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M
42
Moderate
MongoDB · Database Server & Atlas
MongoDB server reported: Log Write Failed.
Quick Answer
Error code 42 on your MongoDB Database Server & Atlas means: MongoDB server reported: Log Write Failed.. This is usually fixable — see the step-by-step guide below.
Affected Models
Applies to all models
MONGO-ATLAS-DEDICATEDMONGO-ATLAS-SERVERLESSMONGO-COMM-6.0MONGO-COMM-7.0MONGO-COMM-8.0MONGO-ENT-6.0MONGO-ENT-7.0MONGO-ENT-8.0
Likely Causes
  1. MongoDB returned code 42 (LogWriteFailed) while processing this request path.
  2. An internal runtime condition interrupted normal command execution.
  3. Server/client state drift caused an unexpected execution-path failure.
How to Fix It
1
Review logs/telemetry for code 42 (LogWriteFailed) and capture the exact command and parameters that triggered it.
2
Escalate recurring failures with reproducible traces and version/build details.
3
Collect server/client logs with request IDs and stack context for the failing call.
4
Retry once after confirming system health and dependency availability.
5
Add monitoring for recurring LogWriteFailed events so future incidents are detected and triaged faster.
Pro Tip
This fix requires some technical knowledge. If you're unsure about any step, consider contacting support or a qualified technician.
Related Error Codes
12456
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