The error message you're encountering, "ogg-01184 expected 4 bytes but got 0 bytes in trail," typically occurs in the context of Oracle database operations, particularly when dealing with Oracle Data Pump or Oracle Secure Backup (OSB) operations. However, the most common scenarios involve issues with data files, backups, or exports created with Oracle tools.
# 1. Stop Replicat
stop replicat <rep_name>
Error Example (from GoldenGate log)
2025-03-23 10:15:32 ERROR OGG-01184 trail file ./dirdat/rt000001, expected 4 bytes but got 0 bytes in trail.
1. Zero-Byte Trail Files (Empty Files)
This is the most frequent cause. GoldenGate rolls over to new trail files based on size limits (e.g., MEGABYTES 500). Sometimes, due to I/O latency, network glitches (in heterogeneous environments), or improper shutdowns, a trail file is created in the file system with a size of 0 bytes.
When the Replicat tries to open this file, it expects a valid file header but receives nothing, triggering the error. ogg-01184 expected 4 bytes but got 0 bytes in trail
5. Review Operation Logs
- Look into logs from the operation that produced the error for any earlier warnings or errors.