* Fix a bug where container cannot run as root when SecurityContext.RunAsNonRoot is false. ([#47009](https://github.com/kubernetes/kubernetes/pull/47009), [@yujuhong](https://github.com/yujuhong))

  * Fix the Kubelet PLEG update timestamp to better reflect the health of the component when the container runtime request hangs. ([#45496](https://github.com/kubernetes/kubernetes/pull/45496), [@andyxning](https://github.com/andyxning))

        private final List<File> files;

        private final List<Long> timestamps;

        private final List<Long> sizes;

        private final List<String> ids;

        private final int hashCode;

        public CacheKey(List<Artifact> extensionArtifacts) {
            this.files = new ArrayList<>(extensionArtifacts.size());
            this.timestamps = new ArrayList<>(extensionArtifacts.size());

- Fixed the bug where Events failed to be created when the referenced object name was not a valid Event name. Now, a UUID is used as the name instead of the referenced object name and the timestamp suffix. ([#129790](https://github.com/kubernetes/kubernetes/pull/129790), [@aojea](https://github.com/aojea))

- Clean ReplicaSet by revision instead of creation timestamp in deployment controller ([#97407](https://github.com/kubernetes/kubernetes/pull/97407), [@waynepeking348](https://github.com/waynepeking348)) [SIG Apps]

    override val timestampNs: Long,
    override val call: Call,
  ) : CallEvent()

  data class RequestHeadersStart(
    override val timestampNs: Long,
    override val call: Call,
  ) : CallEvent()

  data class RequestHeadersEnd(
    override val timestampNs: Long,
    override val call: Call,
    val headerLength: Long,
  ) : CallEvent() {

* Upgrade Stackdriver Logging Agent addon image to 0.6-1.6.0-1 to use Fluentd v1.2. This provides nanoseconds timestamp granularity for logs. ([#70954](https://github.com/kubernetes/kubernetes/pull/70954), [@qingling128](https://github.com/qingling128))

* Upgrade Stackdriver Logging Agent addon image to 0.6-1.6.0-1 to use Fluentd v1.2. This provides nanoseconds timestamp granularity for logs. ([#70954](https://github.com/kubernetes/kubernetes/pull/70954), [@qingling128](https://github.com/qingling128))

- kube-apiserver now reloads the `--authorization-config` file when it changes. Reloads increment the `apiserver_authorization_config_controller_automatic_reload_last_timestamp_seconds` timestamp metric, with `status="success"` for successful reloads and `status="failed"` for failed reloads. Failed reloads keep using the previously loaded authorization configuration.

  }

  data class ConnectionClosed(
    override val timestampNs: Long,
    override val connection: Connection,
  ) : ConnectionEvent()

  data class ConnectionAcquired(
    override val timestampNs: Long,
    override val connection: Connection,
    val call: Call,
  ) : ConnectionEvent()

  data class ConnectionReleased(
    override val timestampNs: Long,
    override val connection: Connection,
    val call: Call,

- Fixed bug that kubelet resource metric `container_start_time_seconds` had timestamp equal to container start time. ([#120518](https://github.com/kubernetes/kubernetes/pull/120518), [@saschagrunert](https://github.com/saschagrunert)) [SIG Instrumentation, Node and Testing]