Maven: Invalid target release: 10

Question

I'm trying to compile my maven project using Java 10 but I'm having trouble. In my IDE (IntelliJ IDEA) everything compiles and runs just fine under Java 10. I installed the latest maven version 3.5.4 and pointed my JAVA_HOME to the JDK 10:

$ mvn --version Apache Maven 3.5.4 (1edded0938998edf8bf061f1ceb3cfdeccf443fe; 2018-06-17T20:33:14+02:00) Maven home: C:\Maven\bin\.. Java version: 10.0.2, vendor: Oracle Corporation, runtime: C:\Program Files\Java\jdk-10.0.2 Default locale: en_US, platform encoding: Cp1252 OS name: "windows 10", version: "10.0", arch: "amd64", family: "windows" 

The maven command I use is:

mvn package -Dmaven.test.skip 

In my pom.xml I had the following for Java 8 which worked fine:

<properties>     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>     <maven.compiler.source>1.8</maven.compiler.source>     <maven.compiler.target>1.8</maven.compiler.target>     <libraries.directory>libraries</libraries.directory> </properties> 

For Java 10 I changed it to the following:

<maven.compiler.source>10</maven.compiler.source> <maven.compiler.target>10</maven.compiler.target> 

This does not work, just like using 1.10 as the version for the source and target compiler.

The full debug logging output (-X command line switch) is the following:

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.7.0:compile (default-compile) on project My-Project: Fatal error compiling: invalid target release: 1.10 -> [Help 1] org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.7.0:compile (default-compile) on project My-Project: Fatal error compiling     at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:213)     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:954)     at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:288)     at org.apache.maven.cli.MavenCli.main (MavenCli.java:192)     at sun.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)     at sun.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:62)     at sun.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43)     at java.lang.reflect.Method.invoke (Method.java:498)     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.MojoExecutionException: Fatal error compiling     at org.apache.maven.plugin.compiler.AbstractCompilerMojo.execute (AbstractCompilerMojo.java:1086)     at org.apache.maven.plugin.compiler.CompilerMojo.execute (CompilerMojo.java:168)     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:954)     at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:288)     at org.apache.maven.cli.MavenCli.main (MavenCli.java:192)     at sun.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)     at sun.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:62)     at sun.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43)     at java.lang.reflect.Method.invoke (Method.java:498)     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.codehaus.plexus.compiler.CompilerException: invalid target release: 1.10     at org.codehaus.plexus.compiler.javac.JavaxToolsCompiler.compileInProcess (JavaxToolsCompiler.java:173)     at org.codehaus.plexus.compiler.javac.JavacCompiler.performCompile (JavacCompiler.java:174)     at org.apache.maven.plugin.compiler.AbstractCompilerMojo.execute (AbstractCompilerMojo.java:1075)     at org.apache.maven.plugin.compiler.CompilerMojo.execute (CompilerMojo.java:168)     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:954)     at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:288)     at org.apache.maven.cli.MavenCli.main (MavenCli.java:192)     at sun.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)     at sun.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:62)     at sun.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43)     at java.lang.reflect.Method.invoke (Method.java:498)     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: invalid target release: 1.10     at com.sun.tools.javac.main.OptionHelper$GrumpyHelper.error (OptionHelper.java:103)     at com.sun.tools.javac.main.Option$12.process (Option.java:216)     at com.sun.tools.javac.api.JavacTool.processOptions (JavacTool.java:217)     at com.sun.tools.javac.api.JavacTool.getTask (JavacTool.java:156)     at com.sun.tools.javac.api.JavacTool.getTask (JavacTool.java:107)     at com.sun.tools.javac.api.JavacTool.getTask (JavacTool.java:64)     at org.codehaus.plexus.compiler.javac.JavaxToolsCompiler.compileInProcess (JavaxToolsCompiler.java:125)     at org.codehaus.plexus.compiler.javac.JavacCompiler.performCompile (JavacCompiler.java:174)     at org.apache.maven.plugin.compiler.AbstractCompilerMojo.execute (AbstractCompilerMojo.java:1075)     at org.apache.maven.plugin.compiler.CompilerMojo.execute (CompilerMojo.java:168)     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:954)     at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:288)     at org.apache.maven.cli.MavenCli.main (MavenCli.java:192)     at sun.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)     at sun.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:62)     at sun.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43)     at java.lang.reflect.Method.invoke (Method.java:498)     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] [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/MojoExecutionException 

Adding the maven-compiler-plugin like suggested in this answer also does not work:

Fatal error compiling: invalid flag: --release -> [Help 1] 

Any ideas on how to fix this problem?

Answer 1

Same problem fixed for me by setting JAVA_HOME environment variable to point to the JDK with right version.

My source and destination java version in maven-compiler-plugin were 11, java -version was also on version 11, but my JAVA_HOME was pointing to JDK-1.8.

Check JAVA_HOME again by using a terminal instead of IDE:

Linux: echo $JAVA_HOME  Win: echo %JAVA_HOME% 

Then Build your project in the same terminal:

mvn clean package 

Answer 2

This worked for me:

<build>     <plugins>         <plugin>             <groupId>org.apache.maven.plugins</groupId>             <artifactId>maven-compiler-plugin</artifactId>             <version>3.7.0</version>             <configuration>                 <release>10</release>             </configuration>         </plugin>     </plugins> </build> 

This answer says you need:

<dependencies>     <dependency>         <groupId>org.ow2.asm</groupId>         <artifactId>asm</artifactId>         <version>6.2</version> <!-- Use newer version of ASM -->     </dependency> </dependencies> 

inside the <plugin/> tag, but the newer mvn (3.5.4) must obviate that, since I didn't need it.