We make use of the ConcurrentLinkedQueue class, and which is not white-listed like other concurrent collections are. The unmarshalling and marshalling of the field fails with the following error:

Feb 28, 2018 9:08:22 AM WARNING jenkins.security.ClassFilterImpl lambda$isBlacklisted$1
java.util.concurrent.ConcurrentLinkedQueue in JRE might be dangerous, so rejecting; see https://jenkins.io/redirect/class-filter/

java.lang.UnsupportedOperationException: Refusing to marshal java.util.concurrent.ConcurrentLinkedQueue for security reasons; see https://jenkins.io/redirect/class-filter/
    at hudson.util.XStream2$BlacklistedTypesConverter.marshal(XStream2.java:543)
    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)