How To Fix GT327 - Operation terminated due to DDL lock

SAP Error Message - Details

• Message type: E = Error

• Message class: GT - Database utilities

• Message number: 327

• Message text: Operation terminated due to DDL lock

What causes this issue?

An entry that represents a lock for DDL statements was found in table
D0GEN. This lock is normally set by program tp.

System Response

The requested operation is terminated because the operation also
results in DDL statements.

How to fix this error?

Please read Note 102069 or the section about "tp impsync" in the
documentation of program tp.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message GT327 - Operation terminated due to DDL lock ?

  The SAP error message GT327, which states "Operation terminated due to DDL lock," typically occurs when a Data Definition Language (DDL) operation is trying to access a database object that is currently locked by another transaction. This can happen in various scenarios, such as when multiple users or processes are trying to modify the same database object simultaneously.
  Causes:
  
  Concurrent DDL Operations: Two or more transactions are trying to perform DDL operations (like creating, altering, or dropping tables) on the same database object at the same time.
  Long-Running Transactions: A transaction that holds a lock on a database object is taking too long to complete, preventing other transactions from accessing that object.
  Uncommitted Transactions: If a transaction is not committed or rolled back, it can hold locks on database objects, leading to DDL lock issues for other operations.
  Database Configuration: Certain database configurations or settings may lead to more frequent locking issues.
  
  Solutions:
  
  
  Identify the Locking Transaction:
  
  Use transaction codes like SM12 (to view locks) or SM21 (to check system logs) to identify which transaction is holding the lock.
  You can also use database-specific tools or queries to find out which session is holding the lock.
  
  
  
  Wait for the Lock to Release:
  
  If the locking transaction is a long-running process, you may need to wait for it to complete. Monitor the transaction and check if it finishes.
  
  
  
  Terminate the Locking Transaction:
  
  If the locking transaction is stuck or not responding, you may need to terminate it. This can be done using transaction SM12 to delete the lock entry or using database management tools to kill the session.
  
  
  
  Optimize DDL Operations:
  
  Schedule DDL operations during off-peak hours to minimize the chances of concurrent access.
  Ensure that DDL operations are as quick as possible to reduce the time locks are held.
  
  
  
  Review Application Logic:
  
  Check the application logic to ensure that transactions are being committed or rolled back promptly to avoid holding locks longer than necessary.
  
  
  
  Database Configuration:
  
  Review and adjust database settings related to locking and transaction management if necessary.
  
  
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any specific guidance or patches related to this error. SAP frequently updates its knowledge base with solutions for common issues.
  Database Documentation: Refer to the documentation for your specific database (e.g., Oracle, SQL Server, HANA) for more details on how DDL locks are managed and how to troubleshoot them.
  Performance Monitoring: Implement monitoring tools to keep an eye on database performance and locking issues to proactively address potential problems.
  
  By following these steps, you should be able to resolve the GT327 error and prevent it from occurring in the future.