Ogg-01184 Expected 4 Bytes But Got 0 Bytes In Trail [best] Jun 2026

Ensure FORMAT RELEASE is compatible between source and target (if using different OGG versions).

Monitor the process to ensure it passes the checkpoint smoothly.

To understand exactly what is happening in your trail files without making blind changes, use the GoldenGate utility. It allows you to peer inside the binary trail files and examine transaction tokens. Open Logdump from the OGG home directory: cd /path/to/goldengate/ ./logdump Use code with caution. Open the trail file: OPEN /path/to/goldengate/dirdat/xx00000X Use code with caution. ogg-01184 expected 4 bytes but got 0 bytes in trail

If the server or mount point hosting the trail files hits 100% capacity, the Extract process cannot finish writing its buffer, causing the file to be cut off abruptly. 🛡️ Step-by-Step Resolution Strategy

Restart the primary Extract to recreate clean trail segments. Method C: Reinitialize Target Environments (Extreme Cases) Ensure FORMAT RELEASE is compatible between source and

If the (source side) is corrupted, you may need to reposition the Extract process to a previous valid sequence number or RBA.

Working with Oracle GoldenGate (OGG) is generally a seamless experience for real-time data replication, but encountering abends is an inevitable part of database administration. One particularly frustrating issue is the error: Expected 4 bytes, but got 0 bytes, in trail [filename], seqno [X], reading record trailer token at RBA [Y] . It allows you to peer inside the binary

To understand this, it helps to visualize how a GoldenGate trail file is structured. Each trail file is a sequence of data records. Every one of these records has a fixed 4-byte header that precedes the actual data. The official Oracle documentation provides the exact cause: "The actual length of the trail record is different from the length field" . In simpler terms, when GoldenGate went to read the header of the next record to determine what kind of data was coming and how large it would be, it reached the end of the file and found nothing.

If the Extract starts successfully, it will have moved past the corrupted file and resumed processing new transactions.

This error occurs during GoldenGate replication when the trail file being read is corrupted or truncated. The process expects to read a 4‑byte record length indicator at a specific position in the trail file, but instead encounters an end‑of‑file (0 bytes).