[logback-user] Release of logback versions 1.3.6 and 1.4.6

Ceki Gulcu ceki at qos.ch
Wed Mar 15 15:33:53 CET 2023

Hello all,

I am happy to announce the simultaneous release of logback versions
1.3.6 and 1.4.6. Both versions require slf4j-api version 2.0.x or

These releases fix several outstanding bugs. For more details, please
refer to the the news page:


We thank LVM Insurances (https://www.lvm.de) for kindly championing
these releases.

Why two simultaneous releases?

Given that downstream users are likely to depend on either Java EE (in
the javax namespace) or on Jakarta EE (in the jakarta namespace) in
their projects, it was deemed important for logback to support both EE

As such, logback 1.3.x supports Java EE whereas logback 1.4.x supports
Jakarta EE, otherwise the two versions are feature identical.

Both 1.3.x and 1.4.x series require the fluent-API introduced in SLF4J

The 1.3.x series requires Java 8 at runtime. If you wish to build
logback from source, you will need Java 9.

The 1.4.x series requires Java 11 at build time and at runtime.

Groovy configuration:

Support for Groovy configuration was dropped for security reasons but
was recovered by Tucker Pelletier (virtualdogbert). See:



For benchmarking figures please see:


Reproducible builds:

Recent logback releases are reproducible. This means that anyone
checking out the code corresponding to the release version from github
and building that local copy, will get obtain an identical binary to
the binary found on Maven central. Note that due to issue MJAR-275
with the module-info.java produced in earlier java versions,
reproducible builds require Java 19.

Donations and sponsorship

You can also support SLF4J/logback/reload4j projects via donations and
sponsorship. We thank our current supporters and sponsors for their
continued contributions and in particular Spotify R&D and Exoscale.

Sponsorship link: https://github.com/sponsors/qos-ch

Announcement mailing list:

You can receive SLF4J/logback/reload4j related announcements by
subscribing QOS.ch announce list, please visit the following URL.



Ceki Gülcü

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