There are many instances in our UUID handling that have special exceptions for the system.namespaces and system.indexes collections. Most, if not all, of this handling references tickets SERVER-29926 and/or SERVER-30095 in comments. Since MMAP is being removed for 4.2, this special UUID handling should be removed as well.
- is related to
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SERVER-29926 system.indexes collection should have a UUID when UUIDs are enabled and featureCompatibilityVersion is 3.6
- Closed
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SERVER-30095 system.namespaces collection should have a UUID when UUIDs are enabled and featureCompatibilityVersion is 3.6
- Closed