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java.lang.NullPointerException at org.apache.catalina.loader.WebappClassLoader.findResources(WebappClassLoader.java:1334) at java.lang.ClassLoader.getResources(ClassLoader.java:1185) at java.lang.ClassLoader.getResources(ClassLoader.java:1181) at hudson.util.MaskingClassLoader.getResources(MaskingClassLoader.java:89) at java.lang.ClassLoader.getResources(ClassLoader.java:1181) at org.apache.tools.ant.AntClassLoader.findResources(AntClassLoader.java:957) at hudson.PluginFirstClassLoader.findResources(PluginFirstClassLoader.java:79) at org.apache.tools.ant.AntClassLoader.findResources(AntClassLoader.java:935) at hudson.PluginFirstClassLoader.findResources(PluginFirstClassLoader.java:87) at sun.reflect.GeneratedMethodAccessor24.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._findResources(ClassLoaderReflectionToolkit.java:103) at hudson.PluginManager$UberClassLoader.findResources(PluginManager.java:1171) at java.lang.ClassLoader.getResources(ClassLoader.java:1185) at java.lang.ClassLoader.getResources(ClassLoader.java:1181) at org.codehaus.groovy.transform.ASTTransformationVisitor.doAddGlobalTransforms(ASTTransformationVisitor.java:194) at org.codehaus.groovy.transform.ASTTransformationVisitor.addGlobalTransforms(ASTTransformationVisitor.java:187) at org.codehaus.groovy.transform.ASTTransformationVisitor.addPhaseOperations(ASTTransformationVisitor.java:150) at org.codehaus.groovy.control.CompilationUnit.<init>(CompilationUnit.java:186) at org.codehaus.groovy.control.CompilationUnit.<init>(CompilationUnit.java:118) at groovy.lang.GroovyClassLoader.createCompilationUnit(GroovyClassLoader.java:476) at groovy.lang.GroovyClassLoader.doParseClass(GroovyClassLoader.java:290) at groovy.lang.GroovyClassLoader.parseClass(GroovyClassLoader.java:281) at groovy.lang.GroovyShell.parseClass(GroovyShell.java:731) at groovy.lang.GroovyShell.parse(GroovyShell.java:743) at groovy.lang.GroovyShell.parse(GroovyShell.java:723) at groovy.lang.GroovyShell.evaluate(GroovyShell.java:680) at groovy.lang.GroovyShell.evaluate(GroovyShell.java:666) at hudson.plugins.groovy.SystemGroovy.perform(SystemGroovy.java:81) at hudson.tasks.BuildStepMonitor$1.perform(BuildStepMonitor.java:20) at hudson.model.AbstractBuild$AbstractBuildExecution.perform(AbstractBuild.java:785) at hudson.model.Build$BuildExecution.build(Build.java:205) at hudson.model.Build$BuildExecution.doRun(Build.java:162) at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:537) at hudson.model.Run.execute(Run.java:1741) at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:43) at hudson.model.ResourceController.execute(ResourceController.java:98) at hudson.model.Executor.run(Executor.java:408)