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Type:
Bug
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Resolution: Fixed
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Priority:
Major - P3
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Affects Version/s: None
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Component/s: Spec Comp
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None
https://github.com/mongodb/specifications/blob/master/source/server-discovery-and-monitoring/server-discovery-and-monitoring.rst#checking-wire-protocol-compatibility does not explicitly say to exclude unknown servers from topology compatibility decision, but surely this needs to happen as an unknown server hasn't provided us with a wire version to consider.
Due to 1584 this is reported as
Mongo::Error::UnsupportedFeatures: Server at (localhost:27018) reports wire version (0), but this version of the Ruby driver requires at least (2).
... which is pretty confusing.