}
// I don't think we even need to bother wasting our time sending an acknowledgement
// We would like to cancel but we can't do that on the "server" side
TransactionPrefetchAcknowledgement response = TransactionPrefetchAcknowledgement.newBuilder()
.setTransactionId(txn_id.longValue())
.setTargetPartition(request.getSourcePartition())
.build();
callback.run(response);
}