coderzc commented on code in PR #19138:
URL: https://github.com/apache/pulsar/pull/19138#discussion_r1069231457
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pulsar-broker/src/main/java/org/apache/pulsar/broker/delayed/bucket/BucketDelayedDeliveryTracker.java:
##########
@@ -243,6 +263,53 @@ public synchronized boolean addMessage(long ledgerId, long
entryId, long deliver
return true;
}
+ private synchronized CompletableFuture<Void> asyncMergeBucketSnapshot() {
+ List<ImmutableBucket> values =
immutableBuckets.asMapOfRanges().values().stream().toList();
+ long minNumberMessages = Long.MAX_VALUE;
+ int minIndex = -1;
+ for (int i = 0; i + 1 < values.size(); i++) {
+ ImmutableBucket bucketL = values.get(i);
+ ImmutableBucket bucketR = values.get(i + 1);
+ long numberMessages = bucketL.numberBucketDelayedMessages +
bucketR.numberBucketDelayedMessages;
+ if (numberMessages < minNumberMessages) {
+ minNumberMessages = (int) numberMessages;
+ minIndex = i;
+ }
+ }
+ return asyncMergeBucketSnapshot(values.get(minIndex),
values.get(minIndex + 1));
+ }
+
+ private synchronized CompletableFuture<Void>
asyncMergeBucketSnapshot(ImmutableBucket bucketA,
+
ImmutableBucket bucketB) {
+ immutableBuckets.remove(Range.closed(bucketA.startLedgerId,
bucketA.endLedgerId));
+ immutableBuckets.remove(Range.closed(bucketB.startLedgerId,
bucketB.endLedgerId));
+
+ CompletableFuture<Long> snapshotCreateFutureA =
+
bucketA.getSnapshotCreateFuture().orElse(CompletableFuture.completedFuture(null));
+ CompletableFuture<Long> snapshotCreateFutureB =
+
bucketB.getSnapshotCreateFuture().orElse(CompletableFuture.completedFuture(null));
+
+ return CompletableFuture.allOf(snapshotCreateFutureA,
snapshotCreateFutureB).thenCompose(__ -> {
+
CompletableFuture<List<DelayedMessageIndexBucketSnapshotFormat.SnapshotSegment>>
futureA =
+ bucketA.getRemainSnapshotSegment();
+
CompletableFuture<List<DelayedMessageIndexBucketSnapshotFormat.SnapshotSegment>>
futureB =
+ bucketB.getRemainSnapshotSegment();
+ return futureA.thenCombine(futureB,
CombinedSegmentDelayedIndexQueue::wrap)
+ .thenCompose(combinedDelayedIndexQueue -> {
+ CompletableFuture<Void> removeAFuture =
bucketA.asyncDeleteBucketSnapshot();
+ CompletableFuture<Void> removeBFuture =
bucketB.asyncDeleteBucketSnapshot();
+
+ return CompletableFuture.allOf(removeAFuture,
removeBFuture).thenRun(() -> {
Review Comment:
> When is the index rebuilt?
If index is lost, the tracker will rebuild index when reread by the managed
cursor.
> Should we unload the topic to rebuild the index if this operation fails?
Yes, we can unload the topic to rebuild the index
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