How To Fix OPS_SE_WM_XI_PROXY029 - exactly once request: enqueue failure: &

SAP Error Message - Details

• Message type: E = Error

• Message class: OPS_SE_WM_XI_PROXY - Message class for XI WM messages

• Message number: 029

• Message text: exactly once request: enqueue failure: &

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message OPS_SE_WM_XI_PROXY029 - exactly once request: enqueue failure: & ?

  The SAP error message OPS_SE_WM_XI_PROXY029 indicates an "enqueue failure" related to the "exactly once" processing of messages in the SAP system. This error typically occurs in scenarios involving the SAP Process Integration (PI) or SAP Process Orchestration (PO) when the system is trying to ensure that a message is processed exactly once, but it encounters an issue with the enqueue mechanism.
  Cause:
  
  
  Locking Issues: The error usually arises when the system is unable to acquire a lock on the required resources. This can happen if:
  
  Another process is holding the lock.
  There is a deadlock situation.
  The enqueue server is not functioning properly.
  
  
  
  System Performance: High system load or performance issues can lead to delays in acquiring locks, resulting in enqueue failures.
  
  
  Configuration Issues: Incorrect configuration of the message processing or enqueue settings can also lead to this error.
  
  
  Database Issues: Problems with the underlying database, such as connectivity issues or performance bottlenecks, can affect the enqueue mechanism.
  
  
  Solution:
  
  
  Check Lock Status: Use transaction SM12 to check for existing locks. If you find locks that are no longer needed, you can delete them (if you are sure they are stale).
  
  
  Monitor System Performance: Use transaction ST22 to check for dumps and SM66 to monitor active processes. If the system is under heavy load, consider optimizing performance or scaling resources.
  
  
  Review Configuration: Ensure that the configuration for the message processing and enqueue settings is correct. This may involve checking the settings in the Integration Directory or the relevant configuration in the SAP system.
  
  
  Restart Enqueue Server: If the enqueue server is not functioning properly, you may need to restart it. This can be done through transaction SM50 or by using the appropriate administrative tools.
  
  
  Check for Deadlocks: Investigate if there are any deadlocks in the system that might be causing the enqueue failure. You can use transaction SM21 to check the system log for any related messages.
  
  
  Database Health Check: Ensure that the database is healthy and that there are no connectivity issues. You may need to work with your database administrator to resolve any underlying database issues.
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide additional troubleshooting steps.
  Documentation: Review the SAP documentation for Process Integration/Orchestration for best practices on configuring exactly once processing.
  Support: If the issue persists, consider reaching out to SAP Support for further assistance, providing them with detailed logs and error messages.
  
  By following these steps, you should be able to diagnose and resolve the enqueue failure associated with the OPS_SE_WM_XI_PROXY029 error message.