FactoryBean threw exception on object creation,FeignClient无法注入bean,bsun.misc.Unsafe.park异常

2020-06-03 16:25:21.551  WARN 28596 --- [           main] ConfigServletWebServerApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'utils': Injection of resource dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'com.emis.education.service.module.UserServer': FactoryBean threw exception on object creation; nested exception is java.lang.ArrayIndexOutOfBoundsException: 1
2020-06-03 16:25:21.554  INFO 28596 --- [           main] j.LocalContainerEntityManagerFactoryBean : Closing JPA EntityManagerFactory for persistence unit 'default'
2020-06-03 16:25:21.555  WARN 28596 --- [           main] o.s.b.f.support.DisposableBeanAdapter    : Invocation of destroy method 'close' failed on bean with name 'eurekaRegistration': org.springframework.beans.factory.BeanCreationNotAllowedException: Error creating bean with name 'org.springframework.cloud.netflix.eureka.EurekaClientAutoConfiguration$RefreshableEurekaClientConfiguration': Singleton bean creation not allowed while singletons of this factory are in destruction (Do not request a bean from a BeanFactory in a destroy method implementation!)
2020-06-03 16:25:21.556  INFO 28596 --- [           main] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Shutdown initiated...
2020-06-03 16:25:21.561  INFO 28596 --- [           main] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Shutdown completed.
2020-06-03 16:25:21.562  INFO 28596 --- [           main] o.apache.catalina.core.StandardService   : Stopping service [Tomcat]
查阅网上的资料无果，大部分方案是指向找不到bean，但是我的情况是已经指定了入口文件的@EnableFeignClients，只是依赖无法注入。
 最后发现问题起因是在路由层的一个方法与父类冲突或循环引用？？根源没有找到，但是我是这样改的，希望对类似的问题有帮助
 修改前
 
// 子类
@Api(tags = "xx")
@RestController
@RequestMapping("xx")
public class ExamPaperController extends BaseController<xxx,xxx,xxx> {
  @PostMapping("xxx")
  @ApiOperation("xx")
  public void create(@RequestParam("file") MultipartFile file,@PathVariable Long chapter)  {
    // TODO: 
// 父类
@Component
public class BaseController<S extends BaseService<?>,C,U> {
  @PostMapping("")
  @ApiOperation("create")
  public void create(@RequestBody C body) throws NotFoundException {
    this.verify(Thread.currentThread() .getStackTrace()[1].getMethodName(),body);
    S service = this.getService();
    service.create(body);
修改后(修改方法名)
 
// 子类
@Api(tags = "xx")
@RestController
@RequestMapping("xx")
public class ExamPaperController extends BaseController<xxx,xxx,xxx> {
  @PostMapping("xxx")
  @ApiOperation("xx")
  public void createXXX(@RequestParam("file") MultipartFile file,@PathVariable Long chapter)  {
    // TODO: 
                    FactoryBean threw exception on object creation,FeignClient无法注入bean,bsun.misc.Unsafe.park异常
                    记一个FeignClient无法注入bean的错误springcloud启动报错，错误log如下springcloud启动报错，错误log如下2020-06-03 16:25:21.551  WARN 28596 --- [           main] ConfigServletWebServerApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: 
				
FactoryBean threw exception on object creation; nested exception is org.flowable.common.engine.api.FlowableException: Error initialising dmn data model在启动Flowable和Spring Boot继承的项目时报如下错误：
后来经过排查发现是mysql的问题解决方法：找到数据库所表名以 databasechangeloglock 为后缀的表，并改成如下图格式问
					
Error creating bean with name ‘processEngine‘: FactoryBean threw exception on object creation；错误解决
					
FactoryBean threw exception on object creation; nested exception is  java.lang.IllegalStateException
在@FeignClien(“XX”) 接口类中，检查每个方法的参数定义时：
是否有如下情形
@RequestMapping(value="/XXX/query", method = RequestMethod.GET)
public PageResult<XXutionResp> query(@RequestParam(required = fals...
				
简单记录一下因为Spring版本问题, 对FeignClient中方法参数传值有了更为明确的定义
     主要原因是Spring 4.0版本后，@RequestParam 注解对参数传值有了很好的封装特性并严格校验。参数定义是@RequestParam(value = "Id") String xxId， 该注解参数默认是必填的, 如果需指定分必填, 则 @RequestParam(value = "xxId", required = false) String Id
使用Feign请求nacos中注册的服务
问题描述：
FactoryBean threw exception on object creation; nested exception is java.lang.IllegalStateException: RequestParam.value() was empty on parameter 0
原因分析：
解决方案：
设置@RequestParam Value值
				
6 Flowable-Modeler详述之常见问题Table act_ge_property doesn't exist问题描述问题定位解决方案一解决方案二(推荐)验证结果打赏版权
在配置完Springboot的开发环境以后，启动的时候遇到了这个问题，数据库版本为mysql 5.7,Flowable版本为6.4.0，详细报错如下：
org.springframework.beans.fa...
				FactoryBean threw exception on object creation,FeignClient无法注入bean,bsun.misc.Unsafe.park异常