* Fixed missing error checking that could cause kubelet to crash in a race condition. ([#60962](https://github.com/kubernetes/kubernetes/pull/60962), [@technicianted](https://github.com/technicianted))
* Bump Heapster to v1.5.2 ([#61396](https://github.com/kubernetes/kubernetes/pull/61396), [@kawych](https://github.com/kawych))

* [alpha] Users can now add taints to nodes by condition ([design doc](https://github.com/kubernetes/community/blob/master/contributors/design-proposals/scheduling/taint-node-by-condition.md))

#### Storage

* [stable] Mount options

  * The ability to specify mount options for volumes is moved from beta to stable.

    the request already contains an `Accept` header.

 *  Fix: Don't crash with a `NullPointerException` if a server sends a close while we're sending a
    ping. OkHttp had a race condition bug.


## Version 4.6.0

_2020-04-28_

 *  Fix: Follow HTTP 307 and 308 redirects on methods other than GET and POST. We're reluctant to

- Promoted `PodHostIPs` condition to `beta`. ([#120257](https://github.com/kubernetes/kubernetes/pull/120257), [@wzshiming](https://github.com/wzshiming))
- Promoted `PodHostIPs` condition to `beta`. ([#121477](https://github.com/kubernetes/kubernetes/pull/121477), [@wzshiming](https://github.com/wzshiming))

			return true
		}
		if checkCopyObjectPartPreconditions(ctx, w, r, o) {
			return true
		}
		if parseRangeErr != nil {
			writeCopyPartErr(ctx, w, parseRangeErr, r.URL)
			// Range header mismatch is pre-condition like failure
			// so return true to indicate Range precondition failed.
			return true
		}
		return false
	}
	getOpts.CheckPrecondFn = checkCopyPartPrecondFn

- Introduced PodHasNetwork condition for pods. ([#111358](https://github.com/kubernetes/kubernetes/pull/111358), [@ddebroy](https://github.com/ddebroy))
- Introduced support for handling pod failures with respect to the configured pod failure policy rules. ([#111113](https://github.com/kubernetes/kubernetes/pull/111113), [@mimowo](https://github.com/mimowo))

    assertThat(get(url).body.string()).isEqualTo("A")
    assertThat(get(url).body.string()).isEqualTo("B")
  }

  /** @return the request with the conditional get headers. */
  private fun assertConditionallyCached(response: MockResponse): RecordedRequest {
    // scenario 1: condition succeeds
    server.enqueue(
      response
        .newBuilder()
        .body("A")
        .status("HTTP/1.1 200 A-OK")

   * create a directory, not a regular file. A common pitfall is to call {@code createTempFile},
   * delete the file and create a directory in its place, but this leads a race condition which can
   * be exploited to create security vulnerabilities, especially when executable files are to be
   * written into the directory.
   *

		bs := h.Sum(nil)
		cred.ParentUser = base64.RawURLEncoding.EncodeToString(bs)
	}

	// Deny this assume role request if the policy that the user intends to bind
	// has a sts:DurationSeconds condition, which is not satisfied as well
	{
		p := policyName
		if p == "" {
			var err error
			_, p, err = globalIAMSys.GetRolePolicy(roleArnStr)
			if err != nil {

   * create a directory, not a regular file. A common pitfall is to call {@code createTempFile},
   * delete the file and create a directory in its place, but this leads a race condition which can
   * be exploited to create security vulnerabilities, especially when executable files are to be
   * written into the directory.
   *