Cognitive Technology Team

Apr 4, 2022 · Backend Development

Resolving NoSuchMethodError Caused by Duplicate Classes with Different Method Signatures in Java Projects

When two JARs contain identically named classes and methods but differ in a method's return type, Java's class‑loading mechanism may load the wrong version, triggering a java.lang.NoSuchMethodError, which can be prevented by detecting duplicate classes with Maven Enforcer rules.