How To Fix J3021 - A system error occurred during locking

SAP Error Message - Details

• Message type: E = Error

• Message class: J3 - Dialog Messages for Data Pool Entry Transactions

• Message number: 021

• Message text: A system error occurred during locking

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.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

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.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message J3021 - A system error occurred during locking ?

  The SAP error message J3021, which states "A system error occurred during locking," typically indicates that there was an issue with the locking mechanism in the SAP system. This can happen for various reasons, and understanding the cause and potential solutions can help resolve the issue.
  Causes:
  
  Database Lock Issues: The error may occur if there are problems with the database locks, such as deadlocks or contention for resources.
  System Performance: High system load or performance issues can lead to timeouts or failures in acquiring locks.
  Configuration Issues: Incorrect configuration settings in the SAP system or database can lead to locking problems.
  Transport Issues: If the error occurs during a transport process, it may be related to issues with the transport directory or transport requests.
  User Session Issues: Sometimes, user sessions may not be properly terminated, leading to lingering locks.
  
  Solutions:
  
  Check System Logs: Review the system logs (transaction SM21) for any related error messages that can provide more context about the issue.
  Transaction SM12: Use transaction SM12 to check for and delete any orphaned locks that may be causing the issue. Be cautious when deleting locks, as this can affect other users.
  Transaction SM21: Check the system log for any additional error messages that may provide insight into the cause of the locking issue.
  Performance Monitoring: Monitor system performance using transaction ST03 or ST04 to identify any bottlenecks or performance issues that may be affecting locking.
  Database Administration: If you have access to the database, check for any locks or issues at the database level. This may require the assistance of a database administrator.
  Restart the Application Server: In some cases, restarting the application server may help clear up any temporary issues causing the locking error.
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address this specific error or provide patches or updates.
  
  Related Information:
  
  SAP Support: If the issue persists, consider reaching out to SAP Support for assistance. They can provide more detailed troubleshooting steps based on your specific system configuration.
  Documentation: Review SAP documentation related to locking mechanisms and error handling for more insights.
  Community Forums: Engage with SAP community forums or user groups where similar issues may have been discussed, and solutions shared.
  
  By following these steps, you should be able to diagnose and potentially resolve the J3021 error in your SAP system.