\n * DO NOT list the name by doing using literal.class.getName() as this will implicitly get you\n * to load the class during the test, and produce a failure.\n *
\n * Limitations: if the class is being loaded using the bootstrap classloader we\n * can't check it. Most Quarkus extensions and frameworks will not use the bootstrap classloader,\n * but some code could make use of it explicitly.\n *\n * @param vetoedClassName the fully qualified class name\n * @return this, for method chaining.\n */\n public Builder neverLoadedClassName(String vetoedClassName) {\n Objects.requireNonNull(vetoedClassName);\n final boolean add = vetoedClasses.add(vetoedClassName);\n if (!add)\n throw new ClassLoaderLimiterConsistencyException(\n \"never loaded class listed multiple times: \" + vetoedClassName);\n return this;\n }\n\n /**\n * List a fully qualified class name as one that you don't expect to be loaded at runtime.\n * If there is an attempt of loading the matched class, a runtime exception will be thrown instead:\n * useful for running integration tests to verify your assumptions.\n *
\n * DO NOT list the name by doing using literal.class.getName() as this will implicitly get you\n * to load the class during the test, and produce a failure.\n *
\n * Limitations: if the class is being loaded using the bootstrap classloader we\n * can't check it. Most Quarkus extensions and frameworks will not use the bootstrap classloader,\n * but some code could make use of it explicitly.\n *\n * @param vetoedClassName the fully qualified class name\n * @return this, for method chaining.","sourceCodeStart":122,"sourceCodeEnd":158,"githubUrl":"https://github.com/quarkusio/quarkus/blob/e1c734241f34c7919086ceb4c9262b4a58f6de44/independent-projects/bootstrap/core/src/main/java/io/quarkus/bootstrap/classloading/ClassLoaderLimiter.java#L122-L158","documentation":"Thrown by ClassLoaderLimiter.Builder.neverLoadedClassName when the same fully qualified class name is added more than once to the vetoed-classes set. The limiter requires each class name to be registered exactly once so its consistency checks at runtime stay meaningful. This is a build-time configuration bug in code constructing the limiter.","triggerScenarios":"Calling builder.neverLoadedClassName(fqcn) twice with the same class name (Set.add returns false).","commonSituations":"Multiple Quarkus extensions or build steps each registering the same class as never loaded; merging limiter configs from two sources without deduplication.","solutions":["Deduplicate class names (use a LinkedHashSet) before registering them on the builder","Guard each call so a class is registered only by the component that owns it","Remove one of the duplicate registrations"],"exampleFix":"// before\nbuilder.neverLoadedClassName(\"com.foo.Bar\");\nbuilder.neverLoadedClassName(\"com.foo.Bar\"); // throws\n// after\nSet