Broker

• [fix][broker] Allow intermittent error from topic policies service when loading topics (#24829)
• [fix][broker] AvgShedder comparison error (#24954)
• [fix][broker] Avoid recursive update in ConcurrentHashMap during policy cache cleanup (#24939)
• [fix][broker] BacklogMessageAge is not reset when cursor mdPosition is on an open ledger (#24915)
• [fix][broker] Ensure LoadSheddingTask is scheduled after metadata service is available again (#24838)
• [fix][broker] ExtensibleLoadManager: handle SessionReestablished and Reconnected events to re-register broker metadata (#24932)
• [fix][broker] Fix bug in PersistentMessageExpiryMonitor which blocked further expirations (#24941)
• [fix][broker] fix getMaxReadPosition in TransactionBufferDisable should return latest (#24898)
• [fix][broker] Fix incorrect topic loading latency metric and timeout might not be respected (#24785)
• [fix][broker] Fix stack overflow caused by race condition when closing a connection (#24934)
• [fix][broker] Fix totalAvailablePermits not reduced when removing consumer from non-persistent dispatcher (#24885)
• [fix][broker] Fix wrong behaviour when using namespace.allowed_clusters, such as namespace deletion and namespace policies updating (#24860)
• [fix][broker] Flaky-test: ExtensibleLoadManagerImplTest.testDisableBroker (#24770)
• [fix][broker] Flaky-test: TopicTransactionBufferTest.testMessagePublishInOrder (#24826)
• [fix][broker] Run ResourceGroup tasks only when tenants/namespaces registered (#24859)
• [fix][broker] Stop to retry to read entries if the replicator has terminated (#24880)
• [fix][broker] Trigger topic creation event only once for non-existent topic (#24802)
• [fix][broker] Use poll instead remove to avoid NoSuchElementException (#24933)
• [fix][broker]Leaving orphan schemas and topic-level policies after partitioned topic is deleted by GC (#24971)
• [fix][broker]Transactional messages can never be sent successfully if concurrently taking transaction buffer snapshot (#24945)
• [fix][admin] Set local policies overwrites "number of bundles" passed during namespace creation (#24762)
• [fix][ml] Fix getNumberOfEntries may point to deleted ledger (#24852)
• [fix][ml] Fix ledger trimming race causing cursor to point to deleted ledgers (#24855)
• [fix][ml] PIP-430: Fix concurrency issue in MessageMetadata caching and improve caching (#24836)
• [fix]Fixed getChildren('/') on Oxia based provider (#24863)
• [improve][broker] Add tests for using absolute FQDN for advertisedAddress and remove extra dot from brokerId (#24787)
• [improve][broker] Cache last publish timestamp for idle topics to reduce storage reads (#24825)
• [improve][broker] Don't log an error when updatePartitionedTopic is called on a non-partitioned topic (#24943)
• [improve][broker] Optimize lookup result warn log (#24942)
• [improve][broker] Part-1 of PIP-434: Expose Netty channel configuration WRITE_BUFFER_WATER_MARK to pulsar conf and pause receive requests when channel is unwritable (#24423)
• [improve][broker] Part-2 of PIP-434: Use ServerCnxThrottleTracker, instead of modifying channel.readable directly (#24799)
• [improve][broker] PIP-434: add configurations to broker.conf (#24800)
• [improve][broker] Reduce the broker close time to avoid useless wait for event loop shutdown (#24895)
• [improve][broker] Replace isServiceUnitActiveAsync with checkTopicNsOwnership (#24780)
• [improve][broker]Call scheduleAtFixedRateNonConcurrently for scheduled tasks, instead of scheduleAtFixedRate (#24596)
• [improve][broker]Improve NamespaceService log that is printed when cluster was removed (#24801)
• [improve][broker]Skip to mark delete if the target position of expira… (#24881)
• [fix][txn] fix concurrent error cause txn stuck in TransactionBufferHandlerImpl#endTxn (#23551)
• [cleanup][broker] Remove unused configuration maxMessageSizeCheckIntervalInSeconds (#24958)
• [feat][monitor] Add ML write latency histogram and entry size histogram as OTel metrics (#24815)
• [feat][monitor] Add publish latency histogram as OTel metrics (#24810)
• [feat] PIP-442: Add memory limits for CommandGetTopicsOfNamespace (#24833)

Client

• [fix][client] Add description method to ClientBuilder (#24728)
• [fix][client] Fix deduplication for getPartitionedTopicMetadata to include method parameters (#24965)
• [fix][client] Fix getPendingQueueSize for PartitionedTopicProducerStatsRecorderImpl: avoid NPE and implement aggregation (#24830)
• [fix][client] Fix PulsarAdmin description check and add test (#24734)
• [fix][client] Fix thread leak in reloadLookUp method which is used by ServiceUrlProvider (#24794)
• [fix][client] Make auto partitions update work for old brokers without PIP-344 (#24822)
• [improve][client] Allow adding custom description to User-Agent header (#24729)
• [improve][client] Deduplicate getTopicsUnderNamespace in BinaryProtoLookupService (#24962)
• [improve][client] PIP-420: Update the schema ID format (#24798)
• [improve][client]Add null check for Pulsar client clock configuration (#24848)
• [feat][client] Implement PIP-234 for sharing thread pools and DNS resolver/cache across multiple Pulsar Client instances (#24790)
• [feat][client] PIP-234: Support shared resources in PulsarAdmin to reduce thread usage (#24893)
• [improve][client/broker] Add DnsResolverGroup to share DNS cache across multiple PulsarClient instances (#24784)
• [fix] Fix mixed lookup/partition metadata requests causing reliability issues and incorrect responses (#24832)

Pulsar IO and Pulsar Functions

• [improve][fn] Use PulsarByteBufAllocator.DEFAULT instead of ByteBufAllocator.DEFAULT (#24952)

Tests & CI

• [fix][build] Fix maven deploy with maven-source-plugin 3.3.1 (#24811)
• [fix][build] Remove invalid profile in settings.xml that caused gpg signing to fail (#24812)
• [fix][test] Add Delta Tolerance in Double-Precision Assertions to Fix Rounding Flakiness (#24972)
• [fix][test] BacklogQuotaManagerTest.backlogsAgeMetricsNoPreciseWithoutBacklogQuota handle empty /metrics scrape (#24887)
• [fix][test] Fix flaky KeySharedSubscriptionBrokerCacheTest.testReplayQueueReadsGettingCached (#24955)
• [fix][test] Fix flaky LookupPropertiesTest.testConcurrentLookupProperties (#24854)
• [fix][test] Fix flaky NonPersistentTopicTest.testProducerRateLimit (#24951)
• [fix][test] Fix flaky ReplicatorTest.testResumptionAfterBacklogRelaxed (#24904)
• [fix][test] Fix flaky SingleThreadNonConcurrentFixedRateSchedulerTest.testPeriodicTaskCancellation (#24823)
• [fix][test] Fix flaky SubscriptionSeekTest.testSeekWillNotEncounteredFencedError by counting subscription is fenced only after seek (#24865)
• [fix][test] Fix invalid test NonPersistentTopicTest.testProducerRateLimit (#24957)
• [fix][test] Fixed nondeterministic JSON ordering in multiple tests (#24821)
• [fix][test] Fixed Nondeterministic Ordering in SchemaInfoTest (#24969)
• [fix][test] Fixed ResponseBody Check in Test Helper (#24872)
• [fix][test] Made ProtobufNativeSchemaTest.testSchema order-independent (#24805)
• [fix][test] Made ProtobufSchemaTest.testParsingInfoProperty order-independent (#24807)
• [fix][test] Stabilize PublishRateLimiterOverconsumingTest by aligning measurement and using adjacent 2-sec averages (#24864)
• [fix][test] Stabilize SequenceIdWithErrorTest by fencing after first publish to avoid empty-ledger deletion and send timeout (#24861)
• [fix][test] Stabilize testMsgDropStat by reliably triggering non-persistent publisher drop (#24929)
• [fix][test]fix flaky SimpleProducerConsumerTest.testReceiveAsyncCompletedWhenClosing (#24858)
• [improve][ci] Move replication tests to new group Broker Group 5 in Pulsar CI (#24917)
• [improve][test] Disable flaky PatternConsumerBackPressureTest until the problem is fixed (#24948)

For the complete list, check the full changelog.