How To Fix /ACCGO/MCK_MAINT539 - Internal error from enqueue server while requesting lock for contract &1

SAP Error Message - Details

• Message type: E = Error

• Message class: /ACCGO/MCK_MAINT -

• Message number: 539

• Message text: Internal error from enqueue server while requesting lock for contract &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 /ACCGO/MCK_MAINT539 - Internal error from enqueue server while requesting lock for contract &1 ?

  The SAP error message /ACCGO/MCK_MAINT539 Internal error from enqueue server while requesting lock for contract &1 typically indicates an issue with the enqueue server, which is responsible for managing locks in the SAP system. This error can occur when there is a problem with the lock management for a specific contract, identified by the placeholder &1.
  Causes:
  
  Lock Table Overflow: The enqueue server may have reached its limit for the number of locks it can manage, leading to an inability to acquire new locks.
  Network Issues: Temporary network issues between the application server and the enqueue server can cause communication problems.
  System Configuration: Incorrect configuration of the enqueue server or the application server can lead to locking issues.
  Database Issues: Problems with the underlying database can also affect the ability to manage locks.
  Concurrency Issues: Multiple processes trying to access the same contract simultaneously may lead to contention for locks.
  
  Solutions:
  
  Check Lock Table Size: Increase the size of the lock table in the SAP system configuration if it is full. This can be done by adjusting the parameters in the instance profile.
  Restart Enqueue Server: If the enqueue server is unresponsive, restarting it may resolve the issue. This can be done through the SAP Management Console (SAP MMC).
  Check System Logs: Review the system logs (transaction SM21) and enqueue logs (transaction SM12) for any additional error messages or warnings that could provide more context.
  Monitor System Performance: Use transaction ST02 (buffer management) and ST04 (database performance) to monitor system performance and identify any bottlenecks.
  Review Configuration: Ensure that the configuration of the enqueue server and application server is correct and optimized for your environment.
  Database Maintenance: Perform regular database maintenance to ensure that the database is functioning optimally and is not causing locking issues.
  Contact SAP Support: If the issue persists, consider reaching out to SAP support for further assistance, especially if it appears to be a bug or a deeper system issue.
  
  Related Information:
  
  Transaction Codes:
  
  SM12: To view and manage locks.
  SM21: To check system logs for errors.
  ST02: To monitor buffer management.
  ST04: To analyze database performance.
  
  
  SAP Notes: Check for relevant SAP Notes that may address this specific error or provide patches and updates.
  Documentation: Review SAP documentation related to enqueue management and locking mechanisms for a deeper understanding of how locks are handled in the system.
  
  By following these steps, you should be able to diagnose and resolve the issue related to the enqueue server error.