empty pod name leads to list pods for read namespaced pod endpoint

[pratikmallya]

What happened (please include outputs or screenshots):

When calling read_namespace_pod method with an empty string, we accidentally hit the list pods endpoint. This can cause unexpected behavior, such as OOMKills, if the number of pods in the cluster is very large.

What you expected to happen:
If an empty string is given, the client should always throw a 404

How to reproduce it (as minimally and precisely as possible):
set the log level of urllib3 to DEBUG

>>> logger = logging.getLogger("urllib3")
>>> logger.setLevel(logging.DEBUG)

then call the read_namespaced_pod method with an empty string. The log line looks like:

{"timestamp": "2025-04-07T06:16:11.008466+0000", "levelname": "debug", "filename": "connectionpool.py", "thread_name": "MainThread", "process": 602125, "lineno": 547, "message": "https://172.20.0.1:443 \"GET /api/v1/namespaces/dbt-cloud/pods/ HTTP/1.1\" 200 None",}

Anything else we need to know?:

Environment:

• Kubernetes version (kubectl version):
• OS (e.g., MacOS 10.13.6):
• Python version (python --version)
• Python client version (pip list | grep kubernetes): 29.0.0

[yliaog]

this works as expected, the k8s API server returns the list of pods for the following API request:

GET https://server_IP/api/v1/namespaces/default/pods