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https://issues.apache.org/jira/browse/FLINK-1610?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14336993#comment-14336993
 ] 

Stephan Ewen commented on FLINK-1610:
-------------------------------------

May be related to referring to Scala classes (and objects) from Java. Some 
tools have hickups there, due to the fact that the Scala class file names are 
not like the class name in the code (objects for example append a `$`)

> Java docs do not build
> ----------------------
>
>                 Key: FLINK-1610
>                 URL: https://issues.apache.org/jira/browse/FLINK-1610
>             Project: Flink
>          Issue Type: Bug
>          Components: Build System, Documentation
>    Affects Versions: 0.9
>            Reporter: Max Michels
>             Fix For: 0.9
>
>
> Among a bunch of warnings, I get the following error which prevents the java 
> doc generation from finishing:
> {code}
> javadoc: error - 
> com.sun.tools.doclets.internal.toolkit.util.DocletAbortException: 
> com.sun.tools.javac.code.Symbol$CompletionFailure: class file for 
> akka.testkit.TestKit not found
> Command line was: 
> /System/Library/Frameworks/JavaVM.framework/Versions/CurrentJDK/Home/bin/javadoc
>  -Xdoclint:none @options @packages
>       at 
> org.apache.maven.plugin.javadoc.AbstractJavadocMojo.executeJavadocCommandLine(AbstractJavadocMojo.java:5074)
>       at 
> org.apache.maven.plugin.javadoc.AbstractJavadocMojo.executeReport(AbstractJavadocMojo.java:1999)
>       at 
> org.apache.maven.plugin.javadoc.JavadocReport.generate(JavadocReport.java:130)
>       at 
> org.apache.maven.plugin.javadoc.JavadocReport.execute(JavadocReport.java:315)
>       at 
> org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:132)
>       at 
> org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:208)
>       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:116)
>       at 
> org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:80)
>       at 
> org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build(SingleThreadedBuilder.java:51)
>       at 
> org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:120)
>       at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:355)
>       at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:155)
>       at org.apache.maven.cli.MavenCli.execute(MavenCli.java:584)
>       at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:216)
>       at org.apache.maven.cli.MavenCli.main(MavenCli.java:160)
>       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:483)
>       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)
> {code}



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