# What's New in Apache Pulsar 4.0

DevFeed: [What's New in Apache Pulsar 4.0](<https://devfeed.tech/articles/what-s-new-in-apache-pulsar-4-0-12763.md>)

Original publisher: [Read original article](<https://pulsar.apache.org/blog/2024/10/24/announcing-apache-pulsar-4-0/>)

Author: Lari Hotari

Published: 2024-10-24T00:00:00Z

Content type: release

Language: en

Sources: [Apache Pulsar Blog](<https://devfeed.tech/sources/apache-pulsar-blog.md>)

Topics: [Apache Pulsar](<https://devfeed.tech/topics/pulsar.md>), [Transactions](<https://devfeed.tech/topics/transactions.md>), [real-time](<https://devfeed.tech/topics/real-time.md>), [Command-line interface](<https://devfeed.tech/topics/cli.md>), [REST API](<https://devfeed.tech/topics/rest-api.md>), [Prometheus](<https://devfeed.tech/topics/prometheus.md>), [User Interfaces](<https://devfeed.tech/topics/user-interfaces.md>), [Automation](<https://devfeed.tech/topics/automation.md>), [Documentation](<https://devfeed.tech/topics/documentation.md>)

Tags: [announce](<https://devfeed.tech/tags/announce.md>), [apache](<https://devfeed.tech/tags/apache.md>), [blog-post](<https://devfeed.tech/tags/blog-post.md>), [cli](<https://devfeed.tech/tags/cli.md>), [features](<https://devfeed.tech/tags/features.md>), [improvements](<https://devfeed.tech/tags/improvements.md>), [launch](<https://devfeed.tech/tags/launch.md>), [lts](<https://devfeed.tech/tags/lts.md>), [metrics](<https://devfeed.tech/tags/metrics.md>), [prometheus](<https://devfeed.tech/tags/prometheus.md>), [real-time](<https://devfeed.tech/tags/real-time.md>), [release](<https://devfeed.tech/tags/release.md>), [rest-api](<https://devfeed.tech/tags/rest-api.md>), [user-interfaces](<https://devfeed.tech/tags/user-interfaces.md>)

## 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!