- Scheduler now waits for handlers to finish syncing before the scheduling cycles start. ([#116729](https://github.com/kubernetes/kubernetes/pull/116729), [@AxeZhan](https://github.com/AxeZhan))

- KCCM: fixed transient node addition and removal caused by #121090 while syncing load balancers on large clusters with a lot of churn. ([#121091](https://github.com/kubernetes/kubernetes/pull/121091), [@alexanderConstantinescu](https://github.com/alexanderConstantinescu))

- A new feature was enabled to improve the performance of the iptables mode of `kube-proxy` in large clusters. No action was required, however:
  

  // record, attempting to checkpoint the payload associated with Spec.ConfigSource, attempting
  // to load or validate the Assigned config, etc.
  // Errors may occur at different points while syncing config. Earlier errors (e.g. download or
  // checkpointing errors) will not result in a rollback to LastKnownGood, and may resolve across

- Disruption controller shouldn't error while syncing for unmanaged pods. ([#103414](https://github.com/kubernetes/kubernetes/pull/103414), [@ravisantoshgudimetla](https://github.com/ravisantoshgudimetla)) [SIG Apps and Testing]

- Increased the maximum backoff delay of the endpointslice controller to match the expected sequence of delays when syncing Services. ([#112353](https://github.com/kubernetes/kubernetes/pull/112353), [@dgrisonnet](https://github.com/dgrisonnet))

* kubeadm: fix a possible panic when joining a new control plane node in HA scenarios ([#72123](https://github.com/kubernetes/kubernetes/pull/72123), [@anitgandhi](https://github.com/anitgandhi))
* kubeadm: fix a bug when syncing etcd endpoints ([#71945](https://github.com/kubernetes/kubernetes/pull/71945), [@pytimer](https://github.com/pytimer))



# v1.13.1

[Documentation](https://docs.k8s.io)

## Downloads for v1.13.1

- Fixed performance regression in JSON logging caused by syncing stdout every time error was logged. ([#107035](https://github.com/kubernetes/kubernetes/pull/107035), [@serathius](https://github.com/serathius))

* Update to use go1.11.3 with fix for CVE-2018-16875 ([#72035](https://github.com/kubernetes/kubernetes/pull/72035), [@seemethere](https://github.com/seemethere))
* kubeadm: fix a bug when syncing etcd endpoints ([#71945](https://github.com/kubernetes/kubernetes/pull/71945), [@pytimer](https://github.com/pytimer))

* [fluentd-gcp addon] Fluentd will trim lines exceeding 100KB instead of dropping them. ([#52289](https://github.com/kubernetes/kubernetes/pull/52289), [@crassirostris](https://github.com/crassirostris))
* dockershim: check the error when syncing the checkpoint. ([#52125](https://github.com/kubernetes/kubernetes/pull/52125), [@yujuhong](https://github.com/yujuhong))