* fixed bugs and improved performance in Stackdriver Sink
* fluentd-gcp addon: Fix a bug in the event-exporter, when repeated events were not sent to Stackdriver. ([#50511](https://github.com/kubernetes/kubernetes/pull/50511), [@crassirostris](https://github.com/crassirostris))

    
    private void monitorRegistrations() {
        for (WitnessRegistration registration : registrations.values()) {
            if (registration.getState() == WitnessRegistrationState.REGISTERED) {
                // Send periodic heartbeat
                sendHeartbeat(registration);
            }
        }
    }
    
    private void sendHeartbeat(WitnessRegistration registration) {
        try {

            final List<AvPair> avPairs = ntlmClientChallengeInfo != null ? AvPairs.decode(ntlmClientChallengeInfo) : null;

            // if targetInfo has an MsvAvTimestamp
            // client should not send LmChallengeResponse
            final boolean haveTimestamp = AvPairs.contains(avPairs, AvPair.MsvAvTimestamp);
            if (!haveTimestamp) {
                final byte[] lmClientChallenge = new byte[8];

   * public class FooTest {
   *
   *   private static final class FooFactoryForTest {
   *     public static Foo create(String a, String b, int c, boolean d) {
   *       return Foo.builder()
   *           .setA(a)
   *           .setB(b)
   *           .setC(c)
   *           .setD(d)
   *           .build();
   *     }
   *   }
   *
   *   public void testEquals() {
   *     new ClassSanityTester()

inclusion in the Work by the copyright owner or by an individual or Legal Entity authorized to submit on behalf of the copyright owner. For the purposes of this definition, "submitted" means any form of electronic, verbal, or written communication sent to the Licensor or its representatives, including but not limited to communication on electronic mailing lists, source code control systems, and issue tracking systems that are managed by, or on behalf of, the Licensor for the purpose of discussing...

      reader.nextFrame(requireSettings = false, BaseTestHandler())
    }.also { expected ->
      assertThat(expected.message).isEqualTo("PROTOCOL_ERROR: TYPE_DATA streamId == 0")
    }
  }

  /** We do not send SETTINGS_COMPRESS_DATA = 1, nor want to. Let's make sure we error.  */
  @Test fun compressedDataFrameWhenSettingDisabled() {
    val expectedData = ByteArray(Http2.INITIAL_MAX_FRAME_SIZE)
    Arrays.fill(expectedData, 2.toByte())

        // When
        int size = response.getReceiveBufferSize();

        // Then
        assertEquals(131072, size);
    }

    @Test
    @DisplayName("Should return send buffer size")
    void testGetSendBufferSize() throws Exception {
        // Given
        setPrivateField(response, "maxWriteSize", 131072);

        // When
        int size = response.getSendBufferSize();

- The `AdmissionReview` API sent to and received from admission webhooks has been promoted to `admission.k8s.io/v1`. Webhooks can specify a preference for receiving `v1` AdmissionReview objects with `admissionReviewVersions: ["v1","v1beta1"]`, and must respond with an API object in the same `apiVersion` they are sent. When webhooks use `admission.k8s.io/v1`, the following additional validation is performed on their responses:...

    segment.setTableEntryForTesting(0, entry);
    // don't increment count; this is used during computation
    assertTrue(segment.clearValueForTesting(key, hash, valueRef));
    // no notification sent with clearValue
    assertEquals(0, segment.count);
    assertThat(table.get(0)).isNull();

    // clear wrong value reference
    segment.setTableEntryForTesting(0, entry);

    segment.setTableEntryForTesting(0, entry);
    // don't increment count; this is used during computation
    assertTrue(segment.clearValueForTesting(key, hash, valueRef));
    // no notification sent with clearValue
    assertEquals(0, segment.count);
    assertThat(table.get(0)).isNull();

    // clear wrong value reference
    segment.setTableEntryForTesting(0, entry);