Sergei Ivanov created MDEP-364:
----------------------------------
Summary: 'tree' goal fails with an NPE if a project uses version
ranges for dependencies
Key: MDEP-364
URL: https://jira.codehaus.org/browse/MDEP-364
Project: Maven 2.x Dependency Plugin
Issue Type: Bug
Components: tree
Affects Versions: 2.4
Environment: Apache Maven 3.0.4 (r1232337; 2012-01-17 08:44:56+0000)
Maven home: /opt/app/eti/tools/apache-maven-3.0.4
Java version: 1.6.0_15, vendor: Sun Microsystems Inc.
Default locale: en_US, platform encoding: ANSI_X3.4-1968
OS name: "linux", version: "2.6.9-42.0.8.elsmp", arch: "amd64", family: "unix"
Reporter: Sergei Ivanov
We have bound execution of _dependency:tree_ to the _verify_ phase in the
parent POM for all of our projects. That way, maven always dumps a complete
tree of dependencies for a project after it's been fully packaged and before
it's installed/deployed.
The plugin set-up looks like this:
{code:lang=xml}
<plugin>
<inherited>true</inherited>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-dependency-plugin</artifactId>
<version>2.4</version>
<executions>
<execution>
<!-- Output dependency tree at the end of build process -->
<id>display-dependency-tree</id>
<phase>verify</phase>
<goals>
<goal>tree</goal>
</goals>
</execution>
</executions>
</plugin>
{code}
Today it failed sporadically with an NPE during a routine CI build in Jenkins.
Maven options for Jenkins:
{noformat}-B --settings /home/xxxxxxxx/.m2/settings-jenkins-releases.xml -U
clean verify{noformat}
The stack trace is below:
{noformat}
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal
org.apache.maven.plugins:maven-dependency-plugin:2.4:tree
(display-dependency-tree) on project liquidity-common-server: Execution
display-dependency-tree of goal
org.apache.maven.plugins:maven-dependency-plugin:2.4:tree failed.
at
org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:225)
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:84)
at
org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:59)
at
org.apache.maven.lifecycle.internal.LifecycleStarter.singleThreadedBuild(LifecycleStarter.java:183)
at
org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:161)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:320)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:156)
at
org.jvnet.hudson.maven3.launcher.Maven3Launcher.main(Maven3Launcher.java:79)
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.plexus.classworlds.launcher.Launcher.launchStandard(Launcher.java:329)
at
org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:239)
at org.jvnet.hudson.maven3.agent.Maven3Main.launch(Maven3Main.java:158)
at hudson.maven.Maven3Builder.call(Maven3Builder.java:98)
at hudson.maven.Maven3Builder.call(Maven3Builder.java:64)
at hudson.remoting.UserRequest.perform(UserRequest.java:118)
at hudson.remoting.UserRequest.perform(UserRequest.java:48)
at hudson.remoting.Request$2.run(Request.java:287)
at
hudson.remoting.InterceptingExecutorService$1.call(InterceptingExecutorService.java:72)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
at java.util.concurrent.FutureTask.run(FutureTask.java:138)
at
java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:662)
Caused by: org.apache.maven.plugin.PluginExecutionException: Execution
display-dependency-tree of goal
org.apache.maven.plugins:maven-dependency-plugin:2.4:tree failed.
at
org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:110)
at
org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:209)
... 27 more
Caused by: java.lang.NullPointerException
at
org.apache.maven.artifact.DefaultArtifact.equals(DefaultArtifact.java:344)
at
org.apache.maven.shared.dependency.tree.DependencyNode.equals(DependencyNode.java:811)
at
org.apache.maven.shared.dependency.tree.filter.AncestorOrSelfDependencyNodeFilter.isAncestorOrSelf(AncestorOrSelfDependencyNodeFilter.java:103)
at
org.apache.maven.shared.dependency.tree.filter.AncestorOrSelfDependencyNodeFilter.accept(AncestorOrSelfDependencyNodeFilter.java:76)
at
org.apache.maven.shared.dependency.tree.traversal.FilteringDependencyNodeVisitor.visit(FilteringDependencyNodeVisitor.java:72)
at
org.apache.maven.shared.dependency.tree.DependencyNode.accept(DependencyNode.java:305)
at
org.apache.maven.shared.dependency.tree.DependencyNode.accept(DependencyNode.java:313)
at
org.apache.maven.shared.dependency.tree.DependencyNode.accept(DependencyNode.java:313)
at
org.apache.maven.plugin.dependency.TreeMojo.serializeDependencyTree(TreeMojo.java:376)
at
org.apache.maven.plugin.dependency.TreeMojo.execute(TreeMojo.java:277)
at
org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:101)
... 28 more
{noformat}
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