[KARAF-4011] karaf-maven-plugin:features-add-to-repository NPE with blueprint:file: URL

• Type: Bug
• Status: Resolved
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 4.0.2
• Fix Version/s: 4.0.3
• Component/s: karaf

Environment

Linux 2.6.32-504.23.4.el6.x86_64 #1 SMP GNU/Linux
java version "1.8.0_60"
Java(TM) SE Runtime Environment (build 1.8.0_60-b27)
Java HotSpot(TM) 64-Bit Server VM (build 25.60-b23, mixed mode)
Apache Maven 3.3.3 (7994120775791599e205a5524ec3e0dfe41d4a06; 2015-04-22T07:57:37-04:00)
Maven home: /opt/maven/default
Java version: 1.8.0_60, vendor: Oracle Corporation
Default locale: en_US, platform encoding: UTF-8
OS name: "linux", version: "2.6.32-504.23.4.el6.x86_64", arch: "amd64", family: "unix"

• Assignee: Freeman Yue Fang
• Reporter: John Ellinwood
• Created: 23/Sep/15 22:47
• Updated: 16/Sep/18 04:35
• Resolved: 20/Oct/15 06:35

Description

When using the karaf-maven-plugin version 4.0.2-SNAPSHOT with the features-add-to-repository goal, I get an NPE when a feature has a protocol of blueprint:file:

stackTrace

[ERROR] Failed to execute goal org.apache.karaf.tooling:karaf-maven-plugin:4.0.2-SNAPSHOT:features-add-to-repository (features-add-to-repository) on project myproject: Execution features-add-to-repository of goal org.apache.karaf.tooling:karaf-maven-plugin:4.0.2-SNAPSHOT:features-add-to-repository failed: Can't resolve artifact null: NullPointerException -> [Help 1]
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.apache.karaf.tooling:karaf-maven-plugin:4.0.2-SNAPSHOT:features-add-to-repository (features-add-to-repository) on project myproject: Execution features-add-to-repository of goal org.apache.karaf.tooling:karaf-maven-plugin:4.0.2-SNAPSHOT:features-add-to-repository failed: Can't resolve artifact null
	at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:224)
	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:116)
	at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:80)
	at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build(SingleThreadedBuilder.java:51)
	at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:128)
	at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:307)
	at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:193)
	at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:106)
	at org.apache.maven.cli.MavenCli.execute(MavenCli.java:862)
	at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:286)
	at org.apache.maven.cli.MavenCli.main(MavenCli.java:197)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:497)
	at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:289)
	at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:229)
	at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:415)
	at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:356)
Caused by: org.apache.maven.plugin.PluginExecutionException: Execution features-add-to-repository of goal org.apache.karaf.tooling:karaf-maven-plugin:4.0.2-SNAPSHOT:features-add-to-repository failed: Can't resolve artifact null
	at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:145)
	at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:208)
	... 20 more
Caused by: java.lang.RuntimeException: Can't resolve artifact null
	at org.apache.karaf.tooling.features.AbstractFeatureMojo.resolveArtifact(AbstractFeatureMojo.java:144)
	at org.apache.karaf.tooling.features.AddToRepositoryMojo.copyBundlesToDestRepository(AddToRepositoryMojo.java:75)
	at org.apache.karaf.tooling.features.AddToRepositoryMojo.execute(AddToRepositoryMojo.java:63)
	at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:134)
	... 21 more
Caused by: java.lang.NullPointerException
	at org.apache.karaf.tooling.features.AbstractFeatureMojo.resolveArtifact(AbstractFeatureMojo.java:138)
	... 24 more

features.xml

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<features name="myfeatures" xmlns="http://karaf.apache.org/xmlns/features/v1.3.0">
   <feature name="myfeature" version="${project.version}" >
      <bundle start-level="50">blueprint:file:static-content-servlet.xml</bundle>
   </feature>
</features>

pom.xml

<plugin>
   <groupId>org.apache.karaf.tooling</groupId>
   <artifactId>karaf-maven-plugin</artifactId>
   <version>4.0.2-SNAPSHOT</version>
   <executions>
      <execution>
         <id>features-add-to-repository</id>
         <phase>prepare-package</phase>
         <goals>
            <goal>features-add-to-repository</goal>
         </goals>
         <configuration>
            <descriptors>
               <descriptor>file:features.xml</descriptor>
            </descriptors>
            <repository>target/system</repository>
            <karafVersion>4.0.1</karafVersion>
         </configuration>
      </execution>
   </executions>
</plugin>

Seems related to https://issues.apache.org/jira/browse/KARAF-3638, but different. All my other dependencies download and copy into the target repository normally.