hystrix报错找不到相应的fallbackMethod

1. 问题出现：

当消费者客户端调用提供者的服务时，会出现以下错误，调用方出现以下错误

2020-11-27 17:03:51.996 ERROR 11536 --- [p-nio-80-exec-5] o.a.c.c.C.[.[.[/].[dispatcherServlet]    : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is org.springframework.web.client.HttpServerErrorException$InternalServerError: 500 : [{"timestamp":"2020-11-27T09:03:51.952+00:00","status":500,"error":"Internal Server Error","trace":"com.netflix.hystrix.contrib.javanica.exception.FallbackDefinitionException: fallback method wasn't fo... (8286 bytes)]] with root cause

org.springframework.web.client.HttpServerErrorException$InternalServerError: 500 : [{"timestamp":"2020-11-27T09:03:51.952+00:00","status":500,"error":"Internal Server Error","trace":"com.netflix.hystrix.contrib.javanica.exception.FallbackDefinitionException: fallback method wasn't fo... (8286 bytes)]
    at org.springframework.web.client.HttpServerErrorException.create(HttpServerErrorException.java:100) ~[spring-web-5.2.7.RELEASE.jar:5.2.7.RELEASE]

而提供接口服务的一方报的错误如下：

2020-11-27 17:03:51.937 ERROR 376 --- [nio-8001-exec-1] o.a.c.c.C.[.[.[/].[dispatcherServlet]    : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is com.netflix.hystrix.contrib.javanica.exception.FallbackDefinitionException: fallback method wasn't found: processHystrixGetDept([long])] with root cause

com.netflix.hystrix.contrib.javanica.exception.FallbackDefinitionException: fallback method wasn't found: processHystrixGetDept([long])

从上面的报错信息可以看出来 fallback method wasn't found: processHystrixGetDept([long]) ，说明是fallback method 方法有问题，后来发现是Long和long的问题，代码如下：

@GetMapping("/dept/get/{id}")
    @HystrixCommand(fallbackMethod = "processHystrixGetDept")
    public Dept dept(@PathVariable("id") long id) {
        Dept dept = deptService.queryById(id);
        if (dept == null) {
            throw new RuntimeException("该id" + id + "没有对应的信息");
        }
        return dept;
    }

    public Dept processHystrixGetDept(Long id) {
        return new Dept().setDeptno(id)
                .setDname("该id：" + id + "没有对应的信息，null@HystrixCommand")
                .setDb_source("没有该数据库信息");
    }

2. 问题解决，定义的备用方法中是Long包装类，但是原始方法中是long基本类型，这就是报错的源头，我将其统一之后就没有报错了