Dependency resolution fails with an NPE for a provided dependency with a fixed
version
--------------------------------------------------------------------------------------
Key: MASSEMBLY-306
URL: http://jira.codehaus.org/browse/MASSEMBLY-306
Project: Maven 2.x Assembly Plugin
Issue Type: Bug
Affects Versions: 2.2-beta-2
Environment: Maven 2.0.8, Java 1.6.0_03-b05
Reporter: Thomas Dudziak
Priority: Critical
A POM like this:
<?xml version="1.0" encoding="UTF-8"?><project>
<modelVersion>4.0.0</modelVersion>
<groupId>maven-test</groupId>
<artifactId>maven-test</artifactId>
<name>maven-test</name>
<version>1.0-SNAPSHOT</version>
<url>http://maven.apache.org</url>
<dependencies>
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>[1.2.13]</version>
<scope>provided</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-assembly-plugin</artifactId>
<version>2.2-beta-2</version>
<configuration>
<descriptorRefs>
<descriptorRef>jar-with-dependencies</descriptorRef>
</descriptorRefs>
<archive>
<manifest>
<mainClass>ning.dashboard.DashboardServer</mainClass>
</manifest>
</archive>
</configuration>
<executions>
<execution>
<id>make-assembly</id>
<phase>package</phase>
<goals>
<goal>attached</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>
fails with this error:
[INFO] Processing DependencySet (output=)
[INFO] ------------------------------------------------------------------------
[ERROR] FATAL ERROR
[INFO] ------------------------------------------------------------------------
[INFO] version was null for log4j:log4j
[INFO] ------------------------------------------------------------------------
[INFO] Trace
java.lang.NullPointerException: version was null for log4j:log4j
at
org.apache.maven.artifact.DefaultArtifact.getBaseVersion(DefaultArtifact.java:362)
at
org.apache.maven.artifact.DefaultArtifact.getId(DefaultArtifact.java:225)
at
org.apache.maven.shared.artifact.filter.ScopeArtifactFilter.include(ScopeArtifactFilter.java:142)
at
org.apache.maven.project.artifact.MavenMetadataSource.createArtifacts(MavenMetadataSource.java:345)
at
org.apache.maven.plugin.assembly.artifact.DefaultDependencyResolver.resolveDependencies(DefaultDependencyResolver.java:123)
at
org.apache.maven.plugin.assembly.archive.task.AddDependencySetsTask.resolveDependencyArtifacts(AddDependencySetsTask.java:205)
at
org.apache.maven.plugin.assembly.archive.task.AddDependencySetsTask.addDependencySet(AddDependencySetsTask.java:132)
at
org.apache.maven.plugin.assembly.archive.task.AddDependencySetsTask.execute(AddDependencySetsTask.java:116)
at
org.apache.maven.plugin.assembly.archive.phase.DependencySetAssemblyPhase.execute(DependencySetAssemblyPhase.java:74)
at
org.apache.maven.plugin.assembly.archive.DefaultAssemblyArchiver.createArchive(DefaultAssemblyArchiver.java:129)
at
org.apache.maven.plugin.assembly.mojos.AbstractAssemblyMojo.execute(AbstractAssemblyMojo.java:322)
at
org.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPluginManager.java:447)
at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:539)
at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalWithLifecycle(DefaultLifecycleExecutor.java:480)
at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(DefaultLifecycleExecutor.java:459)
at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHandleFailures(DefaultLifecycleExecutor.java:311)
at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments(DefaultLifecycleExecutor.java:278)
at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:143)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:333)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:126)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:282)
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)
As far as I can see in the code, the problem is twofold:
* the DefaultArtifact does not set a recommended version even though there is a
single version for the artifact (the version is not only recommended but forced)
* the assembly plugin does not handle the forced version properly
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