How To Fix UJR_EXCEPTION011 - Error obtaining concurrency lock (&1)

SAP Error Message - Details

• Message type: E = Error

• Message class: UJR_EXCEPTION - Message Class for Write-Back

• Message number: 011

• Message text: Error obtaining concurrency lock (&1)

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message UJR_EXCEPTION011 - Error obtaining concurrency lock (&1) ?

  The SAP error message UJR_EXCEPTION011 indicates that there is an issue with obtaining a concurrency lock in the context of the SAP system. This error typically arises in scenarios where multiple processes or users are trying to access or modify the same resource simultaneously, leading to a conflict.
  Cause:
  
  Concurrency Issues: The most common cause is that another transaction or user is currently holding a lock on the resource you are trying to access. This can happen in various scenarios, such as when multiple users are trying to update the same data or when a long-running transaction is holding a lock.
  Lock Table Overflow: If the lock table is full, new requests for locks may be denied, leading to this error.
  System Performance Issues: High system load or performance issues can also lead to delays in obtaining locks, resulting in this error.
  Configuration Issues: Incorrect configuration of the locking mechanism or related parameters in the SAP system can also lead to this error.
  
  Solution:
  
  Check Lock Entries: Use transaction code SM12 to check for existing lock entries. You can identify if another user or process is holding the lock and take appropriate action, such as waiting for the lock to be released or contacting the user holding the lock.
  Increase Lock Table Size: If the lock table is full, consider increasing its size. This can be done by adjusting the parameters in the instance profile (e.g., enque/table_size).
  Optimize Transactions: Review the transactions that are causing the locks. If possible, optimize them to reduce the time they hold locks or to avoid locking conflicts.
  Monitor System Performance: Use transaction codes like ST22 (dump analysis) and SM21 (system log) to check for any performance issues or errors that might be affecting the system's ability to manage locks.
  Review Configuration: Ensure that the locking mechanism is properly configured in your SAP system. Consult with your SAP Basis team if necessary.
  Retry Mechanism: Implement a retry mechanism in your application logic to handle transient locking issues gracefully.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide additional troubleshooting steps.
  Documentation: Review SAP documentation related to concurrency control and locking mechanisms to better understand how locks are managed in your environment.
  Support: If the issue persists, consider reaching out to SAP support for further assistance, providing them with detailed logs and context around the error.
  
  By following these steps, you should be able to diagnose and resolve the UJR_EXCEPTION011 error effectively.