Apache Iceberg version

0.5.0 (latest release)

Please describe the bug 🐞

I'm actually using the 0.6.0rc4 version, but that shouldn't matter in this case.

During the ingestion process, I'm running parallel jobs with the following code:

# Create a namespace if it doesn't exist
try:
    catalog.create_namespace(ns_name)
    self.logger.info(f"Namespace '{ns_name}' created")
except NamespaceAlreadyExistsError:
    self.logger.info(f"Namespace '{ns_name}' already exists")

The first call goes through as expected since no namespace currently exists. But the second parallel call fails and throws both 404 and 409:

self._handle_non_200_response(exc, {404: NoSuchNamespaceError, 409: NamespaceAlreadyExistsError})

The expected behavior is to only throw 409 since 404 NoSuchNamespaceError doesn't make sense in the context of namespace creation.