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[Enhancement] Configurable memory limit for broker, proxy and WebSocket proxy Pulsar clients, shared across all of them

Status: Open.

#26346 In apache/pulsar;

· lhotari opened on Aug 17, 2026

[Bug] Shared MemoryLimitController silently disables the client memory limit and drops the client memory metrics

Status: Open.

#26345 In apache/pulsar;

· lhotari opened on Aug 17, 2026

[Bug] V5 producer can self-deadlock a Netty IO thread: the segment dispatch chain runs sends on the connection's event loop

Status: Open.

#26344 In apache/pulsar;

· lhotari opened on Aug 17, 2026

[Bug] Producer send admission control blocks Pulsar's own internal threads, and there is no non-blocking backpressure mode

Status: Open.

#26343 In apache/pulsar;

· lhotari opened on Aug 17, 2026

[Bug] Pulsar-perf producer OutOfDirectMemoryError with slow broker

type/bugThe PR fixed a bug or issue reported a bugThe PR fixed a bug or issue reported a bug

Status: Open.

#26340 In apache/pulsar;

· AlvaroStream opened on Aug 17, 2026

[Bug] Durable cursor reset (seek / reset-cursor) can be silently discarded while reporting success when another mark-delete is queued after it

area/broker

type/bugThe PR fixed a bug or issue reported a bugThe PR fixed a bug or issue reported a bug

Status: Open.

#26304 In apache/pulsar;

· lhotari opened on Aug 10, 2026

Upgrade Apache Thrift to 0.24.0 in Pulsar-4.0 to mitigate CVE-2026-55971, CVE-2026-48144, CVE-2026-58023, CVE-2026-58662, CVE-2026-45112, CVE-2026-43871

type/enhancementThe enhancements for the existing features or docs. e.g. reduce memory usage of the delayed messagesThe enhancements for the existing features or docs. e.g. reduce memory usage of the delayed messages

Status: Open.

#26297 In apache/pulsar;

· adarshhm6 opened on Aug 10, 2026

[Bug] Topic compaction fails permanently with IndexOutOfBoundsException when rebatching compressed batch messages

type/bugThe PR fixed a bug or issue reported a bugThe PR fixed a bug or issue reported a bug

Status: Open.

#26290 In apache/pulsar;

· hozumi opened on Aug 8, 2026

[Bug] Shared subscription throughput can remain 30–40% lower after frequent consumer reconnects

Status: Open.

#26288 In apache/pulsar;

· void-ptr974 opened on Aug 7, 2026

PIP-478: SAN-only hostname verification does not hold on a Conscrypt-pinned deployment while SecurityUtility is loaded

type/enhancementThe enhancements for the existing features or docs. e.g. reduce memory usage of the delayed messagesThe enhancements for the existing features or docs. e.g. reduce memory usage of the delayed messages

Status: Open.

#26278 In apache/pulsar;

· lhotari opened on Aug 5, 2026

[Question][scalable-topics] How should controller subscribe be routed through a proxy?

Status: Open.

#26275 In apache/pulsar;

· FlorentinDUBOIS opened on Aug 4, 2026

[Question][scalable-topics] What is the full parent-before-child delivery barrier?

Status: Open.

#26274 In apache/pulsar;

· FlorentinDUBOIS opened on Aug 4, 2026