traefik reset a persistence connection to upstream

[ccdeville]

Do you want to request a feature or report a bug?

Bug

What did you do?

I deploy traefik using daemonset in k8s
Client connection traefik use http/1.1
The client sends post request with keep-alive head and the reponse exceeds 4kb
The connection is busy　no idle situation

What did you see instead?

The following log appears in traefik

reverseproxy.go:445: httputil: ReverseProxy read error during body copy: read tcp 10.0.0.1:55818->10.0.0.2:80: use of closed network connection

I captured all the traffic with tcpdump

9194	2020-08-04 11:28:10.486443	10.0.0.1	10.0.0.2	TCP	66	59958 → 80 [RST, ACK] Seq=28414 Ack=76298 Win=178304 Len=0 TSval=0 TSecr=279582616

I found this issue
GitHub Pages
Is this caused by go? How can I fix it.

Output of traefik version: (What version of Traefik are you using?)

Version:      2.2.8
Codename:     chevrotin
Go version:   go1.14.6
Built:        2020-07-28T15:46:03Z
OS/Arch:      linux/amd64

What is your environment & configuration (arguments, toml, provider, platform, ...)?

defaultEntryPoints = ["http"]
debug = false
logLevel = "WARN"
InsecureSkipVerify = true
[global]
  checkNewVersion = false
[entryPoints]
  [entryPoints.http]
  address = ":80"
[web]
  address = ":8090"
[api]
  insecure = true
  dashboard = true
  debug = false
[kubernetes]
[providers.kubernetesIngress]
  endpoint = "http://192.168.0.1:80"
[ping]
entryPoint = "http"
[log]
  filePath = "/data/traefik.log"
  level = "WARN"
[accessLog]
  filePath = "/data/access.log"
  [accessLog.filters]
    statusCodes = ["400-499", "500-504"]
    retryAttempts = true
    minDuration = "10ms"

If applicable, please paste the log output in DEBUG level (--log.level=DEBUG switch)

time+"2020-08-04T10:50:27Z" level=debug msg="Request has been aborted [10.0.0.1:55818 - /urlpath/1.aspx]: net/http:abort Handler" middlewareName=traefik-internal-recovery middlewareType=Recovery

[ccdeville]

i write a proxy used golang ,The problem is still happen.

[kevtainer]

Hi @ccdeville , thank you for submitting this issue. In order to investigate this further, it'd be helpful if the team had an example that can reproduce the issue. It sounds like this may be an issue with the net/http package, but if you could provide an example docker image and steps to reproduce, it'd help us better understand the issue you're encountering.

[kevtainer]

potentially related, and may reproduce the issue on traefik -- caddyserver/caddy#3557 (comment)

[ccdeville]

Hi @notsureifkevin thank you for your reply，I write the example in this issue -- golang/go#40747

[traefiker]

Hi! I'm Træfiker 🤖 the bot in charge of tidying up the issues.

I have to close this one because of its lack of activity 😞

Feel free to re-open it or join our Community Forum.

[tjsousa]

A fix for this problem in our case (using a Kubernetes Daemon Set deployment for Traefik) was to change externalTrafficPolicy: Local (from the default Cluster). Thought I would share as we saw a concrete drop in the Resets as a consequence of this change and can help others.