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https://issues.apache.org/jira/browse/MJAVADOC-582?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17957964#comment-17957964
]
Olivier Lamy commented on MJAVADOC-582:
---------------------------------------
This project has moved from Jira to GitHub Issues. This issue was migrated to
[apache/maven-javadoc-plugin#870|https://github.com/apache/maven-javadoc-plugin/issues/870].
> Getting "Unsupported class file major version 55" when trying to run Javadoc
> ----------------------------------------------------------------------------
>
> Key: MJAVADOC-582
> URL: https://issues.apache.org/jira/browse/MJAVADOC-582
> Project: Maven Javadoc Plugin (Moved to GitHub Issues)
> Issue Type: Bug
> Components: javadoc
> Affects Versions: 3.0.1
> Environment: I have managed to reproduce this with WIndows and Linux
> computers running Java 11. With Java 10 it seems to work fine.
> Reporter: Keeyan Nejad
> Assignee: Robert Scholte
> Priority: Minor
>
> When running `mvn javadoc:javadoc -e` on a Java 11 project I get the below
> error. This seems to only be happening with Java 11. The maven plugin works
> fine for Java 10.
> I have stripped my project down to the bare minimum where I could reproduce
> it. Currently the project has 2 sub modules along with a pom file (content
> listed below)
> pom.xml
> core/ (sub-module)
> emulator/ (sub-module)
> ```
> [ERROR] Failed to execute goal
> org.apache.maven.plugins:maven-javadoc-plugin:3.0.1:javadoc (default-cli) on
> project emulator: Execution default-cli of goal
> org.apache.maven.plugins:maven-javadoc-plugin:3.0.1:javadoc failed:
> Unsupported class file major version 55 -> [Help 1]
> org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute
> goal org.apache.maven.plugins:maven-javadoc-plugin:3.0.1:javadoc
> (default-cli) on project emulator: Execution default-cli of goal
> org.apache.maven.plugins:maven-javadoc-plugin:3.0.1:javadoc failed:
> Unsupported class file major version 55
> at org.apache.maven.lifecycle.internal.MojoExecutor.execute
> (MojoExecutor.java:215)
> at org.apache.maven.lifecycle.internal.MojoExecutor.execute
> (MojoExecutor.java:156)
> at org.apache.maven.lifecycle.internal.MojoExecutor.execute
> (MojoExecutor.java:148)
> 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:288)
> at org.apache.maven.cli.MavenCli.main (MavenCli.java:192)
> at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
> at jdk.internal.reflect.NativeMethodAccessorImpl.invoke
> (NativeMethodAccessorImpl.java:62)
> at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke
> (DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke (Method.java:566)
> at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced
> (Launcher.java:289)
> at org.codehaus.plexus.classworlds.launcher.Launcher.launch
> (Launcher.java:229)
> at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode
> (Launcher.java:415)
> at org.codehaus.plexus.classworlds.launcher.Launcher.main (Launcher.java:356)
> Caused by: org.apache.maven.plugin.PluginExecutionException: Execution
> default-cli of goal
> org.apache.maven.plugins:maven-javadoc-plugin:3.0.1:javadoc failed:
> Unsupported class file major version 55
> at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo
> (DefaultBuildPluginManager.java:148)
> at org.apache.maven.lifecycle.internal.MojoExecutor.execute
> (MojoExecutor.java:210)
> at org.apache.maven.lifecycle.internal.MojoExecutor.execute
> (MojoExecutor.java:156)
> at org.apache.maven.lifecycle.internal.MojoExecutor.execute
> (MojoExecutor.java:148)
> 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:288)
> at org.apache.maven.cli.MavenCli.main (MavenCli.java:192)
> at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
> at jdk.internal.reflect.NativeMethodAccessorImpl.invoke
> (NativeMethodAccessorImpl.java:62)
> at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke
> (DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke (Method.java:566)
