Changing multimodule.roo sample to JPA provider DataNucleus causes build failure

If you take the multimodule.roo sample found with 1.2.1.RELEASE and change the JPA provider to DataNucleus, enhancement fails:

[email protected]:~/temp$ cd core
[email protected]:~/temp/core$ mvn clean install
[INFO] Scanning for projects...
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building core 0.1.0.BUILD-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] — maven-clean-plugin:2.4.1:clean (default-clean) @ core —
[INFO] Deleting /home/matthew/temp/core/target
[INFO]
[INFO] — aspectj-maven-plugin:1.2:compile (default) @ core —
[WARNING] advice defined in org.springframework.mock.staticmock.AnnotationDrivenStaticEntityMockingControl has not been applied [Xlint:adviceDidNotMatch]
[WARNING] advice defined in org.springframework.mock.staticmock.AbstractMethodMockingControl has not been applied [Xlint:adviceDidNotMatch]
[WARNING] advice defined in org.springframework.scheduling.aspectj.AbstractAsyncExecutionAspect has not been applied [Xlint:adviceDidNotMatch]
[INFO]
[INFO] — maven-resources-plugin:2.5:resources (default-resources) @ core —
[debug] execute contextualize
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] Copying 2 resources
[INFO]
[INFO] — maven-compiler-plugin:2.3.2:compile (default-compile) @ core —
[INFO] Nothing to compile - all classes are up to date
[INFO]
[INFO] — maven-datanucleus-plugin:3.0.1:enhance (default) @ core —
[WARNING] Could not transfer metadata asm:asm/maven-metadata.xml from/to local.repository (file:../../local.repository/trunk): No connector available to access repository local.repository (file:../../local.repository/trunk) of type legacy using the available factories WagonRepositoryConnectorFactory
[INFO] CP: /home/matthew/.m2/repository/org/datanucleus/maven-datanucleus-plugin/3.0.1/maven-datanucleus-plugin-3.0.1.jar
[INFO] CP: /home/matthew/.m2/repository/org/datanucleus/datanucleus-core/3.1.0-m1/datanucleus-core-3.1.0-m1.jar
[INFO] CP: /home/matthew/.m2/repository/org/datanucleus/datanucleus-enhancer/3.0.1/datanucleus-enhancer-3.0.1.jar
[INFO] CP: /home/matthew/.m2/repository/javax/jdo/jdo-api/3.1-SNAPSHOT-20110926/jdo-api-3.1-SNAPSHOT-20110926.jar
[INFO] CP: /home/matthew/.m2/repository/javax/transaction/transaction-api/1.1/transaction-api-1.1.jar
[INFO] CP: /home/matthew/.m2/repository/org/apache/geronimo/specs/geronimo-jpa_2.0_spec/1.0/geronimo-jpa_2.0_spec-1.0.jar
[INFO] CP: /home/matthew/.m2/repository/asm/asm/3.3.1/asm-3.3.1.jar
[INFO] CP: /home/matthew/.m2/repository/org/codehaus/plexus/plexus-utils/1.2/plexus-utils-1.2.jar
[INFO] CP: /home/matthew/.m2/repository/junit/junit/3.8.1/junit-3.8.1.jar
[INFO] CP: /home/matthew/temp/core/target/classes
[INFO] CP: /home/matthew/.m2/repository/log4j/log4j/1.2.16/log4j-1.2.16.jar
[INFO] CP: /home/matthew/.m2/repository/org/slf4j/slf4j-api/1.6.4/slf4j-api-1.6.4.jar
[INFO] CP: /home/matthew/.m2/repository/org/slf4j/jcl-over-slf4j/1.6.4/jcl-over-slf4j-1.6.4.jar
[INFO] CP: /home/matthew/.m2/repository/org/slf4j/slf4j-log4j12/1.6.4/slf4j-log4j12-1.6.4.jar
[INFO] CP: /home/matthew/.m2/repository/org/aspectj/aspectjrt/1.6.12/aspectjrt-1.6.12.jar
