Contrib.social

Revision Manager Duplicate Entry

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Created on 25 August 2025, 5 days ago

Problem/Motivation

The revision_manager module has a race condition in QueueGenerator::enqueueIfUnique()
method. Multiple processes (cron runs, batch operations, manual triggers) can
simultaneously attempt to queue the same entity for revision cleanup, causing:

  • Process A checks if key exists → FALSE
  • Process B checks if key exists → FALSE
  • Both processes attempt to INSERT the same primary key → Database constraint violation

Proposed resolution

Add exception handling to gracefully handle the duplicate key scenario:

  • Catch Duplicate entry database exceptions
  • Return FALSE to indicate item was already queued by another process
  • Maintain existing error handling for other exception types
🐛 Bug report
Status

Active

Version

1.0

Component

Code

Created by

🇺🇸United States j-barnes

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