unit test meet the exception

Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'com.yunpian.marketing.base.service.client.FlowServiceFeignClient': FactoryBean threw exception on object creation; nested exception is java.lang.IllegalStateException: PathVariable annotation was empty on param 0.
    at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.doGetObjectFromFactoryBean(FactoryBeanRegistrySupport.java:168)
    at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.getObjectFromFactoryBean(FactoryBeanRegistrySupport.java:101)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getObjectForBeanInstance(AbstractBeanFactory.java:1645)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.getObjectForBeanInstance(AbstractAutowireCapableBeanFactory.java:1178)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:258)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:200)
    at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:251)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.addCandidateEntry(DefaultListableBeanFactory.java:1325)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.findAutowireCandidates(DefaultListableBeanFactory.java:1291)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1101)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1065)
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:584)
    ... 55 more
Caused by: java.lang.IllegalStateException: PathVariable annotation was empty on param 0.
    at feign.Util.checkState(Util.java:126)
    at org.springframework.cloud.openfeign.annotation.PathVariableParameterProcessor.processArgument(PathVariableParameterProcessor.java:51)
    at org.springframework.cloud.openfeign.support.SpringMvcContract.processAnnotationsOnParameter(SpringMvcContract.java:238)
    at feign.Contract$BaseContract.parseAndValidateMetadata(Contract.java:108)
    at org.springframework.cloud.openfeign.support.SpringMvcContract.parseAndValidateMetadata(SpringMvcContract.java:133)
    at feign.Contract$BaseContract.parseAndValidatateMetadata(Contract.java:64)
    at feign.ReflectiveFeign$ParseHandlersByName.apply(ReflectiveFeign.java:153)
    at feign.ReflectiveFeign.newInstance(ReflectiveFeign.java:52)
    at feign.Feign$Builder.target(Feign.java:242)
    at org.springframework.cloud.openfeign.HystrixTargeter.target(HystrixTargeter.java:39)
    at org.springframework.cloud.openfeign.FeignClientFactoryBean.loadBalance(FeignClientFactoryBean.java:223)
    at org.springframework.cloud.openfeign.FeignClientFactoryBean.getTarget(FeignClientFactoryBean.java:252)
    at org.springframework.cloud.openfeign.FeignClientFactoryBean.getObject(FeignClientFactoryBean.java:232)
    at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.doGetObjectFromFactoryBean(FactoryBeanRegistrySupport.java:161)
    ... 66 more

Comment From: spencergibb

Please post your client and versions

Comment From: foxundermoon

  @GetMapping("/flow/{id}")
  @ResponseBody
  Flow findByFlowId(@PathVariable String id);

after add default value ,test success. 

  @GetMapping("/flow/{id}")
  @ResponseBody
  Flow findByFlowId(@PathVariable("id") String id);

but the normal run is ok without default value @RequestParam and @PathVariable

Comment From: spencergibb

You have to enable parameter retention in the jdk -parameters or something

Comment From: spring-projects-issues

If you would like us to look at this issue, please provide the requested information. If the information is not provided within the next 7 days this issue will be closed.

Comment From: foxundermoon

I use gradle to run test task . how to pass the -parameters argument, and what the argument means.

Comment From: foxundermoon

why needent add the argument when normal run ？

Comment From: ryanjbaxter

I am not sure what you mean, the build has been passing fine for a while now on multiple CI systems.

Comment From: spring-projects-issues

If you would like us to look at this issue, please provide the requested information. If the information is not provided within the next 7 days this issue will be closed.

Comment From: spring-projects-issues

Closing due to lack of requested feedback. If you would like us to look at this issue, please provide the requested information and we will re-open the issue.

Comment From: leechor

I also meet exception, and spend some hours to solve it, finally the problem is made by refactor Method class privateGetParameters(), the solvation is compile use javac -parameter ...", if you use idea, add "-parameters" under Java Compiler-> Additonal command line parameters settings. if you use gradle, add apply plugin: 'java' compileJava { options.compilerArgs << '-parameters' } ` note that clean your project before try again

Comment From: boly38

equivalent for maven

               <plugin>
                    <groupId>org.apache.maven.plugins</groupId>
                    <artifactId>maven-compiler-plugin</artifactId>
                    <configuration>
                        <compilerArgs>
                            <arg>-parameters</arg>
                        </compilerArgs>

(doc):

-parameters Stores formal parameter names of constructors and methods in the generated class file so that the method java.lang.reflect.Executable.getParameters from the Reflection API can retrieve them.