## Changelog since v1.5.5

### Other notable changes

* kube-up (with gce/gci and gce/coreos providers) now ensures the authentication token file contains correct tokens for the control plane components, even if the file already exists (ensures upgrades and downgrades work successfully) ([#43676](https://github.com/kubernetes/kubernetes/pull/43676), [@liggitt](https://github.com/liggitt))

        if (this.transportContext.getConfig().isStrictResourceLifecycle()) {
            clearAttributeCache();
        }
    }

    /**
     * Ensures tree connection is established with optimized connection reuse.
     * @return active tree handle
     * @throws CIFSException if connection fails
     *
     */

- If upgrading Cluster Federation components from 1.3.x, please ensure your cluster name is a valid DNS label (#30956, @nikhiljindal)

    testClientPrematureDisconnect(TransferKind.END_OF_STREAM)
  }

  private fun testClientPrematureDisconnect(transferKind: TransferKind) {
    // Setting a low transfer speed ensures that stream discarding will time out.
    val builder =
      MockResponse
        .Builder()
        .throttleBody(6, 1, TimeUnit.SECONDS)
    transferKind.setBody(builder, "ABCDE\nFGHIJKLMNOPQRSTUVWXYZ", 1024)

     * Sum per-segment modCounts to avoid mis-reporting when elements are concurrently added and
     * removed in one segment while checking another, in which case the table was never actually
     * empty at any point. (The sum ensures accuracy up through at least 1<<31 per-segment
     * modifications before recheck.) Method containsValue() uses similar constructions for
     * stability checks.
     */
    long sum = 0L;

- Kubeadm: Ensured waiting for `apiserver` uses a local client that doesn't reach to the control plane endpoint and instead reaches directly to the local API server endpoint. ([#134265](https://github.com/kubernetes/kubernetes/pull/134265), [@neolit123](https://github.com/neolit123))...

        /* JCIFS will build a composite list of shares if the target host has
         * multiple IP addresses such as when domain-based DFS is in play. Because
         * of this, to ensure that we query each IP individually without re-resolving
         * the hostname and getting a different IP, we must use the current addresses
         * IP rather than just url.getHost() like we were using prior to 1.2.16.

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      // will be resized. That threshold is ceilingPowerOfTwo(capacity*loadFactor), where
      // loadFactor is 0.75 by default. So with the calculation here we ensure that the
      // threshold is equal to ceilingPowerOfTwo(expectedSize). There is a separate code
      // path when the first operation on the new map is putAll(otherMap). There, prior to

      // will be resized. That threshold is ceilingPowerOfTwo(capacity*loadFactor), where
      // loadFactor is 0.75 by default. So with the calculation here we ensure that the
      // threshold is equal to ceilingPowerOfTwo(expectedSize). There is a separate code
      // path when the first operation on the new map is putAll(otherMap). There, prior to