If the file is partially recoverable, use logdump to write a clean trail:
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).
ggsci> STOP EXTRACT * ggsci> STOP REPLICAT * ggsci> STOP MANAGER Abrupt termination is the #1 cause of “expected 4 bytes but got 0”. Create a daily logdump validator:
-- For Extract (writing trail) TRAILCHKSUMBLOCKCHECK YES TRAILCHKSUMCHECK YES -- For Replicat (reading trail) CHKPOINTCHKSYNC YES
This assumes you have file-level backups. If not, implement them immediately after recovery. Solution 4: Abort and Full Resync (Nuclear Option, Zero Data Loss but High Downtime) When corruption is widespread and no clean RBA exists, or if your replicat was far behind:
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