*/
    @Override
    public void connect() throws IOException {
        if (isConnected() && tree.session.transport.tconHostName == null) {
            /* Tree thinks it is connected but transport disconnected
             * under it, reset tree to reflect the truth.
             */
            tree.treeDisconnect(true);
        }

        if (isConnected()) {

- Remove support for the Service `topologyKeys` field (alpha) and the `kube-proxy` implementation of it. This field was deprecated several cycles ago. This functionality is replaced by the combination of automatic topology hints per-endpoint (alpha) and the Service `internalTrafficPolicy` field (alpha). ([#102412](https://github.com/kubernetes/kubernetes/pull/102412), [@andrewsykim](https://github.com/andrewsykim))

* Cross-build hyperkube and debian-iptables for ARM. Also add a flannel image ([#21617](https://github.com/kubernetes/kubernetes/pull/21617), [@luxas](https://github.com/luxas))
* Add a timeout to the sshDialer to prevent indefinite hangs. ([#23843](https://github.com/kubernetes/kubernetes/pull/23843), [@cjcullen](https://github.com/cjcullen))

  }

  @Test
  fun serverDisconnectsPrematurelyWithNoLengthHeaders() {
    // Intentionally empty. This case doesn't make sense because there's no
    // such thing as a premature disconnect when the disconnect itself
    // indicates the end of the data stream.
  }

  private fun testServerPrematureDisconnect(transferKind: TransferKind) {

- Fixes spammy incorrect "Ignoring same-zone topology hints for service since no hints were provided for zone" messages in the kube-proxy logs. ([#133527](https://github.com/kubernetes/kubernetes/pull/133527), [@danwinship](https://github.com/danwinship)) [SIG Network]

   * of ~1/5000, meaning that the other thread's get() call nearly always completes within 20ms if
   * it's going to complete at all).
   *
   * <p>[*] To avoid hangs, I've disabled the in-thread calls. This makes the test take (very
   * roughly) 2.5s longer. (2.5s is also the maximum length of time we will wait for a timed get

   * of ~1/5000, meaning that the other thread's get() call nearly always completes within 20ms if
   * it's going to complete at all).
   *
   * <p>[*] To avoid hangs, I've disabled the in-thread calls. This makes the test take (very
   * roughly) 2.5s longer. (2.5s is also the maximum length of time we will wait for a timed get

                logger.error(() -> "Failed to flush " + stream(indices).get(stream -> stream.collect(Collectors.joining(", "))), e);
            }
        });

    }

    /**
     * Pings the search engine cluster to check connectivity and health.
     *
     * @return the ping response with cluster information
     * @throws SearchEngineClientException if the ping fails
     */

* kubelet to master communication when doing node status updates now has a timeout to prevent indefinite hangs ([#52176](https://github.com/kubernetes/kubernetes/pull/52176), [@liggitt](https://github.com/liggitt))

- Kubeadm: fix the bug that 'kubeadm upgrade' hangs in single node cluster ([#88434](https://github.com/kubernetes/kubernetes/pull/88434), [@SataQiu](https://github.com/SataQiu)) [SIG Cluster Lifecycle]