The opaque transactional topology has overcome the limitation of the transactional topology, and the opaque transactional spout is fault tolerant even if the data source nodes are down. The opaque transactional spout has the following characteristics:
In the case of a transactional topology, we would maintain both the
count parameters to make the decision whether the tuple was processed earlier or not. On the other hand, in the case of an opaque transactional topology, we would need to store ...