configuration-as-code-plugin: Accessing CASC static methods on Jenkins LTS 2.303.1 with JDK11 fails

Your checklist for this issue

• Jenkins version: 2.303.1
• Plugin version: 1.52
• OS: Docker (on UNIX)

Description

Hello, Thanks to the new Jenkins LTS bumped to JDK11, we can’t use current classes in our scripts.

When we try to access static method, it fails as such:

import io.jenkins.plugins.casc.RootElementConfigurator
def test = RootElementConfigurator.all()

Results in:

java.lang.IncompatibleClassChangeError: Method 'java.util.List io.jenkins.plugins.casc.RootElementConfigurator.all()' must be InterfaceMethodref constant
	at io.jenkins.plugins.casc.RootElementConfigurator$all.call(Unknown Source)
	at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:48)
	at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:113)
	at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:117)
	at Script1.run(Script1.groovy:3)
	at groovy.lang.GroovyShell.evaluate(GroovyShell.java:585)
	at groovy.lang.GroovyShell.evaluate(GroovyShell.java:623)
	at groovy.lang.GroovyShell.evaluate(GroovyShell.java:594)
	at hudson.util.RemotingDiagnostics$Script.call(RemotingDiagnostics.java:146)
	at hudson.util.RemotingDiagnostics$Script.call(RemotingDiagnostics.java:116)
	at hudson.remoting.LocalChannel.call(LocalChannel.java:46)
	at hudson.util.RemotingDiagnostics.executeGroovy(RemotingDiagnostics.java:113)
	at jenkins.model.Jenkins._doScript(Jenkins.java:4638)
	at jenkins.model.Jenkins.doScript(Jenkins.java:4609)
	at java.base/java.lang.invoke.MethodHandle.invokeWithArguments(MethodHandle.java:710)
	at org.kohsuke.stapler.Function$MethodFunction.invoke(Function.java:393)
	at org.kohsuke.stapler.Function$InstanceFunction.invoke(Function.java:405)
	at org.kohsuke.stapler.Function.bindAndInvoke(Function.java:208)
	at org.kohsuke.stapler.Function.bindAndInvokeAndServeResponse(Function.java:141)
	at org.kohsuke.stapler.MetaClass$11.doDispatch(MetaClass.java:536)
	at org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:58)
	at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:766)
	at org.kohsuke.stapler.Stapler.invoke(Stapler.java:898)
	at org.kohsuke.stapler.Stapler.invoke(Stapler.java:694)
	at org.kohsuke.stapler.Stapler.service(Stapler.java:240)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
	at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:799)
	at org.eclipse.jetty.servlet.ServletHandler$ChainEnd.doFilter(ServletHandler.java:1626)
	at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:157)
	at org.jenkinsci.plugins.ssegateway.Endpoint$SSEListenChannelFilter.doFilter(Endpoint.java:248)
	at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:154)
	at jenkins.security.ResourceDomainFilter.doFilter(ResourceDomainFilter.java:81)
	at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:154)
	at hudson.plugins.audit_trail.AuditTrailFilter.doFilter(AuditTrailFilter.java:112)
	at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:154)
	at jenkins.telemetry.impl.UserLanguages$AcceptLanguageFilter.doFilter(UserLanguages.java:129)
	at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:154)
	at io.jenkins.blueocean.auth.jwt.impl.JwtAuthenticationFilter.doFilter(JwtAuthenticationFilter.java:60)
	at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:154)
	at com.cloudbees.jenkins.support.slowrequest.SlowRequestFilter.doFilter(SlowRequestFilter.java:37)
	at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:154)
	at com.smartcodeltd.jenkinsci.plugin.assetbundler.filters.LessCSS.doFilter(LessCSS.java:47)
	at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:154)
	at io.jenkins.blueocean.ResourceCacheControl.doFilter(ResourceCacheControl.java:134)
	at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:154)
	at jenkins.metrics.impl.MetricsFilter.doFilter(MetricsFilter.java:125)
	at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:154)
	at hudson.util.PluginServletFilter.doFilter(PluginServletFilter.java:160)
	at org.eclipse.jetty.servlet.FilterHolder.doFilter(FilterHolder.java:193)
	at org.eclipse.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1601)
	at hudson.security.csrf.CrumbFilter.doFilter(CrumbFilter.java:155)
	at org.eclipse.jetty.servlet.FilterHolder.doFilter(FilterHolder.java:193)
	at org.eclipse.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1601)
	at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:93)
	at jenkins.security.AcegiSecurityExceptionFilter.doFilter(AcegiSecurityExceptionFilter.java:52)
	at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:98)
	at hudson.security.UnwrapSecurityExceptionFilter.doFilter(UnwrapSecurityExceptionFilter.java:53)
	at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:98)
	at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:121)
