maven build error: "invalid target release: 1.8"

[Cyprian Laskowski]

Hi, 

I'd like to customise our (clarin.si) WebAnno installation slightly. Before doing so, I've just tried "mvn clean install" immediately after git cloning (and thus no local changes yet). It fails at WebAnno - IO - TCF with the stacktrace below. Could you please help?

Cheers,

cyp

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.3:compile (default-compile) on project webanno-tcf: Fatal error compiling: invalid target release: 1.8 -> [Help 1]

org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.3:compile (default-compile) on project webanno-tcf: Fatal error compiling

at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:217)

at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)

at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)

at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:84)

at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:59)

at org.apache.maven.lifecycle.internal.LifecycleStarter.singleThreadedBuild(LifecycleStarter.java:183)

at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:161)

at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:320)

at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:156)

at org.apache.maven.cli.MavenCli.execute(MavenCli.java:537)

at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:196)

at org.apache.maven.cli.MavenCli.main(MavenCli.java:141)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

at java.lang.reflect.Method.invoke(Method.java:606)

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:836)

at org.apache.maven.plugin.compiler.CompilerMojo.execute(CompilerMojo.java:129)

at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:101)

at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:209)

... 19 more

Caused by: org.codehaus.plexus.compiler.CompilerException: invalid target release: 1.8

at org.codehaus.plexus.compiler.javac.JavaxToolsCompiler.compileInProcess(JavaxToolsCompiler.java:172)

at org.codehaus.plexus.compiler.javac.JavacCompiler.performCompile(JavacCompiler.java:169)

at org.apache.maven.plugin.compiler.AbstractCompilerMojo.execute(AbstractCompilerMojo.java:825)

... 22 more

Caused by: java.lang.IllegalArgumentException: invalid target release: 1.8

at com.sun.tools.javac.main.RecognizedOptions$GrumpyHelper.error(RecognizedOptions.java:88)

at com.sun.tools.javac.main.RecognizedOptions$10.process(RecognizedOptions.java:359)

at com.sun.tools.javac.api.JavacTool.processOptions(JavacTool.java:242)

at com.sun.tools.javac.api.JavacTool.getTask(JavacTool.java:199)

at com.sun.tools.javac.api.JavacTool.getTask(JavacTool.java:68)

at org.codehaus.plexus.compiler.javac.JavaxToolsCompiler.compileInProcess(JavaxToolsCompiler.java:123)

... 24 more

"mvn --version" gives this:

Apache Maven 3.0.5

Maven home: /usr/share/maven

Java version: 1.7.0_80, vendor: Oracle Corporation

Java home: /usr/lib/jvm/java-7-oracle/jre

Default locale: en_US, platform encoding: UTF-8

OS name: "linux", version: "3.16.0-46-generic", arch: "amd64", family: "unix"

[Richard Eckart de Castilho]

You appear to be building on a JDK < version 8. Install a Java 8 JDK and try again ;)

Cheers,

-- Richard

[Cyprian Laskowski]

You appear to be building on a JDK < version 8. Install a Java 8 JDK and try again ;)

Indeed, that did it, thanks!

Cheers, cyp