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NoSuchMethodError

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Cognitive Technology Team
Cognitive Technology Team
Sep 3, 2022 · Backend Development

Diagnosing NoSuchMethodError and NoSuchFieldError in Spring Boot Jar Packages

This article explains why a Spring Boot application that runs fine in an IDE may throw NoSuchMethodError or NoSuchFieldError when packaged as an executable jar, and provides systematic steps—including JVM class‑loading flags, Maven enforcer rules, and class‑path inspection—to locate and resolve the root cause.

Backend DevelopmentClass LoadingNoSuchMethodError
0 likes · 6 min read
Diagnosing NoSuchMethodError and NoSuchFieldError in Spring Boot Jar Packages
Cognitive Technology Team
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.

Backend DevelopmentClass LoadingDuplicate Classes
0 likes · 4 min read
Resolving NoSuchMethodError Caused by Duplicate Classes with Different Method Signatures in Java Projects