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

If the corruption is severe, you may need to delete the corrupt trail file and allow the Extract/Pump to re-extract data from the transaction logs. Stop the Extract/Pump process. Move/Rename the corrupted trail file (e.g., no000007 ).

Ensure that NFS mounts or SAN connections are stable and that you do not have hidden network timeouts causing interrupted writes.

ggsci> ALTER REPLICAT rep01, EXTSEQNO 12, EXTRBA 4819000 ggsci> START REPLICAT rep01

To understand the error, you need to understand how GoldenGate writes data. GoldenGate stores captured database operations in intermediate files known as "trail files." These files are broken down into logical records, which include transaction headers, data, and record trailers. ogg-01184 expected 4 bytes but got 0 bytes in trail

When you see this error, follow these diagnostic steps before attempting any fix.

: Input checkpoint position is greater than the size of the file. OGG-01185 : Bad trailer token in trail. How to Resolve OGG-01184

ALTER REPLICAT , EXTSEQNO , EXTRBA 0 Regenerate the Trail: If the corruption is severe, you may need

indicates that the Oracle GoldenGate process (usually a Replicat or Data Pump) attempted to read a record's trailer token but encountered an unexpected end-of-file or mismatch. It specifically expected a 4-byte trailer but found 0 bytes, meaning the record is incomplete or the trail file is at that specific Relative Byte Address (RBA) Oracle Help Center Primary Causes Abrupt Shutdowns

If next returns an error or shows a partial record at the end of the file, the trail is indeed truncated. 3. Resolve the Issue Depending on the process type, use one of the following:

Here is the surgical procedure to restore order: Ensure that NFS mounts or SAN connections are

Use ALTER EXTRACT ... EXTSEQNO ... EXTRBA ... to reposition to a valid point before the corruption.

: If only the very end of the file is corrupt, you may need to reposition the reading process (Pump or Replicat) to the next valid trail sequence using ALTER , EXTSEQNO , EXTRBA 0 Regenerate Trail

The error message typically looks like this in your ggserr.log or process report file:

The OGG-01184 Expected 4 bytes, but got 0 bytes, in trail error is a fatal PROCESS ABENDING error, meaning the GoldenGate process stops abruptly upon encountering it. The error itself indicates that the process was reading a trail file (a queue of database changes) but unexpectedly reached the end of a record while trying to read 4 more bytes of data. In Oracle GoldenGate's official documentation, the error’s cause is simply stated as "The actual length of the trail record is different from the length field". In practice, this means the trail file is corrupted, and its internal data record is incomplete.