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MongoDB · Database Server & Atlas
MongoDB server reported: Too Many Logical Sessions.
Quick Answer
Error code 179 on your MongoDB Database Server & Atlas means: MongoDB server reported: Too Many Logical Sessions.. 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 179 (TooManyLogicalSessions) while processing this request path.
  2. Transaction/session lifecycle moved to a conflicting state before completion.
  3. Atomic commit/abort guarantees could not be upheld for the in-flight operation.
How to Fix It
1
Review logs/telemetry for code 179 (TooManyLogicalSessions) and capture the exact command and parameters that triggered it.
2
Review coordinator logs to distinguish retriable aborts from terminal state conflicts.
3
Load full transaction/session trace to identify the exact conflicting transition.
4
Retry the whole transaction flow (not partial fragments) with idempotent boundaries.
5
Add monitoring for recurring TooManyLogicalSessions events so future incidents are detected and triaged faster.
Pro Tip
This issue typically requires professional diagnosis. Attempting this fix without proper training could cause further problems.
Related Error Codes
12456
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