springcloud 搭建遇到的问题-网关Connection has been closed BEFORE response, while sending request body

@PostMapping(value = "hi")
public String postHi(@RequestHeader HttpHeaders headers, HttpServletRequest request) {
  return request.getHeader("Content-Length");
}

Spring cloud gateway route configuration :

spring:
  cloud:
    gateway:
      routes:
        - id: hi
          uri: http://localhost:8080/hi
          predicates:
            - Path=/hi/**

So when I upload small file (size:1000 KB) via a postman request I get no error but when the file is large (size :10 MO) I get the following error :

{
    "timestamp": "2019-12-10T20:52:33.554+0000",
    "path": "/hi",
    "status": 500,
    "error": "Internal Server Error",
    "message": "Connection has been closed BEFORE response, while sending request body",
    "requestId": "ad589017"
}

with this stack :

reactor.netty.http.client.PrematureCloseException: Connection has been closed BEFORE response, while sending request body
    Suppressed: reactor.core.publisher.FluxOnAssembly$OnAssemblyException: 
Error has been observed at the following site(s):
    |_ checkpoint ⇢ org.springframework.cloud.gateway.filter.WeightCalculatorWebFilter [DefaultWebFilterChain]
    |_ checkpoint ⇢ HTTP POST "/hi" [ExceptionHandlingWebHandler]
Stack trace:

 [reactor-http-epoll-8] ERROR [studyX-gateway,cf0edfec528a956e,cf0edfec528a956e,true] o.s.b.a.w.r.error.AbstractErrorWebExceptionHandler:122 - [840b107e-14] 500 Server Error for HTTP POST "/api/xxx/"
reactor.netty.http.client.PrematureCloseException: Connection has been closed BEFORE response, while sending request body
Suppressed: reactor.core.publisher.FluxOnAssembly$OnAssemblyException:
Error has been observed at the following site(s):
|_ checkpoint ⇢ org.springframework.web.cors.reactive.CorsWebFilter [DefaultWebFilterChain]
|_ checkpoint ⇢ org.springframework.cloud.gateway.filter.WeightCalculatorWebFilter [DefaultWebFilterChain]
|_ checkpoint ⇢ org.springframework.cloud.sleuth.instrument.web.TraceWebFilter [DefaultWebFilterChain]
|_ checkpoint ⇢ HTTP POST "/api/xxx/" [ExceptionHandlingWebHandler]
Stack trace:

解决：下游配置超时时间

server:
  port: 6000
  tomcat:
    connection-timeout: 6000