IllegalStateException: No standard field found for reverse order comparator! ---------------------------------------------------------------------------- Key: REMJMX-167 URL: https://issues.jboss.org/browse/REMJMX-167 Project: Remoting JMX Issue Type: Bug Affects Versions: 3.0.3.Final Reporter: Andres Luuk Priority: Major https://github.com/jbossas/remoting-jmx/issues/41 You are also affected with: https://developer.jboss.org/thread/279791 https://209.132.182.82/browse/WFLY-11720?focusedCommentId=13697026&pa... jboss-marshalling should probably be updated. I got the same error as on those cases when I upgraded to java 11. java.lang.ExceptionInInitializerError at org.jboss.marshalling.river.RiverMarshaller.<clinit>(RiverMarshaller.java:1335) at org.jboss.marshalling.river.RiverMarshallerFactory.createMarshaller(RiverMarshallerFactory.java:54) ... Caused by: java.lang.IllegalStateException: No standard field found for reverse order comparator! at org.jboss.marshalling.river.Protocol.<clinit>(Protocol.java:287) ... 9 more But because I got it a few months ago (I posted it to your github, but got no responce from there) I can't provide any details on how to reproduce it. After a few days of debugging I tracked the cause down to the pre-JDK11 jboss-marshalling version you are depending on.