本文记录了在SpringBoot启动时异常TypeNotPresentExceptionProxy的排查记录

SpringBoot版本（2.0.3.RELEASE）

 <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.3.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

异常过程：

Error creating bean with name 'requestMappingHandlerMapping' defined in class path resource [org/springframework/boot/autoconfigure/web/servlet/WebMvcAutoConfiguration$EnableWebMvcConfiguration.class]

在SpringBoot激活SpringMVC自动配置时抛出 java.lang.ArrayStoreException: sun.reflect.annotation.TypeNotPresentExceptionProxy，从异常堆栈信息找不到任何其他有用信息。

• 完整堆栈信息

~~~[ERROR]~~[2020-02-26 20:57:52.041]~~[galaxy-open-api]~~[@project.version@]~~[TID: N/A]~~[main]~~[o.s.boot.SpringApplication.reportFailure:842 -Application run failed]~~~
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'requestMappingHandlerMapping' defined in class path resource [org/springframework/boot/autoconfigure/web/servlet/WebMvcAutoConfiguration$EnableWebMvcConfiguration.class]: Invocation of init method failed; nested exception is java.lang.ArrayStoreException: sun.reflect.annotation.TypeNotPresentExceptionProxy
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1708)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:581)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:503)
    at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:317)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:315)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:760)
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:869)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:550)
    at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:140)
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:759)
    at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:395)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:327)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1255)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1243)
    at com.tax.TaxApplication.main(TaxApplication.java:24)
Caused by: java.lang.ArrayStoreException: sun.reflect.annotation.TypeNotPresentExceptionProxy
    at sun.reflect.annotation.AnnotationParser.parseClassArray(AnnotationParser.java:724)
    at sun.reflect.annotation.AnnotationParser.parseArray(AnnotationParser.java:531)
    at sun.reflect.annotation.AnnotationParser.parseMemberValue(AnnotationParser.java:355)
    at sun.reflect.annotation.AnnotationParser.parseAnnotation2(AnnotationParser.java:286)
    at sun.reflect.annotation.AnnotationParser.parseAnnotations2(AnnotationParser.java:120)
    at sun.reflect.annotation.AnnotationParser.parseAnnotations(AnnotationParser.java:72)
    at java.lang.Class.createAnnotationData(Class.java:3521)
    at java.lang.Class.annotationData(Class.java:3510)
    at java.lang.Class.createAnnotationData(Class.java:3526)
    at java.lang.Class.annotationData(Class.java:3510)
    at java.lang.Class.getAnnotation(Class.java:3415)
    at java.lang.reflect.AnnotatedElement.isAnnotationPresent(AnnotatedElement.java:258)
    at java.lang.Class.isAnnotationPresent(Class.java:3425)
    at org.springframework.core.annotation.AnnotatedElementUtils.hasAnnotation(AnnotatedElementUtils.java:573)
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping.isHandler(RequestMappingHandlerMapping.java:177)
    at org.springframework.web.servlet.handler.AbstractHandlerMethodMapping.initHandlerMethods(AbstractHandlerMethodMapping.java:217)
    at org.springframework.web.servlet.handler.AbstractHandlerMethodMapping.afterPropertiesSet(AbstractHandlerMethodMapping.java:188)
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping.afterPropertiesSet(RequestMappingHandlerMapping.java:129)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1767)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1704)
    ... 16 common frames omitted

解决思路

1. 官网issue

• 依赖冲突

  https://github.com/spring-projects/spring-boot/issues/11214

只能确定是依赖冲突，依然无法定位问题。

• 不支持旧版本activiti

  https://github.com/spring-projects/spring-boot/issues/13165

确定没有引用activiti

2.异常断点

可捕获特定异常的断点DEBUG功能

• 打开idea断点界面

• 新增异常断点类型 ArrayStoreException.class

• f8 继续执行，进入断点后，查看调用栈。发现是SpringBoot注解解释器在尝试解释数组时异常，来源于注解com.github.pagehelper.autoconfigure.PageHelperAutoConfiguration

-且具体由sun.reflect.annotation.TypeNotPresentExceptionProxy#TypeNotPresentExceptionProxy抛出

• 进入具体的sun.reflect.annotation.TypeNotPresentExceptionProxy#TypeNotPresentExceptionProxy查看，具体错误原因在激活MybatisAutoConfiguration时发生了java.lang.ClassNotFoundException.

• 故最终在com.github.pagehelper依赖里发现先前排除了mybatis-starter的依赖，导致pagehelper调用mybatis的自动配置类时找不到该类

• 添加相关依赖后，服务启动恢复正常。