SteveYurongSu commented on code in PR #15307:
URL: https://github.com/apache/iotdb/pull/15307#discussion_r2036423212
##########
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/subscription/broker/SubscriptionPrefetchingQueue.java:
##########
@@ -311,6 +313,29 @@ public void prefetchEvent(@NonNull final SubscriptionEvent
thisEvent) {
prefetchingQueue.add(thisEvent);
}
+ private synchronized void peekOnce() {
+ final Event peekedEvent =
UserDefinedEnrichedEvent.maybeOf(inputPendingQueue.peek());
+ if (Objects.isNull(peekedEvent)) {
+ return;
+ }
+
+ if (!(peekedEvent instanceof PipeHeartbeatEvent)) {
+ return;
+ }
+
+ final Event polledEvent = inputPendingQueue.waitedPoll();
+ if (!Objects.equals(peekedEvent, polledEvent)) {
+ LOGGER.warn(
+ "Subscription: inconsistent heartbeat event when {} peeking (broken
invariant), expected {}, actual {}, do nothing",
+ this,
+ peekedEvent,
+ polledEvent);
Review Comment:
Not enough?
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