def content = readTrusted('somefile')

node('mynode') {
    echo content
}

[Pipeline] readTrusted
Updating http://... at revision '2016-08-19T07:47:29.338 +0200'
At revision 5146

No changes for http://... since the previous build
[Pipeline] End of Pipeline
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 org.apache.commons.digester.Digester.getFactory(Digester.java:537)
	at org.apache.commons.digester.Digester.getParser(Digester.java:791)
	at org.apache.commons.digester.Digester.getXMLReader(Digester.java:1068)
	at org.apache.commons.digester.Digester.parse(Digester.java:1871)
	at hudson.scm.SubversionChangeLogParser.parse(SubversionChangeLogParser.java:76)
	at hudson.scm.SubversionChangeLogParser.parse(SubversionChangeLogParser.java:43)
	at org.jenkinsci.plugins.workflow.job.WorkflowRun.onCheckout(WorkflowRun.java:652)
	at org.jenkinsci.plugins.workflow.job.WorkflowRun.access$1300(WorkflowRun.java:112)
	at org.jenkinsci.plugins.workflow.job.WorkflowRun$SCMListenerImpl.onCheckout(WorkflowRun.java:842)
	at org.jenkinsci.plugins.workflow.steps.scm.SCMStep.checkout(SCMStep.java:123)
	at org.jenkinsci.plugins.workflow.multibranch.ReadTrustedStep$Execution.run(ReadTrustedStep.java:119)
	at org.jenkinsci.plugins.workflow.multibranch.ReadTrustedStep$Execution.run(ReadTrustedStep.java:78)
	at org.jenkinsci.plugins.workflow.steps.AbstractSynchronousStepExecution.start(AbstractSynchronousStepExecution.java:40)
	at org.jenkinsci.plugins.workflow.cps.DSL.invokeStep(DSL.java:178)
	at org.jenkinsci.plugins.workflow.cps.DSL.invokeMethod(DSL.java:124)
	at org.jenkinsci.plugins.workflow.cps.CpsScript.invokeMethod(CpsScript.java:117)
	at groovy.lang.GroovyObject$invokeMethod$0.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.kohsuke.groovy.sandbox.impl.Checker$1.call(Checker.java:151)
	at org.kohsuke.groovy.sandbox.GroovyInterceptor.onMethodCall(GroovyInterceptor.java:21)
	at org.jenkinsci.plugins.scriptsecurity.sandbox.groovy.SandboxInterceptor.onMethodCall(SandboxInterceptor.java:115)
	at org.jenkinsci.plugins.scriptsecurity.sandbox.groovy.SandboxInterceptor.onMethodCall(SandboxInterceptor.java:103)
	at org.kohsuke.groovy.sandbox.impl.Checker$1.call(Checker.java:149)
	at org.kohsuke.groovy.sandbox.impl.Checker.checkedCall(Checker.java:146)
	at com.cloudbees.groovy.cps.sandbox.SandboxInvoker.methodCall(SandboxInvoker.java:16)
	at WorkflowScript.run(WorkflowScript:1)
	at ___cps.transform___(Native Method)
	at com.cloudbees.groovy.cps.impl.ContinuationGroup.methodCall(ContinuationGroup.java:48)
	at com.cloudbees.groovy.cps.impl.FunctionCallBlock$ContinuationImpl.dispatchOrArg(FunctionCallBlock.java:109)
	at com.cloudbees.groovy.cps.impl.FunctionCallBlock$ContinuationImpl.fixArg(FunctionCallBlock.java:82)
	at sun.reflect.GeneratedMethodAccessor527.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at com.cloudbees.groovy.cps.impl.ContinuationPtr$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:164)
	at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup.run(CpsThreadGroup.java:361)
	at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup.access$100(CpsThreadGroup.java:80)
	at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup$2.call(CpsThreadGroup.java:236)
	at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup$2.call(CpsThreadGroup.java:226)
	at org.jenkinsci.plugins.workflow.cps.CpsVmExecutorService$2.call(CpsVmExecutorService.java:47)
	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 org.apache.commons.digester.Digester.getFactory(Digester.java:537)
	at org.apache.commons.digester.Digester.getParser(Digester.java:791)
	at org.apache.commons.digester.Digester.getXMLReader(Digester.java:1068)
	at org.apache.commons.digester.Digester.parse(Digester.java:1871)
	at hudson.scm.SubversionChangeLogParser.parse(SubversionChangeLogParser.java:76)
	at hudson.scm.SubversionChangeLogParser.parse(SubversionChangeLogParser.java:43)
	at org.jenkinsci.plugins.workflow.job.WorkflowRun.onCheckout(WorkflowRun.java:652)
	at org.jenkinsci.plugins.workflow.job.WorkflowRun.access$1300(WorkflowRun.java:112)
	at org.jenkinsci.plugins.workflow.job.WorkflowRun$SCMListenerImpl.onCheckout(WorkflowRun.java:842)
	at org.jenkinsci.plugins.workflow.steps.scm.SCMStep.checkout(SCMStep.java:123)
	at org.jenkinsci.plugins.workflow.multibranch.ReadTrustedStep$Execution.run(ReadTrustedStep.java:119)
	at org.jenkinsci.plugins.workflow.multibranch.ReadTrustedStep$Execution.run(ReadTrustedStep.java:78)
	at org.jenkinsci.plugins.workflow.steps.AbstractSynchronousStepExecution.start(AbstractSynchronousStepExecution.java:40)
	at org.jenkinsci.plugins.workflow.cps.DSL.invokeStep(DSL.java:178)
	at org.jenkinsci.plugins.workflow.cps.DSL.invokeMethod(DSL.java:124)
	at org.jenkinsci.plugins.workflow.cps.CpsScript.invokeMethod(CpsScript.java:117)
	at groovy.lang.GroovyObject$invokeMethod$0.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.kohsuke.groovy.sandbox.impl.Checker$1.call(Checker.java:151)
	at org.kohsuke.groovy.sandbox.GroovyInterceptor.onMethodCall(GroovyInterceptor.java:21)
	at org.jenkinsci.plugins.scriptsecurity.sandbox.groovy.SandboxInterceptor.onMethodCall(SandboxInterceptor.java:115)
	at org.jenkinsci.plugins.scriptsecurity.sandbox.groovy.SandboxInterceptor.onMethodCall(SandboxInterceptor.java:103)
	at org.kohsuke.groovy.sandbox.impl.Checker$1.call(Checker.java:149)
	at org.kohsuke.groovy.sandbox.impl.Checker.checkedCall(Checker.java:146)
	at com.cloudbees.groovy.cps.sandbox.SandboxInvoker.methodCall(SandboxInvoker.java:16)
	... 29 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)
	... 57 more
Finished: FAILURE