One of the most common triggers for this corruption is a sudden , such as an unexpected power outage or server failure. In these scenarios, an active write operation to the trail file is interrupted, leaving it in an inconsistent, or “dirty” state.
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Script periodic logdump checks to verify header integrity. Example: ogg-01184 expected 4 bytes but got 0 bytes in trail
When the Extract process reads a trail, it acts like a strict parser. It reads the first 4 bytes to say, "Okay, the next block of data is X size." In this case, the process moved the file pointer to a specific offset, reached out to grab the 4-byte header, and grasped nothing. It hit the End of File (EOF) marker prematurely.
On the system, delete or move the corrupted trail file. One of the most common triggers for this
ERROR OGG-01184 Expected 4 bytes, but got 0 bytes, in trail ./dirdat/xx000000, seqno XX, reading record trailer token at RBA XXXXXXX.
Always use the STOP command in GGSCI rather than killing OS processes. This link or copies made by others cannot be deleted
Prevention is always better than cure. To ensure the long-term health of the GoldenGate environment, the following best practices can be implemented:
Before touching GoldenGate configs, check the system environment: