GGSCI> ALTER EXTRACT , EXTSEQNO , EXTRBA 0 Use code with caution.
Action. Contact Oracle Support. The trail file may be corrupted. Oracle Help Center OGG-01184 - Oracle GoldenGate Error Messages
If the target Replicat is failing, you must skip the corrupted file or RBA. Skipping data can cause data asymmetry between source and target, which must be remediated later using Oracle Veridata or manual scripting.
Use the command INFO [process_name], SHOWCH in to see the current read and write checkpoints. ogg-01184 expected 4 bytes but got 0 bytes in trail
This is the most frequent cause. GoldenGate rolls over to new trail files based on size limits (e.g., MEGABYTES 500 ). Sometimes, due to I/O latency, network glitches (in heterogeneous environments), or improper shutdowns, a trail file is created in the file system with a size of . When the Replicat tries to open this file, it expects a valid file header but receives nothing, triggering the error.
Since the primary Extract reads from the database transaction logs (Oracle Redo/Archive logs), you can alter the Extract to regenerate the clean trail data. :
To confirm whether the file is truly truncated at that exact RBA, use the built-in GoldenGate Logdump Reference utility : Open Logdump from your terminal: logdump Use code with caution. Open the problematic trail file: Logdump 1 > open ./dirdat/no000007 Use code with caution. Enable header formatting display: Logdump 2 > GOTO 246849346 Use code with caution. GGSCI> ALTER EXTRACT , EXTSEQNO , EXTRBA 0
If the Extract starts successfully, it will have moved past the corrupted file and resumed processing new transactions.
Resolving Oracle GoldenGate Error OGG-01184: Expected 4 Bytes But Got 0 Bytes in Trail
Navigate to the directory where the trail files reside (both Source and Target) and check the file sizes. The trail file may be corrupted
Antivirus scanners, automated backup scripts, or monitoring agents locking or interacting with the active trail files can cause filesystem-level write collisions. Step-by-Step Diagnostic & Resolution Protocol
If a Data Pump is writing to a remote target trail over a flaky network connection, or if the underlying server experiences a sudden power loss, kernel panic, or hard reboot, unbuffered writes may be lost. The operating system's file cache might write a partial block without finishing the necessary tail blocks. 3. Concurrent File Access or Antivirus Locking
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 you are using Oracle GoldenGate 12.2 or higher, you can leverage Automated Remote Trail File Recovery : Stop the Pump process on the source.
Is this error happening on a or a Target Replicat ?