FATAL: Failed to serialize com.tikal.jenkins.plugins.multijob.MultiJobBuild#subBuilds for class com.tikal.jenkins.plugins.multijob.MultiJobBuild
java.lang.RuntimeException: Failed to serialize com.tikal.jenkins.plugins.multijob.MultiJobBuild#subBuilds for class com.tikal.jenkins.plugins.multijob.MultiJobBuild
	at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:167)
	at hudson.util.RobustReflectionConverter$2.visit(RobustReflectionConverter.java:135)
	at com.thoughtworks.xstream.converters.reflection.PureJavaReflectionProvider.visitSerializableFields(PureJavaReflectionProvider.java:130)
	at hudson.util.RobustReflectionConverter.doMarshal(RobustReflectionConverter.java:120)
	at hudson.util.RobustReflectionConverter.marshal(RobustReflectionConverter.java:94)
	at com.thoughtworks.xstream.core.AbstractReferenceMarshaller.convert(AbstractReferenceMarshaller.java:68)
	at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:78)
	at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:63)
	at com.thoughtworks.xstream.core.TreeMarshaller.start(TreeMarshaller.java:98)
	at com.thoughtworks.xstream.core.AbstractTreeMarshallingStrategy.marshal(AbstractTreeMarshallingStrategy.java:38)
	at com.thoughtworks.xstream.XStream.marshal(XStream.java:840)
	at com.thoughtworks.xstream.XStream.marshal(XStream.java:829)
	at com.thoughtworks.xstream.XStream.toXML(XStream.java:804)
	at hudson.XmlFile.write(XmlFile.java:177)
	at org.jvnet.hudson.plugins.DownstreamBuildViewUpdateListener.save(DownstreamBuildViewUpdateListener.java:105)
	at org.jvnet.hudson.plugins.DownstreamBuildViewUpdateListener.onStarted(DownstreamBuildViewUpdateListener.java:91)
	at org.jvnet.hudson.plugins.DownstreamBuildViewUpdateListener.onStarted(DownstreamBuildViewUpdateListener.java:46)
	at hudson.model.listeners.RunListener.fireStarted(RunListener.java:188)
	at hudson.model.Run.execute(Run.java:1497)
	at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:46)
	at hudson.model.ResourceController.execute(ResourceController.java:88)
	at hudson.model.Executor.run(Executor.java:237)
Caused by: java.util.ConcurrentModificationException
	at java.util.AbstractList$Itr.checkForComodification(AbstractList.java:372)
	at java.util.AbstractList$Itr.next(AbstractList.java:343)
	at com.thoughtworks.xstream.converters.collections.CollectionConverter.marshal(CollectionConverter.java:54)
	at com.thoughtworks.xstream.core.AbstractReferenceMarshaller.convert(AbstractReferenceMarshaller.java:68)
	at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:78)
	at hudson.util.RobustReflectionConverter.marshallField(RobustReflectionConverter.java:176)
	at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:163)
	... 21 more