Problem building Roo app with database: GOOGLE_APP_ENGINE

[cjansen]

Hey guys -

I tried building a Roo application (using 1.2.0.RELEASE) this weekend and set the jpa setup as follows:

jpa setup --database GOOGLE_APP_ENGINE --provider DATANUCLEUS

When I try to compile the application, I get the following error:


[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 3:18.016s
[INFO] Finished at: Mon Jan 30 07:52:07 EST 2012
[INFO] Final Memory: 9M/64M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.datanucleus:maven-datanucleus-plugin:3.0.1:enhance (default) on project firetrax: 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:/Z:/BlackSparx/springsource/jansenRepo/org/datanucleus/datanucleus-core/3.0.6/datanucleus-core-3.0.6.jar" is already registered, and you are trying to register an identical plugin located at URL "file:/Z:/BlackSparx/springsource/jansenRepo/org/datanucleus/datanucleus-core/3.0.4/datanucleus-core-3.0.4.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.

I've actually tried building the app on two separate machines and the issue is consistent. Anybody else encounter this?

[sunsus]

Hello cjansen

Have you found out any thing about this issue? Because I have the same Problem.

Regards

Patrick

[andy]

Why not investigate why you have datanucleus-core-3.0.4.jar somewhere, since the Maven plugin is pulling in the latest (datanucleus-core-3.0.6.jar) ... the message is clear enough - best to just use 3.0.6. Alternatively you configure your pom.xml to exclude the DataNucleus M2 plugin "datanucleus-core" dependency.

[sunsus]

So I can remove all this dependency which roo generates for me?

        <dependency>
            <groupId>org.datanucleus</groupId>
            <artifactId>datanucleus-core</artifactId>
            <version>3.0.4</version>
        </dependency>
        <dependency>
            <groupId>org.datanucleus</groupId>
            <artifactId>datanucleus-api-jpa</artifactId>
            <version>3.0.4</version>
        </dependency>
        <dependency>
            <groupId>org.datanucleus</groupId>
            <artifactId>datanucleus-rdbms</artifactId>
            <version>3.0.4</version>
        </dependency>

[cjansen]

I'll try to create modifying my pom as suggested and post what worked for me. Seems though that Roo should be handling this automagically...

[andy]

You can only *remove* those deps if you only use Maven for compiling/enhancing the classes. If you run your app using Maven then no you can't; you simply need to either exclude the datanucleus-core dependency from the DataNucleus M2 enhancer step, or change those deps to use the most recent DataNucleus release

[dankib01]

Changing datanucleus-core to 3.0.7 seems to work for me