def rootNode = new XmlSlurper().parseText(
            '''<root>
                 <a>one!</a>
                 <a>two!</a>
               </root>''' )
        
assert rootNode.a.size() == 2

javax.xml.parsers.FactoryConfigurationError: Provider for class javax.xml.parsers.SAXParserFactory cannot be created
	at javax.xml.parsers.FactoryFinder.findServiceProvider(FactoryFinder.java:311)
	at javax.xml.parsers.FactoryFinder.find(FactoryFinder.java:267)
	at javax.xml.parsers.SAXParserFactory.newInstance(SAXParserFactory.java:127)
	at groovy.xml.FactorySupport$2.run(FactorySupport.java:58)
	at java.security.AccessController.doPrivileged(Native Method)
	at groovy.xml.FactorySupport.createFactory(FactorySupport.java:35)
	at groovy.xml.FactorySupport.createSaxParserFactory(FactorySupport.java:56)
	at groovy.util.XmlSlurper.<init>(XmlSlurper.java:128)
	at groovy.util.XmlSlurper.<init>(XmlSlurper.java:114)
	at groovy.util.XmlSlurper.<init>(XmlSlurper.java:101)
	at sun.reflect.GeneratedConstructorAccessor408.newInstance(Unknown Source)
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
	at org.codehaus.groovy.reflection.CachedConstructor.invoke(CachedConstructor.java:83)
	at org.codehaus.groovy.runtime.callsite.ConstructorSite$ConstructorSiteNoUnwrapNoCoerce.callConstructor(ConstructorSite.java:105)
	at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCallConstructor(CallSiteArray.java:60)
	at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callConstructor(AbstractCallSite.java:235)
	at org.kohsuke.groovy.sandbox.impl.Checker$3.call(Checker.java:194)
	at org.kohsuke.groovy.sandbox.GroovyInterceptor.onNewInstance(GroovyInterceptor.java:40)
	at org.jenkinsci.plugins.scriptsecurity.sandbox.groovy.SandboxInterceptor.onNewInstance(SandboxInterceptor.java:128)
	at org.kohsuke.groovy.sandbox.impl.Checker$3.call(Checker.java:191)
	at org.kohsuke.groovy.sandbox.impl.Checker.checkedConstructor(Checker.java:188)
	at com.cloudbees.groovy.cps.sandbox.SandboxInvoker.constructorCall(SandboxInvoker.java:20)
	at WorkflowScript.run(WorkflowScript:33)
	at ___cps.transform___(Native Method)
	at com.cloudbees.groovy.cps.impl.FunctionCallBlock$ContinuationImpl.dispatchOrArg(FunctionCallBlock.java:96)
	at com.cloudbees.groovy.cps.impl.FunctionCallBlock$ContinuationImpl.fixName(FunctionCallBlock.java:77)
	at sun.reflect.GeneratedMethodAccessor518.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at com.cloudbees.groovy.cps.impl.ContinuationPtr$ContinuationImpl.receive(ContinuationPtr.java:72)
	at com.cloudbees.groovy.cps.impl.ConstantBlock.eval(ConstantBlock.java:21)
	at com.cloudbees.groovy.cps.Next.step(Next.java:58)
	at com.cloudbees.groovy.cps.Continuable.run0(Continuable.java:154)
	at org.jenkinsci.plugins.workflow.cps.SandboxContinuable.access$001(SandboxContinuable.java:18)
	at org.jenkinsci.plugins.workflow.cps.SandboxContinuable$1.call(SandboxContinuable.java:33)
	at org.jenkinsci.plugins.workflow.cps.SandboxContinuable$1.call(SandboxContinuable.java:30)
	at org.jenkinsci.plugins.scriptsecurity.sandbox.groovy.GroovySandbox.runInSandbox(GroovySandbox.java:108)
	at org.jenkinsci.plugins.workflow.cps.SandboxContinuable.run0(SandboxContinuable.java:30)
	at org.jenkinsci.plugins.workflow.cps.CpsThread.runNextChunk(CpsThread.java:163)
	at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup.run(CpsThreadGroup.java:328)
	at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup.access$100(CpsThreadGroup.java:80)
	at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup$2.call(CpsThreadGroup.java:240)
	at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup$2.call(CpsThreadGroup.java:228)
	at org.jenkinsci.plugins.workflow.cps.CpsVmExecutorService$2.call(CpsVmExecutorService.java:63)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at hudson.remoting.SingleLaneExecutorService$1.run(SingleLaneExecutorService.java:112)
	at jenkins.util.ContextResettingExecutorService$1.run(ContextResettingExecutorService.java:28)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.RuntimeException: Provider for class javax.xml.parsers.SAXParserFactory cannot be created
	at javax.xml.parsers.FactoryFinder.findServiceProvider(FactoryFinder.java:308)
	at javax.xml.parsers.FactoryFinder.find(FactoryFinder.java:267)
	at javax.xml.parsers.SAXParserFactory.newInstance(SAXParserFactory.java:127)
	at groovy.xml.FactorySupport$2.run(FactorySupport.java:58)
	at java.security.AccessController.doPrivileged(Native Method)
	at groovy.xml.FactorySupport.createFactory(FactorySupport.java:35)
	at groovy.xml.FactorySupport.createSaxParserFactory(FactorySupport.java:56)
	at groovy.util.XmlSlurper.<init>(XmlSlurper.java:128)
	at groovy.util.XmlSlurper.<init>(XmlSlurper.java:114)
	at groovy.util.XmlSlurper.<init>(XmlSlurper.java:101)
	at sun.reflect.GeneratedConstructorAccessor408.newInstance(Unknown Source)
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
	at org.codehaus.groovy.reflection.CachedConstructor.invoke(CachedConstructor.java:83)
	at org.codehaus.groovy.runtime.callsite.ConstructorSite$ConstructorSiteNoUnwrapNoCoerce.callConstructor(ConstructorSite.java:105)
	at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCallConstructor(CallSiteArray.java:60)
	at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callConstructor(AbstractCallSite.java:235)
	at org.kohsuke.groovy.sandbox.impl.Checker$3.call(Checker.java:194)
	at org.kohsuke.groovy.sandbox.GroovyInterceptor.onNewInstance(GroovyInterceptor.java:40)
	at org.jenkinsci.plugins.scriptsecurity.sandbox.groovy.SandboxInterceptor.onNewInstance(SandboxInterceptor.java:128)
	at org.kohsuke.groovy.sandbox.impl.Checker$3.call(Checker.java:191)
	at org.kohsuke.groovy.sandbox.impl.Checker.checkedConstructor(Checker.java:188)
	at com.cloudbees.groovy.cps.sandbox.SandboxInvoker.constructorCall(SandboxInvoker.java:20)
	... 28 more
Caused by: java.util.ServiceConfigurationError: javax.xml.parsers.SAXParserFactory: Provider org.apache.xerces.jaxp.SAXParserFactoryImpl not a subtype
	at java.util.ServiceLoader.fail(ServiceLoader.java:239)
	at java.util.ServiceLoader.access$300(ServiceLoader.java:185)
	at java.util.ServiceLoader$LazyIterator.nextService(ServiceLoader.java:376)
	at java.util.ServiceLoader$LazyIterator.next(ServiceLoader.java:404)
	at java.util.ServiceLoader$1.next(ServiceLoader.java:480)
	at javax.xml.parsers.FactoryFinder$1.run(FactoryFinder.java:294)
	at java.security.AccessController.doPrivileged(Native Method)
	at javax.xml.parsers.FactoryFinder.findServiceProvider(FactoryFinder.java:289)
	... 50 more