ClassLoader conflict detection during Java startup failure

Determine why a Java application fails to start because duplicate library versions appear in different classloader hierarchies, causing NoClassFoundError or LinkageError during initialization.

Identify which classloader is responsible for the conflict, verify whether multiple copies of the same library exist in the same hierarchy, and decide how to resolve the issue without rebuilding the application. Which classloader is responsible for loading the conflicting library version? Does the presence of multiple JAR copies in the same classloader hierarchy guarantee a LinkageError?