Check the GoldenGate Error Log (usually ggserr.log ) to find the specific sequence number and RBA where the error occurred.
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
Ensure the dirdat directory has enough space to prevent partial writes. ogg-01184 expected 4 bytes but got 0 bytes in trail
The "expected 4 bytes but got 0" condition signifies that the GoldenGate process reached a Relative Byte Address (RBA) where it expected to find metadata, but instead encountered the end of the file.
Compare the RBA mentioned in the error with the actual size of the trail file on the disk. If the RBA is larger than the file size, the file is definitely truncated. 3. Resolution Strategies Check the GoldenGate Error Log (usually ggserr
Always use the STOP command in GGSCI rather than killing OS processes.
Use ALTER REPLICAT , EXTTRAILSOURCE , RBA to move past the error. Note that this may result in data loss for that specific record. Understanding the Root Causes Ensure the dirdat directory
Host trail files on stable, high-performance filesystems to reduce the risk of I/O related corruption. OGG-01184 - Oracle GoldenGate Error Messages
If the source Extract process crashes while writing, it may leave a "short" record at the end of the trail file that lacks the necessary closing tokens.
If the corruption is at the very end of a trail file and the next trail file exists, you can skip the corrupted record: