* ordering information is updated. This is used to avoid lock contention by recording a memento
   * of reads and delaying a lock acquisition until the threshold is crossed or a mutation occurs.
   *
   * <p>This must be a (2^n)-1 as it is used as a mask.
   */
  static final int DRAIN_THRESHOLD = 0x3F;

  /**

      it.second = strings::StrCat(
          "Operation '", op.node.DebugString(), "' was changed by ",
          mutation_type,
          " after it was run by a session. This mutation will have no effect, "
          "and will trigger an error in the future. Either don't modify "
          "nodes after running them or create a new session.");
    }
  }
}

namespace {

		// is ready to be read.
		//
		// This is possible to be lock free because
		// - xl.meta for inlined objects has already read the data
		//   into memory, any mutation on xl.meta subsequently is
		//   inconsequential to the overall read operation.
		// - xl.meta metadata is still verified for quorum under lock()
		//   however writing the response doesn't need to serialize

- kube-apiserver: setting a `dryRun` query parameter on a CONNECT request will now cause the request to be rejected, consistent with behavior of other mutating API requests. Examples of CONNECT APIs are the `nodes/proxy`, `services/proxy`, `pods/proxy`, `pods/exec`, and `pods/attach` subresources. Note that this prevents sending a `dryRun` parameter to backends via `{nodes,services,pods}/proxy` subresources....

* Bump GCE metadata proxy to v0.1.9 to pick up security fixes. ([#58221](https://github.com/kubernetes/kubernetes/pull/58221), [@ihmccreery](https://github.com/ihmccreery))
* kubeadm now supports CIDR notations in NO_PROXY environment variable ([#53895](https://github.com/kubernetes/kubernetes/pull/53895), [@kad](https://github.com/kad))

 in your manifest. An object with a spec.selector value that does not match the labels in
 its spec.template is invalid.

 - Selector mutation is disabled for all kinds in the
 app/v1beta2 group version, because the controllers in the workloads API do not handle
 selector mutation in
 a consistent way. This restriction may be lifted in the future, but
 it is likely that that selectors will remain immutable after the move to v1.

   ([#123179](https://github.com/kubernetes/kubernetes/pull/123179), [@aramase](https://github.com/aramase))
- Added feature gate `MutatingAdmissionPolicy` for enabling mutation policy in admission chain. ([#123425](https://github.com/kubernetes/kubernetes/pull/123425), [@cici37](https://github.com/cici37))

* Delete all firewall rules (and optionally network) on GCE/GKE cluster teardown ([#34577](https://github.com/kubernetes/kubernetes/pull/34577), [@ixdy](https://github.com/ixdy))
* Fixed mutation warning in Attach/Detach controller ([#35273](https://github.com/kubernetes/kubernetes/pull/35273), [@jsafrane](https://github.com/jsafrane))

* Added rkt binary to GCI ([#35321](https://github.com/kubernetes/kubernetes/pull/35321), [@vishh](https://github.com/vishh))
* Fixed mutation warning in Attach/Detach controller ([#35273](https://github.com/kubernetes/kubernetes/pull/35273), [@jsafrane](https://github.com/jsafrane))

  * Roll up volume error messages in the kubelet sync loop. ([#44938](https://github.com/kubernetes/kubernetes/pull/44938), [@jayunit100](https://github.com/jayunit100))

  * Allow pods to opt out of PodPreset mutation via an annotation on the pod. ([#44965](https://github.com/kubernetes/kubernetes/pull/44965), [@jpeeler](https://github.com/jpeeler))