# Apache Pulsar Blog Apache Pulsar Blog This is one page of public article previews, not the complete archive. Follow Next page to continue. Summaries are not the original full articles. ## Apache Pulsar 5.0.0-M1: A Preview of the Next Major Release DevFeed: [Apache Pulsar 5.0.0-M1: A Preview of the Next Major Release]() Original publisher: [Read original article]() Author: Matteo Merli, Lari Hotari Published: 2026-06-23T00:00:00Z Content type: release Language: en Sources: [Apache Pulsar Blog]() Topics: [Apache Pulsar](), [Availability](), [GitHub]() Tags: [announce](), [apache](), [features](), [github](), [next](), [production](), [release]() ### AI overview Apache Pulsar 5.0.0-M1 is an early preview of the next major release, intended for testing with real workloads and feedback before general availability. The milestone introduces Scalable Topics, which automatically adjust capacity to actual load while preserving per-key ordering, and promotes Oxia to Pulsar's recommended metadata store. ### Source excerpt The Apache Pulsar community is pleased to announce Apache Pulsar 5.0.0-M1, the first milestone on the road to Pulsar 5.0. It is a preview: an early build that puts the major new features of 5.0 in your hands so you can try them against real workloads and send feedback well ahead of the general-availability (GA) release. It is not meant for production. ## What's New in Apache Pulsar 4.1 DevFeed: [What's New in Apache Pulsar 4.1]() Original publisher: [Read original article]() Author: David Kjerrumgaard Published: 2025-09-09T00:00:00Z Content type: release Language: en Sources: [Apache Pulsar Blog]() Topics: [Apache Pulsar](), [SDKs](), [Security](), [Grafana Cloud Metrics](), [Resilience](), [WebSocket]() Tags: [announce](), [apache](), [api](), [authentication](), [bug-fixes](), [cli](), [configuration](), [encryption](), [java](), [launch](), [monitoring](), [new-features](), [observability](), [performance](), [release](), [resilience](), [schema](), [sdk](), [security](), [websocket]() ### AI overview Apache Pulsar 4.1 is a feature release with 19 approved Pulsar Improvement Proposals, bug fixes, security updates, and performance improvements. Highlights include stronger WebSocket token security, enhanced encryption handling, client configuration and resilience improvements, third-party schema registry support, Java 17 as the minimum for the Java client SDK, improved storage management, monitoring, and topic policies. ### Source excerpt The Apache Pulsar community is thrilled to announce the launch of Apache Pulsar 4.1, a significant feature release! ## What's New in Apache Pulsar 4.0 DevFeed: [What's New in Apache Pulsar 4.0]() Original publisher: [Read original article]() Author: Lari Hotari Published: 2024-10-24T00:00:00Z Content type: release Language: en Sources: [Apache Pulsar Blog]() Topics: [Apache Pulsar](), [Transactions](), [real-time](), [Command-line interface](), [REST API](), [Prometheus](), [User Interfaces](), [Automation](), [Documentation]() Tags: [announce](), [apache](), [blog-post](), [cli](), [features](), [improvements](), [launch](), [lts](), [metrics](), [prometheus](), [real-time](), [release](), [rest-api](), [user-interfaces]() ### AI overview Apache Pulsar 4.0 is announced as a new long-term support release. The article highlights improvements to Key_Shared subscriptions, including better message ordering and reduced blocking during consumer changes and application restarts. It also describes troubleshooting metrics and planned REST API, web interface, CLI, Prometheus, and OTel integrations. ### Source excerpt The Apache Pulsar community is thrilled to announce the launch of Apache Pulsar 4.0, a new LTS release! ## What's New in Apache Pulsar 3.2.0 DevFeed: [What's New in Apache Pulsar 3.2.0]() Original publisher: [Read original article]() Author: Julien Jakubowski Published: 2024-02-12T00:00:00Z Content type: release Language: en Sources: [Apache Pulsar Blog]() Topics: [Apache Pulsar](), [Messaging](), [Multitenancy](), [WebSocket](), [Security](), [Encryption](), [Refactoring]() Tags: [apache](), [collaboration](), [contributors](), [features](), [messaging](), [multi-tenancy](), [refactoring](), [release](), [security](), [websocket]() ### AI overview Apache Pulsar 3.2 is a feature release with more than 180 improvements, optimizations, and fixes across the broker, Pulsar IO, Pulsar Functions, and CLI. It adds rate-limiting refactoring for capacity management and QoS, changes topic compaction to delete null-key messages by default, introduces WebSocket API updates, improves security for connector secrets, and enhances the CLI user experience. ### Source