belliottsmith commented on code in PR #183:
URL: https://github.com/apache/cassandra-accord/pull/183#discussion_r2031560720
##########
accord-core/src/main/java/accord/coordinate/ExecuteSyncPoint.java:
##########
@@ -249,6 +249,6 @@ protected void start()
{
SortedArrayList<Node.Id> contact = tracker.filterAndRecordFaulty();
if (contact == null) tryFailure(new Exhausted(syncPoint.syncId,
syncPoint.route.homeKey(), null));
- else node.send(contact, to -> new WaitUntilApplied(to,
tracker.topologies(), syncPoint.syncId, syncPoint.route,
syncPoint.syncId.epoch()), executor, this);
+ else node.send(contact, to -> new WaitUntilApplied(to,
tracker.topologies(), syncPoint.syncId, syncPoint.route,
tracker.topologies().currentEpoch()), executor, this);
Review Comment:
To enforce the invariant that all transactions with lower txnid have
executed we sometimes have to visit future epochs to witness earlier txnid
executed.
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