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

When you encounter this error, your Extract or Replicat process will abend. But what does it actually mean? At its core, this error indicates in your GoldenGate trail file. GoldenGate is attempting to read a specific data sequence, but the trail file has unexpectedly truncated or ended prematurely.

The error is a critical Oracle GoldenGate replicat failure that halts data synchronization. It occurs when a reading process encounters an unexpected end-of-file (EOF) or corrupted marker within a trail file.

The error ogg-01184 expected 4 bytes but got 0 bytes occurs when GoldenGate’s reader reaches a point in the trail file where it expects to read the header, but the file ends abruptly. The system reads 0 bytes instead of 4.

: If the trail is severely corrupted, you may need to perform an ETROLLOVER

Troubleshooting OGG-01184: Expected 4 Bytes But Got 0 Bytes in Trail ogg-01184 expected 4 bytes but got 0 bytes in trail

If a simple ETROLLOVER doesn't work, you may need to skip the specific RBA where the corruption occurred. This requires using the logdump utility, a powerful GoldenGate tool for viewing and analyzing trail files.

Current LogTrail: /u01/gg/dirdat/rt000012 Reading RBA 4820192 ... EOF LogTrail unexpectedly reached end of file.

Option A: Reposition the Extract Process (If reading from Source)

Add a validation and recovery feature that detects OGG error cases like "expected 4 bytes but got 0 bytes in trail" and handles them gracefully: validate packet-trail lengths on read, log structured diagnostics, optionally attempt soft-repair, and surface a clear, actionable error to callers. When you encounter this error, your Extract or

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FILEVIEW shows the raw trail file content in hex and ASCII. If at a certain position you see 0000 0000 where a non-zero length is expected, the file is corrupted.

Reposition the process: ALTER , RBA .

Alter your downstream process to stop exactly at that valid position, or modify the checkpoints using the ggsci command line to step forward past the corrupt metadata mark. GoldenGate is attempting to read a specific data

In some cases, using different GoldenGate versions for the Extract and the Pump/Replicat can lead to parsing errors if the trail formats are slightly incompatible. Recommended Recovery Steps Verify File Integrity:

ogg-01184 expected 4 bytes but got 0 bytes in trail

Error eliminated completely. Recoverability improved.

Check the record details. If the utility returns an unexpected EOF or indicates that the record blocks are incomplete, the file is corrupted at this boundary. Step 3: Implement the Fix

Before altering pointers, use the GoldenGate Logdump utility to inspect the state of the trail file at the failing offset. Open Logdump from the GoldenGate home directory: ./logdump Use code with caution.