OGG-00719
Switched log to seqno {0,number,0} while reading rec with size {1,number,0}, has read {2,number,0} bytes.
Cause
Extract detected a log that spans more than one log file. This indicates possible log corruption.
Action
Restart Extract. If the problem persists, you might need to manually issue ALTER EXTRACT to skip this record or log; however data loss may occur. For help, contact Oracle Support.