How To Fix QT401 - A system error has arisen in lock management

SAP Error Message - Details

• Message type: E = Error

• Message class: QT - QM: Inspection during production (with inspection points)

• Message number: 401

• Message text: A system error has arisen in lock management

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.

Unfortunately, there isn't any extra information in this error notice.

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Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

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Smart SAP Assistant

• What is the cause and solution for SAP error message QT401 - A system error has arisen in lock management ?

  The SAP error message QT401, which states "A system error has arisen in lock management," typically indicates an issue with the lock management system in SAP. This can occur due to various reasons, including database inconsistencies, issues with the application server, or problems with the lock table.
  Causes:
  
  Database Issues: Corruption or inconsistencies in the database can lead to lock management errors.
  Lock Table Overflow: If the lock table is full, it can cause issues with acquiring new locks.
  Application Server Problems: Issues with the application server or its configuration can lead to lock management errors.
  Network Issues: Network interruptions or failures can affect communication between the application server and the database.
  System Resource Limitations: Insufficient memory or CPU resources can lead to performance issues, including lock management errors.
  
  Solutions:
  
  Check System Logs: Review the system logs (transaction SM21) for any related error messages that can provide more context about the issue.
  Monitor Lock Table: Use transaction SM12 to check the lock entries. If the lock table is full, you may need to delete unnecessary locks.
  Restart Application Server: Sometimes, restarting the application server can resolve temporary issues with lock management.
  Database Consistency Check: Run database consistency checks to identify and resolve any inconsistencies.
  Increase Lock Table Size: If the lock table is frequently full, consider increasing its size in the database configuration.
  Check for Long-Running Transactions: Identify and resolve any long-running transactions that may be holding locks for an extended period.
  System Resources: Ensure that the system has adequate resources (CPU, memory) to handle the workload.
  
  Related Information:
  
  Transaction Codes:
  
  SM12: To view and manage lock entries.
  SM21: To view system logs.
  SM37: To monitor background jobs that may be causing locks.
  
  
  SAP Notes: Check SAP Notes related to QT401 for any specific patches or updates that may address the issue.
  SAP Community: Engage with the SAP Community forums for insights from other users who may have encountered similar issues.
  
  If the problem persists after trying the above solutions, it may be necessary to contact SAP support for further assistance.