FATAL: Failed to serialize hudson.model.Actionable#actions for class hudson.model.FreeStyleBuild
java.lang.RuntimeException: Failed to serialize hudson.model.Actionable#actions for class hudson.model.FreeStyleBuild
	at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:215)
	at hudson.util.RobustReflectionConverter$2.visit(RobustReflectionConverter.java:183)
	at com.thoughtworks.xstream.converters.reflection.PureJavaReflectionProvider.visitSerializableFields(PureJavaReflectionProvider.java:138)
	at hudson.util.RobustReflectionConverter.doMarshal(RobustReflectionConverter.java:168)
	at hudson.util.RobustReflectionConverter.marshal(RobustReflectionConverter.java:109)
	at com.thoughtworks.xstream.core.AbstractReferenceMarshaller.convert(AbstractReferenceMarshaller.java:69)
	at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:58)
	at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:43)
	at com.thoughtworks.xstream.core.TreeMarshaller.start(TreeMarshaller.java:82)
	at com.thoughtworks.xstream.core.AbstractTreeMarshallingStrategy.marshal(AbstractTreeMarshallingStrategy.java:37)
	at com.thoughtworks.xstream.XStream.marshal(XStream.java:1026)
	at com.thoughtworks.xstream.XStream.marshal(XStream.java:1015)
	at com.thoughtworks.xstream.XStream.toXML(XStream.java:988)
	at hudson.XmlFile.write(XmlFile.java:178)
	at hudson.model.Run.save(Run.java:1896)
	at hudson.model.Run.setDisplayName(Run.java:784)
	at org.jenkinsci.plugins.buildnamesetter.BuildNameSetter.setDisplayName(BuildNameSetter.java:50)
	at org.jenkinsci.plugins.buildnamesetter.BuildNameSetter.setUp(BuildNameSetter.java:37)
	at hudson.model.Build$BuildExecution.doRun(Build.java:156)
	at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:534)
	at hudson.model.Run.execute(Run.java:1738)
	at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:43)
	at hudson.model.ResourceController.execute(ResourceController.java:98)
	at hudson.model.Executor.run(Executor.java:410)
Caused by: java.lang.RuntimeException: Failed to serialize com.tikal.jenkins.plugins.multijob.MultiJobBuilder$MultiJobAction#build for class com.tikal.jenkins.plugins.multijob.MultiJobBuilder$MultiJobAction
	at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:215)
	at hudson.util.RobustReflectionConverter$2.visit(RobustReflectionConverter.java:183)
	at com.thoughtworks.xstream.converters.reflection.PureJavaReflectionProvider.visitSerializableFields(PureJavaReflectionProvider.java:138)
	at hudson.util.RobustReflectionConverter.doMarshal(RobustReflectionConverter.java:168)
	at hudson.util.RobustReflectionConverter.marshal(RobustReflectionConverter.java:109)
	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:224)
	at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:211)
	... 23 more
Caused by: java.lang.RuntimeException: Failed to serialize com.tikal.jenkins.plugins.multijob.MultiJobBuild#subBuildsMap for class com.tikal.jenkins.plugins.multijob.MultiJobBuild
	at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:215)
	at hudson.util.RobustReflectionConverter$2.visit(RobustReflectionConverter.java:183)
	at com.thoughtworks.xstream.converters.reflection.PureJavaReflectionProvider.visitSerializableFields(PureJavaReflectionProvider.java:138)
	at hudson.util.RobustReflectionConverter.doMarshal(RobustReflectionConverter.java:168)
	at hudson.util.RobustReflectionConverter.marshal(RobustReflectionConverter.java:109)
	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:224)
	at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:211)
	... 38 more
Caused by: java.util.ConcurrentModificationException
	{{monospaced text}}at java.util.HashMap$HashIterator.nextNode(HashMap.java:1429)
	at java.util.HashMap$EntryIterator.next(HashMap.java:1463)
	at java.util.HashMap$EntryIterator.next(HashMap.java:1461)
	at com.thoughtworks.xstream.converters.collections.MapConverter.marshal(MapConverter.java:75)
	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:224)
	at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:211)
	... 47 more