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https://issues.apache.org/jira/browse/MCOMPILER-567?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17798703#comment-17798703
 ] 

Jeremy Norris commented on MCOMPILER-567:
-----------------------------------------

Hi Jorge,

Ok, I think I finally figured out a what reproduces it: make sure you have an 
empty `src/test/java` directory (but making sure you have one or more Java 
files to compile under `src/main/java` and then use the following pom:
{noformat}
<?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>foo</groupId>
  <artifactId>bar</artifactId>
  <version>1.0.0-SNAPSHOT</version>
  <packaging>jar</packaging>
  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
  </properties>
  <build>
    <plugins>
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-compiler-plugin</artifactId>
        <version>3.12.0</version>
      </plugin>
    </plugins>
  </build>
</project>
{noformat}

Thanks,
Jeremy

> Fail to compile if the "generated-sources/annotations" does not exist
> ---------------------------------------------------------------------
>
>                 Key: MCOMPILER-567
>                 URL: https://issues.apache.org/jira/browse/MCOMPILER-567
>             Project: Maven Compiler Plugin
>          Issue Type: Bug
>    Affects Versions: 3.12.0
>            Reporter: Jorge Solórzano
>            Assignee: Slawomir Jaranowski
>            Priority: Critical
>              Labels: pull-request-available
>             Fix For: next-release
>
>
> On some configurations (like a Kotlin project), the cleanup of the 
> generated-soruces/annotations directory returns an error:
> {code:java}
> Caused by: java.lang.IllegalStateException: basedir 
> /maven-compiler-plugin/target/it/MCOMPILER-XX/target/generated-sources/annotations
>  does not exist
>     at org.codehaus.plexus.util.DirectoryScanner.scan 
> (DirectoryScanner.java:268)
>     at 
> org.codehaus.plexus.compiler.AbstractCompiler.getSourceFilesForSourceRoot 
> (AbstractCompiler.java:168)
>     at org.codehaus.plexus.compiler.AbstractCompiler.getSourceFiles 
> (AbstractCompiler.java:194)
>     at org.codehaus.plexus.compiler.javac.JavacCompiler.performCompile 
> (JavacCompiler.java:138)
>     at org.apache.maven.plugin.compiler.AbstractCompilerMojo.execute 
> (AbstractCompilerMojo.java:1187)
>     at org.apache.maven.plugin.compiler.CompilerMojo.execute 
> (CompilerMojo.java:212)
>     at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo 
> (DefaultBuildPluginManager.java:126)
>     at org.apache.maven.lifecycle.internal.MojoExecutor.doExecute2 
> (MojoExecutor.java:328)
>     at org.apache.maven.lifecycle.internal.MojoExecutor.doExecute 
> (MojoExecutor.java:316)
>     at org.apache.maven.lifecycle.internal.MojoExecutor.execute 
> (MojoExecutor.java:212)
>     at org.apache.maven.lifecycle.internal.MojoExecutor.execute 
> (MojoExecutor.java:174)
>     at org.apache.maven.lifecycle.internal.MojoExecutor.access$000 
> (MojoExecutor.java:75)
>     at org.apache.maven.lifecycle.internal.MojoExecutor$1.run 
> (MojoExecutor.java:162)
>     at org.apache.maven.plugin.DefaultMojosExecutionStrategy.execute 
> (DefaultMojosExecutionStrategy.java:39)
>     at org.apache.maven.lifecycle.internal.MojoExecutor.execute 
> (MojoExecutor.java:159)
>     at 
> org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject 
> (LifecycleModuleBuilder.java:105)
>     at 
> org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject 
> (LifecycleModuleBuilder.java:73)
>     at 
> org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build
>  (SingleThreadedBuilder.java:53)
>     at org.apache.maven.lifecycle.internal.LifecycleStarter.execute 
> (LifecycleStarter.java:118)
>     at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:261)
>     at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:173)
>     at org.apache.maven.DefaultMaven.execute (DefaultMaven.java:101)
>     at org.apache.maven.cli.MavenCli.execute (MavenCli.java:906)
>     at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:283)
>     at org.apache.maven.cli.MavenCli.main (MavenCli.java:206)
>     at jdk.internal.reflect.DirectMethodHandleAccessor.invoke 
> (DirectMethodHandleAccessor.java:103)
>     at java.lang.reflect.Method.invoke (Method.java:580)
>     at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced 
> (Launcher.java:283)
>     at org.codehaus.plexus.classworlds.launcher.Launcher.launch 
> (Launcher.java:226)
>     at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode 
> (Launcher.java:407)
>     at org.codehaus.plexus.classworlds.launcher.Launcher.main 
> (Launcher.java:348){code}
>  
> I didn't catch this earlier since I don't use Kotlin and on a normal project, 
> this should not be an issue since the javac documentation mentions that the 
> directory, and any necessary subdirectories, will be created if they do not 
> already exist.
> But on a somewhat modified project that compiles kotlin source code, this 
> triggers an issue on plexus-compiler where the generated-soruces directory 
> does not exist.
>  
> This might be related to issue MCOMPILER-538, where it claims that generated 
> source root is not required for javac, but additional confirmation is 
> required.
>  
> The fix will be to create the generated sources directory to preserve the 
> current behavior.



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