activator error

gistfile1.txt

{
	"level": "error",
	"ts": "2020-01-03T14:42:08.615Z",
	"logger": "activator",
	"caller": "network/error_handler.go:31",
	"msg": "error reverse proxying request; sockstat: sockets: used 2178\nTCP: inuse 1145 orphan 41 tw 494 alloc 3535 mem 2947\nUDP: inuse 0 mem 35\nUDPLITE: inuse 0\nRAW: inuse 0\nFRAG: inuse 0 memory 0\n",
	"knative.dev/controller": "activator",
	"knative.dev/pod": "activator-947bd7448-9mxxv",
	"knative.dev/key": "event-example/wathola-forwarder-d96jq",
	"error": "read tcp 10.128.4.9:56414->10.131.0.14:8012: read: connection reset by peer",
	"stacktrace": "
  knative.dev/serving/pkg/network.ErrorHandler.func1
        /opt/app-root/src/go/src/knative.dev/serving/pkg/network/error_handler.go:31
net/http/httputil.(*ReverseProxy).ServeHTTP
        /usr/lib/golang/src/net/http/httputil/reverseproxy.go:251
knative.dev/serving/pkg/activator/handler.(*activationHandler).proxyRequest
        /opt/app-root/src/go/src/knative.dev/serving/pkg/activator/handler/handler.go:155
knative.dev/serving/pkg/activator/handler.(*activationHandler).ServeHTTP.func1
        /opt/app-root/src/go/src/knative.dev/serving/pkg/activator/handler/handler.go:105
knative.dev/serving/pkg/activator/net.(*revisionThrottler).try.func1
        /opt/app-root/src/go/src/knative.dev/serving/pkg/activator/net/throttler.go:177
knative.dev/serving/pkg/activator/net.(*infiniteBreaker).Maybe
        /opt/app-root/src/go/src/knative.dev/serving/pkg/activator/net/throttler.go:630
knative.dev/serving/pkg/activator/net.(*revisionThrottler).try
        /opt/app-root/src/go/src/knative.dev/serving/pkg/activator/net/throttler.go:168
knative.dev/serving/pkg/activator/net.(*Throttler).Try
        /opt/app-root/src/go/src/knative.dev/serving/pkg/activator/net/throttler.go:419
knative.dev/serving/pkg/activator/handler.(*activationHandler).ServeHTTP
        /opt/app-root/src/go/src/knative.dev/serving/pkg/activator/handler/handler.go:95
knative.dev/serving/pkg/activator/handler.(*RequestEventHandler).ServeHTTP
        /opt/app-root/src/go/src/knative.dev/serving/pkg/activator/handler/requestevent_handler.go:67
knative.dev/serving/vendor/go.opencensus.io/plugin/ochttp.(*Handler).ServeHTTP
        /opt/app-root/src/go/src/knative.dev/serving/vendor/go.opencensus.io/plugin/ochttp/server.go:86
knative.dev/serving/pkg/activator/config.(*storeMiddleware).ServeHTTP
        /opt/app-root/src/go/src/knative.dev/serving/pkg/activator/config/store.go:83
knative.dev/serving/pkg/http.(*RequestLogHandler).ServeHTTP
        /opt/app-root/src/go/src/knative.dev/serving/pkg/http/request_log.go:135
knative.dev/serving/pkg/activator/handler.(*ProbeHandler).ServeHTTP
        /opt/app-root/src/go/src/knative.dev/serving/pkg/activator/handler/probe_handler.go:41
knative.dev/serving/pkg/activator/handler.(*HealthHandler).ServeHTTP
        /opt/app-root/src/go/src/knative.dev/serving/pkg/activator/handler/healthz_handler.go:38
knative.dev/serving/pkg/network.(*handler).ServeHTTP
        /opt/app-root/src/go/src/knative.dev/serving/pkg/network/probe_handler.go:40
knative.dev/serving/pkg/activator/handler.(*MetricHandler).ServeHTTP
        /opt/app-root/src/go/src/knative.dev/serving/pkg/activator/handler/metric_handler.go:91
knative.dev/serving/vendor/golang.org/x/net/http2/h2c.h2cHandler.ServeHTTP
        /opt/app-root/src/go/src/knative.dev/serving/vendor/golang.org/x/net/http2/h2c/h2c.go:98
net/http.serverHandler.ServeHTTP
        /usr/lib/golang/src/net/http/server.go:2802
net/http.(*conn).serve
        /usr/lib/golang/src/net/http/server.go:1890"
}