OGG-00988
WARNING: Unsupported operation. This might cause transactional inconsistency. Modifying input checkpoint #{3,number,0}, Oracle thread #{4,number,0} of {2}: ioseq = {0,number,0} iorba = {1,number,0}
Cause
An ALTER EXTRACT command was issued to alter the read position of an Extract thread that reads one of the logs in a RAC configuration.
Action
None. This is a warning but assumes the action is intentional. For help, contact Oracle Support.