How To Fix /AIF/RUNTIME021 - Wait for lock of run &1

SAP Error Message - Details

• Message type: E = Error

• Message class: /AIF/RUNTIME -

• Message number: 021

• Message text: Wait for lock of run &1

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /AIF/RUNTIME021 - Wait for lock of run &1 ?

  The SAP error message /AIF/RUNTIME021 Wait for lock of run &1 typically occurs in the context of the Application Interface Framework (AIF) when there is a contention for a lock on a specific run or process. This can happen when multiple processes or users are trying to access or modify the same resource simultaneously, leading to a situation where one process must wait for the lock to be released by another.
  Cause:
  
  Concurrent Processing: Multiple instances of the same process are trying to access the same data or resource at the same time.
  Long-Running Transactions: A transaction that takes a long time to complete can hold a lock for an extended period, causing other processes to wait.
  Deadlocks: In some cases, a deadlock situation may arise where two or more processes are waiting for each other to release locks.
  
  Solution:
  
  Wait for Completion: If the process is expected to complete soon, you may simply need to wait for the lock to be released.
  Check Running Processes: Use transaction codes like SM50 or SM66 to monitor active processes and identify any long-running jobs that may be holding locks.
  Optimize Long-Running Jobs: If a particular job is taking too long, consider optimizing it to reduce the time it holds the lock.
  Increase Lock Timeout: If applicable, you may consider increasing the lock timeout settings, but this should be done with caution as it may lead to other issues.
  Review Code: If the issue is recurring, review the code or configuration of the AIF processes to ensure that they are not unnecessarily locking resources.
  Consult SAP Notes: Check for any relevant SAP Notes or updates that may address known issues related to this error.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with transaction codes like SM12 (to view and manage locks), SM21 (to check system logs), and ST22 (to check dumps).
  SAP Documentation: Refer to the official SAP documentation for AIF for best practices and guidelines on managing locks and optimizing performance.
  Performance Monitoring: Regularly monitor system performance and lock situations to proactively address potential issues before they impact users.
  
  If the problem persists after trying the above solutions, it may be beneficial to engage with your SAP Basis team or SAP support for further investigation and assistance.