"Unsupported major.minor version 52.0" means that you need to run on Java 8 (see https://stackoverflow.com/questions/10382929/how-to-fix-java-lang-unsupportedclassversionerror-unsupported-major-minor-versi/)
the Java 6 version you are using is EOL since 2013 (see https://en.wikipedia.org/wiki/Java_version_history) and your Jenkins version was released in 2015 (see https://www.jenkins.io/changelog-stable/#v1.609.3) so I don't that this version can run on Java 6. I dunno why you are trying to use something old and with tons of issues resolved in the latest version on an outdated and without support Java version, but sounds like a no-good idea. El lunes, 12 de julio de 2021 a las 16:33:20 UTC+2, bob...@gmail.com escribió: > Let me add that the system property java.class.version on both servers > new (source and copy) has the value 50.0 > > So it seems I need to get rid of all 52.0 stuff. > > > > On Monday, July 12, 2021 at 4:30:53 PM UTC+3 GI D wrote: > >> On a copied installation of Jenkins 1.609 to a new server, I notice that >> when I select a build and click "configure", I get a greyed-out config page >> with "LOADING" as a watermark that never goes away. At the same time I see >> in catalina.out lots of errors such as this: >> >> Jul 12, 2021 4:15:20 PM hudson.ExpressionFactory2$JexlExpression evaluate >> WARNING: Caught exception evaluating: d.helpFile in >> /jenkins/job/platform%20set%20branch%20name/configure. Reason: jav >> a.lang.reflect.InvocationTargetException >> .... >> .... >> Caused by: java.lang.UnsupportedClassVersionError: >> org/jenkinsci/plugins/scriptsecurity/sandbox/RejectedAccessException : >> Unsupported major.minor version 52.0 >> >> I think the reason is that, for a few days, I was running the new Jenkins >> with a slightly newer Java version (1.6.0_41 rather than 1.6.0_30). Now I >> have made sure I run it with _30. During this short period this particular >> build has been executed a few times. However I do get the same problem on >> other builds that have not executed on this new server. >> >> Almost all errors (or warnings if you will) are about the script-security >> plugin. >> >> Please advise. >> >> - George >> >> -- You received this message because you are subscribed to the Google Groups "Jenkins Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to jenkinsci-users+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/jenkinsci-users/5ad0b2e8-e7d9-4a09-8475-8de696b315fcn%40googlegroups.com.
