> ## Documentation Index
> Fetch the complete documentation index at: https://docs.activeviam.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Release notes

For a detailed list of all changes, see the [Changelog](changelog).\
For migration tips, see the [Migration Notes](migration_notes).\
For details about versioning, see the [Versioning Policy](https://docs.activeviam.com/atoti-eos.html)

## 6.2.0-M1

<Warning>
  This is a preproduction release, see [https://docs.activeviam.com/preproduction-releases](https://docs.activeviam.com/preproduction-releases)
</Warning>

2026-06-15

### Summary

The main changes in the 6.2 are:

* Upgrade to Java 25
* Upgrade to Spring Boot 4: this includes among others an upgrade to Spring 7 and Jackson 3
* Switch to SLF4J for logging

Many small changes are also part of the release, check the [changelog](changelog.md) for the full list.
A detailed [migration note](migration_notes.md) is provided, with an automated process through OpenRewrite recipes.

#### Java upgrade

The new baseline is Java 25, thus benefiting from all the changes and improvements in the JDK.

#### Spring upgrade

The new baseline is Spring 7 and Spring Boot 4, as Spring Boot 3 open source support is ending in June 2026.
With the Spring upgrade, Jackson is also upgraded to version 3.

#### SLF4J

[SLF4J](https://www.slf4j.org/) is the Java logging facade de facto standard.

Atoti was still using JUL (java.util.logging) for its logging,
thus requiring to use `org.slf4j:jul-to-slf4j` for projects that wanted to use a different logging framework (logback, log4j, jcl, ...).

Now this is no longer needed to get the Atoti Server logs, however third-party dependencies might still emit logs through JUL, and for those this dependency is still needed.
In the case you want your logging to be handled by JUL, you should add a runtime dependency to `org.slf4j:slf4j-jdk14`.

Check [SLF4J documentation](https://www.slf4j.org/manual.html#swapping) for redirecting to your preferred logging framework.

### Other changes

#### Supported database version changes

The baseline for the database versions supported in DirectQuery has changed.

* ClickHouse 26.03
* Databricks Runtime: 17.3
* MSSQL Server 2019