heesung-sn commented on code in PR #20951:
URL: https://github.com/apache/pulsar/pull/20951#discussion_r1287439444
##########
pulsar-broker/src/main/java/org/apache/pulsar/broker/service/BacklogQuotaManager.java:
##########
@@ -268,4 +271,29 @@ private void disconnectProducers(PersistentTopic
persistentTopic) {
});
}
+
+ private void advanceSlowestMessageDeduplicationCursor(PersistentTopic
persistentTopic,
+ BacklogQuotaType
backlogQuotaType) {
+
+ if (backlogQuotaType != destination_storage) {
+ return;
+ }
+
+ MessageDeduplication dedup = persistentTopic.getMessageDeduplication();
+ if (dedup == null) {
+ return;
+ }
+
+ ManagedLedgerImpl mLedger = (ManagedLedgerImpl)
persistentTopic.getManagedLedger();
+ ManagedCursor slowestConsumer = mLedger.getSlowestConsumer();
+ if (slowestConsumer == null) {
+ return;
+ }
+
+ if (!PersistentTopic.isDedupCursorName(slowestConsumer.getName())) {
+ return;
+ }
+
+ dedup.takeSnapshot();
Review Comment:
I think we can keep and honor this interval check. We want to trigger
snapshots when needed, but it won't make sense to take snapshots too frequently.
As I mentioned in the motivation, producers can eventually be created when
the next snapshot cycle kicks in if the time-based snapshot is enabled.
This PR is trying to particularly help the problem when the time-based
snapshot is disabled(by default), where producer creation is indefinitely
blocked. For this, this snapshot trigger can unblock producer creation.
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