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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: None
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Fully Compatible
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ALL
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v5.1, v5.0
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Replication 2021-11-29
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119
Collections cloned and indexes built before the admin.system.version collection will default to the lower FCV behavior because it will not have been initialized yet. See SERVER-48054 for a concrete example of how this introduces a bug.
This has the potential to further introduce problems. Collection and index formats have the potential to be based on the FCV. We want to be able to assume our data is in a particular format if the FCV is set to a specific version, and at the moment that is not possible.
To be safe and to avoid future bugs, we should clone this collection first.
- is related to
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SERVER-48054 4.2 nodes that use auth and initial sync will fail to start in 4.4
- Closed
- related to
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SERVER-31102 Clone admin.system.version first in initial sync, fail sync if FCV changes
- Closed
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SERVER-79269 Invariant that we don't check FCV in oplog application
- Open