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# Release 2.12.1

### Bug Fixes and Other Changes

<div style="text-align: right; margin-right: 10%;">Kevin Glisson, Marc Vilanova, Forest Monsen - <strong>Netflix</strong> <a href="https://netflixtechblog.com/introducing-dispatch-da4b8a2a8072" target="_blank"><small>(ref)</small></a></div>

---

"_Tôi vô cùng hào hứng về **FastAPI**. Nó rất thú vị_"

    // At 0ms the server sends 3 unexpected pongs. The client accepts 'em and ignores em.
    server.webSocket!!.pong("pong 1".encodeUtf8())
    client.processNextFrame()
    server.webSocket!!.pong("pong 2".encodeUtf8())
    client.processNextFrame()
    taskFaker.runTasks()
    server.webSocket!!.pong("pong 3".encodeUtf8())
    client.processNextFrame()

    @Override
    public boolean awaitTermination(long timeout, TimeUnit unit) throws InterruptedException {
      long nanos = unit.toNanos(timeout);
      synchronized (lock) {
        while (true) {
          if (shutdown && runningTasks == 0) {
            return true;
          } else if (nanos <= 0) {
            return false;
          } else {
            long now = System.nanoTime();

    SettableFuture<Long> future1 = SettableFuture.create();
    SettableFuture<Long> future2 = SettableFuture.create();
    SettableFuture<Long> future3 = SettableFuture.create();
    SettableFuture<Long> future4 = SettableFuture.create();
    SettableFuture<Long> future5 = SettableFuture.create();

    ImmutableList<ListenableFuture<Long>> futures =
        inCompletionOrder(

 *  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

    SettableFuture<Long> future1 = SettableFuture.create();
    SettableFuture<Long> future2 = SettableFuture.create();
    SettableFuture<Long> future3 = SettableFuture.create();
    SettableFuture<Long> future4 = SettableFuture.create();
    SettableFuture<Long> future5 = SettableFuture.create();

    ImmutableList<ListenableFuture<Long>> futures =
        inCompletionOrder(

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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

    }

    @Override
    @CheckForNull
    public Long previous(Long value) {
      long l = value;
      return (l == Long.MIN_VALUE) ? null : l - 1;
    }

    @Override
    Long offset(Long origin, long distance) {
      checkNonnegative(distance, "distance");
      long result = origin + distance;
      if (result < 0) {
        checkArgument(origin < 0, "overflow");
      }