Please feel free to adjust the priority, however http://www.apache.org/legal/release-policy.html#licensing says that license clearance is a must, thus I report this as a Blocker.
Every ASF release MUST comply with ASF licensing policy. This requirement is of utmost importance
I downloaded apache-maven-3.6.2-bin.zip, and I see the following issues with it (note: there might be more):
- JCL 1.2 implemented over SLF4J (http://www.slf4j.org) org.slf4j:jcl-over-slf4j:jar:1.7.25
License: MIT License (MIT) http://www.opensource.org/licenses/mit-license.php (lib/jcl-over-slf4j.license)
The license for the artifact is most likely Apache 2.0 rather than MIT: https://github.com/qos-ch/slf4j/tree/master/jcl-over-slf4j
- SLF4J API Module (http://www.slf4j.org) org.slf4j:slf4j-api:jar:1.7.25
License: MIT License (MIT) http://www.opensource.org/licenses/mit-license.php (lib/slf4j-api.license)
Maven does not comply with SLF4j license.
Here's license for SLF4j: https://www.slf4j.org/license.html
It requires to include slf4j copyright notice, however, Maven fails to do that
http://www.opensource.org/licenses/mit-license.php must not be used as it almost never points to a true license. It is extremely unlucky that someone would copyright their work as "Copyright (c) <year> <copyright holders>"
- org.eclipse.sisu.inject (http://www.eclipse.org/sisu/org.eclipse.sisu.inject/) org.eclipse.sisu:org.eclipse.sisu.inject:eclipse-plugin:0.3.3
License: Eclipse Public License, Version 1.0 (EPL-1.0) http://www.eclipse.org/legal/epl-v10.html (lib/org.eclipse.sisu.inject.license)
The link to eclipse.org/sisu responds with 404.
sisu might have their own copyright notices that should be retained, however Maven re-distributes none of them (org.eclipse.sisu.inject.site-0.3.3.zip has notice.html file which is not present in Maven re-distribution)
lib/org.eclipse.sisu.inject-0.3.3.jar bundles ASM. ASM is MIT licensed, thus every re-distribution MUST retain ASM copyright notice.
Maven re-distributes ASM and fails to comply with ASM license.
lib/wagon-http-3.3.3-shaded.jar bundles jsoup (https://jsoup.org/license) which is MIT-licensed. Maven fails to comply with jsoup license.