How To Fix DB6PM199 - Action '&1' already locked by user '&2'

SAP Error Message - Details

• Message type: E = Error

• Message class: DB6PM - DB2 UDB for UNIX, Windows: Performance Monitoring

• Message number: 199

• Message text: Action '&1' already locked by user '&2'

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message DB6PM199 - Action '&1' already locked by user '&2' ?

  The SAP error message DB6PM199 indicates that a specific action (denoted by &1) is already locked by another user (denoted by &2). This typically occurs in the context of database management or operations where concurrent access to certain resources is restricted to prevent conflicts or data integrity issues.
  Cause:
  
  
  Concurrent Access: The most common cause of this error is that two users or processes are trying to perform the same action on the same database object simultaneously. This could be due to:
  
  A long-running transaction that has not yet been completed.
  Another user actively working on the same object.
  A system process that has locked the resource.
  
  
  
  Locking Mechanism: SAP uses a locking mechanism to ensure that data integrity is maintained. When one user locks a resource, other users are prevented from accessing it until the lock is released.
  
  
  Solution:
  
  
  Wait and Retry: If the action is not urgent, you can wait for the other user to complete their task and then retry the action.
  
  
  Identify the Lock: Use transaction codes like SM12 (for lock entries) to identify which user is holding the lock. You can check the lock entries and see if the lock can be released.
  
  
  Release the Lock: If you have the necessary authorizations and it is appropriate to do so, you can manually release the lock from SM12. However, be cautious with this approach, as it may lead to data inconsistencies if the other user is still working on the data.
  
  
  Communicate with the User: If you identify the user holding the lock, you may want to communicate with them to understand their actions and coordinate accordingly.
  
  
  Review Locking Strategy: If this issue occurs frequently, it may be worth reviewing the locking strategy and transaction design to minimize conflicts. This could involve optimizing long-running transactions or implementing better user coordination.
  
  
  Related Information:
  
  
  Transaction Codes:
  
  SM12: Display and manage lock entries.
  SM21: Check system logs for any related issues.
  ST22: Analyze dumps that may provide insights into system behavior.
  
  
  
  SAP Notes: Check SAP Notes for any known issues or patches related to locking mechanisms or specific transactions that may be causing frequent locks.
  
  
  Documentation: Review SAP documentation on database locking and transaction management for best practices.
  
  
  By following these steps, you should be able to address the DB6PM199 error effectively.