How To Fix TRM_ESOA028 - Exactly-once request cannot be locked: &1 (error code: &2)

SAP Error Message - Details

• Message type: E = Error

• Message class: TRM_ESOA - Message Class for Tax and Revenue Management Services

• Message number: 028

• 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 TRM_ESOA028 - Exactly-once request cannot be locked: &1 (error code: &2) ?

  The SAP error message TRM_ESOA028, which states "Exactly-once request cannot be locked: &1 (error code: &2)," typically occurs in the context of SAP Process Integration (PI) or SAP Process Orchestration (PO) when there is an issue with the locking mechanism for exactly-once processing of messages. This error indicates that the system is unable to lock a specific request for processing, which is essential for ensuring that messages are processed exactly once without duplication.
  Causes:
  
  Concurrency Issues: The error may arise when multiple processes attempt to access the same request simultaneously, leading to a conflict in locking.
  Database Locking: The underlying database may have locks that prevent the request from being locked for processing.
  Configuration Issues: Incorrect configuration settings in the SAP PI/PO system can lead to locking problems.
  System Performance: High system load or performance issues can lead to timeouts or failures in acquiring locks.
  Message Processing Errors: If a previous message processing attempt failed, it might leave the request in a locked state.
  
  Solutions:
  
  Check for Concurrent Processes: Investigate if there are multiple instances trying to process the same request. Ensure that only one instance is attempting to lock the request at a time.
  Database Lock Monitoring: Use transaction codes like SM12 to check for any existing locks on the database that might be preventing the request from being locked. If necessary, release any unnecessary locks.
  Review Configuration: Ensure that the configuration settings for the integration scenario are correct. This includes checking the settings for exactly-once processing.
  System Performance Monitoring: Monitor system performance and load. If the system is under heavy load, consider optimizing performance or scheduling processing during off-peak hours.
  Error Handling: Implement proper error handling in your integration flows to manage failures gracefully and avoid leaving requests in a locked state.
  Restart the Integration Process: If the issue persists, consider restarting the integration process or the relevant services to clear any temporary issues.
  
  Related Information:
  
  SAP Notes: Check SAP Notes related to TRM_ESOA028 for any specific patches or updates that may address this issue.
  Documentation: Review SAP documentation on exactly-once processing and locking mechanisms in SAP PI/PO for a deeper understanding of how to configure and troubleshoot these scenarios.
  Support: If the issue cannot be resolved, consider reaching out to SAP Support for assistance, providing them with detailed logs and error messages for further analysis.
  
  By following these steps, you should be able to diagnose and resolve the TRM_ESOA028 error effectively.