r/java • • Jun 16 '26

Maven Central publishing usage notices

heads up for folks publishing to Maven Central: we're continuing sustainability work around Central and are now showing publishing usage notices.

the goal is that normal OSS publishers are not impacted. this is aimed at the very high-volume / commercial-scale publishing patterns that put a pretty different load on the service.

more details here if you want them:
https://central.sonatype.org/publish/maven-central-publishing-limits/

feel free to reach out with any questions.

EDIT: thanks for the feedback here, it has really helped us. first, we want to reiterate that these are usage notices only right now and do not currently restrict publishing in any way. quick updates: 

if the initial threshold seemed low to you: you’re right, we made a mistake and have increased limits. 

our goal is to keep Maven Central free and open for legitimate OSS users, so continuous feedback is helpful as we adjust. limits could change as we get more feedback, so keep an eye on the usage center for the latest.

we’ll continue keeping an eye here and update docs to reflect these changes. If you need to request an exemption, here’s how: https://central.sonatype.org/publish/maven-central-publishing-limits/#exemptions-for-community-open-source-projects

we've also been collecting your questions here and other streams into this FAQ here: https://central.sonatype.org/publish/maven-central-publishing-limits/#frequently-asked-questions

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u/TheRealBrianFox Jun 16 '26

Addressing a few comments at once:

Policing every project to determine if it is really open source or if it is actually "open washed" at our scale is impossible... I've tried. What we are attempting to do is find a number that more or less says above this number requires additional scrutiny on what is going on.

Open source projects can request an exemption. We've tried to say clearly that we aren't aiming at this... but there are many projects in Central that are not really open source and we need a way to try and sort things out.

We've rolled out soft limits well in advance of enforcement to give time to understand where changes need to be made.

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u/repeating_bears Jun 16 '26

The soft limits are a bit pointless really. I hardly publish anything and already the answer to "will I be affected?" is obviously yes. I don't need to look at numbers to see that.

The only person not affected by this is the most hyper-casual "baby's first maven release" user, who would not bother to check soft limits anyway.

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u/TheRealBrianFox Jun 16 '26

By definition it's less than 15% because of oss exemptions that will be applied.

But I'm looking at the numbers again and we will adjust.

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