* etcd3: make gets for previous value in watch serialize-able ([#34089](https://github.com/kubernetes/kubernetes/pull/34089), [@wojtek-t](https://github.com/wojtek-t))
* etcd3: minor cleanups ([#34234](https://github.com/kubernetes/kubernetes/pull/34234), [@wojtek-t](https://github.com/wojtek-t))

    - [Deprecation](#deprecation)
    - [API Change](#api-change)
    - [Feature](#feature)
    - [Documentation](#documentation)
    - [Bug or Regression](#bug-or-regression)
    - [Other (Cleanup or Flake)](#other-cleanup-or-flake)
  - [Dependencies](#dependencies)
    - [Added](#added)
    - [Changed](#changed)
    - [Removed](#removed)
- [v1.35.0-rc.1](#v1350-rc1)
  - [Downloads for v1.35.0-rc.1](#downloads-for-v1350-rc1)

      return false;
    }

    /**
     * Performs routine cleanup following a read. Normally cleanup happens during writes. If cleanup
     * is not observed after a sufficient number of reads, try cleaning up from the read thread.
     */
    void postReadCleanup() {
      if ((readCount.incrementAndGet() & DRAIN_THRESHOLD) == 0) {
        cleanUp();
      }
    }

    /**

    // can't compare map contents until cleanup occurs

    for (int i = 1; i <= originalCount * 2; i *= 2) {
      if (i > 1) {
        segment.expand();
      }
      assertThat(segment.table.length()).isEqualTo(i);
      assertThat(countLiveEntries(map, 0)).isEqualTo(liveCount);
      // expansion cleanup is sloppy, with a goal of avoiding unnecessary copies

    // can't compare map contents until cleanup occurs

    for (int i = 1; i <= originalCount * 2; i *= 2) {
      if (i > 1) {
        segment.expand();
      }
      assertThat(segment.table.length()).isEqualTo(i);
      assertThat(countLiveEntries(map, 0)).isEqualTo(liveCount);
      // expansion cleanup is sloppy, with a goal of avoiding unnecessary copies

                th.close();
            } else {
                // Let connection pooling handle cleanup - this improves performance
                // for scenarios where the same file or directory is accessed multiple times
                log.trace("Tree handle released to connection pool for reuse");
                // The connection pool will handle cleanup based on its own timeout settings
            }
        }

* Update cluster-proportional-autoscaler, etcd-empty-dir-cleanup, fluentd-gcp, and kube-addon-manager addons with refreshed base images containing fixes for CVE-2015-8271, CVE-2016-7543, CVE-2016-9841, CVE-2016-9843, CVE-2017-1000366, CVE-2017-2616, and CVE-2017-7507. ([#48011](https://github.com/kubernetes/ku...