[INFO] CP: /home/matthew/.m2/repository/org/aspectj/aspectjweaver/1.6.12/aspectjweaver-1.6.12.jar
[INFO] CP: /home/matthew/.m2/repository/javax/servlet/servlet-api/2.5/servlet-api-2.5.jar
[INFO] CP: /home/matthew/.m2/repository/net/sf/flexjson/flexjson/2.1/flexjson-2.1.jar
[INFO] CP: /home/matthew/.m2/repository/org/apache/commons/commons-lang3/3.1/commons-lang3-3.1.jar
[INFO] CP: /home/matthew/.m2/repository/org/springframework/roo/org.springframework.roo.annotations/1.2.1.RELEASE/org.springframework.roo.annotations-1.2.1.RELEASE.jar
[INFO] CP: /home/matthew/.m2/repository/commons-io/commons-io/2.1/commons-io-2.1.jar
[INFO] CP: /home/matthew/.m2/repository/commons-codec/commons-codec/1.6/commons-codec-1.6.jar
[INFO] CP: /home/matthew/.m2/repository/org/springframework/spring-core/3.1.0.RELEASE/spring-core-3.1.0.RELEASE.jar
[INFO] CP: /home/matthew/.m2/repository/org/springframework/spring-asm/3.1.0.RELEASE/spring-asm-3.1.0.RELEASE.jar
[INFO] CP: /home/matthew/.m2/repository/org/springframework/spring-context/3.1.0.RELEASE/spring-context-3.1.0.RELEASE.jar
[INFO] CP: /home/matthew/.m2/repository/org/springframework/spring-beans/3.1.0.RELEASE/spring-beans-3.1.0.RELEASE.jar
[INFO] CP: /home/matthew/.m2/repository/org/springframework/spring-expression/3.1.0.RELEASE/spring-expression-3.1.0.RELEASE.jar
[INFO] CP: /home/matthew/.m2/repository/org/springframework/spring-aop/3.1.0.RELEASE/spring-aop-3.1.0.RELEASE.jar
[INFO] CP: /home/matthew/.m2/repository/aopalliance/aopalliance/1.0/aopalliance-1.0.jar
[INFO] CP: /home/matthew/.m2/repository/org/springframework/spring-aspects/3.1.0.RELEASE/spring-aspects-3.1.0.RELEASE.jar
[INFO] CP: /home/matthew/.m2/repository/org/springframework/spring-context-support/3.1.0.RELEASE/spring-context-support-3.1.0.RELEASE.jar
[INFO] CP: /home/matthew/.m2/repository/org/hsqldb/hsqldb/1.8.0.10/hsqldb-1.8.0.10.jar
[INFO] CP: /home/matthew/.m2/repository/org/hibernate/hibernate-validator/4.2.0.Final/hibernate-validator-4.2.0.Final.jar
[INFO] CP: /home/matthew/.m2/repository/javax/validation/validation-api/1.0.0.GA/validation-api-1.0.0.GA.jar
[INFO] CP: /home/matthew/.m2/repository/cglib/cglib-nodep/2.2.2/cglib-nodep-2.2.2.jar
[INFO] CP: /home/matthew/.m2/repository/javax/transaction/jta/1.1/jta-1.1.jar
[INFO] CP: /home/matthew/.m2/repository/org/springframework/spring-jdbc/3.1.0.RELEASE/spring-jdbc-3.1.0.RELEASE.jar
[INFO] CP: /home/matthew/.m2/repository/org/springframework/spring-tx/3.1.0.RELEASE/spring-tx-3.1.0.RELEASE.jar
[INFO] CP: /home/matthew/.m2/repository/org/springframework/spring-orm/3.1.0.RELEASE/spring-orm-3.1.0.RELEASE.jar
[INFO] CP: /home/matthew/.m2/repository/commons-pool/commons-pool/1.5.6/commons-pool-1.5.6.jar
[INFO] CP: /home/matthew/.m2/repository/commons-dbcp/commons-dbcp/1.3/commons-dbcp-1.3.jar
[INFO] CP: /home/matthew/.m2/repository/org/datanucleus/datanucleus-core/3.0.7/datanucleus-core-3.0.7.jar
[INFO] CP: /home/matthew/.m2/repository/org/datanucleus/datanucleus-api-jpa/3.0.6/datanucleus-api-jpa-3.0.6.jar
[INFO] CP: /home/matthew/.m2/repository/org/datanucleus/datanucleus-rdbms/3.0.6/datanucleus-rdbms-3.0.6.jar
log4j:ERROR Could not read configuration file from URL file:/home/matthew/temp/core/src/main/resources/log4j.properties.
