* API fields previously capable of storing and returning either `[]` and `null` via JSON API requests (for example, the Endpoints `subsets` field) can now store only `null` when created using the protobuf content-type or stored in etcd using protobuf serialization (the default in 1.6+). JSON API clients should tolerate `null` values for such fields, and treat `null` and `[]` as equivalent in meaning unless specifically documented otherwise...

ControllerPublishVolume/ControllerUnpublishVolume, and NodePublishVolume/NodeUnpublishVolume operations. Before this change all API calls had to fetch key/value stored in secret and use it to authenticate/authorize these operations. With this change API calls receive key/value as a input parameter so they not need to know where and how credentials were stored and fetched. Main goal was to make these API calls CO (Container Orchestrator) agnostic.  ([#60118](https://github.com/kubernetes/kubernetes/pull/60118),...

		os.Sweep()
	}
}

// PutObjectExtractHandler - PUT Object extract is an extended API
// based off from AWS Snowball feature to auto extract compressed
// stream will be extracted in the same directory it is stored in
// and the folder structures will be built out accordingly.
func (api objectAPIHandlers) PutObjectExtractHandler(w http.ResponseWriter, r *http.Request) {
	ctx := newContext(r, w, "PutObjectExtract")

- Client-go: informer stores now keep track the resourceVersion they are synced to (via add/update/delete events, or replace calls, or bookmark events), and provide a `LastStoreSyncResourceVersion` method to obtain this resource version. This method can return `""` if the store has not been synced to yet, and depends on the AtomicFIFO feature being enabled. ([#134827](https://github.com/kubernetes...

### Promoted CRD Validation Expression Language to Beta

        }
    }

    /**
     * Stores a document in the specified index.
     *
     * @param index the index name
     * @param obj   the document object to store
     * @return true if the document was stored successfully, false otherwise
     * @throws SearchEngineClientException if the store operation fails
     */
    public boolean store(final String index, final Object obj) {

- DRA: fixed several issues related to `allocationMode: all`. ([#127565](https://github.com/kubernetes/kubernetes/pull/127565), [@pohly](https://github.com/pohly))

    for (Entry<K, V> entry : result.entrySet()) {
      K key = entry.getKey();
      V value = entry.getValue();
      if (key == null || value == null) {
        // delay failure until non-null entries are stored
        nullsPresent = true;
      } else {
        put(key, value);
      }
    }

    if (nullsPresent) {
      globalStatsCounter.recordLoadException(stopwatch.elapsed(NANOSECONDS));

      <fields>
        <field>
          <name>directory</name>
          <version>3.0.0+</version>
          <description>Describe the directory where the resources are stored. The path is relative
            to the POM.</description>
          <type>String</type>
        </field>
      </fields>
      <codeSegments>
        <codeSegment>
          <version>4.0.0+</version>

    * Function is disabled by default and can be enabled via scheduler policy config file.
    * If no parametrization is specified in config file it defaults to one which gives score 10 to utilization 0 and score 0 to utilization 100.