## Description:
Pulsar is a highly scalable, low latency messaging platform running on
commodity hardware. It provides simple pub-sub semantics over topics,
guaranteed at-least-once delivery of messages, automatic cursor management for
subscribers, and cross-datacenter replication.
## Project Status:
- There are no issues requiring board attention at this time.
## Project Activity:
- 4.1.2 was released on November 17th 2025
- 4.0.8 was released on November 17th 2025
- 3.0.15 was released on November 17th 2025
- 4.1.1 was released on September 27th 2025
- 4.0.7 was released on September 27th 2025
- Pulsar C++ releases:
- 4.0.1 on January 28th 2026
- 4.0.0 on December 2025
- 3.8.0 on November 14th 2025
- Pulsar Go releases:
- 0.18.0 on December 14th 2025
- 0.17.0 on October 17th 2025
- Pulsar Python releases:
- 3.10.0 on February 5th 2026
- 3.9.0 on December 30th 2025
- Pulsar NodeJS releases:
- 1.16.0 on December 29th 2025
- 1.15.0 on October 24th 2025
- New Pulsar 4.0.9, 4.1.3, and 3.0.16 releases are currently
being prepared
- We continue to have a very high number of "Pulsar Improvement
Proposal" getting submitted, discussed and voted by the
community:
PIP-444: Rate Limit for Deleting Ledger to Alleviate the ZK Pressure
PIP-445: Add Builder Methods to Create Message-based TableView
PIP-446: Support Native OpenTelemetry Tracing in Pulsar Java Client
PIP-447: Customizable Prometheus Labels for Topic Metrics
PIP-448: Topic-level Delayed Message Tracker for Memory Optimization
PIP-449: Improve Metadata Sync to Have Exclusions in Syncing Config
Across Clusters in Different Environments
PIP-451: Support Label-based Topic Subscription
PIP-452: Customizable Topic Listing of Namespace with Properties
PIP-453: Improve the Metadata Store Threading Model
PIP-454: Metadata Store Migration Framework
- Pulsar has reached 712 contributors on the main Github repo
(It was 699 contributors in September 2025)
## Health report:
- There is healthy growth in the community, and several users are starting
to become contributors to the project and engage more and more with
the community.
## Membership Data:
Apache Pulsar was founded 2018-09-18 (7 years ago)
There are currently 85 committers and 47 PMC members in this project.
The Committer-to-PMC ratio is roughly 2:1.
Community changes, past quarter:
- Cong Zhao was added to the PMC on 2025-09-18
- No new committers added this quarter. Last addition was Mingze Han on
2025-07-05.
## Community Health:
- Activity on the mailing lists remains high with a mixture of new users,
contributors, and deeper, more experienced users and contributors sparking
discussion and questions and filing bugs or new features.
- [email protected]:
- 18% increase in traffic in the past quarter (13 emails compared to 11)
- [email protected]:
- 31% decrease in traffic in the past quarter (151 emails compared to 216)
## Slack activity:
- 10852 Members (10767 in September 2025)
- 162 Active monthly users (404 in September 2025)
--
Matteo Merli
<[email protected]>
