Webjars broken with Quarkus 3.16 due to an exception in Classgraph #891
Description
In code that worked with Quarkus 3.15, I am now getting the following exception after upgrading to Quarkus 3.16:
java.lang.RuntimeException: Exception while calling findClassLoaderOrder for nonapi.io.github.classgraph.classloaderhandler.QuarkusClassLoaderHandler
at nonapi.io.github.classgraph.classloaderhandler.ClassLoaderHandlerRegistry$ClassLoaderHandlerRegistryEntry.findClasspathOrder(ClassLoaderHandlerRegistry.java:239)
at nonapi.io.github.classgraph.classpath.ClasspathFinder.<init>(ClasspathFinder.java:277)
at io.github.classgraph.Scanner.<init>(Scanner.java:170)
at io.github.classgraph.ClassGraph.scanAsync(ClassGraph.java:1562)
at io.github.classgraph.ClassGraph.scanAsync(ClassGraph.java:1590)
at io.github.classgraph.ClassGraph.scan(ClassGraph.java:1615)
at io.github.classgraph.ClassGraph.scan(ClassGraph.java:1654)
at io.github.classgraph.ClassGraph.scan(ClassGraph.java:1667)
at org.webjars.WebJarAssetLocator.scanForWebJars(WebJarAssetLocator.java:188)
at org.webjars.WebJarAssetLocator.<init>(WebJarAssetLocator.java:210)
at org.webjars.WebJarAssetLocator.<init>(WebJarAssetLocator.java:198)
...
Caused by: java.lang.reflect.InvocationTargetException
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:115)
at java.base/java.lang.reflect.Method.invoke(Method.java:580)
at nonapi.io.github.classgraph.classloaderhandler.ClassLoaderHandlerRegistry$ClassLoaderHandlerRegistryEntry.findClasspathOrder(ClassLoaderHandlerRegistry.java:236)
... 21 more
Caused by: java.lang.NullPointerException: Cannot invoke "java.util.Collection.iterator()" because the return value of "nonapi.io.github.classgraph.reflection.ReflectionUtils.getFieldVal(boolean, Object, String)" is null
at nonapi.io.github.classgraph.classloaderhandler.QuarkusClassLoaderHandler.findClasspathOrderForQuarkusClassloader(QuarkusClassLoaderHandler.java:120)
at nonapi.io.github.classgraph.classloaderhandler.QuarkusClassLoaderHandler.findClasspathOrder(QuarkusClassLoaderHandler.java:111)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
... 23 more
The following code in Classgraph seems to trigger the exception:
for (final Object element : (Collection<Object>) classpathOrder.reflectionUtils.getFieldVal(false,
classLoader, "elements")) {
...
}
I'm assuming some behavior of the Quarkus ClassLoader changed in 3.16? I do not know any details about this though.
I attempted manually forcing the latest version of Classgraph (4.8.177), but exception persists.
$ java -version
openjdk version "21.0.5" 2024-10-15 LTS
OpenJDK Runtime Environment Temurin-21.0.5+11 (build 21.0.5+11-LTS)
OpenJDK 64-Bit Server VM Temurin-21.0.5+11 (build 21.0.5+11-LTS, mixed mode, sharing)