[MJAVADOC-522] Javadoc generation broken on JDK 10 (Commons Lang3 gives NullPointerException)

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Duplicate
• Affects Version/s: 3.0.0
• Component/s: javadoc
• Environment: * JDK 10 ; * Maven 3.5.3 ; * Maven Javadoc plugin 3.0.0
• Assignee: Robert Scholte
• Reporter: Daniel Fernández
• Created: 29/Mar/18 23:11
• Updated: 21/May/18 10:05
• Resolved: 21/May/18 10:05

Description

Executing javadoc:javadoc in JDK 10 throws a NullPointerException caused by Apache Commons Lang 3.5:

Caused by: java.lang.NullPointerException at org.apache.commons.lang3.SystemUtils.isJavaVersionAtLeast (SystemUtils.java:1626) at org.apache.maven.plugins.javadoc.AbstractJavadocMojo.getJavadocExecutable (AbstractJavadocMojo.java:3683) at org.apache.maven.plugins.javadoc.AbstractJavadocMojo.executeReport (AbstractJavadocMojo.java:2001) at org.apache.maven.plugins.javadoc.JavadocReport.generate (JavadocReport.java:134) at org.apache.maven.plugins.javadoc.JavadocReport.doExecute (JavadocReport.java:329) at org.apache.maven.plugins.javadoc.AbstractJavadocMojo.execute (AbstractJavadocMojo.java:1909) at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo (DefaultBuildPluginManager.java:137) at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:208) at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:154) at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:146) at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:117) at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:81) at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build (SingleThreadedBuilder.java:56) at org.apache.maven.lifecycle.internal.LifecycleStarter.execute (LifecycleStarter.java:128) at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:305) at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:192) at org.apache.maven.DefaultMaven.execute (DefaultMaven.java:105) at org.apache.maven.cli.MavenCli.execute (MavenCli.java:956) at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:290) at org.apache.maven.cli.MavenCli.main (MavenCli.java:194) at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
...

The reason for this is LANG-1365 which was fixed in this commit.

Updating to Apache Commons Lang 3.7 should solve the issue.

 

Issue Links

• duplicates: MJAVADOC-517 NPE under Java 10 RC