JDK compatibility issues with jackson-core 2.14 and later due to Multi-Release (MR) jars

[techwhizbang]

The time that the jackson-core library switched from using its own copy of the fasterdoubleparser code to the actual library this can cause JDK incompatibilities. The problem manifests itself if you take any newer version of the jackson-core libraries 2.14 or better and you need to do any type of dependency shading. If you do - the fasterdoubleparser uses a technique of putting all the class files across different JDK's well beyond the advertised JDK8 compatibility (https://github.com/FasterXML/jackson-core?tab=readme-ov-file#jdk) via the Maven assembly plugin (https://github.com/wrandelshofer/FastDoubleParser/blob/main/fastdoubleparser/src/assembly/mrjar.xml).

When shading you end up getting all the class files for all thefasterdoubleparser supported JDK's and if you aren't using the highest JDK version possible you will run into problems like this:

java.lang.IllegalArgumentException: Unsupported class file major version 63 at shadow.org.objectweb.asm.ClassReader.(ClassReader.java:199) at shadow.org.objectweb.asm.ClassReader.(ClassReader.java:180) at shadow.org.objectweb.asm.ClassReader.(ClassReader.java:166) at shadow.org.objectweb.asm.ClassReader.(ClassReader.java:287)

For example I am using JDK17 and the Gradle Shadow plugin. The ASM library aborts when it finds a class file that isn't inline with the JDK you are running.

This is easily reproducible if you use the Gradle Shadow plugin or the Maven Shade plugin and use JDK17 and include the jackson-core 2.15.2 as a dependency for example.