Support Java SDK 8 and 21 simultaneously

[FelipeJK]

Issue Description

We have applications running on various versions of the Java SDK, including versions 8, 17, and 21.

We are experiencing a compatibility issue with the plugin sonar-findbugs-plugin.

Currently, the plugin works with either Java 8 or Java 21 (depending on the version), but not both simultaneously.

Environment

Component	Version
SonarQube	10.4
Sonar-FindBugs	4.2.0 (for Java 8) - 4.2.6 (for Java 21)
Java	8, 17, 21

[gtoison]

Java 21 did not exist when 4.2.0 was released, so it cannot analyse Java 21 bytecode and is incompatible indeed.
But what exactly is the problem when using 4.2.6 with Java 8 bytecode?

[gtoison]

Hello @FelipeJK
Any idea what is the problem with Java 8 bytecode when using the latest version?

[FelipeJK]

Sorry for the late reply. We are going to test this scenario.
We'll let you know the behavior asap.