I am new to Maven, so please bear with me if the solution to my problem seems simple.
I have created a simpel test project using the following pom.xml: *********************** <project xmlns="http://maven.apache.org/POM/4.0.0"; xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"; xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd";> <modelVersion>4.0.0</modelVersion> <artifactId>test</artifactId> <groupId>dk.lpk.jfuturama</groupId> <version>1.0-SNAPSHOT</version> <packaging>jar</packaging> <name>test</name> </project> *********************** The module contains only one java-file in the path \src\main\java\dk\lpk\jfuturama\App.test: *********************** package dk.lpk.jfuturama; public interface App { double f(final double x); } *********************** When I invoke Maven 2 (v 2.2.1), I get the following message: C:\development\src\JFuturama\branches\head\modules\test>mvn package -e + Error stacktraces are turned on. [INFO] Scanning for projects... [INFO] ------------------------------------------------------------------------ [INFO] Building test [INFO] task-segment: [package] [INFO] ------------------------------------------------------------------------ [INFO] ------------------------------------------------------------------------ [ERROR] BUILD ERROR [INFO] ------------------------------------------------------------------------ [INFO] Error building POM (may not be this project's POM). Project ID: unknown:maven-resources-plugin Reason: Parent: org.apache.maven.plugins:maven-plugins:xml:12 of project: unknown:maven-resources-plugin has wrong packaging: xml. Must be 'pom'. for project unknown:maven-resources-plugin [INFO] ------------------------------------------------------------------------ [INFO] Trace org.apache.maven.lifecycle.LifecycleExecutionException: Unable to build project for plugin 'org.apache.maven.plugins:maven-resources-plugin': Parent: org.apache.maven.plugins:maven-plugins:xml:12 of project: unknown:maven-resources-plugin has wrong packaging: xml. Must be 'pom'. for project unknown:maven-resources-plugin at org.apache.maven.lifecycle.DefaultLifecycleExecutor.verifyPlugin(DefaultLifecycleExecutor.java:1557) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.getMojoDescriptor(DefaultLifecycleExecutor.java:1851) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.bindLifecycleForPackaging(DefaultLifecycleExecutor.java:1311) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.constructLifecycleMappings(DefaultLifecycleExecutor.java:1275) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(DefaultLifecycleExecutor.java:534) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHandleFailures(DefaultLifecycleExecutor.java:387) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments(DefaultLifecycleExecutor.java:348) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:180) at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:328) at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:138) at org.apache.maven.cli.MavenCli.main(MavenCli.java:362) at org.apache.maven.cli.compat.CompatibleMain.main(CompatibleMain.java:60) 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.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) Caused by: org.apache.maven.plugin.InvalidPluginException: Unable to build project for plugin 'org.apache.maven.plugins:maven-resources-plugin': Parent: org.apache.maven.plugins:maven-plugins:xml:12 of project: unknown:maven-resources-plugin has wrong packaging: xml. Must be 'pom'. for project unknown:maven-resources-plugin at org.apache.maven.plugin.DefaultPluginManager.checkRequiredMavenVersion(DefaultPluginManager.java:293) at org.apache.maven.plugin.DefaultPluginManager.verifyVersionedPlugin(DefaultPluginManager.java:205) at org.apache.maven.plugin.DefaultPluginManager.verifyPlugin(DefaultPluginManager.java:184) at org.apache.maven.plugin.DefaultPluginManager.loadPluginDescriptor(DefaultPluginManager.java:1642) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.verifyPlugin(DefaultLifecycleExecutor.java:1540) ... 19 more Caused by: org.apache.maven.project.ProjectBuildingException: Parent: org.apache.maven.plugins:maven-plugins:xml:12 of project: unknown:maven-resources-plugin has wrong packaging: xml. Must be 'pom'. for project unknown:maven-resources-plugin at org.apache.maven.project.DefaultMavenProjectBuilder.assembleLineage(DefaultMavenProjectBuilder.java:1403) at org.apache.maven.project.DefaultMavenProjectBuilder.buildInternal(DefaultMavenProjectBuilder.java:823) at org.apache.maven.project.DefaultMavenProjectBuilder.buildFromRepository(DefaultMavenProjectBuilder.java:255) at org.apache.maven.plugin.DefaultPluginManager.checkRequiredMavenVersion(DefaultPluginManager.java:277) ... 23 more [INFO] ------------------------------------------------------------------------ [INFO] Total time: < 1 second [INFO] Finished at: Mon May 31 09:57:16 CEST 2010 [INFO] Final Memory: 1M/15M [INFO] ------------------------------------------------------------------------ C:\development\src\JFuturama\branches\head\modules\test> Maybe I should point out that I, due to firewall restrictions, is required to use an in house remote repository. For the time being I have Artifactory installed om my own computer. Help in understanding why the error and solving the problem would be much appreciated. Best regards Kenneth Petersen