> at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced
> (Launcher.java:289)
> at org.codehaus.plexus.classworlds.launcher.Launcher.launch
> (Launcher.java:229)
> at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode
> (Launcher.java:415)
> at org.codehaus.plexus.classworlds.launcher.Launcher.main (Launcher.java:356)
> Caused by: java.lang.IllegalArgumentException: Unsupported class file major
> version 55
> at org.objectweb.asm.ClassReader.<init> (ClassReader.java:166)
> at org.objectweb.asm.ClassReader.<init> (ClassReader.java:148)
> at org.objectweb.asm.ClassReader.<init> (ClassReader.java:136)
> at org.objectweb.asm.ClassReader.<init> (ClassReader.java:237)
> at org.codehaus.plexus.languages.java.jpms.AsmModuleInfoParser.parse
> (AsmModuleInfoParser.java:115)
> at
> org.codehaus.plexus.languages.java.jpms.AsmModuleInfoParser.getModuleDescriptor
> (AsmModuleInfoParser.java:99)
> at org.codehaus.plexus.languages.java.jpms.LocationManager.resolvePaths
> (LocationManager.java:127)
> at org.apache.maven.plugins.javadoc.AbstractJavadocMojo.addJavadocOptions
> (AbstractJavadocMojo.java:4696)
> at org.apache.maven.plugins.javadoc.AbstractJavadocMojo.executeReport
> (AbstractJavadocMojo.java:2069)
> 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:1912)
> at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo
> (DefaultBuildPluginManager.java:137)
> at org.apache.maven.lifecycle.internal.MojoExecutor.execute
> (MojoExecutor.java:210)
> at org.apache.maven.lifecycle.internal.MojoExecutor.execute
> (MojoExecutor.java:156)
> at org.apache.maven.lifecycle.internal.MojoExecutor.execute
> (MojoExecutor.java:148)
> 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:288)
> at org.apache.maven.cli.MavenCli.main (MavenCli.java:192)
> at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
> at jdk.internal.reflect.NativeMethodAccessorImpl.invoke
> (NativeMethodAccessorImpl.java:62)
> at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke
> (DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke (Method.java:566)
> at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced
> (Launcher.java:289)
> at org.codehaus.plexus.classworlds.launcher.Launcher.launch
> (Launcher.java:229)
> at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode
> (Launcher.java:415)
> at org.codehaus.plexus.classworlds.launcher.Launcher.main (Launcher.java:356)
> [ERROR]
> [ERROR] Re-run Maven using the -X switch to enable full debug logging.
> [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
> [ERROR]
> [ERROR] After correcting the problems, you can resume the build with the
> command
> [ERROR] mvn <goals> -rf :emulator
>
> ```
>
> ```
>
> <?xml version="1.0" encoding="UTF-8"?>
> <project xmlns="http://maven.apache.org/POM/4.0.0";
> xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
> xsi:schemaLocation="http://maven.apache.org/POM/4.0.0
> http://maven.apache.org/xsd/maven-4.0.0.xsd";>
> <modelVersion>4.0.0</modelVersion>
> <groupId>...</groupId>
> <artifactId>...</artifactId>
> <version>0.0.1-SNAPSHOT</version>
> <packaging>pom</packaging>
> <modules>
> <module>core</module>
> <module>emulator</module>
> </modules>
> <build>
> <plugins>
> <plugin>
> <groupId>org.apache.maven.plugins</groupId>
> <artifactId>maven-compiler-plugin</artifactId>
> <version>3.8.0</version>
> <configuration>
> <source>11</source>
> <target>11</target>
> </configuration>
> </plugin>
> <plugin>
> <groupId>org.apache.maven.plugins</groupId>
> <artifactId>maven-javadoc-plugin</artifactId>
> <version>3.0.1</version>
> <configuration>
> <source>11</source>
> <target>11</target>
> </configuration>
> </plugin>
> </plugins>
> </build>
> <properties>
> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
> </properties>
> </project>
> ```
>
> The emulator module is currently just a single empty class.
>
> I don't know what other information I can provide but I'll try to help as
> much as possible if you ask for anything else
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