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  1. IL-0375 MongoDB Atlas cluster changes and alerts lagged for hours after a control plane metadata migration congested a database
    MongoDB2024
    Symptoms

    From 18:24 UTC on 3 June 2024, MongoDB Atlas cluster configuration changes in all commercial regions ran with delays of a few minutes to several hours. The delays hit changes requested through the API and changes from automated triggers such as auto-scaling and node replacement.

    Control plane lagMonitoring outageDatabase overload
    Trigger

    During planned internal maintenance, the metadata of an internal workflow management system that backs the Atlas control plane was migrated to a target database cluster, and traffic was redirected to that target.

    Root cause
    Capacity exhaustion
    Component
    Database
    Contributing factor
    Unrepresentative stagingIneffective rollback
    Remediation
    • Rolled back the metadata migration, reconciling data between the source and target databases
    • Executed recovery procedures, completing them at 00:09 UTC on 4 June, and kept monitoring closely
    Action items
    • Design a new metadata migration strategy that can roll back within 15 minutes of detecting a problem
    • Hold similar maintenance activities until the new procedure is implemented and tested
    View case
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By root cause1

Capacity exhaustion1 case

Component
Database
Contributing factor
Ineffective rollbackUnrepresentative staging
Organisation
MongoDB
  1. IL-0375 MongoDB Atlas cluster changes and alerts lagged for hours after a control plane metadata migration congested a database
    MongoDB2024