excerpt The Apache Pulsar community is thrilled to announce the launch of Apache Pulsar 3.2, a new feature release! This achievement is the result of a significant community collaboration, involving 57 contributors who made over 88 commits to add new features and fix bugs. Our heartfelt thanks go out to every contributor for their invaluable work! ## Apache Pulsar 2023 Year in Review DevFeed: [Apache Pulsar 2023 Year in Review]() Original publisher: [Read original article]() Author: Apache Pulsar Community Published: 2024-01-12T00:00:00Z Content type: article Language: en Sources: [Apache Pulsar Blog]() Topics: [Apache Pulsar](), [releases](), [Open Source]() Tags: [apache](), [community](), [contributors](), [growth](), [lts](), [release](), [releases](), [upgrades]() ### AI overview Apache Pulsar's 2023 year in review highlights strong community growth, increased project stability, scalability, and security, and more than 600 contributors to its main GitHub repository. It also presents Apache Pulsar 3.0 as the project's first Long-Term Support release and explains the new release model for balancing stability with access to new features. ### Source excerpt 2023 was an incredible year for Apache Pulsar as it witnessed strong community growth, with the project becoming more stable, scalable, and secure. The Apache Pulsar community embraced a significant milestone in 2023 as the project crossed 600 contributors to the Pulsar main GitHub repository. We would like to thank everyone in the Pulsar community who contributed to this remarkable achievement! ## What's New in Apache Pulsar 3.1.0 DevFeed: [What's New in Apache Pulsar 3.1.0]() Original publisher: [Read original article]() Author: tison Published: 2023-10-10T00:00:00Z Content type: release Language: en Sources: [Apache Pulsar Blog]() Topics: [Apache Pulsar](), [Compression](), [Protocol (disambiguation)](), [configuration](), [Kafka]() Tags: [apache](), [broker](), [bug-fixes](), [clusters](), [compression](), [contributors](), [customization](), [efficiency](), [feature](), [load-balancing](), [protocol](), [release](), [retention](), [storage]() ### AI overview Apache Pulsar 3.1 is a feature release shaped by more than 80 contributors and over 360 commits. The documented changes include pluggable topic compaction, customizable topic-bundle partition assignment, and a size threshold for compressing metadata. ### Source excerpt The Apache Pulsar community announces the release of Apache Pulsar 3.1, a new feature release! This is a remarkable community effort, with over 80 contributors submitting more than 360 commits for feature enhancements and bug fixes. We would like to thank all of them for their contributions! ## Recap: Apache Pulsar Sessions in CommunityOverCode Asia 2023 DevFeed: [Recap: Apache Pulsar Sessions in CommunityOverCode Asia 2023]() Original publisher: [Read original article]() Author: tison Published: 2023-08-30T00:00:00Z Content type: article Language: en Sources: [Apache Pulsar Blog]() Topics: [Apache Pulsar](), [Kafka](), [Cloud](), [Containers](), [Optimization](), [huawei]() Tags: [apache](), [aws](), [cloud-native](), [clusters](), [conference](), [huawei](), [io](), [kafka](), [load-balancer](), [load-balancing](), [lts](), [message-queue](), [new-features](), [optimization](), [production](), [recap]() ### AI overview A recap of Apache Pulsar sessions at CommunityOverCode Asia 2023, covering the Pulsar 3.0 first LTS release, new load-balancing and delayed-message features, Direct IO optimization, container-focused cloud-native improvements, and traffic-limiting practices involving Pulsar and Kafka. ### Source excerpt The CommunityOverCode Asia 2023 conference (previously known as ApacheCon Asia) has been held from August 18th to August 20th. ## Pulsar Summit North America 2023: CFP Is Open Now! DevFeed: [Pulsar Summit North America 2023: CFP Is Open Now!]() Original publisher: [Read original article]() Author: tison Published: 2023-06-28T00:00:00Z Content type: news Language: en Sources: [Apache Pulsar Blog]() Topics: [Apache Pulsar](), [Event-Streaming](), [Messaging](), [Open Source]() Tags: [apache](), [community](), [conference](), [developers](), [event](), [event-streaming](), [messaging](), [open-source](), [summit](), [training]() ### AI overview The article announces that Pulsar Summit North America 2023 will take place on October 25, 2023, and invites people to submit talks or offer sponsorship. The conference focuses on Apache Pulsar and the messaging and event-streaming community, with opportunities for knowledge sharing, training, and community participation. ### Source excerpt We're excited to announce