There is no fundamental reason that a transaction must abort as aresultofanynondeterministicevent;whensystemsdochoose to abort transactions due to outside events, it is due to practical consideration. After all, forcing all other nodes in a system to wait for the node that experienced a nondeterministic event (such as a hardware failure) to recover could bring a system to a painfully long stand-still. If there is a replica node performing the exact same operations in parallel to a failed node, however, then other nodes that depend on communication with the afflicted node to execute a transaction need not wait for the failed node to recover back to its original state—rather they can make requests.
