becketqin commented on a change in pull request #12234:
URL: https://github.com/apache/flink/pull/12234#discussion_r429987997
##########
File path:
flink-runtime/src/main/java/org/apache/flink/runtime/checkpoint/OperatorCoordinatorCheckpoints.java
##########
@@ -58,7 +58,17 @@
final Collection<CompletableFuture<CoordinatorSnapshot>>
individualSnapshots = new ArrayList<>(coordinators.size());
for (final OperatorCoordinatorCheckpointContext coordinator :
coordinators) {
-
individualSnapshots.add(triggerCoordinatorCheckpoint(coordinator,
checkpointId));
+ final CompletableFuture<CoordinatorSnapshot>
checkpointFuture = triggerCoordinatorCheckpoint(coordinator, checkpointId);
+ coordinator.onCallTriggerCheckpoint(checkpointId);
+
+ individualSnapshots.add(checkpointFuture);
+ checkpointFuture.whenComplete((ignored, failure) -> {
+ if (failure != null) {
+ coordinator.abortCurrentTriggering();
+ } else {
+
coordinator.onCheckpointStateFutureComplete(checkpointId);
Review comment:
If the `checkpointFuture` is completed by the coordinator executor
before `whenComplete` is invoked here which shuts the valve, it seems possible
that some events get into the valve after the snapshot is taken but before the
valve is shut. That may result in inconsistent state between the TM and
Coordinator.
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