Die Statuscodes im 400er-Bereich bedeuten hingegen, dass es einen Fehler gab.

Erinnern Sie sich an all diese **404 Not Found** Fehler (und Witze)?

## `HTTPException` verwenden

Um HTTP-Responses mit Fehlern zum Client zurückzugeben, verwenden Sie `HTTPException`.

  // policy allows the lifecycle to be altered, for example by deleting persistent
  // volume claims when their stateful set is deleted, or when their pod is scaled
  // down. This requires the StatefulSetAutoDeletePVC feature gate to be enabled,
  // which is alpha.  +optional
  optional StatefulSetPersistentVolumeClaimRetentionPolicy persistentVolumeClaimRetentionPolicy = 10;

  optional int32 minReadySeconds = 9;

  // PersistentVolumeClaimRetentionPolicy describes the policy used for PVCs created from
  // the StatefulSet VolumeClaimTemplates. This requires the
  // StatefulSetAutoDeletePVC feature gate to be enabled, which is alpha.
  // +optional
  optional StatefulSetPersistentVolumeClaimRetentionPolicy persistentVolumeClaimRetentionPolicy = 10;

  // ordinals controls the numbering of replica indices in a StatefulSet. The

  //   in any namespaces.
  // (Beta) Using this field requires the AnyVolumeDataSource feature gate to be enabled.
  // (Alpha) Using the namespace field of dataSourceRef requires the CrossNamespaceVolumeDataSource feature gate to be enabled.
  // +optional
  optional TypedObjectReference dataSourceRef = 8;
}

* Use of the alpha initializers feature now requires enabling the `Initializers` feature gate. This feature gate is auto-enabled if the `Initialzers` admission plugin is enabled. ([#51436](https://github.com/kubernetes/kubernetes/pull/51436), [@liggitt](https://github.com/liggitt))

                     pass -XepCompilingTestOnlyCode, and that argument needs to
                     be passed as part of the same <arg> as -Xplugin:ErrorProne,
                     and I gave up trying to figure out how to do that for test
                     compilation only. -->
                <arg>-Xplugin:ErrorProne -Xep:NullArgumentForNonNullParameter:OFF -Xep:Java8ApiChecker:ERROR</arg>

      long unused = simpleBinomial(LongMath.biggestSimpleBinomials[k], k); // mustn't throw
      if (LongMath.biggestSimpleBinomials[k] < Integer.MAX_VALUE) {
        // unless all n are fair game with this k
        try {
          simpleBinomial(LongMath.biggestSimpleBinomials[k] + 1, k);
          fail("Expected ArithmeticException");
        } catch (ArithmeticException expected) {
        }
      }

- a new `EndpointSliceProxying` feature gate has been added to control the use of EndpointSlices in kube-proxy. The EndpointSlice feature gate that used to control this behavior no longer affects kube-proxy. This feature has been disabled by default. ([#86137](https://github.com/kubernetes/kubernetes/pull/86137), [@robscott](https://github.com/robscott))...

* Use of the alpha initializers feature now requires enabling the `Initializers` feature gate. This feature gate is automatically enabled if the `Initializers` admission plugin is enabled.([#51436](https://github.com/kubernetes/kubernetes/pull/51436))

### Anote sua versão `fastapi`

A primeira coisa que você deve fazer é "fixar" a versão do **FastAPI** que está utilizando para a última versão específica que você sabe que funciona corretamente para a sua aplicação.

Por exemplo, vamos dizer que você esteja utilizando a versão `0.45.0` no seu _app_.

Se você usa um arquivo `requirements.txt`, dá para especificar a versão assim:

```txt