How To Fix OPS_SE_APPL_SHP110 - Exactly-once request cannot be locked: &1 (error code &2)

SAP Error Message - Details

• Message type: E = Error

• Message class: OPS_SE_APPL_SHP - Proxy Messages for Delivery Services

• Message number: 110

• Message text: Exactly-once request cannot be locked: &1 (error code &2)

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message OPS_SE_APPL_SHP110 - Exactly-once request cannot be locked: &1 (error code &2) ?

  The SAP error message OPS_SE_APPL_SHP110, which states "Exactly-once request cannot be locked: &1 (error code &2)," typically occurs in the context of the SAP Application Interface Framework (AIF) or when dealing with message processing in SAP systems. This error indicates that the system is unable to lock a specific request for processing, which is necessary for ensuring that the request is handled exactly once.
  Cause:
  
  Concurrency Issues: The error often arises when multiple processes or threads attempt to access the same request simultaneously, leading to a locking conflict.
  Database Locking: The request may be locked by another transaction or process, preventing the current process from acquiring the necessary lock.
  Configuration Issues: There may be misconfigurations in the AIF settings or in the way the requests are being processed.
  Long-running Transactions: If a previous transaction is taking too long to complete, it may hold the lock longer than expected.
  
  Solution:
  
  Check for Lock Entries: Use transaction code SM12 to check for any existing lock entries related to the request. If you find locks that are no longer needed, you can delete them (with caution).
  Review Application Logs: Check the application logs (transaction SLG1) for more details on the error and to identify which process is holding the lock.
  Adjust Concurrency Settings: If applicable, review and adjust the concurrency settings in the AIF configuration to minimize locking conflicts.
  Retry Mechanism: Implement a retry mechanism in your processing logic to handle transient locking issues gracefully.
  Performance Tuning: Optimize the performance of the transactions that are locking the requests to reduce the time they hold locks.
  Consult SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide patches or updates that could resolve the issue.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as SM12 (for lock entries), SLG1 (for application logs), and SM21 (for system logs).
  SAP Documentation: Review the official SAP documentation for the Application Interface Framework and locking mechanisms to understand how they work and best practices for configuration.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they have found effective.
  
  If the problem persists after trying the above solutions, it may be necessary to involve your SAP Basis team or SAP support for further investigation.