How To Fix MDC_GW019 - Enqueue of locking table failed

SAP Error Message - Details

• Message type: E = Error

• Message class: MDC_GW - Gateway implementation related messages

• Message number: 019

• Message text: Enqueue of locking table failed

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message MDC_GW019 - Enqueue of locking table failed ?

  The SAP error message MDC_GW019, which states "Enqueue of locking table failed," typically occurs in the context of SAP systems when there is an issue with the enqueue mechanism that manages locks on database objects. This error can arise due to various reasons, and understanding the cause is crucial for finding an appropriate solution.
  Causes:
  
  Lock Table Overflow: The enqueue table may be full, meaning that there are too many locks being held, and the system cannot accommodate new locks.
  Database Issues: Problems with the underlying database, such as connectivity issues or database performance problems, can lead to enqueue failures.
  Configuration Issues: Incorrect configuration settings for the enqueue server or the SAP system can lead to this error.
  High Load: A high number of concurrent users or processes trying to access the same resources can lead to contention and locking issues.
  Deadlocks: Situations where two or more processes are waiting for each other to release locks can also cause enqueue failures.
  
  Solutions:
  
  
  Check Lock Table Size: Increase the size of the lock table if it is full. This can be done by adjusting the parameters in the SAP system configuration.
  
  Use transaction RZ10 to modify the instance profile and increase the parameter enque/table_size.
  
  
  
  Monitor Locks: Use transaction SM12 to monitor and analyze existing locks. You can identify and delete unnecessary locks that may be causing the issue.
  
  
  Check System Performance: Analyze system performance using transaction ST22 (dump analysis) and SM21 (system log) to identify any underlying issues that may be affecting the enqueue service.
  
  
  Review Configuration: Ensure that the enqueue server is properly configured and that the necessary services are running. Check the settings in transaction RZ10 and RZ11.
  
  
  Database Health Check: Perform a health check on the database to ensure that it is functioning correctly. Look for any performance bottlenecks or connectivity issues.
  
  
  Reduce Concurrent Access: If possible, reduce the number of concurrent users or processes accessing the same resources to minimize contention.
  
  
  Restart Enqueue Server: In some cases, restarting the enqueue server can resolve temporary issues. This can be done through transaction SM51 or by restarting the SAP instance.
  
  
  Related Information:
  
  SAP Notes: Check SAP Notes related to the error message MDC_GW019 for any specific patches or updates that may address the issue.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they have found.
  Documentation: Review SAP documentation for best practices on managing locks and configuring the enqueue server.
  
  If the problem persists after trying the above solutions, it may be necessary to involve SAP support for further assistance.