: Set up automated alerting on filesystem directories containing your GoldenGate dirdat/ paths to avoid partial write scenarios caused by space exhaustion.
The error occurs in Oracle GoldenGate when a process (typically a Replicat or Pump) expects a 4-byte record trailer but encounters an empty or truncated trail file. This is almost always a sign of trail file corruption or a version mismatch between source and target . Root Causes
Modern versions of GoldenGate can automatically rebuild remote trail files if they are corrupted. the Pump process on the source system.
Use ALTER EXTRACT ... EXTSEQNO ... EXTRBA ... to reposition to a valid point before the corruption. ogg-01184 expected 4 bytes but got 0 bytes in trail
: Instability during the transfer of trail files from source to target can result in incomplete files at the destination.
Corruption in the trail file. This often happens if a process (like a Pump) tries to read beyond the actual end of a file, or if a network/disk failure caused an incomplete write. Troubleshooting & Resolution Steps Identify the Corruption Point
After the replicat passes that RBA, remove the filter and restart normally. : Set up automated alerting on filesystem directories
If the corruption is severe, the source Extract may need to be repositioned to recreate the trail files from a known good point in the archive logs. Contact Support:
The source Extract is generating a trail format that the target Replicat does not understand.
Action. Contact Oracle Support. The trail file may be corrupted. Oracle Help Center OGG-01184 Expected 4 bytes, but got 0 bytes - Oracle Root Causes Modern versions of GoldenGate can automatically
Create a daily logdump validator:
: Log into the OS and compare the physical size of the trail file with the RBA reported in the error. If the RBA is larger than the file size, the process is attempting to read non-existent data. Check for Concurrent Writes