XComp commented on code in PR #27921:
URL: https://github.com/apache/flink/pull/27921#discussion_r3316524611
##########
flink-runtime/src/main/java/org/apache/flink/runtime/checkpoint/CheckpointCoordinator.java:
##########
@@ -1999,6 +2000,29 @@ public long getCheckpointTimeout() {
return checkpointTimeout;
}
+ /**
+ * Returns the remaining {@link Duration} until {@code
minPauseBetweenCheckpoints} is satisfied
+ * for a new active-trigger checkpoint, computed from the time elapsed
since the last completed
+ * checkpoint (or from the coordinator clock's epoch when no checkpoint
has completed yet —
+ * which is normally far in the past in production). {@link Duration#ZERO}
means the trigger can
+ * fire immediately.
+ *
+ * <p>Returns {@link Optional#empty()} as a fallback if a checkpoint is
already in flight
+ * (triggering or pending), in which case no active trigger should be
scheduled.
+ *
+ * <p>All checks are made under the coordinator lock.
Review Comment:
that's an implementation detail that doesn't need to be exposed via JavaDoc
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