Issue with exec plugin - when using with Cobertura

[SoumenTrivedi]

Hello,
I am using -
Maven 2.0.9
exec-maven-plugin 1.1.1
cobertura-maven-plugin 2.1
Java version: 1.5.0_17
OS name: "linux" version: "2.6.18-128.el5pae" arch: "i386" Family: "unix"

When I am running cobertura:cobertura goal from the command line, I am getting the following error:

[INFO] ------------------------------------------------------------------------
[ERROR] BUILD ERROR
[INFO] ------------------------------------------------------------------------
[INFO] One or more required plugin parameters are invalid/missing for 'exec:exec'

[0] Inside the definition for plugin 'exec-maven-plugin' specify the following:

<configuration>
  ...
  <executable>VALUE</executable>
</configuration>

-OR-

on the command line, specify: '-Dexec.executable=VALUE'

[INFO] ------------------------------------------------------------------------
[DEBUG] Trace
org.apache.maven.lifecycle.LifecycleExecutionException: Error configuring: org.codehaus.mojo:exec-maven-plugin. Reason: Invalid or missing parameters: [Mojo parameter [name: 'executable'; alias: 'null']] for mojo: org.codehaus.mojo:exec-maven-plugin:1.1.1:exec
        at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:587)
        at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalWithLifecycle(DefaultLifecycleExecutor.java:499)
        at org.apache.maven.lifecycle.DefaultLifecycleExecutor.forkProjectLifecycle(DefaultLifecycleExecutor.java:924)
        at org.apache.maven.lifecycle.DefaultLifecycleExecutor.forkLifecycle(DefaultLifecycleExecutor.java:767)
        at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:529)
        at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeStandaloneGoal(DefaultLifecycleExecutor.java:512)
        at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(DefaultLifecycleExecutor.java:482)
        at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHandleFailures(DefaultLifecycleExecutor.java:330)
        at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments(DefaultLifecycleExecutor.java:291)
        at org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:142)
        at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:336)
        at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:129)
        at org.apache.maven.cli.MavenCli.main(MavenCli.java:287)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:585)
        at org.codehaus.classworlds.Launcher.launchEnhanced(Launcher.java:315)
        at org.codehaus.classworlds.Launcher.launch(Launcher.java:255)
        at org.codehaus.classworlds.Launcher.mainWithExitCode(Launcher.java:430)
        at org.codehaus.classworlds.Launcher.main(Launcher.java:375)
Caused by: org.apache.maven.plugin.PluginParameterException: Error configuring: org.codehaus.mojo:exec-maven-plugin. Reason: Invalid or missing parameters: [Mojo parameter [name: 'executable'; alias: 'null']] for mojo: org.codehaus.mojo:exec-maven-plugin:1.1.1:exec
        at org.apache.maven.plugin.DefaultPluginManager.checkRequiredParameters(DefaultPluginManager.java:1042)
        at org.apache.maven.plugin.DefaultPluginManager.getConfiguredMojo(DefaultPluginManager.java:659)
        at org.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPluginManager.java:429)
        at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:558)
        ... 20 more

I am running the following command at the root_dir, command line and getting the error mentioned above
mvn clean cobertura:cobertura -X

I have the following directory structure
<root dir> - packaging in pom.xml is pom
   - < sub dir 1> - contains source files and a pom.xml with packaging as Jar
   - < sub dir 2> - contains source files and a pom.xml with packaging as Jar
   - < sub dir 3>  - contains source files and a pom.xml with packaging as Jar


But When I run mvn clean exec:exec the build is successful and do not get any error

The pom.xml contains the entry as below

    <build>
        <plugins>

         <plugin>
            <inherited>false</inherited>
            <groupId>org.codehaus.mojo</groupId>
            <artifactId>exec-maven-plugin</artifactId>
            <executions>
               <execution>
                  <goals>
                     <goal>exec</goal>
                  </goals>
               </execution>
            </executions>
            <configuration>
               <executable>../java-service-wrapper/createJavaServiceWrapperConfig.sh</executable>
               <arguments>
                  <!-- Node home directory -->
                  <argument>/opt/metro/plato</argument>
                  <!-- Broker title  -->
                  <argument>PlatoBroker</argument>
                  <!-- Relative location of the Java Service Wrapper files -->
                  <argument>../java-service-wrapper</argument>
                      <!-- Architecture -->
                    <argument>32</argument>
                </arguments>

            </configuration>
         </plugin>

...
</build>


If the section in red above in pom.xml is removed, it works fine.

Please help me to resolve this issue!!

--
Thanks & Regards,
Soumen Trivedi
[phone]
Email: Soumen.Trivedi@...