The OGG-01184 error in Oracle GoldenGate—typically phrased as "Expected 4 bytes, but got 0 bytes in trail"—is a critical failure indicating that a process (usually a Pump or Replicat) cannot find the expected record trailer token at a specific Relative Byte Address (RBA) in the trail file. Core Cause: Trail File Corruption
If the local trail (source side) is corrupted, you may need to reposition the Extract process to a previous valid sequence number or RBA. ogg-01184 expected 4 bytes but got 0 bytes in trail
$ cd /ggs
$ ./logdump
logdump> open /ggs/dirdat/mt000001
logdump> ghostlib on
logdump> gcount on
logdump> detail on
logdump> next
Script periodic logdump checks to verify header integrity. Example: log structured diagnostics
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. optionally attempt soft-repair
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