5.1.0

Issues

• [fix][broker] Prevent incorrect isolation fallback during cluster updates

  release/4.0.15release/4.2.6release/5.0.2type/bug
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  apache/pulsar#26798·Denovo1998 opened Oct 1, 2026 · Updated Oct 23, 2026
  6

  

• [improve][pip] PIP-495: Scalable Topic Geo-Replication

  PIP
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  apache/pulsar#26692·merlimat opened Sep 22, 2026 · Updated Oct 7, 2026
  10

• [improve][ml] Optimize read entries with skipCondition

  area/MLcategory/performancedoc-not-neededready-to-testtriage/lhotari/important
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  apache/pulsar#22560·dao-jun opened Apr 23, 2024 · Updated Oct 20, 2026
  35

  

• [fix][compaction] Size rebatch buffers from uncompressed batches

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  apache/pulsar#26732·Asthenia0412 opened Sep 28, 2026 · Updated Oct 18, 2026

• [improve][broker] broker-stats for a given broker from broker-list

  release/5.0.2
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  apache/pulsar#26997·programmerahul opened Oct 19, 2026 · Updated Oct 23, 2026
  26

  

• [fix][schema] Exclude deleted schema versions from recovery results

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  apache/pulsar#27002·Denovo1998 opened Oct 19, 2026 · Updated Oct 21, 2026
  1

  

• [fix][ml] Fix cursor reset wrongly persisting pre-reset ACKs that cause messages to be silently skipped after recovery

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  apache/pulsar#26973·void-ptr974 opened Oct 18, 2026 · Updated Oct 23, 2026

• [improve][broker] Recover incompatible replication schemas on metadata changes

  ready-to-testrelease/4.0.15release/4.2.6release/5.0.2
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  apache/pulsar#27033·poorbarcode opened Oct 21, 2026 · Updated Oct 23, 2026
  41

  

• [improve][test] Add durable broker and bookie process-failure tests

  area/testready-to-test
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  apache/pulsar#27042·codelipenghui opened Oct 21, 2026 · Updated Oct 22, 2026
  

• [Enhancement] Migrate from simpleclient to Prometheus Java client 1.x (tracking)

  type/enhancement
  apache/pulsar#27045 · Filter by author lhotari opened on Oct 22, 2026 · 5.1.0

• [fix][broker] Keep the bundle affinity broker for every lookup until the bundle is owned

  doc-not-neededrelease/5.0.2Stale
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  apache/pulsar#19260·Nicklee007 opened Jan 17, 2023 · Updated Oct 23, 2026
  3

• [fix][broker] Clear pending read flags when a read fails before the cursor takes ownership

  release/4.0.15release/5.0.2
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  apache/pulsar#27059·nodece opened Oct 23, 2026 · Updated Oct 23, 2026
  14

• [fix][client] Keep non-transactional messages out of transactional batches on scalable topics

  release/5.0.2
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  apache/pulsar#27079·merlimat opened Oct 23, 2026 · Updated Oct 23, 2026

• [fix][client] Fail transaction coordinator requests after close instead of throwing NullPointerException

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  apache/pulsar#27078·merlimat opened Oct 23, 2026 · Updated Oct 23, 2026

• [fix][ml] Discard a ledger created after its creation was given up on

  doc-not-neededStale
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  apache/pulsar#16647·lordcheng10 opened Jul 18, 2022 · Updated Oct 23, 2026
  7

• [fix][broker] Retry the dedup cursor delete after a failure while disabling at topic load

  doc-label-missing
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  apache/pulsar#15363·poorbarcode opened Apr 28, 2022 · Updated Oct 23, 2026
  17

  

• [fix][broker] Start packages management before the function worker service

  area/functiondoc-not-neededStaletype/bug
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  apache/pulsar#16502·liangyuanpeng opened Jul 10, 2022 · Updated Oct 23, 2026
  7

  

• [fix][ws] Release WebSocket consumer pending slots only for pending message ids

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  apache/pulsar#27083·merlimat opened Oct 23, 2026 · Updated Oct 23, 2026

• [fix][client] Fix DLQ sending a released message when poolMessages is enabled

  doc-not-neededlifecycle/staleStale
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  apache/pulsar#13280·wangjialing218 opened Dec 14, 2021 · Updated Oct 23, 2026
  5

  

• [improve][txn] Allow transaction owners to abort their own transactions via the abortTransaction admin API

  doc-not-needed
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  apache/pulsar#22978·hrzzzz opened Jun 25, 2024 · Updated Oct 23, 2026
  1