Ogg-01184 Expected 4 Bytes But Got 0 Bytes In Trail Instant

2025-05-15 10:23:45 ERROR OGG-01184 Oracle GoldenGate Delivery for Oracle, rep1.prm: Expected 4 bytes but got 0 bytes in trail file /u01/ggate/dirdat/aa000123 (offset 0:0). Possibly the trail file is truncated, corrupted, or not properly flushed.

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 ogg-01184 expected 4 bytes but got 0 bytes in trail

An Extract process may have been killed or crashed while writing to the trail, leaving the final record header incomplete. This is almost always a sign of trail

The error is a critical Oracle GoldenGate message indicating that a process (usually a Pump or Replicat) failed to read a mandatory 4-byte record trailer token from a trail file. This typically occurs when a record is incomplete or the file has been truncated prematurely. Understanding the Root Causes This typically occurs when a record is incomplete

The error message OGG-01184: Expected 4 bytes but got 0 bytes in trail is the Oracle GoldenGate equivalent of a "sudden death" notification. It is a low-level I/O error that indicates the Extract process reached the end of a trail file expecting to find a complete record header (4 bytes) but found nothing but empty air.

: Multiple Extract processes accidentally configured to write to the same trail file, causing them to overwrite each other's data. Oracle Communities Troubleshooting Steps Verify Trail File Size