# Release 2.12.1

### Bug Fixes and Other Changes

- Fixed a regression error when proxying responses from aggregated API servers, which could cause watch requests to hang until the first event was received. ([#75887](https://github.com/kubernetes/kubernetes/pull/75887), [@liggitt](https://github.com/liggitt))

* 📝 Add warning about lifecycle events with `AsyncClient`. PR [#4167](https://github.com/tiangolo/fastapi/pull/4167) by [@andrew-chang-dewitt](https://github.com/andrew-chang-dewitt).
* ✏️ Fix typos in `/docs/reference/exceptions.md` and `/en/docs/reference/status.md`. PR [#10809](https://github.com/tiangolo/fastapi/pull/10809) by [@clarencepenz](https://github.com/clarencepenz).

OkHttp 4.x Change Log
=====================

## Version 4.12.0

_2023-10-16_

 *  Fix: Don't hang taking headers for HTTP 103 responses.

 *  Fix: Recover gracefully when a cache entry's certificate is corrupted.

 *  Fix: Fail permanently when there's a failure loading the bundled public suffix database.
    This is the dataset that powers `HttpUrl.topPrivateDomain()`.

    being shut down.
 *  Fix: Don't drop headers of healthy streams that raced with `GOAWAY` frames.
    This bug would cause HTTP/2 streams to occasional hang when the connection
    was shutting down.
 *  Fix: Honor `OkHttpClient.retryOnConnectionFailure()` when the response is a
    HTTP 408 Request Timeout. If retries are enabled, OkHttp will retry exactly

* kubelet: resolved hang/timeout issues when running large numbers of pods with unique configmap/secret references ([#74755](https://github.com/kubernetes/kubernetes/pull/74755), [@liggitt](https://github.com/liggitt))

- [`KT-59082`](https://youtrack.jetbrains.com/issue/KT-59082) WASM: NullPointerException caused by companion with String type constants
- [`KT-58941`](https://youtrack.jetbrains.com/issue/KT-58941) WASM Hang with extension delegate inside a Class
- [`KT-60200`](https://youtrack.jetbrains.com/issue/KT-60200) K/Wasm: generate types without supertypes properly

 *  Fix: Don't leak file handles when a cache disk write fails.

 *  Fix: Don't hang when the public suffix database cannot be loaded. We had a bug where a failure
    reading the public suffix database would cause subsequent reads to hang when they should have
    crashed.

 *  Fix: Avoid `InetAddress.getCanonicalHostName()` in MockWebServer. This avoids problems if the

## Join the chat

Join the 👥 <a href="https://discord.gg/VQjSZaeJmf" class="external-link" target="_blank">Discord chat server</a> 👥 and hang out with others in the FastAPI community.

!!! tip

      fail<Any>()
    } catch (expected: ConnectException) {
    }
  }

  @Test
  fun shutdownWhileBlockedDispatching() {
    // Enqueue a request that'll cause MockWebServer to hang on QueueDispatcher.dispatch().
    val connection = server.url("/").toUrl().openConnection() as HttpURLConnection
    connection.setReadTimeout(500)
    try {
      connection.getResponseCode()
      fail<Any>()