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From "Brett Porter (JIRA)" <j...@codehaus.org>
Subject [jira] Closed: (MNG-2091) NPE when including middlegen-hibernate-plugin
Date Mon, 09 Apr 2007 00:30:46 GMT

     [ http://jira.codehaus.org/browse/MNG-2091?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Brett Porter closed MNG-2091.
-----------------------------

       Resolution: Duplicate
    Fix Version/s:     (was: 2.0.x)

> NPE when including middlegen-hibernate-plugin
> ---------------------------------------------
>
>                 Key: MNG-2091
>                 URL: http://jira.codehaus.org/browse/MNG-2091
>             Project: Maven 2
>          Issue Type: Bug
>          Components: Plugin API
>    Affects Versions: 2.2
>         Environment: SUSE Linux 9.3 on i386; JVM: 1.5.0_04-b05; Kernel: 2.6.11.4.20a-11-default
>            Reporter: Bernd Adamowicz
>
> As soon as the plugin middlegen-hibernat-plugin is integrated into the POM, a NPE is
thrown when the plugin is added. This is the stacktrace:
> bernd@linuxba:~/THEMEN/ECLIPSE_WORKBENCH/Buttenlauf> mvn compile
> [INFO] Scanning for projects...
> [INFO] ----------------------------------------------------------------------------
> [INFO] Building Buttenlauf Auswertung - GVC Criesbach
> [INFO]    task-segment: [compile]
> [INFO] ----------------------------------------------------------------------------
> [INFO] ----------------------------------------------------------------------------
> [ERROR] FATAL ERROR
> [INFO] ----------------------------------------------------------------------------
> [INFO] null
> [INFO] ----------------------------------------------------------------------------
> [INFO] Trace
> java.lang.NullPointerException
>         at org.apache.maven.plugin.DefaultPluginManager.addPlugin(DefaultPluginManager.java:295)
>         at org.apache.maven.plugin.DefaultPluginManager.verifyVersionedPlugin(DefaultPluginManager.java:200)
>         at org.apache.maven.plugin.DefaultPluginManager.verifyPlugin(DefaultPluginManager.java:165)
>         at org.apache.maven.lifecycle.DefaultLifecycleExecutor.verifyPlugin(DefaultLifecycleExecutor.java:1218)
>         at org.apache.maven.lifecycle.DefaultLifecycleExecutor.bindPluginToLifecycle(DefaultLifecycleExecutor.java:1182)
>         at org.apache.maven.lifecycle.DefaultLifecycleExecutor.constructLifecycleMappings(DefaultLifecycleExecutor.java:950)
>         at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(DefaultLifecycleExecutor.java:450)
>         at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHandleFailures(DefaultLifecycleExecutor.java:303)
>         at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments(DefaultLifecycleExecutor.java:270)
>         at org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:139)
>         at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:322)
>         at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:115)
>         at org.apache.maven.cli.MavenCli.main(MavenCli.java:249)
>         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)
> [INFO] ----------------------------------------------------------------------------
> [INFO] Total time: 2 seconds
> [INFO] Finished at: Mon Feb 20 21:04:30 CET 2006
> [INFO] Final Memory: 1M/4M
> [INFO] ----------------------------------------------------------------------------
> This is how the Middlegen-part of the POM looks like:
> ....
> <build>
> 		<plugins>
> 			<plugin>
> 				<groupId>middlegen</groupId>
> 				<artifactId>middlegen-hibernate-plugin</artifactId>
> 				<version>2.1</version>
> 			</plugin>
> 			<plugin>
> ....
> I know this issue has been around with Maven 1.x. The cause there was a corrupted plugin
pom from middlegen. But I wasn't able to reproduce this. I couldn't find anything wrong with
the pom.
> This problem can be reproduced with Maven 2.0 and on Windows systems, too. So I think
the problem really is the plugin.  I will open an issue on the Middlegen page, too and will
(hopefully) post a solution here. But maybe someone has a workaround to fix this in the meantime.
> Thanks in advance for any help.
> Bernd

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