Use the PURGEOLDEXTRACTS parameter in the Manager configuration to automatically delete old trail files and prevent disk space exhaustion.
: When a trailing reader process (like a Pump or Replicat) or even a self-checking Extract parses a record, it uses the Relative Byte Address (RBA) to locate the next pointer. The error states that at the specified RBA, the process expected a 4-byte structure to close out a data block cleanly.
# 1. Stop Replicat stop replicat <rep_name>
If the physical file size is smaller than or exactly equal to the RBA reported by the error, the trail file has been prematurely truncated. Step 3: Check for Zombie Processes on Target ogg-01184 expected 4 bytes but got 0 bytes in trail
Check the actual size of the trail file on your operating system file system: ls -l ./dirdat/et000015 Use code with caution.
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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 This public link is valid for 7 days
Run OPEN and then GOTO .
The most common real-world culprit is a full disk or an enforced disk quota limit on the dirdat filesystem. If the source Extract is actively writing a transaction block and the storage volume hits 100% capacity, the write stream is severed mid-transit. The transaction record header is saved, but the trailing 4-byte verification token is never written to disk. 2. Network Interruptions and Hard Crashes
Oracle GoldenGate relies on binary log files known as to capture, move, and replicate database transactions across environments. How Trail Files Form Records The transaction record header is saved
If the source trail file is perfectly healthy, you can force the Data Pump to overwrite the corrupted target trail file. :
Before applying a fix, inspect your environment using these steps to confirm the scope of the problem. 1. View the Detailed Process Error Log
If the corrupted file is in the middle of a sequence or contains critical data that cannot be skipped, you must regenerate it from the source system.