Error
Error Code:
131
SAP S/4HANA Error 131: Transaction Lock Timeout
Description
This error indicates that a database transaction was automatically rolled back because it exceeded the allowed time to acquire a necessary lock on a resource. It typically occurs in high-concurrency environments when multiple processes attempt to access or modify the same data simultaneously, leading to contention.
Error Message
ERR_TX_ROLLBACK_LOCK_TIMEOUT
Known Causes
3 known causesHigh Concurrency
Numerous transactions simultaneously compete for the same database resources, leading to lock contention and prolonged wait times.
Long-Running Transactions
A transaction holds locks for an extended duration due to inefficient operations, complex data processing, or unoptimized queries.
Inadequate Timeout Setting
The database's configured lock wait timeout period is too short for the system's typical workload and expected transaction complexity.
Solutions
3 solutions available1. Identify and Release Blocking Transactions medium
Find and terminate the specific transaction holding the lock.
1
Log in to SAP GUI with administrator privileges.
2
Execute transaction SM12 to view lock entries.
3
Filter the lock entries by the relevant user, transaction code, or object if known. If the specific transaction causing the timeout is unknown, you might need to analyze the time of the error and look for locks that have been held for an extended period.
4
Identify the lock entry that is causing the timeout. Look for entries with a long 'Lock Mode' duration or those associated with the failing transaction.
5
Select the identified lock entry and click the 'Delete' button to release the lock. Confirm the deletion.
6
Advise the user whose lock was deleted to re-execute their transaction.
2. Adjust Lock Timeout Parameter (rz11) medium
Increase the system-wide lock timeout duration.
1
Log in to SAP GUI with administrator privileges.
2
Execute transaction RZ11 to display and maintain profile parameters.
3
Enter the parameter name `enque/request_timeout` and press Enter.
4
Observe the current value. If it's too low (e.g., 10 seconds), consider increasing it.
5
Click the 'Change Value' button.
6
Enter a new, higher value for the timeout (e.g., 30 or 60 seconds). The appropriate value depends on your system's performance and typical transaction durations. Consult with SAP Basis team for guidance.
7
Click 'Save'. This change is effective immediately for new locks but might require a system restart for all instances to fully take effect.
8
Inform users that the lock timeout has been adjusted.
3. Analyze and Optimize Long-Running Transactions advanced
Investigate the root cause of transactions that frequently cause lock timeouts.
1
Identify recurring patterns of the `ERR_TX_ROLLBACK_LOCK_TIMEOUT` error. This might involve analyzing system logs (SM21), ST05 traces, or work process traces (dev_w*).
2
Use transaction ST05 (SQL Trace) to capture database activity for the problematic transaction. Filter by the user and transaction code.
3
Analyze the captured trace to identify slow SQL statements or inefficient ABAP code that might be holding locks for extended periods.
4
If slow SQL statements are found, work with the database administration team to optimize them. This could involve creating missing indexes, rewriting queries, or analyzing the execution plan.
5
If ABAP code is inefficient, engage with the ABAP development team to refactor and optimize the code. This might involve improving data retrieval, reducing redundant operations, or implementing more efficient locking mechanisms.
6
Consider implementing finer-grained locking strategies within the application if possible, to reduce the scope and duration of locks.