that Pulsar Summit North America 2023 will take place on Wednesday, October 25, 2023! ## Announcing Apache Pulsar 3.0: The First Long-Term Support Release DevFeed: [Announcing Apache Pulsar 3.0: The First Long-Term Support Release]() Original publisher: [Read original article]() Author: Apache Pulsar Community Published: 2023-05-02T00:00:00Z Content type: release Language: en Sources: [Apache Pulsar Blog]() Topics: [Apache Pulsar](), [releases](), [Latency]() Tags: [apache](), [bug-fixes](), [contributors](), [latency](), [load-balancer](), [lts](), [release](), [security]() ### AI overview Apache Pulsar 3.0 is introduced as the project's first Long-Term Support release. The new release model separates LTS versions from feature releases, provides extended bug-fix and security-patch support, and includes enhancements such as a new broker load balancer designed to improve cluster utilization and reduce latency. ### Source excerpt The Apache Pulsar community today announces the release of Apache Pulsar 3.0, the first Long-Term Support (LTS) version! This is a remarkable community effort, with over 140 contributors submitting about 1500 commits for feature enhancements and bug fixes. We would like to thank all of them for their contributions! ## What's New in Apache Pulsar 2.10.4 DevFeed: [What's New in Apache Pulsar 2.10.4]() Original publisher: [Read original article]() Author: liangyepianzhou, Anonymitaet, momo-jun Published: 2023-04-19T00:00:00Z Content type: article Language: en Sources: [Apache Pulsar Blog]() Topics: [Apache Pulsar](), [releases](), [Release notes](), [Optimization](), [Concurrency]() Tags: [apache](), [broker](), [bug-fixes](), [concurrent](), [contributors](), [efficiency](), [error-handling](), [improvements](), [performance](), [releases](), [subscriptions]() ### AI overview Apache Pulsar 2.10.4 introduces improvements and bug fixes contributed through 12 commits. Highlights include better Key_Shared subscription performance, improved broker shutdown error handling, corrected cursor positioning, reduced lock contention with concurrent subscriptions, and support for deleting partitioned topics. ### Source excerpt The Apache Pulsar community releases version 2.10.4! 37 contributors provided improvements and bug fixes that delivered 12 commits. Thanks for all your contributions. ## Speakers and Agenda Announced for Pulsar Virtual Summit Europe 2023! DevFeed: [Speakers and Agenda Announced for Pulsar Virtual Summit Europe 2023!]() Original publisher: [Read original article]() Author: Sherlock Xu, Karin Landers Published: 2023-04-11T00:00:00Z Content type: news Language: en Sources: [Apache Pulsar Blog]() Topics: [Apache Pulsar](), [Streaming](), [real-time](), [observability](), [Prometheus](), [Grafana](), [OAuth 2.0](), [Access Control](), [Authentication](), [hosting](), [Shared Responsibility Model](), [Programming]() Tags: [access-control](), [apache](), [authentication](), [cloud-native](), [community](), [event](), [free](), [grafana](), [hosting](), [oauth2](), [observability](), [programming](), [prometheus](), [real-time](), [shared-responsibility](), [streaming](), [summit](), [tech]() ### AI overview Apache Pulsar announces the schedule for Pulsar Virtual Summit Europe 2023, a free online event featuring keynotes, breakout sessions, community networking, and recorded sessions. Featured talks cover Pulsar-as-a-Service hosting, shared responsibility, OAuth2 authentication, access control, observability with Prometheus and Grafana, and Pulsar clients across programming languages. ### Source excerpt We're excited to invite you to Pulsar Virtual Summit Europe 2023! Join the Apache Pulsar community online on Tuesday, May 23rd for this exciting one-day event. Don't miss 5 keynotes and 14 breakout sessions, and the opportunity to network with fellow attendees in this free online event. Not in the timezone? No problem! Register today to ensure you get the recorded sessions a week before general public release. ## Apache Pulsar Hits Its 600th Contributor DevFeed: [Apache Pulsar Hits Its 600th Contributor]() Original publisher: [Read original article]() Author: Sherlock Xu Published: 2023-02-03T00:00:00Z Content type: article Language: en Sources: [Apache Pulsar Blog]() Topics: [Apache Pulsar](), [Open Source](), [Streaming](), [Messaging](), [Scalability](), [Kafka](), [Internet of things]() Tags: [apache](), [community](), [contributors](), [growth](), [high-availability](), [iot](), [kafka](), [messaging](), [open-source](), [scalability]() ### AI overview Apache Pulsar reached its 600th contributor, reflecting strong growth in its global open-source community. The article highlights Pulsar's adoption for messaging and streaming workloads, compares its contributor activity with Kafka, and describes production use cases involving high message volumes, IoT consumers, scalability, high availability, and migration from Kafka. ### Source excerpt The Apache Pulsar community embraced a significant milestone last month as the project witnessed its 600th contributor to the Pulsar main GitHub repository. We would like to thank everyone in the Pulsar community who contributed to this remarkable achievement. ## Pulsar Virtual Summit Europe 2023: CFP Is Now Open! DevFeed: [Pulsar Virtual Summit Europe 2023: CFP Is Now Open!]