)        at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)        at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.invokeTestMethod(TestMethodTestDescriptor.java:206)        at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute(TestMethodTestDescriptor.java:131)        at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute(TestMethodTestDescriptor.java:65)        at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$5(NodeTestTask.java:139)        at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)        at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$7(NodeTestTask.java:129)        at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:137)        at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:127)        at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)        at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:126)        at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:84)        at java.util.ArrayList.forEach(ArrayList.java:1257)        at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:38)        at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$5(NodeTestTask.java:143)        at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)        at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$7(NodeTestTask.java:129)        at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:137)        at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:127)        at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)        at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:126)        at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:84)        at java.util.ArrayList.forEach(ArrayList.java:1257)        at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:38)        at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$5(NodeTestTask.java:143)        at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)        at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$7(NodeTestTask.java:129)        at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:137)        at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:127)        at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)        at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:126)        at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:84)        at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.submit(SameThreadHierarchicalTestExecutorService.java:32)        at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.execute(HierarchicalTestExecutor.java:57)        at org.junit.platform.engine.support.hierarchical.HierarchicalTestEngine.execute(HierarchicalTestEngine.java:51)        at org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute(EngineExecutionOrchestrator.java:108)        at org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute(EngineExecutionOrchestrator.java:88)        at org.junit.platform.launcher.core.EngineExecutionOrchestrator.lambda$execute$0(EngineExecutionOrchestrator.java:54)        at org.junit.platform.launcher.core.EngineExecutionOrchestrator.withInterceptedStreams(EngineExecutionOrchestrator.java:67)        at org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute(EngineExecutionOrchestrator.java:52)        at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:96)        at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:75)        at com.intellij.junit5.JUnit5IdeaTestRunner.startRunnerWithArgs(JUnit5IdeaTestRunner.java:69)        at com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:33)        at com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:230)        at com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:58)Caused by: cn.hutool.core.io.IORuntimeException: UnknownHostException: xxxx        at cn.hutool.http.HttpRequest.send(HttpRequest.java:1153)        at cn.hutool.http.HttpRequest.execute(HttpRequest.java:969)        at cn.hutool.http.HttpRequest.execute(HttpRequest.java:940)        at cn.hutool.http.HttpUtil.post(HttpUtil.java:216)        at cn.hutool.http.HttpUtil.post(HttpUtil.java:197)        at ai.guiji.csdn.component.RetryUtilTest.lambda$retry$0(RetryUtilTest.java:17)        at ai.guiji.csdn.component.RetryUtil.retry(RetryUtil.java:22)        at ai.guiji.csdn.component.RetryUtil$$FastClassBySpringCGLIB$$a565f63f.invoke()        at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:218)        at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:779)        at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163)        at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:750)        at org.springframework.retry.interceptor.RetryOperationsInterceptor$1.doWithRetry(RetryOperationsInterceptor.java:93)        at org.springframework.retry.support.RetryTemplate.doExecute(RetryTemplate.java:329)        ... 73 moreCaused by: java.net.UnknownHostException: xxxx        at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:184)        at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172)        at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)        at java.net.Socket.connect(Socket.java:589)        at java.net.Socket.connect(Socket.java:538)        at sun.net.NetworkClient.doConnect(NetworkClient.java:180)        at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)        at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)        at sun.net.www.http.HttpClient.(HttpClient.java:242)        at sun.net.www.http.HttpClient.New(HttpClient.java:339)        at sun.net.www.http.HttpClient.New(HttpClient.java:357)        at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)        at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)        at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)        at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)        at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)        at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)        at cn.hutool.http.HttpConnection.getOutputStream(HttpConnection.java:451)        at cn.hutool.http.HttpRequest.sendFormUrlEncoded(HttpRequest.java:1176)        at cn.hutool.http.HttpRequest.send(HttpRequest.java:1145)        ... 86 more  Process finished with exit code 0

并没有进入recover方法，注解未触发。

问题解决

这里有个很容易忽视的点，就是retry方法是有返回值的，所以recover方法也必须是相同类型带返回值的方法。所以要把recover方法改一下。

package ai.guiji.csdn.component; import lombok.extern.slf4j.Slf4j;import org.springframework.retry.annotation.Backoff;import org.springframework.retry.annotation.Recover;import org.springframework.retry.annotation.Retryable;import org.springframework.stereotype.Component; import java.util.function.Supplier; /** @Author 剑客阿良_ALiang @Date 2021/4/22 16:07 @Description: 重试工具 */@Slf4j@Componentpublic class RetryUtil {  @Retryable(      value = Exception.class,      maxAttempts = 3,      backoff = @Backoff(delay = 5000, multiplier = 1.5))  public String retry(Supplier supplier) throws Exception {    String result = null;    try {      result = supplier.get();    } catch (Exception exception) {      log.error("异常报错:{}", exception.getMessage());      throw exception;    }    return result;  }   @Recover  public String recover(Exception e) {    log.error("调用超过3次异常");    return "调用超过3次异常";  }}

重新执行测试看下结果

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