gContainerWrites returns false during FCV Transition to 9.0 despite being required to be on

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    • Type: Bug
    • Resolution: Fixed
    • Priority: Major - P3
    • 9.0.0-rc0
    • Affects Version/s: None
    • Component/s: None
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    • Query Execution
    • Fully Compatible
    • ALL
    • Storage Execution 2026-05-25, Storage Execution 2026-06-08, Storage Execution 2026-06-22
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      Similar to SERVER-124383 and SERVER-123599: gContainerWrites is an FCV-gated feature flag. FCVGatedFeatureFlag::isEnabled combines the flag's _enabled boolean with an FCV comparison, so a setForServerParameter(true) at startup flips _enabled but does not bypass the FCV gate. During the window between a binary upgrade to 9.0 and the subsequent FCV upgrade, the flag therefore reads as off even when configuration requires it to be on.

            Assignee:
            Parker Felix
            Reporter:
            Malik Endsley (Inactive)
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              Created:
              Updated:
              Resolved: