Nexus 3.0 Technology Preview (Milestone 4 Release)

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Please download and use the latest version of Nexus Repository Manager 3.

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It’s been a little while, since we released our last milestone! We promise the wait was worth it.

In this milestone 4 release we have gone behind the scenes and changed a lot of the backend systems used to store components, metadata and configuration. We built upon years of experience and designed a system that scales well into the future and the demands to support numerous, different repository formats with a large variety of components and metadata.

And of course, we have continued with our efforts to create a slick, modern web application that meets your demands in terms of performance and usability.

Curious and can’t wait? Download a Nexus OSS bundle and do a fresh install of the release right now. And if you that want to be a little more cautious, read about what’s new and what to to be careful about.

Regardless of the path you choose, we hope you will take this opportunity to discuss your experience with this latest release. Drop us an email at or contact us via the mailing list or chat.


Have fun!

The Sonatype Nexus Team

Looking for a few good Nexans (Nexus users)

The great state of Nexus is looking for participants to help us validate the new functionality in Milestone 4. Each session will run about 45 minutes. You’ll get to try a variety of tasks using the release and tell us what works, and what doesn’t. We’ll use this feedback to eliminate any glaring holes and polish the rough edges. You get to say you had a hand in improving a product you use every day.

If interested, send us an email at We’ll schedule your session to occur within the next couple of weeks. If you choose to participate, please don’t look at the release beforehand. We want your initial reaction!

We look forward to hearing from you,

The Sonatype User Experience Team

Before you begin

Some important things to keep in mind:

  1. Upgrades between milestone builds are NOT supported. Perform a fresh install instead.

  2. Experience with installing and running Nexus 2 and repository concepts can be helpful, but is not required.

  3. Do NOT use Nexus 3 milestone builds on critical, production servers.

Where can I download Nexus 3 Milestone 4?

Nexus OSS:

Nexus Pro:

This milestone release does not include a Nexus Pro bundle, since all the changed features are available in Nexus OSS.

Is there documentation?

User documentation for Nexus 3 is nearly complete and it is getting updated regularly.

Latest HTML and PDF versions are available at:

What’s New?

This milestone represents significant changes "under the hood", mainly in the form of an updated component and metadata storage framework. Beyond that far reaching change and the affected user interface sections, we put further efforts into the user experience.


If this is your first time trying a Nexus 3 milestone release, check out our notes for previous releases. These are all available in the Nexus 3 Milestone Release area of our Knowledge Base. This will give you a good background for any of the previous changes, especially those related to the user interface as well as installation procedures.

Storage Backend

While physicists around the world are trying to create a Grand Unified Theory, we have pulled ahead and implemented a grand unified component storage system.

Figure 1. It’s hard to show a backend…​ so here’s some robutt.

This new backend is independent of the repository format and flexible enough to support any component and metadata format. For starters we have implemented support for the repository formats used by NuGet as well as Maven. And we also added a very simple raw repository format that can e.g. be used to host Maven-generated sites. The changes of the underlying semantics in turn allowed us to improve the repository management user interface as well as search.

A major benefit of the new storage backend is its flexibility. It allows search to work across all repository formats and components and include all the metadata. We have added a number of search criteria and built a custom search interface as well as pre-defined searches for specific use cases. Screenshots and more information can be found in the documentation.

Repository Administration

The updated repository administration user interface sits on top of the storage backend and allows you to manage your repositories in maven2, nuget and raw formats. All formats support proxying remote repositories, direct storage of components in Nexus hosted repositories as well as grouping repositories. The user interface clearly separates the different aspects of repository configuration and makes your repository management easy and the documentation tells you more about all the details.

nexus m4 form sections

Tab Consolidation

A new drill-down pattern in the Nexus 3 user interface allows you to focus on the current content and feature and reduces the visual complexity and number of tabs.

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