How To Fix BGRFC402 - Enqueue error (when scheduler debugging requested)

SAP Error Message - Details

• Message type: E = Error

• Message class: BGRFC - qRFC - New Background RFC

• Message number: 402

• Message text: Enqueue error (when scheduler debugging requested)

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message BGRFC402 - Enqueue error (when scheduler debugging requested) ?

  The SAP error message BGRFC402 indicates an enqueue error that occurs when the background RFC (bRFC) scheduler is unable to acquire a lock on a resource it needs to process a request. This can happen for various reasons, such as contention for the lock, issues with the enqueue server, or problems with the configuration of the bRFC.
  Causes of BGRFC402 Enqueue Error
  
  Lock Contention: Another process may already hold the lock that the bRFC scheduler is trying to acquire.
  Enqueue Server Issues: The enqueue server may be down or not functioning correctly, leading to issues in acquiring locks.
  Configuration Issues: Incorrect configuration of the bRFC or enqueue settings in the SAP system.
  Long-running Transactions: If a transaction is taking too long to complete, it may hold onto the lock longer than expected.
  System Performance Issues: High load on the system can lead to delays in processing and acquiring locks.
  
  Solutions to BGRFC402 Enqueue Error
  
  
  Check Lock Entries: Use transaction code SM12 to check for existing lock entries. If you find locks that are no longer needed, you can delete them (ensure that they are not being used by other processes).
  
  
  Monitor Enqueue Server: Check the status of the enqueue server using transaction SM66 or SM50. Ensure that it is running and not overloaded.
  
  
  Review bRFC Configuration: Verify the configuration settings for bRFC in transaction SM58 and ensure that they are set up correctly.
  
  
  Analyze Long-running Transactions: Use transaction SM37 to check for long-running jobs that may be holding locks. If necessary, terminate or optimize these jobs.
  
  
  System Performance Tuning: If the system is under heavy load, consider tuning the performance by optimizing database queries, increasing hardware resources, or adjusting system parameters.
  
  
  Restart the Enqueue Server: If the enqueue server is not responding, you may need to restart it. This should be done with caution and ideally during a maintenance window.
  
  
  Check for SAP Notes: Look 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:
  
  SM12: To view and manage lock entries.
  SM58: To monitor and manage asynchronous RFC calls.
  SM37: To monitor background jobs.
  SM66: To monitor all active processes in the system.
  
  
  
  SAP Documentation: Refer to the official SAP documentation for more detailed information on bRFC and enqueue mechanisms.
  
  
  SAP Support: If the issue persists after trying the above solutions, consider reaching out to SAP Support for further assistance.
  
  
  By following these steps, you should be able to diagnose and resolve the BGRFC402 enqueue error effectively.