Google App Engine JDO enhancement not working

I am trying to build my first version of Google App Engine WAR and set up my own external (outside of Eclipse) Ant construct to be executed from the terminal. I am trying to get an <enhance_war/>

Ant macro and I am running fancy NoSuchMethodError

.

Here's my Ant target:

<target name="package" depends="gendocs">
    <echo message="Enhancing WAR JDO classes." />
    <enhance_war war="war" />

    <echo message="Packaging the WAR file." />
    <war destfile="gen/dist/myapp.war" webxml="war/web.xml">
        <fileset dir="war">
            <includes name="**/*.xml" />
        </fileset>
        <lib dir="war/WEB-INF/lib" />
        <classes dir="war/WEB-INF/classes" />
    </war>
</target>

      

        
        
        
      

    

Here's the output from Ant when it tries to execute the target package

:

package:
     [echo] Enhancing WAR JDO classes.
  [enhance] Encountered a problem: Unexpected exception
  [enhance] Please see the logs [/tmp/enhance4426322586552955387.log] for further information.

BUILD FAILED
/home/myuser/sandbox/workbench/eclipse/workspace/myapp/build/build-local.xml:193: The following error occurred while executing this line:
/home/myuser/sandbox/workbench/google/gae-sdk/1.7.1/appengine-java-sdk-1.7.1/config/user/ant-macros.xml:95: Java returned: 1

      

        
        
        
      

    

Which ant-macros.xml:95

matches the following line:

<enhance failonerror="true" api="@{api}">
    <!-- Rest of the enhance task def -->
</enhance>

      

        
        
        
      

    

So, <enhance />

something is going wrong while doing this task , but I can't figure out what.

And finally, the log file in /tmp/enhance4426322586552955387.log

:

java.lang.RuntimeException: Unexpected exception
    at com.google.appengine.tools.enhancer.Enhancer.execute(Enhancer.java:76)
    at com.google.appengine.tools.enhancer.Enhance.<init>(Enhance.java:71)
    at com.google.appengine.tools.enhancer.Enhance.main(Enhance.java:51)
Caused by: java.lang.reflect.InvocationTargetException
    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:597)
    at com.google.appengine.tools.enhancer.Enhancer.execute(Enhancer.java:74)
    ... 2 more
Caused by: java.lang.NoSuchMethodError: org.datanucleus.plugin.PluginManager.<init>(Lorg/datanucleus/PersistenceConfiguration;Lorg/datanucleus/ClassLoaderResolver;)V
    at org.datanucleus.OMFContext.<init>(OMFContext.java:159)
    at org.datanucleus.enhancer.DataNucleusEnhancer.<init>(DataNucleusEnhancer.java:172)
    at org.datanucleus.enhancer.DataNucleusEnhancer.<init>(DataNucleusEnhancer.java:150)
    at org.datanucleus.enhancer.DataNucleusEnhancer.main(DataNucleusEnhancer.java:1157)
    ... 7 more

      

        
        
        
      

    

What's going on here? I don't think this is a classpath issue because the class org.datanucleus.plugin.PluginManager

is defined internally datanucleus-core-1.1.5.jar

, which I absolutely have in the assembly classpath . Plus its a NoSuchMethodError

, so I feel like I have a hellish JAR version / version problem. Any ideas?