How To Fix >4510 - Duplicate (identical) locks deleted

SAP Error Message - Details

• Message type: E = Error

• Message class: >4 - SAP File Transfer Protocol

• Message number: 510

• Message text: Duplicate (identical) locks deleted

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message >4510 - Duplicate (identical) locks deleted ?

  The SAP error message "4510 Duplicate (identical) locks deleted" typically occurs in the context of SAP's lock management system. This message indicates that there were multiple identical lock entries for the same object, and the system has removed the duplicates to maintain data integrity and performance.
  Cause:
  
  Duplicate Lock Requests: This error often arises when multiple transactions or processes attempt to lock the same object simultaneously. If the locks are identical, the system will delete the duplicates to avoid unnecessary overhead.
  Programming Errors: In custom ABAP programs or enhancements, if locks are not managed properly (e.g., not checking if a lock already exists before attempting to create a new one), it can lead to this situation.
  Concurrency Issues: High levels of concurrency in a system can lead to multiple requests for the same lock, especially in environments with many users or automated processes.
  
  Solution:
  
  Review Lock Management: Check the code in custom programs or enhancements to ensure that locks are being managed correctly. Use the ENQUEUE and DEQUEUE function modules properly to avoid unnecessary lock requests.
  Optimize Locking Logic: Implement logic to check if a lock already exists before attempting to create a new one. This can help reduce the number of duplicate lock requests.
  Monitor System Performance: Use transaction codes like SM12 (to view lock entries) and SM21 (to check system logs) to monitor lock behavior and identify any patterns or issues.
  Adjust Concurrency Settings: If the issue is related to high concurrency, consider reviewing and adjusting the system's configuration to better handle simultaneous requests.
  Consult SAP Notes: Check the SAP Support Portal for any relevant notes or patches that may address this issue, especially if it is a known problem with a specific version of SAP.
  
  Related Information:
  
  Transaction Codes:
  
  SM12: Display and manage lock entries.
  SM21: System log for monitoring.
  SM37: Job monitoring, which can help identify if background jobs are causing lock contention.
  
  
  Documentation: Review SAP documentation on lock management and concurrency control for best practices.
  Performance Tuning: Consider performance tuning of the database and application layer to reduce contention for locks.
  
  If the problem persists after implementing these solutions, it may be beneficial to engage with SAP support for further assistance.