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  1. Core Server
  2. SERVER-52521

disallow downgrades in the presence of time-series collections

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Details

    • Icon: Task Task
    • Resolution: Fixed
    • Icon: Major - P3 Major - P3
    • 4.9.0
    • None
    • Storage
    • None
    • Fully Compatible
    • Execution Team 2020-11-16, Execution Team 2020-11-30

    Description

      Time-series collections are incompatible with earlier versions of MongoDB and must be dropped before downgrading. Creation of time-series collections requires a fully upgraded system that successfully ran the setFeatureCompatibilityVersion: "5.0" command.
      Attempted downgrade using setFeatureCompatibilityVersion: "4.4" in presence of time-series collections results in an error.
      Starting an older mongod with datafiles from a new mongod that supports time-series collections, the regular FCV mechanism provides a descriptive error message.

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            benety.goh@mongodb.com Benety Goh
            benety.goh@mongodb.com Benety Goh
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              Updated:
              Resolved: