5.0.0-M1

Issues

• [fix][broker] Fix partitioned topic auto deletion http request timeout

  doc-not-neededready-to-test
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  apache/pulsar#24912·oneby-wang opened Oct 29, 2025 · Updated Apr 27, 2026
  3

  

• [fix][broker]V1 topic creation should fail if namespace does not exist

  doc-not-neededready-to-testrelease/4.0.14release/4.1.4release/4.2.5type/bug
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  apache/pulsar#24882·poorbarcode opened Oct 22, 2025 · Updated Jul 27, 2026
  1

  

• [improve][jdbc] Add time handling support

  doc-not-neededready-to-testrelease/3.0.18release/3.3.10release/4.0.14release/4.1.4release/4.2.5
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  apache/pulsar#24773·omrifried opened Sep 22, 2025 · Updated Jul 27, 2026
  11

  

• [improve][broker] Optimize fine-grained concurrency control for BucketDelayedDeliveryTracker

  doc-not-neededrelease/4.1.4release/4.2.5
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  apache/pulsar#24739·Denovo1998 opened Sep 14, 2025 · Updated Sep 2, 2026·Draft
  30

  

• [feature][websocket] Enforce access token expiration

  doc-requiredready-to-test
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  apache/pulsar#24563·huibertalblas opened Jul 25, 2025 · Updated Apr 27, 2026
  1

  

• [fix] [broker] Fix negative subscription/consumer's unack-messages

  doc-not-neededready-to-testrelease/3.0.18release/3.3.10release/4.0.14release/4.2.5type/bug
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  apache/pulsar#24496·poorbarcode opened Jul 9, 2025 · Updated Jul 27, 2026
  

• [improve][admin] PIP-416: Add a new topic method to implement trigger offload by size threshold

  area/brokerarea/tieredstoragedoc-not-neededtype/feature
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  apache/pulsar#24420·JunFu0814 opened Jun 17, 2025 · Updated Apr 27, 2026
  15

  

• [improve][pip] PIP-423: Add a new admin API to acknowledge a single message

  doc-not-neededPIP
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  apache/pulsar#24370·Denovo1998 opened Jun 1, 2025 · Updated Apr 27, 2026
  21

  

• [fix][test] Fix flaky NegativeAcksTest.testNegativeAcksWithBackoff

  doc-not-neededrelease/3.0.18release/4.0.14release/4.2.5
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  apache/pulsar#24342·hanmz opened May 23, 2025 · Updated Jul 27, 2026
  3

• [feat][pip] PIP-419: Support consumer message filter on broker-side for specific subscription

  doc-requiredPIP
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  apache/pulsar#24305·AuroraTwinkle opened May 15, 2025 · Updated Apr 27, 2026
  16

  

• [improve][pip] PIP-418: Determine the behaviors for components that rely on BookKeeper when BookKeeper is not used

  area/brokerdocPIPtype/enhancement
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  apache/pulsar#24296·BewareMyPower opened May 13, 2025 · Updated Apr 27, 2026
  4

  

• [fix][ml] Cancel Metadata Store listeners at shutdown to fix resource leaks in some tests

  doc-not-neededready-to-testrelease/4.0.14release/4.2.5
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  apache/pulsar#24256·lhotari opened May 6, 2025 · Updated Jul 27, 2026
  13

  

• [improve][meta] Stop election operations when LeaderElectionImpl gets closed

  doc-not-neededready-to-testrelease/3.0.18release/3.3.10release/4.0.14release/4.2.5
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  apache/pulsar#23995·lhotari opened Feb 17, 2025 · Updated Jul 27, 2026·Draft
  3

  

• [improve][client] Implement HTTP client using javax.ws.rs

  doc-not-needed
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  apache/pulsar#23905·nodece opened Jan 28, 2025 · Updated Apr 27, 2026
  4

  

• [improve][broker] Add dedicated partition configuration for system topics to reduce resource usage

  doc-not-neededready-to-testrelease/3.0.18release/4.0.14release/4.2.5
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  apache/pulsar#23785·zjxxzjwang opened Dec 26, 2024 · Updated Jul 27, 2026
  22

  

• [improve] [pip] PIP-394 Add two interfaces CursorMetadataSerializerProvider and CursorMetadataDeSerializerProvider to support newer or customized cursor metadata serializations

  doc-not-neededPIPrelease/4.2.5
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  apache/pulsar#23608·poorbarcode opened Nov 18, 2024 · Updated Jul 27, 2026
  8

  

• [improve][test] Split tests module

  area/testdoc-not-needed
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  apache/pulsar#23536·heesung-sohn opened Nov 1, 2024 · Updated Apr 27, 2026
  1

  

• [fix][broker] Don't allow creating a non-persistent partitioned topic with '-partition-' in name

  doc-not-neededrelease/4.0.14release/4.1.4release/4.2.5
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  apache/pulsar#23488·hanmz opened Oct 21, 2024 · Updated Jul 27, 2026
  6

  

• [fix] [broker] Fix incorrect stat sub.msgBacklogNoDelayed if enabled delayedDeliveryFixedDelayDetectionLookahead

  doc-not-neededrelease/3.0.18release/3.3.10release/4.2.5
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  apache/pulsar#23353·poorbarcode opened Sep 26, 2024 · Updated Jul 27, 2026
  1

  

• [fix][broker] Fix NonDurable Subscription msgBackLog incorrect after topic unload

  doc-not-neededready-to-testrelease/4.0.14release/4.2.5
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  apache/pulsar#23305·summeriiii opened Sep 13, 2024 · Updated Jul 27, 2026
  7

  

• [fix][client][txn] Fix client connection closed before using

  area/brokerarea/clientarea/transactiondoc-not-neededready-to-testrelease/4.0.14release/4.2.5
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  apache/pulsar#22749·dao-jun opened May 20, 2024 · Updated Sep 11, 2026
  7

  

• [improve][function] Introduced protections against deserialization attacks

  area/functionarea/securitydoc-not-neededrelease/3.0.18release/3.2.5release/4.2.5
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  apache/pulsar#22723·aditchawdhary opened May 16, 2024 · Updated Jul 27, 2026
  5

  

• [fix] [broker] fix subscribe a non-existent cluster/namespace/topic.

  area/testdoc-not-neededready-to-testrelease/4.0.14release/4.2.5
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  apache/pulsar#22715·thetumbled opened May 15, 2024 · Updated Jul 27, 2026
  4

  

• [fix] [broker] local metadata sync topic contains configuration events causing all operations stuck

  doc-not-neededready-to-testrelease/2.11.5release/3.0.18release/3.3.10release/4.0.14release/4.2.5type/bug
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  apache/pulsar#22695·poorbarcode opened May 10, 2024 · Updated Jul 27, 2026
  5

  

• [improve][misc] PIP-351: Add options to Pulsar-Test client to support KeyStore based TLS

  doc-requiredready-to-testrelease/4.0.14release/4.2.5
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  apache/pulsar#22692·shasank112001 opened May 10, 2024 · Updated Jul 27, 2026
  13