I&#39;m trying to run `exec-maven-plugin`&#39;s `exec:java` goal on a simple two-module project where one module depends on the other. So far I can&#39;t find a configuration that works. Here&#39;s a boiled-down test case:

```
+ exec-multi-module-test/
    + pom.xml
    + module1/
        + pom.xml
        + src/
            + main/
                + java/
                    + HelloPrinter.java
    + module2/
        + pom.xml
        + src/
            + main/
                + java/
                    + MyMain.java
```

Here&#39;s the parent pom:


    &lt;?xml version=&quot;1.0&quot; encoding=&quot;UTF-8&quot;?&gt;
    &lt;project xmlns=&quot;http://maven.apache.org/POM/4.0.0&quot;
             xmlns:xsi=&quot;http://www.w3.org/2001/XMLSchema-instance&quot;
             xsi:schemaLocation=&quot;http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd&quot;&gt;
        &lt;modelVersion&gt;4.0.0&lt;/modelVersion&gt;

        &lt;groupId&gt;com.mkscrg.sandbox&lt;/groupId&gt;
        &lt;artifactId&gt;exec-multi-module-test&lt;/artifactId&gt;
        &lt;version&gt;1.0&lt;/version&gt;
        &lt;packaging&gt;pom&lt;/packaging&gt;

        &lt;modules&gt;
            &lt;module&gt;module1&lt;/module&gt;
            &lt;module&gt;module2&lt;/module&gt;
        &lt;/modules&gt;

        &lt;build&gt;
            &lt;plugins&gt;
                &lt;plugin&gt;
                    &lt;groupId&gt;org.codehaus.mojo&lt;/groupId&gt;
                    &lt;artifactId&gt;exec-maven-plugin&lt;/artifactId&gt;
                    &lt;version&gt;1.2.1&lt;/version&gt;
                &lt;/plugin&gt;
            &lt;/plugins&gt;
        &lt;/build&gt;
    &lt;/project&gt;

`module1`&#39;s pom:

    &lt;?xml version=&quot;1.0&quot; encoding=&quot;UTF-8&quot;?&gt;
    &lt;project xmlns=&quot;http://maven.apache.org/POM/4.0.0&quot;
             xmlns:xsi=&quot;http://www.w3.org/2001/XMLSchema-instance&quot;
             xsi:schemaLocation=&quot;http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd&quot;&gt;
        &lt;modelVersion&gt;4.0.0&lt;/modelVersion&gt;

        &lt;parent&gt;
            &lt;artifactId&gt;exec-multi-module-test&lt;/artifactId&gt;
            &lt;groupId&gt;com.mkscrg.sandbox&lt;/groupId&gt;
            &lt;version&gt;1.0&lt;/version&gt;
        &lt;/parent&gt;

        &lt;artifactId&gt;module1&lt;/artifactId&gt;
    &lt;/project&gt;

`module2`&#39;s pom:
    &lt;?xml version=&quot;1.0&quot; encoding=&quot;UTF-8&quot;?&gt;
    &lt;project xmlns=&quot;http://maven.apache.org/POM/4.0.0&quot;
             xmlns:xsi=&quot;http://www.w3.org/2001/XMLSchema-instance&quot;
             xsi:schemaLocation=&quot;http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd&quot;&gt;
        &lt;modelVersion&gt;4.0.0&lt;/modelVersion&gt;

        &lt;parent&gt;
            &lt;artifactId&gt;exec-multi-module-test&lt;/artifactId&gt;
            &lt;groupId&gt;com.mkscrg.sandbox&lt;/groupId&gt;
            &lt;version&gt;1.0&lt;/version&gt;
        &lt;/parent&gt;

        &lt;artifactId&gt;module2&lt;/artifactId&gt;

        &lt;dependencies&gt;
            &lt;dependency&gt;
                &lt;groupId&gt;com.mkscrg.sandbox&lt;/groupId&gt;
                &lt;artifactId&gt;module1&lt;/artifactId&gt;
                &lt;version&gt;${project.version}&lt;/version&gt;
            &lt;/dependency&gt;
        &lt;/dependencies&gt;
    &lt;/project&gt;

This project compiles successfully from the top, but running `mvn exec:java -Dexec.mainClass=myMain` fails:

    [INFO] Scanning for projects...
    [INFO] ------------------------------------------------------------------------
    [INFO] Reactor Build Order:
    [INFO] 
    [INFO] exec-multi-module-test
    [INFO] module1
    [INFO] module2
    [INFO]                                                                         
    [INFO] ------------------------------------------------------------------------
    [INFO] Building exec-multi-module-test 1.0
    [INFO] ------------------------------------------------------------------------
    [INFO] 
    [INFO] &gt;&gt;&gt; exec-maven-plugin:1.2.1:java (default-cli) @ exec-multi-module-test &gt;&gt;&gt;
    [INFO] 
    [INFO] &lt;&lt;&lt; exec-maven-plugin:1.2.1:java (default-cli) @ exec-multi-module-test &lt;&lt;&lt;
    [INFO] 
    [INFO] --- exec-maven-plugin:1.2.1:java (default-cli) @ exec-multi-module-test ---
    [WARNING] 
    java.lang.ClassNotFoundException: MyMain
            at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
            at java.security.AccessController.doPrivileged(Native Method)
            at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
            at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
            at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
            at org.codehaus.mojo.exec.ExecJavaMojo$1.run(ExecJavaMojo.java:285)
            at java.lang.Thread.run(Thread.java:680)
    [INFO] ------------------------------------------------------------------------
    [INFO] Reactor Summary:
    [INFO] 
    [INFO] exec-multi-module-test ............................ FAILURE [0.363s]
    [INFO] module1 ........................................... SKIPPED
    [INFO] module2 ........................................... SKIPPED
    [INFO] ------------------------------------------------------------------------
    [INFO] BUILD FAILURE
    [INFO] ------------------------------------------------------------------------
    [INFO] Total time: 0.566s
    [INFO] Finished at: Mon Jun 18 14:11:54 PDT 2012
    [INFO] Final Memory: 3M/81M
    [INFO] ------------------------------------------------------------------------
    [ERROR] Failed to execute goal org.codehaus.mojo:exec-maven-plugin:1.2.1:java (default-cli) on project exec-multi-module-test: An exception occured while executing the Java class. MyMain -&gt; [Help 1]
    [ERROR] 
    [ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
    [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/MojoExecutionException

What&#39;s the right way to configure this project to allow `exec:java` to see `MyMain`?

EDIT: Here&#39;s a gist if you&#39;d like to try this yourself: https://gist.github.com/2950830

EDIT: Clarification: I know it&#39;s possible to `mvn install` and then either run `exec:java` from `module2`&#39;s directory or use the `-pl` flag from the top. However, I&#39;d like to avoid running `mvn install`. It shouldn&#39;t be necessary to modify my local repository in order to run this goal in a multi-module project. Just as `mvn compile` &quot;just works&quot; with a multi-module project, so should other goals/phases.

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Maven exec:java goal on a multi-module project