Ogg-01184 Expected 4 Bytes But Got 0 Bytes In Trail ((link)) -

: Interrupted network communication during remote trail writing or incorrect mounting/dismounting of the filesystem where trails reside can leave files in a truncated state. Concurrent Access

Is this error happening on the , a Data Pump , or the Replicat process?

| Cause | Probability | Description | |-------|-------------|-------------| | | High | Extract or Pump process killed mid-write (kill -9, power failure, OOM killer) | | Filesystem full | Medium-high | Trail file write interrupted because disk filled to 100% | | Network corruption | Medium | NFS or network drive corruption during file transfer | | Manual editing/corruption | Low | Someone opened trail file in text editor or binary modification | | Version mismatch | Low | Reading trail written by newer OGG version with different record structure |

What are running on your source and target systems? ogg-01184 expected 4 bytes but got 0 bytes in trail

2026-05-31 12:00:00 ERROR OGG-01184 Expected 4 bytes, but got 0 bytes, in trail ./dirdat/et000015, seqno 15, reading record trailer token at RBA 45612398. Use code with caution.

Ensure and RETRIES are configured to handle transient network issues. Monitor disk space on trail file directories.

If the primary Extract crashed and wrote a physically corrupted trail block to the disk, you must force it to bypass the damaged file terminal by spawning a clean sequence file. : GGSCI > alter extract_name, etrollover Use code with caution. 2026-05-31 12:00:00 ERROR OGG-01184 Expected 4 bytes, but

If it is a Pump or Replicat failing on a read, position it to the next sequential trail file sequence number:

If the issue stems from an upgrade or platform migration (e.g., shifting between Big Endian and Little Endian operating systems), explicitly define the endianness or trail version format in your Extract parameter file ( .prm ). Edit the Extract parameter file: GGSCI> edit params ext_name Use code with caution.

2026-05-28T14:32:10.123-0500 ERROR OGG-01184 Oracle GoldenGate Delivery for Oracle, rep1.prm: Expected 4 bytes but got 0 bytes in trail file ./dirdat/et000000123, rba 1405234. 2026-05-28T14:32:10.125-0500 ERROR OGG-01184 Process 'REP1' abended. Use code with caution. What "4 Bytes" and "0 Bytes" Means Monitor disk space on trail file directories

Add a validation and recovery feature that detects OGG error cases like "expected 4 bytes but got 0 bytes in trail" and handles them gracefully: validate packet-trail lengths on read, log structured diagnostics, optionally attempt soft-repair, and surface a clear, actionable error to callers.

Restart the Extract Pump. It will automatically rebuild the missing target trails from the source. Oracle Help Center 3. Manual Repositioning

Action. Contact Oracle Support. The trail file may be corrupted. Oracle Help Center OGG-01184 - Oracle GoldenGate Error Messages

: Use the PURGEOLDEXTRACTS parameter in the GoldenGate Manager configuration to delete processed trails systematically, maintaining a safe storage cushion on the disk.

Restart the Pump process to overwrite/re-transmit the clean trail file to the target: GGSCI > START EXTRACT pump_prod Use code with caution.