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

This error is not a simple configuration mismatch. It typically signals a serious structural problem in the trail file—the lifeblood of your GoldenGate replication. At its core, GoldenGate expected to read a 4-byte control field (usually a record length indicator or a checksum), but instead found an End-Of-File (EOF) marker or a null value (0 bytes).

REPLICAT rep01 -- existing parameters MAP schema.table, TARGET schema.table, FILTER (@GETENV('GGHEADER','XID') != '3.27.12345'); Start the replicat with NOHANDLECOLLISIONS (if appropriate) or ALLOWNOOPUPDATES . ogg-01184 expected 4 bytes but got 0 bytes in trail

| Field | Size | Description | |-------|------|-------------| | Record Length | 4 bytes | Indicates the total size of the following data | | Record Data | Variable | Actual change data in canonical format | | Checksum (optional) | 4 bytes | Integrity check | This error is not a simple configuration mismatch

This article provides a complete, step-by-step guide to diagnosing, fixing, and preventing the OGG-01184 error. We will cover everything from basic concepts to advanced surgical recovery techniques. What is a GoldenGate Trail File? Before fixing the error, you must understand what GoldenGate is trying to read. A trail file (e.g., dirdat/rt000001 ) is a binary sequence of records. Each record represents a database operation (INSERT, UPDATE, DELETE, DDL). The structure is: REPLICAT rep01 -- existing parameters MAP schema

logdump> next logdump> next If the trail file is simply truncated, there is no next record.

cd $OGG_HOME ./logdump logdump> open /u01/gg/dirdat/rt000012 logdump> ghdr on logdump> detail on logdump> pos 4820192 logdump> n