Hi, We run Jenkins 1.532.1 in some environments, and have recently come across an issue with SimpleBuildStep not being found as a valid class. This generates a lovely stack trace (as below) and linked jobs then fail.
FATAL: jenkins/tasks/SimpleBuildStep java.lang.NoClassDefFoundError: jenkins/tasks/SimpleBuildStep at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:800) at jenkins.util.AntClassLoader.defineClassFromData(AntClassLoader.java:1138) at hudson.ClassicPluginStrategy$AntClassLoader2.defineClassFromData(ClassicPluginStrategy.java:695) at jenkins.util.AntClassLoader.getClassFromStream(AntClassLoader.java:1309) at jenkins.util.AntClassLoader.findClassInComponents(AntClassLoader.java:1365) at jenkins.util.AntClassLoader.findClass(AntClassLoader.java:1325) at sun.reflect.GeneratedMethodAccessor8.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:606) at jenkins.ClassLoaderReflectionToolkit.invoke(ClassLoaderReflectionToolkit.java:44) at jenkins.ClassLoaderReflectionToolkit._findClass(ClassLoaderReflectionToolkit.java:86) at hudson.ClassicPluginStrategy$DependencyClassLoader.findClass(ClassicPluginStrategy.java:572) at java.lang.ClassLoader.loadClass(ClassLoader.java:425) at java.lang.ClassLoader.loadClass(ClassLoader.java:358) at jenkins.util.AntClassLoader.findBaseClass(AntClassLoader.java:1397) at jenkins.util.AntClassLoader.loadClass(AntClassLoader.java:1074) at java.lang.ClassLoader.loadClass(ClassLoader.java:358) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:191) at hudson.plugins.git.GitChangeSet.hasHudsonTasksMailer(GitChangeSet.java:293) at hudson.plugins.git.GitChangeSet.findOrCreateUser(GitChangeSet.java:271) at hudson.plugins.git.GitChangeSet.getAuthor(GitChangeSet.java:326) at hudson.model.AbstractBuild.getCulprits(AbstractBuild.java:414) at hudson.model.AbstractBuild$AbstractBuildExecution.post(AbstractBuild.java:729) at hudson.model.Run.execute(Run.java:1709) at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:43) at hudson.model.ResourceController.execute(ResourceController.java:88) at hudson.model.Executor.run(Executor.java:231) Caused by: java.lang.ClassNotFoundException: jenkins.tasks.SimpleBuildStep at jenkins.util.AntClassLoader.findClassInComponents(AntClassLoader.java:1375) at jenkins.util.AntClassLoader.findClass(AntClassLoader.java:1325) at jenkins.util.AntClassLoader.loadClass(AntClassLoader.java:1078) at java.lang.ClassLoader.loadClass(ClassLoader.java:358) I thought an unattended-upgrade of the JVM might have caused this, but I can't see anything in the logs that would suggest that Java has been upgraded recently. This used to work absolutely fine, and now it doesn't - hence we're hesitant to upgrade right now to resolve this issue. Does anyone have any ideas? :) Let me know if you need any further details. Thanks, Andrew -- 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/54c4056d-5586-4a06-bcaa-1c52001b46fe%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
