Status Code for `NamespaceNotEmpty` exception?

[connortsui20]

iceberg/open-api/rest-catalog-open-api.yaml

Lines 407 to 433 in 3dba6af

	summary: Drop a namespace from the catalog. Namespace must be empty.
	operationId: dropNamespace
	responses:
	204:
	description: Success, no content
	400:
	$ref: '#/components/responses/BadRequestErrorResponse'
	401:
	$ref: '#/components/responses/UnauthorizedResponse'
	403:
	$ref: '#/components/responses/ForbiddenResponse'
	404:
	description: Not Found - Namespace to delete does not exist.
	content:
	application/json:
	schema:
	$ref: '#/components/schemas/IcebergErrorResponse'
	examples:
	NoSuchNamespaceExample:
	$ref: '#/components/examples/NoSuchNamespaceError'
	419:
	$ref: '#/components/responses/AuthenticationTimeoutResponse'
	503:
	$ref: '#/components/responses/ServiceUnavailableResponse'
	5XX:
	$ref: '#/components/responses/ServerErrorResponse'

There doesn't seem to be a status code for responding with NamespaceNotEmpty, is this just a missing doc or is it actually not specified by the spec?

[Fokko]

I checked using PyIceberg against the Java rest-fixture (which comes from this repo), and it returns a 400:

[nastra]

It appears that we don't have a separate status code for NamespaceNotEmpty in the spec and as @Fokko already mentioned the server would return a 400. I've opened #12505 to properly propagate that 400 to NamespaceNotEmpty to the client

[connortsui20]

Thank you! Could you also update the yaml with a description that links that error to the 400 status code?

[nastra]

I've opened #12518 to improve the documentation in the spec on how this is handled. Thanks for reporting this issue