in-fke opened a new issue, #1290: URL: https://github.com/apache/maven-javadoc-plugin/issues/1290
### Affected version 3.12.0 ### Bug description Getting this ERROR though even "-X" is **not** telling me which Artifact is making the problem. To make it more verbose about the artifact that's causing issues, this line https://github.com/apache/maven-javadoc-plugin/blob/maven-javadoc-plugin-3.12.0/src/main/java/org/apache/maven/plugins/javadoc/AbstractJavadocMojo.java#L2607 should catch any exception and render the artifact in question. Somewhat related: https://github.com/apache/maven-resolver/issues/1269 ``` [DEBUG] add additional artifact with path C:\dev\M3_REPO\org\apache\logging\log4j\log4j-core\2.25.2\log4j-core-2.25.2.jar [INFO] ------------------------------------------------------------------------ [INFO] BUILD FAILURE [INFO] ------------------------------------------------------------------------ [INFO] Total time: 28.878 s (Wall Clock) [INFO] Finished at: 2025-11-16T22:10:23+01:00 [INFO] ------------------------------------------------------------------------ [ERROR] Failed to execute goal org.apache.maven.plugins:maven-javadoc-plugin:3.12.0:javadoc (attach-javadocs) on project NNN: Execution attach-javadocs of goal org.apache.maven.plugins:maven-javadoc-plugin:3.12.0:javadoc failed: version can neither be null, empty nor blank -> [Help 1] org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.apache.maven.plugins:maven-javadoc-plugin:3.12.0:javadoc (attach-javadocs) on project NNN: Execution attach-javadocs of goal org.apache.maven.plugins:maven-javadoc-plugin:3.12.0:javadoc failed: version can neither be null, empty nor blank 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.builder.multithreaded.MultiThreadedBuilder$1.call (MultiThreadedBuilder.java:193) at org.apache.maven.lifecycle.internal.builder.multithreaded.MultiThreadedBuilder$1.call (MultiThreadedBuilder.java:180) at java.util.concurrent.FutureTask.run (FutureTask.java:264) at java.util.concurrent.Executors$RunnableAdapter.call (Executors.java:539) at java.util.concurrent.FutureTask.run (FutureTask.java:264) at java.util.concurrent.ThreadPoolExecutor.runWorker (ThreadPoolExecutor.java:1136) at java.util.concurrent.ThreadPoolExecutor$Worker.run (ThreadPoolExecutor.java:635) at java.lang.Thread.run (Thread.java:840) Caused by: org.apache.maven.plugin.PluginExecutionException: Execution attach-javadocs of goal org.apache.maven.plugins:maven-javadoc-plugin:3.12.0:javadoc failed: version can neither be null, empty nor blank at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo (DefaultBuildPluginManager.java:133) at org.apache.maven.lifecycle.internal.MojoExecutor.doExecute2 (MojoExecutor.java:328) 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.builder.multithreaded.MultiThreadedBuilder$1.call (MultiThreadedBuilder.java:193) at org.apache.maven.lifecycle.internal.builder.multithreaded.MultiThreadedBuilder$1.call (MultiThreadedBuilder.java:180) at java.util.concurrent.FutureTask.run (FutureTask.java:264) at java.util.concurrent.Executors$RunnableAdapter.call (Executors.java:539) at java.util.concurrent.FutureTask.run (FutureTask.java:264) at java.util.concurrent.ThreadPoolExecutor.runWorker (ThreadPoolExecutor.java:1136) at java.util.concurrent.ThreadPoolExecutor$Worker.run (ThreadPoolExecutor.java:635) at java.lang.Thread.run (Thread.java:840) Caused by: java.lang.IllegalArgumentException: version can neither be null, empty nor blank at org.apache.commons.lang3.Validate.notBlank (Validate.java:782) at org.apache.maven.artifact.ArtifactUtils.notBlank (ArtifactUtils.java:94) at org.apache.maven.artifact.ArtifactUtils.key (ArtifactUtils.java:86) at org.apache.maven.ReactorReader.findArtifact (ReactorReader.java:96) at org.eclipse.aether.internal.impl.DefaultArtifactResolver.resolve (DefaultArtifactResolver.java:350) at org.eclipse.aether.internal.impl.DefaultArtifactResolver.resolveArtifacts (DefaultArtifactResolver.java:261) at org.eclipse.aether.internal.impl.DefaultArtifactResolver.resolveArtifact (DefaultArtifactResolver.java:243) at org.eclipse.aether.internal.impl.DefaultRepositorySystem.resolveArtifact (DefaultRepositorySystem.java:278) at org.apache.maven.plugins.javadoc.AbstractJavadocMojo.resolveDependency (AbstractJavadocMojo.java:2605) at org.apache.maven.plugins.javadoc.AbstractJavadocMojo.getPathElements (AbstractJavadocMojo.java:2579) at org.apache.maven.plugins.javadoc.AbstractJavadocMojo.addJavadocOptions (AbstractJavadocMojo.java:4554) at org.apache.maven.plugins.javadoc.AbstractJavadocMojo.executeReport (AbstractJavadocMojo.java:1998) at org.apache.maven.plugins.javadoc.JavadocReport.generate (JavadocReport.java:142) at org.apache.maven.plugins.javadoc.JavadocReport.doExecute (JavadocReport.java:307) at org.apache.maven.plugins.javadoc.AbstractJavadocMojo.execute (AbstractJavadocMojo.java:1851) at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo (DefaultBuildPluginManager.java:126) at org.apache.maven.lifecycle.internal.MojoExecutor.doExecute2 (MojoExecutor.java:328) 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.builder.multithreaded.MultiThreadedBuilder$1.call (MultiThreadedBuilder.java:193) at org.apache.maven.lifecycle.internal.builder.multithreaded.MultiThreadedBuilder$1.call (MultiThreadedBuilder.java:180) at java.util.concurrent.FutureTask.run (FutureTask.java:264) at java.util.concurrent.Executors$RunnableAdapter.call (Executors.java:539) at java.util.concurrent.FutureTask.run (FutureTask.java:264) at java.util.concurrent.ThreadPoolExecutor.runWorker (ThreadPoolExecutor.java:1136) at java.util.concurrent.ThreadPoolExecutor$Worker.run (ThreadPoolExecutor.java:635) at java.lang.Thread.run (Thread.java:840) [ERROR] [ERROR] [ERROR] For more information about the errors and possible solutions, please read the following articles: [ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/PluginExecutionException ``` adding `<verbose>true</verbose>` or `<debug>true</debug>` did not help to pinpoint the problem. Then, turned out I was using ``` <additionalDependency> <groupId>jakarta.servlet</groupId> <artifactId>jakarta.servlet-api</artifactId> <version>${version.servlet}</version> </additionalDependency> ``` and the property `version.servlet` was not set! So I wonder why this resolved to a **blank string**!? Which mechanism resolved to a (presumably) blank string and should not there be a warning about unresolved properties? -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
