SpringCloud Feign调用报错feign.RetryableException: too many bytes written executing
版本:
SpringCloud : Greenwich.SR5
SpringBoot : 2.1.9.RELEASE
SpringCloudAlibaba : 2.1.0.RELEASE
看到这个错误第一时间我也是打开百度/Goole 但是搜出来的,无一例外 基本都是添加feign增强包 feign-httpclient 或者feign-okhttp 包;
无奈之下只好一步步debug 发现是把request.body 写入到流时发生的错误.java.io.IOException: insufficient data written
后面搜到body是跟Content-Length
有关系的... 附上博主链接 https://my.oschina.net/u/4410077/blog/3323588 看了之后 原来发生这个问题的原因跟我一样,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
原配置 :
/**
* @author Joe
* createTime 2020/06/10 18:13
*/
@Log4j2
@Configuration
public class FeignConfiguration implements RequestInterceptor {
@Override
public void apply(RequestTemplate template) {
ServletRequestAttributes attributes = (ServletRequestAttributes) RequestContextHolder
.getRequestAttributes();
HttpServletRequest request = attributes.getRequest();
Enumeration<String> headerNames = request.getHeaderNames();
if (headerNames != null) {
while (headerNames.hasMoreElements()) {
String name = headerNames.nextElement();
String values = request.getHeader(name);
template.header(name, values);
}
} else {
log.info("feign interceptor error header:{}", template);
}
}
}
修改之后:
/**
* @author Joe
* createTime 2020/06/10 18:13
*/
@Log4j2
@Configuration
public class FeignConfiguration implements RequestInterceptor {
@Override
public void apply(RequestTemplate template) {
ServletRequestAttributes attributes = (ServletRequestAttributes) RequestContextHolder
.getRequestAttributes();
HttpServletRequest request = attributes.getRequest();
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;
}
template.header(name, values);
}
} else {
log.info("feign interceptor error header:{}", template);
}
}
}
content-length详解参考文章 :https://juejin.im/post/5d772cb4e51d453b5f1a0502