	at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:115)
	at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:98)
	at org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:105)
	at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:98)
	at org.springframework.security.web.authentication.rememberme.RememberMeAuthenticationFilter.doFilter(RememberMeAuthenticationFilter.java:101)
	at org.springframework.security.web.authentication.rememberme.RememberMeAuthenticationFilter.doFilter(RememberMeAuthenticationFilter.java:92)
	at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:98)
	at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:218)
	at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:212)
	at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:98)
	at jenkins.security.BasicHeaderProcessor.doFilter(BasicHeaderProcessor.java:96)
	at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:98)
	at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:110)
	at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:80)
	at hudson.security.HttpSessionContextIntegrationFilter2.doFilter(HttpSessionContextIntegrationFilter2.java:62)
	at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:98)
	at hudson.security.ChainedServletFilter.doFilter(ChainedServletFilter.java:110)
	at hudson.security.HudsonFilter.doFilter(HudsonFilter.java:170)
	at org.eclipse.jetty.servlet.FilterHolder.doFilter(FilterHolder.java:193)
	at org.eclipse.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1601)
	at org.kohsuke.stapler.compression.CompressionFilter.doFilter(CompressionFilter.java:51)
	at org.eclipse.jetty.servlet.FilterHolder.doFilter(FilterHolder.java:193)
	at org.eclipse.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1601)
	at hudson.util.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:85)
	at org.eclipse.jetty.servlet.FilterHolder.doFilter(FilterHolder.java:193)
	at org.eclipse.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1601)
	at org.kohsuke.stapler.DiagnosticThreadNameFilter.doFilter(DiagnosticThreadNameFilter.java:30)
	at org.eclipse.jetty.servlet.FilterHolder.doFilter(FilterHolder.java:193)
	at org.eclipse.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1601)
	at jenkins.security.SuspiciousRequestFilter.doFilter(SuspiciousRequestFilter.java:36)
	at org.eclipse.jetty.servlet.FilterHolder.doFilter(FilterHolder.java:193)
	at org.eclipse.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1601)
	at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:548)
	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)
	at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:578)
	at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127)
	at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:235)
	at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1624)
	at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:233)
	at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1435)
	at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:188)
	at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:501)
	at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1594)
	at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:186)
	at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1350)
	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
	at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127)
	at org.eclipse.jetty.server.Server.handle(Server.java:516)
	at org.eclipse.jetty.server.HttpChannel.lambda$handle$1(HttpChannel.java:388)
	at org.eclipse.jetty.server.HttpChannel.dispatch(HttpChannel.java:633)
	at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:380)
	at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:277)
	at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:311)
	at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:105)
	at org.eclipse.jetty.io.ChannelEndPoint$1.run(ChannelEndPoint.java:104)
	at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.runTask(EatWhatYouKill.java:338)
	at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:315)
	at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.tryProduce(EatWhatYouKill.java:173)
	at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:131)
	at org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:383)
	at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:882)
	at org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.run(QueuedThreadPool.java:1036)
	at java.base/java.lang.Thread.run(Thread.java:829)

I have similar issues with ConfiguratorRegistry.get() and so on.

I believe it is because the plugin is built with a JDK8 flavor and that could cause issue because of JDK9+ being more strict with some validation ?

Kind regards, /lenaing