() Original publisher: [Read original article]() Author: Karin Landers Published: 2023-02-02T00:00:00Z Content type: news Language: en Sources: [Apache Pulsar Blog]() Topics: [Apache Pulsar](), [Event-Streaming](), [Messaging](), [Open Source]() Tags: [announce](), [conferences](), [contributors](), [developers](), [europe](), [event](), [event-streaming](), [messaging](), [open-source](), [sponsor](), [summit](), [talk]() ### AI overview Apache Pulsar announces that Pulsar Virtual Summit Europe 2023 will take place on May 23, 2023. The announcement invites participants to submit talks or offer sponsorship, with sessions focused on Pulsar, messaging, event streaming, use cases, operations, tools, techniques, technologies, and best practices. ### Source excerpt We're excited to announce that Pulsar Virtual Summit Europe 2023 will take place on Tuesday, May 23rd, 2023! We welcome your participation to help make the event a success, by submitting a talk for the event or offering sponsorship. Learn more about Pulsar Summit and the opportunities available to speak and sponsor the summit below. ## What's New in Apache Pulsar 2.11 DevFeed: [What's New in Apache Pulsar 2.11]() Original publisher: [Read original article]() Author: Technoboy-, momo-jun Published: 2023-01-20T00:00:00Z Content type: article Language: en Sources: [Apache Pulsar Blog]() Topics: [Apache Pulsar](), [releases](), [Release notes](), [Compression](), [race-condition]() Tags: [apache](), [broker](), [community](), [compression](), [contributors](), [race-condition](), [releases]() ### AI overview Apache Pulsar 2.11 introduces feature enhancements and fixes from 61 contributors across 1,617 commits. Highlights include upgrading the server Java build version to 17, chunking with shared subscriptions, pluggable topic factories, configurable compression, metadata synchronization across clusters, and producer and consumer memory-management improvements. ### Source excerpt The Apache Pulsar community releases version 2.11! 61 contributors provided feature enhancements and fixes that delivered 1617 commits. Thanks for all your contributions. ## Apache Pulsar 2022 Year in Review DevFeed: [Apache Pulsar 2022 Year in Review]() Original publisher: [Read original article]() Author: Apache Pulsar Community Published: 2023-01-10T00:00:00Z Content type: article Language: en Sources: [Apache Pulsar Blog]() Topics: [Apache Pulsar](), [Messaging](), [Streaming](), [Open Source](), [Website]() Tags: [apache](), [community](), [ecosystem](), [events](), [global](), [growth](), [messaging](), [open-source](), [project](), [review](), [streaming](), [year-in-review]() ### AI overview Apache Pulsar's 2022 year-in-review highlights strong community growth and progress toward greater stability, scalability, and security. It covers the launch of a redesigned website, global meetups and events, two major Pulsar Summits, and contributions from the project community. ### Source excerpt 2022 was an incredible year for Apache Pulsar as it witnessed strong community growth with the project becoming more stable, scalable, and secure. ## What's New in Apache Pulsar 2.10.3 DevFeed: [What's New in Apache Pulsar 2.10.3]() Original publisher: [Read original article]() Author: liangyepianzhou, momo-jun Published: 2023-01-09T00:00:00Z Content type: release Language: en Sources: [Apache Pulsar Blog]() Topics: [Apache Pulsar](), [releases](), [Release notes](), [bug]() Tags: [apache](), [bug-fixes](), [contributors](), [improvements](), [release-notes](), [releases]() ### AI overview The Apache Pulsar community released version 2.10.3 with 155 commits from 50 contributors. The article highlights improvements to transaction-state APIs, delayed messages with transactions, configurable delayed-message lookahead, BookKeeper entry release conditions, and forced namespace deletion. ### Source excerpt The Apache Pulsar community releases version 2.10.3! 