mongodb replication_error ai_generated true

OplogOutOfOrderError: replication window insufficient

ID: mongodb/oplog-window-too-small

Also available as: JSON · Markdown
78%Fix Rate
82%Confidence
3Evidence
2023-01-01First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
7 active — — —

Root Cause

Secondary fell behind and oplog window is too small to catch up.

generic

Workarounds

  1. 90% success Increase oplog size: db.adminCommand({replSetResizeOplog:1, size:10000})
  2. 85% success Monitor replication lag and oplog window size regularly

Dead Ends

Common approaches that don't work:

  1. Delete secondary data and resync 70% fail

    Very slow for large databases

  2. Increase oplog to fill entire disk 72% fail

    Disk space for data reduced