Class file version 61.0 is JDK 17. 55.0 is JDK 11. So it sounds like something was compiled to run on JDK 17, but is trying to run on JDK 11.
I'm guessing that it's the newer Jenkins update that requires JDK 17. -- Josh Tynjala Bowler Hat LLC https://bowlerhat.dev/ On Tue, Mar 10, 2026 at 12:30 PM Harbs <[email protected]> wrote: > Our build has been stalled for two days. I contacted infra and they got it > unstuck. I believe they’ve updated Jenkins. > > Our build is currently failing with: > > F:\jenkins\jenkins-home\agent.jar > f:\jenkins\jenkins-home\712657a4\maven35-interceptor.jar > f:\jenkins\jenkins-home\712657a4\maven3-interceptor-commons.jar 60055 > Exception in thread "main" java.lang.UnsupportedClassVersionError: > hudson/remoting/Launcher has been compiled by a more recent version of the > Java Runtime (class file version 61.0), this version of the Java Runtime > only recognizes class file versions up to 55.0 > > I don’t know very much about Maven, but does this have to do with the fact > that the pom is declaring the Java version as 11? > > Harbs
