关于 nginx：epoll_wait() 报客户端过早关闭连接，所以在向上游发送请求的同时也关闭了上游连接

epoll_wait() reported that client prematurely closed connection, so upstream connection is closed too while sending request to upstream

我有一个网页，它运行良好。但是对于只有一个路径 /user/reg 它给出了 502 错误代码，因为该路径需要更多的时间来处理，所以我已经向容器添加了活性和就绪性探测器，但仍然有同样的问题。我正在使用 Kubernetes 入口和 GCP 中部署的完整堆栈。

下面是我的入口配置

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apiVersion: networking.k8s.io/v1beta1
kind: Ingress
metadata:
annotations:
kubernetes.io/ingress.global-static-ip-name:"nonprod"
ingress.kubernetes.io/force-ssl-redirect:"true"
kubernetes.io/ingress.allow-http:"false"
ingress.kubernetes.io/upstream-max-fails:"999"
ingress.kubernetes.io/upstream-fail-timeout:"999"
name: nonprod
namespace: nonprod
spec:
tls:
- hosts:
- hostname.example.com
secretName: nonprod-tls
rules:
- host: hostname.example.com
http:
paths:
- path: /*
backend:
serviceName: nonprod-nodeport
servicePort: 80

下面是我的部署 yaml

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image: gcr.io/image:v1
livenessProbe:
failureThreshold: 3
httpGet:
path: /
port: 80
scheme: HTTP
initialDelaySeconds: 180
periodSeconds: 10
successThreshold: 1
timeoutSeconds: 1
name: drupal
ports:
- containerPort: 80
readinessProbe:
failureThreshold: 3
httpGet:
path: /
port: 80
scheme: HTTP
initialDelaySeconds: 180
periodSeconds: 10
successThreshold: 1
timeoutSeconds: 1
resources:
limits:
cpu:"1"
memory: 2Gi
requests:
cpu:"1"
memory: 2Gi

我检查了其他类似的问题，但没有帮助

当我检查日志时

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2020/03/20 06:46:35 [info] 91#91: *60234 epoll_wait() reported that client prematurely closed connection, so upstream connection is closed too while sending request to upstream, clie
nt: 10.44.0.1, server: example.com, request:"POST /user/register HTTP/1.1", upstream:"fastcgi://unix:/var/run/php-fpm.sock:", host:"hostname.example.com", referre
r:"https://hostname.example.com/user/register"
10.44.0.1 - - [20/Mar/2020:06:46:35 +0000]"POST /user/register HTTP/1.1" 499 0"https://hostname.example.com/user/register""Mozilla/5.0 (Macintosh; Intel Mac OS X
10_14_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.132 Safari/537.36 Edg/80.0.361.66""27.59.32.87, 34.107.231.112"
10.44.0.1 - - [20/Mar/2020:06:46:35 +0000]"GET / HTTP/1.1" 200 17662"-""kube-probe/1.15+""-"