Replication Server allows you to resynchronize and materialize the replicate database, and resume further replication without losing or risking inconsistency of data, and without forcing a quiesce of your primary database.
Database resynchronization is based on obtaining a dump of data from a trusted source and applying the dump to the target database you want to resynchronize.
To resynchronize Oracle databases, see Replication Server Heterogeneous Replication Guide > Oracle Replicate Databases Resynchronization.