ConversionException: Refusing to unmarshal textBuilder for security reasons; see https://jenkins.io/redirect/class-filter/ 
---- Debugging information ---- 
class : java.lang.StringBuilder 
required-type : java.lang.StringBuilder 
converter-type : hudson.util.XStream2$BlacklistedTypesConverter 
path : /flow-build/actions/org.jvnet.hudson.plugins.groovypostbuild.GroovyPostbuildSummaryAction/textBuilder 
line number : 120 
-------------------------------

Jan 13, 2018 5:00:30 AM org.jenkinsci.plugins.workflow.cps.CpsFlowExecution notifyListeners
WARNING: null
java.io.IOException: java.lang.RuntimeException: Failed to serialize hudson.model.Actionable#actions for class org.jenkinsci.plugins.workflow.job.WorkflowRun
        at hudson.XmlFile.write(XmlFile.java:201)
        at org.jenkinsci.plugins.workflow.support.PipelineIOUtils.writeByXStream(PipelineIOUtils.java:30)
        at org.jenkinsci.plugins.workflow.job.WorkflowRun.save(WorkflowRun.java:1067)
        at hudson.BulkChange.commit(BulkChange.java:98)
        at org.jenkinsci.plugins.workflow.cps.CpsFlowExecution.notifyListeners(CpsFlowExecution.java:1346)
        at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup$3.run(CpsThreadGroup.java:412)
        at org.jenkinsci.plugins.workflow.cps.CpsVmExecutorService$1.run(CpsVmExecutorService.java:35)
        at hudson.remoting.SingleLaneExecutorService$1.run(SingleLaneExecutorService.java:131)
        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:748)
Caused by: java.lang.RuntimeException: Failed to serialize hudson.model.Actionable#actions for class org.jenkinsci.plugins.workflow.job.WorkflowRun
        at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:256)
        at hudson.util.RobustReflectionConverter$2.visit(RobustReflectionConverter.java:224)
        at com.thoughtworks.xstream.converters.reflection.PureJavaReflectionProvider.visitSerializableFields(PureJavaReflectionProvider.java:138)
        at hudson.util.RobustReflectionConverter.doMarshal(RobustReflectionConverter.java:209)
        at hudson.util.RobustReflectionConverter.marshal(RobustReflectionConverter.java:150)
        at com.thoughtworks.xstream.core.AbstractReferenceMarshaller.convert(AbstractReferenceMarshaller.java:69)
        at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:58)
        at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:43)
        at com.thoughtworks.xstream.core.TreeMarshaller.start(TreeMarshaller.java:82)
        at com.thoughtworks.xstream.core.AbstractTreeMarshallingStrategy.marshal(AbstractTreeMarshallingStrategy.java:37)
        at com.thoughtworks.xstream.XStream.marshal(XStream.java:1026)
        at com.thoughtworks.xstream.XStream.marshal(XStream.java:1015)
        at com.thoughtworks.xstream.XStream.toXML(XStream.java:988)
        at hudson.XmlFile.write(XmlFile.java:194)
        ... 13 more
Caused by: java.lang.RuntimeException: Failed to serialize org.jvnet.hudson.plugins.groovypostbuild.GroovyPostbuildSummaryAction#textBuilder for class org.jvnet.hudson.plugins.groovypostbuild.GroovyPostbuildSummaryAction
        at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:256)
        at hudson.util.RobustReflectionConverter$2.visit(RobustReflectionConverter.java:224)
        at com.thoughtworks.xstream.converters.reflection.PureJavaReflectionProvider.visitSerializableFields(PureJavaReflectionProvider.java:138)
        at hudson.util.RobustReflectionConverter.doMarshal(RobustReflectionConverter.java:209)
        at hudson.util.RobustReflectionConverter.marshal(RobustReflectionConverter.java:150)
        at com.thoughtworks.xstream.core.AbstractReferenceMarshaller.convert(AbstractReferenceMarshaller.java:69)
        at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:58)
        at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:43)
        at com.thoughtworks.xstream.core.AbstractReferenceMarshaller$1.convertAnother(AbstractReferenceMarshaller.java:88)
        at com.thoughtworks.xstream.converters.collections.AbstractCollectionConverter.writeItem(AbstractCollectionConverter.java:64)
        at com.thoughtworks.xstream.converters.collections.CollectionConverter.marshal(CollectionConverter.java:74)
        at com.thoughtworks.xstream.core.AbstractReferenceMarshaller.convert(AbstractReferenceMarshaller.java:69)
        at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:58)
        at com.thoughtworks.xstream.core.AbstractReferenceMarshaller$1.convertAnother(AbstractReferenceMarshaller.java:84)
        at hudson.util.RobustReflectionConverter.marshallField(RobustReflectionConverter.java:265)
        at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:252)
        ... 26 more
Caused by: java.lang.UnsupportedOperationException: Refusing to marshal java.lang.StringBuilder for security reasons; see https://jenkins.io/redirect/class-filter/
        at hudson.util.XStream2$BlacklistedTypesConverter.marshal(XStream2.java:530)
        at com.thoughtworks.xstream.core.AbstractReferenceMarshaller.convert(AbstractReferenceMarshaller.java:69)
        at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:58)
        at com.thoughtworks.xstream.core.AbstractReferenceMarshaller$1.convertAnother(AbstractReferenceMarshaller.java:84)
        at hudson.util.RobustReflectionConverter.marshallField(RobustReflectionConverter.java:265)
        at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:252)
        ... 41 more