[2.3.0] Checkmk Werk 16440 created: kube: ValueError: not enough values to unpack

[//]: # (werk v2) # kube: ValueError: not enough values to unpack key | value ---------- | --- date | 2024-07-12T12:02:32+00:00 version | 2.3.0p10 class | fix edition | cre component | checks level | 1 compatible | yes This error affects users, which use the `Kubernetes` special agent, and have enabled the option `Persistent Volume Claims`. It is a regression, which was introduced in Checkmk version 2.3.0. Previously, the agent could crash with the following error. ``` File "/omd/sites/cmksite/lib/python3/cmk/special_agents/utils_kubernetes/transform_any.py", line 39, in _parse_metric_sample_with_labels value_string, *_optional_timestamp = timestamped_value.strip().split() ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ValueError: not enough values to unpack (expected at least 1, got 0) ``` This error occured sporadically, if the agent was unable to contact the `kubelet` via the Kubernets API. The error is now reported via the `Kubelet` Service. This is the same behaviour as in Checkmk 2.2.0.