Cannot deploy Vaadin 24.6.6 with Maven

Hello!

I ran into a problem with deploying Vaadin 24.6.6 (jdk 19)

org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal e[32mcom.vaadin:vaadin-maven-plugin:24.6.6:prepare-frontende[m e[1m(default)e[m on project e[36mConsolidated-Asset-Solutione[m: e[1;31mnulle[m
	at org.apache.maven.lifecycle.internal.MojoExecutor.doExecute2(MojoExecutor.java:333)
	at org.apache.maven.lifecycle.internal.MojoExecutor.doExecute(MojoExecutor.java:316)
	at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:212)
	at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:174)
	at org.apache.maven.lifecycle.internal.MojoExecutor.access$000(MojoExecutor.java:75)
	at org.apache.maven.lifecycle.internal.MojoExecutor$1.run(MojoExecutor.java:162)
	at org.apache.maven.plugin.DefaultMojosExecutionStrategy.execute(DefaultMojosExecutionStrategy.java:39)
	at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:159)
	at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:105)
	at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:73)
	at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build(SingleThreadedBuilder.java:53)
	at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:118)
	at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:261)
	at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:173)
	at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:101)
	at org.apache.maven.cli.MavenCli.execute(MavenCli.java:904)
	at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:281)
	at org.apache.maven.cli.MavenCli.main(MavenCli.java:204)
	at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)
	at java.base/java.lang.reflect.Method.invoke(Method.java:578)
	at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:255)
	at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:201)
	at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:361)
	at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:314)
Caused by: org.apache.maven.plugin.MojoFailureException
	at com.vaadin.flow.plugin.maven.FlowModeAbstractMojo.execute(FlowModeAbstractMojo.java:313)
	at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:126)
	at org.apache.maven.lifecycle.internal.MojoExecutor.doExecute2(MojoExecutor.java:328)
	... 23 more
Caused by: java.lang.reflect.InvocationTargetException
	at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:119)
	at java.base/java.lang.reflect.Method.invoke(Method.java:578)
	at com.vaadin.flow.plugin.maven.FlowModeAbstractMojo.execute(FlowModeAbstractMojo.java:306)
	... 25 more
Caused by: org.apache.maven.plugin.MojoFailureException: Could not execute prepare-frontend goal.
	at com.vaadin.flow.plugin.maven.PrepareFrontendMojo.executeInternal(PrepareFrontendMojo.java:58)
	at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)
	... 27 more
Caused by: com.vaadin.flow.server.ExecutionFailedException: Error occured during goal execution: Cannot invoke "java.lang.Class.isInterface()" because the return value of "org.reflections.Reflections.forClass(String, java.lang.ClassLoader[])" is null

Please run Maven with the -e switch (or Gradle with the --stacktrace switch), to learn the full stack trace.
	at com.vaadin.flow.plugin.base.BuildFrontendUtil.prepareFrontend(BuildFrontendUtil.java:187)
	at com.vaadin.flow.plugin.maven.PrepareFrontendMojo.executeInternal(PrepareFrontendMojo.java:56)
	... 28 more
Caused by: java.lang.NullPointerException: Cannot invoke "java.lang.Class.isInterface()" because the return value of "org.reflections.Reflections.forClass(String, java.lang.ClassLoader[])" is null
	at org.reflections.Reflections.lambda$getTypesAnnotatedWith$12(Reflections.java:405)
	at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:178)
	at java.base/java.util.Iterator.forEachRemaining(Iterator.java:133)
	at java.base/java.util.Spliterators$IteratorSpliterator.forEachRemaining(Spliterators.java:1921)
	at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509)
	at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499)
	at java.base/java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:921)
	at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
	at java.base/java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:682)
	at org.reflections.util.QueryFunction.lambda$filter$3(QueryFunction.java:32)
	at org.reflections.util.QueryFunction.lambda$add$9(QueryFunction.java:66)
	at org.reflections.util.QueryFunction.lambda$add$9(QueryFunction.java:66)
	at org.reflections.util.QueryFunction.lambda$asClass$13(QueryFunction.java:89)
	at org.reflections.Reflections.get(Reflections.java:365)
	at org.reflections.Reflections.getTypesAnnotatedWith(Reflections.java:403)
	at com.vaadin.flow.server.scanner.ReflectionsClassFinder.getAnnotatedByRepeatedAnnotation(ReflectionsClassFinder.java:103)
	at com.vaadin.flow.server.scanner.ReflectionsClassFinder.getAnnotatedClasses(ReflectionsClassFinder.java:92)
	at com.vaadin.flow.server.frontend.scanner.ClassFinder$CachedClassFinder.lambda$getAnnotatedClasses$0(ClassFinder.java:154)
	at java.base/java.util.HashMap.computeIfAbsent(HashMap.java:1228)
	at com.vaadin.flow.server.frontend.scanner.ClassFinder$CachedClassFinder.getAnnotatedClasses(ClassFinder.java:153)
	at com.vaadin.flow.server.frontend.scanner.FullDependenciesScanner.discoverPackages(FullDependenciesScanner.java:264)
	at com.vaadin.flow.server.frontend.scanner.FullDependenciesScanner.<init>(FullDependenciesScanner.java:154)
	at com.vaadin.flow.server.frontend.scanner.FullDependenciesScanner.<init>(FullDependenciesScanner.java:110)
	at com.vaadin.flow.server.frontend.scanner.FrontendDependenciesScanner$FrontendDependenciesScannerFactory.createScanner(FrontendDependenciesScanner.java:103)
	at com.vaadin.flow.server.frontend.scanner.FrontendDependenciesScanner$FrontendDependenciesScannerFactory.createScanner(FrontendDependenciesScanner.java:115)
	at com.vaadin.flow.server.frontend.NodeTasks.<init>(NodeTasks.java:123)
	at com.vaadin.flow.plugin.base.BuildFrontendUtil.prepareFrontend(BuildFrontendUtil.java:181)
	... 29 more
[ERROR] 
[ERROR] 
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] e[1m[Help 1]e[m http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException

If I downgrade to Vaadin 24.5 it works

Does anyone has a clue?

Only things that come to mind, you are using “–enable-preview” which could cause problems or your JDK19… which nobody uses… JDK 17 or 21++ are tested

Seems old unused dependency in pom.xml causes this
It is fixed, thank you for your reply :+1:
We grab the chance to upgrade to JDK21 too