How To Fix RSRV420 - The Delete Cache Elements process is already running

SAP Error Message - Details

• Message type: E = Error

• Message class: RSRV -

• Message number: 420

• Message text: The Delete Cache Elements process is already running

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message RSRV420 - The Delete Cache Elements process is already running ?

  The SAP error message RSRV420, which states "The Delete Cache Elements process is already running," typically occurs in the context of SAP BW (Business Warehouse) when there is an attempt to delete cache elements while another process is already executing that same operation. This can happen during data loading, reporting, or when manually trying to clear the cache.
  Cause:
  
  Concurrent Processes: The most common cause is that another user or process is already executing the cache deletion. SAP BW does not allow multiple instances of the same cache deletion process to run simultaneously to prevent data inconsistencies.
  Long-Running Processes: If a previous cache deletion process is taking longer than expected, it may block subsequent attempts to delete the cache.
  System Locking: Sometimes, system locks can prevent the cache deletion process from being executed.
  
  Solution:
  
  Wait for Completion: The simplest solution is to wait for the currently running process to complete. You can monitor the process in transaction codes like SM37 (Job Monitoring) to see if the job is still running.
  Check for Locks: Use transaction SM12 to check for any locks that might be preventing the cache deletion. If you find any locks that are no longer needed, you can delete them (ensure you have the necessary authorizations and that it is safe to do so).
  Terminate the Process: If you determine that the process is stuck or taking too long, you may need to terminate it. You can do this in SM37 by selecting the job and choosing to cancel it. Be cautious with this approach, as it may lead to data inconsistencies if not handled properly.
  System Restart: In extreme cases, if the issue persists and you cannot identify the cause, a system restart may be necessary. However, this should be done with caution and typically as a last resort.
  Check for Updates: Ensure that your SAP system is up to date with the latest patches and updates, as there may be bug fixes related to cache management in newer versions.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as RSRV (for managing the BW system), SM37 (for job monitoring), and SM12 (for lock entries).
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  Performance Monitoring: Regularly monitor system performance and job execution times to identify any recurring issues with cache management.
  
  If the problem persists after trying the above solutions, it may be beneficial to consult with your SAP Basis team or reach out to SAP support for further assistance.