fail the call.


## Version 4.1.1

_2019-09-05_

 *  Fix: Don't drop repeated headers when validating cached responses. In our Kotlin upgrade we
    introduced a regression where we iterated the number of unique header names rather than then
    number of unique headers. If you're using OkHttp's response cache this may impact you.


## Version 4.1.0

_2019-08-12_

    HTTP/1.1. We also reimplemented our websocket client to use this new mechanism.

 *  New: The `okhttp-zstd` module negotiates [Zstandard (zstd)][zstd] compression with servers that
    support it. It integrates a new (unstable) [ZSTD-KMP] library, also from Square. Enable it like
    this:

    ```kotlin
    val client = OkHttpClient.Builder()
      .addInterceptor(CompressionInterceptor(Zstd, Gzip))
      .build()

Extensions API group): Kubernetes can schedule a service (such as a logging
agent) that runs one, and only one, pod per node.
     * TLS and L7 support (Ingress API (Beta) in the Extensions API group): Kubernetes
is now easier to integrate into custom networking environments by supporting
TLS for secure communication and L7 http-based traffic routing.
     * Graceful Node Shutdown (aka drain) - The new “kubectl drain” command gracefully

    interval of 30 seconds is reasonable for most use cases.

 *  **OkHttp now supports [Conscrypt][conscrypt].** Conscrypt is a Java Security
    Provider that integrates BoringSSL into the Java platform. Conscrypt
    supports more cipher suites than the JVM’s default provider and may also
    execute more efficiently.

  - [alpha] Kubelet launches container in a per pod cgroup hierarchy based on quality of service tier ([kubernetes/features#126](https://github.com/kubernetes/enhancements/issues/126))
  - [beta] Kubelet integrates with memcg notification API to detect when a hard eviction threshold is crossed ([kubernetes/features#125](https://github.com/kubernetes/enhancements/issues/125))

  * Remove the `--enable-cri` flag. CRI is now the default, and the only way to integrate with Kubelet for the container runtimes.([#45194](https://github.com/kubernetes/kubernetes/pull/45194), [@yujuhong](https://github.com/yujuhong))

*   Other:
    *   tf.py_func now reports the full stack trace if an exception occurs.
    *   Integrate `TPUClusterResolver` with GKE's integration for Cloud TPUs.
    *   Add a library for statistical testing of samplers.
    *   Add Helpers to stream data from the GCE VM to a Cloud TPU.
    *   Integrate ClusterResolvers with TPUEstimator.
    *   Unify metropolis_hastings interface with HMC kernel.

    *   Make crictl command more user friendly and add more subcommands.
    *   Integrate with CRI verbose option to provide extra debug information.
    *   Update CRI to kubernetes v1.9.
    *   Bug fixes in validation test suites.

## What's New (Major Themes)

### Removal of several beta Kubernetes APIs