java.io.FileNotFoundException: /home/matthew/temp/core/src/main/resources/log4j.properties (No such file or directory)
at java.io.FileInputStream.open(Native Method)
at java.io.FileInputStream.<init>(FileInputStream.java:120)
at java.io.FileInputStream.<init>(FileInputStream.java:79)
at sun.net.www.protocol.file.FileURLConnection.connect(FileURLConnection.java:70)
at sun.net.www.protocol.file.FileURLConnection.getInputStream(FileURLConnection.java:161)
at org.apache.log4j.PropertyConfigurator.doConfigure(PropertyConfigurator.java:524)
at org.apache.log4j.helpers.OptionConverter.selectAndConfigure(OptionConverter.java:483)
at org.apache.log4j.LogManager.<clinit>(LogManager.java:127)
at org.apache.log4j.Logger.getLogger(Logger.java:104)
at org.datanucleus.util.Log4JLogger.<init>(Log4JLogger.java:49)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
at org.datanucleus.util.NucleusLogger.getLoggerInstance(NucleusLogger.java:140)
at org.datanucleus.util.NucleusLogger.<clinit>(NucleusLogger.java:106)
at org.datanucleus.enhancer.DataNucleusEnhancer.<clinit>(DataNucleusEnhancer.java:86)
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 org.datanucleus.maven.AbstractDataNucleusMojo.executeInJvm(AbstractDataNucleusMojo.java:333)
at org.datanucleus.maven.AbstractEnhancerMojo.enhance(AbstractEnhancerMojo.java:249)
at org.datanucleus.maven.AbstractEnhancerMojo.executeDataNucleusTool(AbstractEnhancerMojo.java:72)
at org.datanucleus.maven.AbstractDataNucleusMojo.execute(AbstractDataNucleusMojo.java:126)
at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:101)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:209)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:84)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:59)
at org.apache.maven.lifecycle.internal.LifecycleStarter.singleThreadedBuild(LifecycleStarter.java:183)
at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:161)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:319)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:156)
at org.apache.maven.cli.MavenCli.execute(MavenCli.java:537)
at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:196)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:141)
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 org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:290)
at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:230)
at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:409)
at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:352)
log4j:ERROR Ignoring configuration file file:/home/matthew/temp/core/src/main/resources/log4j.properties.
log4j:WARN No appenders could be found for logger (DataNucleus.Enhancer).
log4j:WARN Please initialize the log4j system properly.
log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 3.217s
[INFO] Finished at: Sat Mar 10 15:10:16 CST 2012
[INFO] Final Memory: 9M/169M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.datanucleus:maven-datanucleus-plugin:3.0.1:enhance (default) on project core: Error executing enhancer: InvocationTargetException: Plugin (Bundle) "org.datanucleus" is already registered. Ensure you dont have multiple JAR versions of the same plugin in the classpath. The URL "file:/home/matthew/.m2/repository/org/datanucleus/datanucleus-core/3.0.7/datanucleus-core-3.0.7.jar" is already registered, and you are trying to register an identical plugin located at URL "file:/home/matthew/.m2/repository/org/datanucleus/datanucleus-core/3.1.0-m1/datanucleus-core-3.1.0-m1.jar." -> [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
[email protected]:~/temp/core$