* Allow setting the Host header in a httpGet probe ([#24292](https://github.com/kubernetes/kubernetes/pull/24292), [@errm](https://github.com/errm))
* Fix goroutine leak in ssh-tunnel healthcheck. ([#24487](https://github.com/kubernetes/kubernetes/pull/24487), [@cjcullen](https://github.com/cjcullen))

            char[] in = url.getPath().toCharArray();
            char[] out = new char[in.length];
            int length = in.length, i, o, state, s;

                              /* The canonicalization routine
                               */
            state = 0;
            o = 0;
            for( i = 0; i < length; i++ ) {
                switch( state ) {
                    case 0:

* kube-apiserver: Fixed a regression accepting patch requests > 1MB ([#84963](https://github.com/kubernetes/kubernetes/pull/84963), [@liggitt](https://github.com/liggitt))
* kube-apiserver: fixed a bug that could cause a goroutine leak if the apiserver encountered an encoding error serving a watch to a websocket watcher ([#84693](https://github.com/kubernetes/kubernetes/pull/84693), [@tedyu](https://github.com/tedyu))

- K8s.io/client-go/tools/record.EventBroadcaster: after Shutdown() is called, the broadcaster now gives up immediately after a failure to write an event to a sink. Previously it tried multiple times for 12 seconds in a goroutine. ([#115514](https://github.com/kubernetes/kubernetes/pull/115514), [@pohly](https://github.com/pohly)) [SIG API Machinery]

* kube-apiserver: Fixed a regression accepting patch requests > 1MB ([#84963](https://github.com/kubernetes/kubernetes/pull/84963), [@liggitt](https://github.com/liggitt))
* kube-apiserver: fixed a bug that could cause a goroutine leak if the apiserver encountered an encoding error serving a watch to a websocket watcher ([#84693](https://github.com/kubernetes/kubernetes/pull/84693), [@tedyu](https://github.com/tedyu))

* Use context to check client closed instead of http.CloseNotifier in processing watch request which will reduce 1 goroutine for each request if proto is HTTP/2.x . ([#85408](https://github.com/kubernetes/kubernetes/pull/85408), [@answer1991](https://github.com/answer1991))

- The `goroutines` metric is newly added in the scheduler. 
  It replaces `scheduler_goroutines` metric and it counts the number of goroutine in more places than `scheduler_goroutine` does. ([#112003](https://github.com/kubernetes/kubernetes/pull/112003), [@sanposhiho](https://github.com/sanposhiho)) [SIG Instrumentation and Scheduling]

## Changelog since v1.13.2

### Other notable changes

* Update to go1.11.5 ([#73326](https://github.com/kubernetes/kubernetes/pull/73326), [@ixdy](https://github.com/ixdy))
* add goroutine to move unschedulable pods to activeq if they are not retried for more than 1 minute ([#72558](https://github.com/kubernetes/kubernetes/pull/72558), [@denkensk](https://github.com/denkensk))

- Bump `sigs.k8s.io/apiserver-network-proxy/konnectivity-client@v0.0.30` to fix a goroutine leak in kube-apiserver when using egress selctor with the gRPC mode. ([#108437](https://github.com/kubernetes/kubernetes/pull/108437), [@andrewsykim](https://github.com/andrewsykim))

* Fix resync goroutine leak in ListAndWatch ([#35672](https://github.com/kubernetes/kubernetes/pull/35672), [@tatsuhiro-t](https://github.com/tatsuhiro-t))

#### client-go