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Type: Task
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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: Sharding
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Fully Compatible
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Sharding 2018-12-31, Sharding 2019-01-14, Sharding 2019-01-28
Otherwise, in a split brained coordinator shard, the old coordinator primary might receive recoverCommit and find its local participant in prepare, because the new coordinator primary received coordinateCommit, had a stale ReplicaSetMonitor for itself, and sent prepareTransaction over the network to the old coordinator primary.