Ogg-01184 Expected 4 Bytes But Got 0 Bytes In Trail Jun 2026
Oracle GoldenGate writes transactional data into structured files known as . Each database operation captured by the Extract process is formatted into a logical record within these files.
Expected 3,number,0 bytes, but got 4,number,0 bytes, in trail 0, seqno 1,number,0, reading record trailer token at RBA {2, Oracle Help Center Extract & Pump Abends - Oracle Communities
If the source Extract process or the system hosting it crashes, restarts forcefully, or loses power while actively writing to a trail file, the file may not close properly. This results in an incomplete or truncated trail file block. 2. Network Interruptions during Transfer
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: Underlying block corruption in the ACFS, NFS, or local storage layer makes the tail end of the file unreadable. Diagnostic Steps ogg-01184 expected 4 bytes but got 0 bytes in trail
Find the last good checkpoint position of your target process.
To understand exactly what is happening in your trail files without making blind changes, use the GoldenGate utility. It allows you to peer inside the binary trail files and examine transaction tokens. Open Logdump from the OGG home directory: cd /path/to/goldengate/ ./logdump Use code with caution. Open the trail file: OPEN /path/to/goldengate/dirdat/xx00000X Use code with caution.
If the error occurs on the target side, it is usually because the Data Pump successfully read the source file, but the network or target storage truncated the file when writing it to the target system. Solution 1: Force the Data Pump to Re-send the File
A: No. The process will abend every time. You must correct the file or move to the next sequence. This results in an incomplete or truncated trail file block
The trail file was closed abruptly, often due to a disk full condition, a network glitch during a remote write, or a forced process termination.
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We cannot simply restart the process. The EXT_PROD extract is smart; it checks data integrity. If we restart it, it will re-read the trail, hit the same spot, and crash again with the same error. The trail file is physically corrupt or logically incomplete.
Troubleshooting OGG-01184: Expected 4 Bytes, But Got 0 Bytes in Trail I need to provide a comprehensive guide
This means the trail file is incomplete or corrupted, preventing the process from moving forward. 2. Common Causes
The most common cause is corruption in the file you are trying to read or process. This corruption could be due to hardware failures, software bugs, or issues during the file transfer.
This is the most common culprit. GoldenGate writes to trail files in buffered blocks. Usually, the OS handles the syncing of data to disk. However, if the server experienced a sudden power loss, a kernel panic, or a hard reset exactly while the Extract was writing a record, the file system might have closed the file handle without flushing the final buffer. The file system metadata says the file is size X, but the actual data blocks on the disk only contain data up to size X minus a few bytes. When GoldenGate restarts and re-reads the file, it sees the file size, assumes the data is there, tries to read the header, and hits a void.
