istio.io/content/zh/docs/reference/config/analysis/ist0112/index.md

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VirtualServiceDestinationPortSelectorRequired analysis-message

This message occurs when a virtual service routes to a service with more than one port exposed, but does not specify which one to use. This ambiguity can lead to undefined behavior.

To fix, add a port to the virtual service Destination to disambiguate which service port should be routed to.