关于报错 feign.RetryableException: too many bytes written executing POST

Feign报错    too many bytes written executing POST

此错误是出现在feign服务间调用时出现的问题

经过排查是configuration配置配文件出了问题

因为服务之间调用需要携带一些用户信息之类的 所以实现了Feign的RequestInterceptor拦截器复制请求头，复制的时候是所有头都复制的,可能导致Content-length长度跟body不一致. 所以只需要判断如果是Content-length就跳过

修改前：：：：

@Configuration
public class FeignClientsConfiguration implements RequestInterceptor {
    @Override
    public void apply(RequestTemplate requestTemplate) {
        // 此种方式是线程安全的
        ServletRequestAttributes attributes = (ServletRequestAttributes) RequestContextHolder
                .getRequestAttributes();
        // 不为空时取出请求中的header 原封不动的设置到feign请求中
        if (null != attributes) {
            HttpServletRequest request = attributes.getRequest();
            // 遍历设置 也可从request取出整个Header 写到RequestTemplate 中
            Enumeration<String> headerNames = request.getHeaderNames();
            if (headerNames != null) {
                while (headerNames.hasMoreElements()) {
                    String name = headerNames.nextElement();
                    String values = request.getHeader(name);
                    requestTemplate.header(name, values);
                }
            }
        }
    }
}

 修改后：：：：

@Configuration
public class FeignClientsConfiguration implements RequestInterceptor {
    @Override
    public void apply(RequestTemplate requestTemplate) {
        // 此种方式是线程安全的
        ServletRequestAttributes attributes = (ServletRequestAttributes) RequestContextHolder
                .getRequestAttributes();
        // 不为空时取出请求中的header 原封不动的设置到feign请求中
        if (null != attributes) {
            HttpServletRequest request = attributes.getRequest();
            // 遍历设置 也可从request取出整个Header 写到RequestTemplate 中
            Enumeration<String> headerNames = request.getHeaderNames();
            if (headerNames != null) {
                while (headerNames.hasMoreElements()) {
                    String name = headerNames.nextElement();
                    String values = request.getHeader(name);
                    // 跳过 content-length
                    if (name.equals("content-length")){
                        continue;
                    }
                    requestTemplate.header(name, values);
                }
            }
        }
    }
}

！！！重启测试，完美解决