50 contributors provided improvements and bug fixes that delivered 155 commits. Thanks for all your contributions. ## Pulsar Summit Asia 2022 Recap DevFeed: [Pulsar Summit Asia 2022 Recap]() Original publisher: [Read original article]() Author: Sherlock Xu Published: 2022-12-01T00:00:00Z Content type: news Language: en Sources: [Apache Pulsar Blog]() Topics: [Apache Pulsar](), [Messaging](), [Streaming](), [event driven](), [Data Infrastructure](), [Cloud](), [Open Source]() Tags: [apache](), [e-commerce](), [event](), [event-driven](), [gaming](), [industries](), [messaging](), [open-source](), [recap](), [social-media](), [streaming](), [summit](), [virtual-event]() ### AI overview Pulsar Summit Asia 2022 was a two-day online event focused on Apache Pulsar, messaging and streaming technologies, and event-driven applications. The recap highlights more than 1,400 registrations, over 40,000 global views, 41 speakers, 36 sessions, keynotes, use cases, technical deep dives, and ecosystem discussions. ### Source excerpt Since its inception in 2020, Pulsar Summit Asia has received increasing attention from both Asia and beyond. For Pulsar Summit Asia 2022, more than 1400 people from companies like Amazon, Tencent, IBM, Huawei, Dell, ByteDance, and Splunk registered for this online event to discuss the latest messaging and streaming technologies powering a wide variety of industries like education, food, gaming, e-commerce, and social media. ## Announcing Conference Schedule for Pulsar Summit Asia 2022 DevFeed: [Announcing Conference Schedule for Pulsar Summit Asia 2022]() Original publisher: [Read original article]() Author: Sherlock Xu Published: 2022-11-04T00:00:00Z Content type: news Language: en Sources: [Apache Pulsar Blog]() Topics: [Apache Pulsar](), [Messaging](), [Streaming]() Tags: [apache](), [conference](), [event](), [messaging](), [streaming](), [technologies](), [virtual-event]() ### AI overview The article announces the schedule for Pulsar Summit Asia 2022, a two-day virtual event featuring 36 sessions on Apache Pulsar use cases, its ecosystem, operations, and technical deep dives. ### Source excerpt This August, we concluded Pulsar Summit SF, our first-ever, in-person event in North America. It witnessed over 12 breakout sessions and 5 keynotes with over 200 attendees from Apple, Blizzard, IBM, Optum, Iterable, Twitter, Uber, and many more. As we could see from the conference, there is an increase in the adoption of Pulsar and growing interest in messaging and streaming. And now, we are excited to invite you to Pulsar Summit Aisa 2022 to explore the latest messaging and streaming technologies! ## What's New in Apache Pulsar 2.7.5 DevFeed: [What's New in Apache Pulsar 2.7.5]() Original publisher: [Read original article]() Author: Jason918, momo-jun Published: 2022-09-09T00:00:00Z Content type: release Language: en Sources: [Apache Pulsar Blog]() Topics: [Apache Pulsar](), [releases](), [bug](), [Release notes](), [Deadlock]() Tags: [apache](), [api](), [bug-fixes](), [contributors](), [deadlock](), [improvements](), [releases]() ### AI overview Apache Pulsar 2.7.5 is the final 2.7.x release, featuring critical fixes for message and data loss, broker deadlocks, connection leaks, proxy failures, and compaction behavior. ### Source excerpt The Apache Pulsar community releases version 2.7.5! 23 contributors provided improvements and bug fixes that delivered 89 commits. Thanks for all your contributions. ## Pulsar Summit Asia 2022: CFP Is Open Now! DevFeed: [Pulsar Summit Asia 2022: CFP Is Open Now!]() Original publisher: [Read original article]() Author: Sherlock Xu Published: 2022-08-22T00:00:00Z Content type: news Language: en Sources: [Apache Pulsar Blog]() Topics: [Apache Pulsar](), [Event-Streaming](), [Messaging](), [Streaming]() Tags: [announcement](), [apache](), [community](), [conference](), [developers](), [event](), [event-streaming](), [messaging](), [streaming](), [summit](), [talk](), [talks](), [tutorials]() ### AI overview A call for papers is open for Pulsar Summit Asia 2022, a virtual conference focused on Apache Pulsar, messaging, and event streaming. The event seeks short session proposals covering use cases, operations, tools, techniques, the Pulsar ecosystem, technology deep dives, best practices, and case studies. ### Source excerpt Pulsar Summit is the conference dedicated to Apache Pulsar, and the messaging and event streaming community. The conference gathers an international audience of developers, data architects, data scientists, Apache Pulsar committers and contributors, as well as the messaging and streaming community. Together, they share experiences, exchange ideas and knowledge, and receive hands-on training sessions led by Pulsar experts.