How To Fix D3055 - No lock held by this thread

SAP Error Message - Details

• Message type: E = Error

• Message class: D3 - CCMS - DB2 on OS390

• Message number: 055

• Message text: No lock held by this thread

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 D3055 - No lock held by this thread ?

  The SAP error message D3055, "No lock held by this thread," typically occurs in the context of database operations or when dealing with object locks in SAP systems. This error indicates that a thread is attempting to release a lock that it does not currently hold, which can happen for several reasons.
  Causes:
  
  Lock Management Issues: The thread may have attempted to release a lock that was never acquired, possibly due to a programming error or a logic flaw in the application.
  Concurrency Problems: If multiple threads or processes are trying to access the same resource, it may lead to situations where a thread expects to hold a lock but does not.
  Transaction Rollback: If a transaction is rolled back, any locks held by that transaction are released, and subsequent attempts to release those locks may trigger this error.
  Timeouts: If a lock acquisition times out, the thread may not hold the lock anymore, leading to this error when trying to release it.
  
  Solutions:
  
  Review Code Logic: Check the application code to ensure that locks are being acquired and released correctly. Ensure that every lock acquisition has a corresponding release.
  Error Handling: Implement proper error handling to manage situations where locks cannot be acquired or released. This can help prevent the application from trying to release a lock that it does not hold.
  Debugging: Use debugging tools to trace the execution of the code and identify where the lock management is failing. Look for patterns in the code that may lead to this issue.
  Lock Monitoring: Monitor the locks in the system to identify any contention or deadlock situations that may be causing this error. SAP provides transaction codes like SM12 (for lock entries) and SM21 (for system logs) that can help in monitoring.
  Consult Documentation: Refer to SAP documentation or notes related to locking mechanisms and error D3055 for any specific recommendations or patches that may address the issue.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error. SAP frequently updates its knowledge base with solutions for common problems.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they have found.
  System Logs: Review system logs for additional context around the error, which may provide insights into what was happening in the system at the time the error occurred.
  
  By following these steps, you should be able to diagnose and resolve the D3055 error in your SAP environment.