For upgrade/downgrade from 3.4 to 3.6 a few checks for featureCompatibilityVersion == k34 were added to the causal consistency codebase. These should be removed once 3.6 is released, before the next releases.
- depends on
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SERVER-29652 mongos should not gossip $logicalTime until admin.system.keys are created
- Closed
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SERVER-29654 Enable admin.system.keys generation and logicalTime processing on shards and config when featureCompatibilityVersion is 3.6
- Closed
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SERVER-29785 shards should not gossip $logicalTime and operationTime if FCV is set to 3.4
- Closed
- duplicates
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SERVER-32463 Determine and remove featureCompatibilityVersion-dependent Sharding code behavior that is only relevant to the 3.4-3.6 transition
- Closed