The most common cause is corruption in the file you are trying to read or process. This corruption could be due to hardware failures, software bugs, or issues during the file transfer.
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On the system, look at the Pump Extract context. You will need to reposition the Pump Extract to regenerate that specific trail sequence.
If the trail file is fundamentally readable except for the final incomplete transaction block, you can force the reading process to consider the current truncated point as its hard endpoint.
The Oracle GoldenGate error indicates that a process (usually a Pump or Replicat) expected to find a 4-byte record trailer but instead encountered an empty file or an unexpected End-of-File (EOF). This is typically a sign of trail file corruption ogg-01184 expected 4 bytes but got 0 bytes in trail
to point to the beginning of the corrupted trail sequence number or a specific good RBA: GGSCI> alter ext_pump, extseqno 124, extrba 0 Use code with caution.
GGSCI> FILEVIEW /ggs/dirdat/mt000001
; it should automatically fetch the missing data from the source trail files. Oracle Help Center Option 3: Manual Trail Regeneration (ETROLLOVER)
In remote trail scenarios, network interruptions can lead to mismatched record lengths between the source and target files. The most common cause is corruption in the
The error message typically presents in the GoldenGate error log ( ggserr.log ) as follows:
Expected 3,number,0 bytes, but got 4,number,0 bytes, in trail 0, seqno 1,number,0, reading record trailer token at RBA {2, Oracle Help Center Extract & Pump Abends — oracle-mosc
Implement TCPBUFSIZE and TCPFLUSHBYTES parameters inside the Data Pump configurations.
For experienced administrators, logdump can sometimes repair minor header corruption. You will need to reposition the Pump Extract
: If the file system hosting the ./dirdat directory runs out of storage space or hits a strict user quota mid-transaction, GoldenGate cannot commit the final trail bytes, causing a hard truncation.
: GoldenGate writes data sequentially into trail files located in the dirdat directory. Each transaction record wrapped into the file contains a precise structure: a header, a data payload, and a closing token (the trailer).
Delete the corrupted trail file and any subsequent files in the sequence on the target.
Below is an extensive guide explaining why this happens, how to isolate the root cause, and how to recover your replication pipelines safely. Technical Root Causes of OGG-01184