Support running on Java 11 -------------------------- Key: JASSIST-271 URL: https://issues.jboss.org/browse/JASSIST-271 Project: Javassist Issue Type: Enhancement Affects Versions: 3.22.0-GA Environment: Java 11 Reporter: Christian Beikov Assignee: Shigeru Chiba The GitHub issue describes the problem when running on Java 11 and also has a hint for a fix: https://github.com/jboss-javassist/javassist/issues/194 The main problem is that {{Unsafe.defineClass}} was removed in Java 11 and Javassist always tries to define classes through that method for JVMs >= 9 which leads to an error.