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Pods start normally but cannot be stopped, and the runtime reports "invalid version: the version is empty" from StopPodSandbox. What is missing?

  1. The Pod's terminationGracePeriodSeconds
  2. The version field in the CNI configuration file
  3. The portmap plugin in the CNI chain
  4. The node's default route
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Answer: B. The version field in the CNI configuration file

A CNI config with no declared version lets Pods start but fails teardown, leaving each Pod not ready with its network namespace still attached until the version is added.

Source: Troubleshooting CNI plugin-related errors (Kubernetes) — Failed to destroy network for sandbox error

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