Having a simple go HTTP server responding with ~32kB responses, deployed as a ksvc with forced 1 replica

        autoscaling.knative.dev/maxScale: "1"
        autoscaling.knative.dev/minScale: "1"

and default containerConcurrency (=0)

and a client deployment connecting to the ksvc via its local http://<name>.<namespace>.svc.cluster.local

The client has 32 parallel goroutines, each issuing repeatedly with 10ms sleep between requests (max. 100requests/s each)

(The client limits its max connections via MaxIdleConnsPerHost = 100)

The client sporadically* (*once per ~300.000 requests in my current run) sees "unexpected EOF" errors reading the response body.
At the time of EOFs, the following errors sometimes appear in server's queue-proxy logs:

httputil: ReverseProxy read error during body copy: read tcp 127.0.0.1:50158->127.0.0.1:8080: use of closed network connection

And sometimes these in activator logs:

httputil: ReverseProxy read error during body copy: unexpected EOF

Deploying the same images as ordinary k8s Deployments don't seem to manifest any such errors.

Reproducer: https://github.com/maschmid/queue-proxy-use-of-closed-network-connection-error