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Type: Bug
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Resolution: Won't Fix
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Priority: Major - P3
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None
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Affects Version/s: 4.2.0-rc8
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Component/s: Sharding
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Labels:None
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ALL
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Sharding 2019-08-26, Sharding 2019-09-09
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22
setFeatureCompatibilityVersion command can return before all the nodes in config cluster are downgraded as this is tied to writing the featureCompatibilityVersion document.
The follow-up attempt to connect to all config shard nodes can fail the mongos when it attempts to refresh shardRegistry