Question

I have an ant build file that works when invoked by itself. When I invoke it from maven, the first few tasks execute fine (init, clean, etc.), but build fails with:

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-antrun-plugin:1.7:run (compile) on project maven-stream: An Ant BuildException has occur
ed: The following error occurred while executing this line:
[ERROR] C:\maven_projects\cm\Qlarius Underwriter\build.xml:24: Unable to find a javac compiler;
[ERROR] com.sun.tools.javac.Main is not on the classpath.
[ERROR] Perhaps JAVA_HOME does not point to the JDK.
[ERROR] It is currently set to "C:\Program Files\Java\jdk1.7.0_07\jre"
[ERROR] around Ant part ...<ant antfile="C:\maven_projects\cm/Qlarius Underwriter/build.xml">... @ 4:69 in C:\maven_projects\cm\target\antrun\build-ma
in.xml

Why would ant find java when invoked directly but not through maven?

The ant portion of the pom.xml file is:

<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-antrun-plugin</artifactId>
    <version>1.7</version>
    <executions>
      <execution>
        <id>compile</id>
        <phase>compile</phase>
        <configuration>
          <target>
            <ant antfile="${basedir}/Qlarius Underwriter/build.xml">
              <target name="LifeQuote"/>
            </ant>
          </target>
        </configuration>
        <goals>
          <goal>run</goal>
        </goals>
      </execution>
    </executions>
</plugin>

Answer 1

As the error suggests you’re not pointing to a JDK. You need to change JAVA_HOME to be the root of your JDK and not the JRE. That way it will be able to find javac.

The other tasks init and clean will probably be ok if they are not using javac