5.1.0

Issues

• [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 Nov 8, 2026
  36

  

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

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  apache/pulsar#26732·Asthenia0412 opened Sep 28, 2026 · Updated Nov 2, 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 25, 2026
  1

• [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 27, 2026
  43

  

• [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 Nov 4, 2026
  5

  

• [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
  2

• [fix][admin] Return null for an unset namespace resource group and anti-affinity group

  area/adminarea/brokerdoc-not-neededready-to-testtype/bug
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  apache/pulsar#22008·nodece opened Jan 31, 2024 · Updated Oct 25, 2026
  11

  

• [improve][broker] Track in-progress request frame memory

  ready-to-testrelease/4.0.15release/4.2.6release/5.0.2
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  apache/pulsar#27110·poorbarcode opened Oct 25, 2026 · Updated Nov 2, 2026
  26

  

• [fix][client] Discard only the undecodable tail of a batch and give back the permits the broker charged for it

  doc-not-neededready-to-test
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  apache/pulsar#25386·gosonzhang opened Mar 23, 2026 · Updated Oct 27, 2026
  36

• [fix][broker] Prevent backlog quota cursor updates during topic close

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  apache/pulsar#25914·Denovo1998 opened Jun 1, 2026 · Updated Oct 26, 2026
  9

• [fix][broker] Move newPosition to nextValidLedger:-1 to avoid cursor position and ledger inconsistency in ManagedCursorImpl

  doc-not-neededready-to-test
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  apache/pulsar#25117·oneby-wang opened Dec 28, 2025 · Updated Oct 26, 2026
  27

  

• [improve][broker] Remove the inbound FlowControlHandler queue

  ready-to-testrelease/4.0.15release/4.2.6release/5.0.2
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  apache/pulsar#27126·poorbarcode opened Oct 26, 2026 · Updated Oct 28, 2026
  2

  

• [fix][broker] Revalidate ownership before loading fenced topics

  ready-to-testrelease/4.0.15release/4.2.6release/5.0.2type/bug
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  apache/pulsar#27285·codelipenghui opened Nov 1, 2026 · Updated Nov 10, 2026
  5

  

• [fix][client] Enforce scalable producer send timeouts while waiting for segments

  ready-to-testrelease/5.0.2type/bug
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  apache/pulsar#27283·codelipenghui opened Nov 1, 2026 · Updated Nov 10, 2026
  3

  

• [fix][ml] Recover cursor initialization on empty terminated ledgers

  ready-to-testrelease/4.0.15release/4.2.6release/5.0.2type/bug
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  apache/pulsar#27382·codelipenghui opened Nov 5, 2026 · Updated Nov 7, 2026
  

• [fix][client] Distinguish direct TC discovery from proxy pairing

  release/5.0.2type/bug
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  apache/pulsar#27387·codelipenghui opened Nov 5, 2026 · Updated Nov 10, 2026
  

• [fix][meta] Preserve lock state and refresh reads during reacquisition

  release/4.0.15release/4.2.6release/5.0.2type/bug
  Unread
  apache/pulsar#27384·codelipenghui opened Nov 5, 2026 · Updated Nov 9, 2026
  

• [fix][txn] Retire metadata publish generations after pre-ledger failures

  release/5.0.2type/bug
  Unread
  apache/pulsar#27388·codelipenghui opened Nov 5, 2026 · Updated Nov 10, 2026
  2

  

• [fix][client] Keep watched transaction handlers reconnectable after lookup timeout

  release/5.0.2type/bug
  Unread
  apache/pulsar#27378·codelipenghui opened Nov 5, 2026 · Updated Nov 11, 2026
  1

  

• [fix][broker] Refresh and fence scalable transaction coordinator assignments

  release/5.0.2type/bug
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  apache/pulsar#27386·codelipenghui opened Nov 5, 2026 · Updated Nov 12, 2026
  6

  

• [fix][client] Drain sealed checkpoint parents after transaction visibility

  release/5.0.2type/bug
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  apache/pulsar#27389·codelipenghui opened Nov 5, 2026 · Updated Nov 10, 2026
  

• [fix][ml] Release terminal read ownership before notifying callbacks

  release/4.0.15release/4.2.6release/5.0.2type/bug
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  apache/pulsar#27381·codelipenghui opened Nov 5, 2026 · Updated Nov 9, 2026
  

• [fix][ml] Reconcile cursor ledger publication after metadata errors

  release/4.0.15release/4.2.6release/5.0.2type/bug
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  apache/pulsar#27385·codelipenghui opened Nov 5, 2026 · Updated Nov 9, 2026
  

• [improve][broker] Optimize topic-level Prometheus metrics export by reusing labels and avoiding boxing

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  apache/pulsar#27418·void-ptr974 opened Nov 6, 2026 · Updated Nov 8, 2026