Maven building the JAR fails: Fatal error compiling: invalid flag: --release

[bogdankatishev]

Hello,

I noticed something strange in the pom.xml file:

nexus-sso/pom.xml

Line 16 in d726b46

<maven.compiler.release>8</maven.compiler.release>

This line (release tag) introduces a feature that is only available from java 9 and +.
But this project is targeted to be build with java 8.
Hence getting the error: (when executing mvn clean package)

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.8.1:compile (default-compile) on project nexus-repository-services: Fatal error compiling: invalid flag: --release -> [Help 1]

Also tried building it with openjdk 11 but I am getting this clear error:

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.8.1:compile (default-compile) on project nexus-repository-services: Fatal error compiling: error: release version 8 not supported -> [Help 1]

Removing this line from the pom.xml file fixes the building on java 8:

nexus-sso/pom.xml

Line 16 in d726b46

<maven.compiler.release>8</maven.compiler.release>

[a-langer]

Thanks, approved.