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  1. Core Server
  2. SERVER-46858

[4.2] Start WT in read only mode if the 'recoverToOplogTimestamp' flag is missing for queryable backup

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    Details

    • Type: Bug
    • Status: Closed
    • Priority: Major - P3
    • Resolution: Fixed
    • Affects Version/s: 4.2.4
    • Fix Version/s: 4.2.5
    • Component/s: Storage
    • Labels:
      None
    • Backwards Compatibility:
      Fully Compatible
    • Operating System:
      ALL
    • Sprint:
      Execution Team 2020-03-23

      Description

      This only affects 4.2.4 binaries running with FCV 4.0. With FCV 4.0, we don't use WiredTiger checkpoints for backups. But when we start-up with queryable backup mode, WiredTiger will use the callbacks for the writeable API implemented in 4.2.4 when it shouldn't.

       

      On 4.2.4 binaries with FCV 4.0, the recommended workaround is to add these options to the config:

      • storage.wiredTiger.engineConfig.configString: ",readonly=true,"
      • storage.journal.enabled: false

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            Assignee:
            gregory.wlodarek Gregory Wlodarek
            Reporter:
            gregory.wlodarek Gregory Wlodarek
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              Updated:
              Resolved: