Error: F_JZ0A42: The Online Transaction Log File Has Been Reused Already

Issue

An HVR Capture job on SAP HANA fails with the following error:

F_JZ0A42: The online transaction log file has been reused already, and no matching transaction log backup file is found.

The capture job attempts to rewind and re-read changes but cannot find the required transaction log.

Environment

• HVR 6
• Source: SAP HANA
• Capture: HVR and HVA

Resolution

To resolve this issue:

1. Increase log retention or resize the online redo area in SAP HANA so enough redo data remains available for worst-case outage scenarios.
2. Retain log backups long enough for HVR to retrieve missing logs if an online redo file is missing.
3. Ask your DBA how long online redo logs are retained. Check the global.ini -> persistence/log_* parameters.
4. Verify that the archive log backup location contains all required log sequences in order.
5. If outages occur frequently, monitor capture latency and configure alerts for retention risks thresholds.

After the error occurs, recovery requires a capture rewind or a full refresh of the affected tables.

Cause

This issue occurs when HVR must rewind to the start of the last open transaction after an SAP HANA interruption. SAP Hana does not support lightweight checkpoints. If the needed log segment is gone because of a short retention window or an outage that purged older logs, we return the above error.