How To Fix WZ070 - Error locking a DB table

SAP Error Message - Details

• Message type: E = Error

• Message class: WZ - Workflow: Model objects

• Message number: 070

• Message text: Error locking a DB table

Self-Explanatory Message

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• What is the cause and solution for SAP error message WZ070 - Error locking a DB table ?

  SAP Error Message:
  
  WZ070 - Error locking a DB table
  
  Cause:
  The error WZ070 typically occurs when SAP tries to lock a database table record but fails. This can happen due to several reasons:
  
  Record is already locked by another user or process. SAP uses locks to ensure data consistency during transactions, and if a record is locked by another session, your session cannot obtain the lock.
  Lock table overflow or lock table issues in the SAP system.
  Database-level locking conflicts or deadlocks.
  Long-running transactions holding locks for extended periods.
  Inconsistent or corrupted lock entries in the SAP lock table (ENQUEUE).
  Authorization issues preventing proper locking.
  
  
  Explanation:
  SAP uses enqueue (lock) mechanism to prevent simultaneous updates to the same data. When a program tries to lock a table or record, it requests a lock entry in the enqueue table. If the lock cannot be obtained (because it is already locked or due to system issues), the system throws the WZ070 error.
  
  Solution:
  
  
  Check for existing locks:
  
  Use transaction SM12 to check for existing locks on the table or record.
  Identify if any locks are held by other users or processes.
  If locks are obsolete or belong to terminated sessions, you can delete them from SM12 (with caution).
  
  
  
  Analyze long-running transactions:
  
  Identify if any background jobs or user transactions are holding locks for a long time.
  Coordinate with users or administrators to release or terminate these transactions.
  
  
  
  Check system lock table status:
  
  Use transaction SM21 (system log) and ST22 (dump analysis) to check for related errors.
  Check for enqueue server issues or lock table overflows.
  
  
  
  Restart enqueue server (if necessary):
  
  In rare cases, the enqueue server (which manages locks) may need to be restarted.
  This requires system administrator intervention and should be done during a maintenance window.
  
  
  
  Review authorization:
  
  Ensure the user has the necessary authorizations to lock the table or record.
  
  
  
  Database level checks:
  
  Check for database locks or deadlocks using database tools.
  Coordinate with DBAs if needed.
  
  
  
  
  Related Information:
  
  Transaction SM12: Display and manage lock entries.
  Transaction SM21: System log for error analysis.
  Transaction ST22: Dump analysis for runtime errors.
  Enqueue Server: SAP component responsible for lock management.
  Lock Objects: Defined in ABAP Dictionary to control locking behavior.
  SAP Notes: Search SAP Support Portal for notes related to WZ070 or enqueue errors.
  
  
  Summary:
  
  Cause: Unable to lock DB table record due to existing locks or system issues.
  Solution: Check and clear locks in SM12, analyze long transactions, verify authorizations, and if needed, restart enqueue server.
  Tools: SM12, SM21, ST22, SAP Notes.
  
  
  If you provide the exact context or transaction where this error occurs, I can help with more specific troubleshooting steps.