[MRRESOURCES-58] 'process' goal fails with NPE at the root of a reactor if child modules use version ranges for dependencies

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.2.1, 1.3
• Fix Version/s: 1.5

Environment

Apache Maven 3.0.3 (r1075438; 2011-02-28 17:31:09+0000)
Java version: 1.6.0_25, vendor: Sun Microsystems Inc.
Default locale: en_GB, platform encoding: UTF-8
OS name: "windows xp", version: "5.1", arch: "x86", family: "windows"

• Flags: Patch
• Assignee: Daniel Kulp
• Reporter: Sergei S. Ivanov
• Created: 26/Feb/12 19:39
• Updated: 05/Apr/15 14:53
• Resolved: 08/Jul/13 12:18

Description

When the maven-remote-resources-plugin:process goal is integrated into the lifecycle of a parent project in a multi-module reactor build, the goal fails with an NPE if dependency version ranges are used in the child modules. Additionally, "runOnlyAtExecutionRoot" option needs to be set to true in order to recreate the problem. Please see the attached test project that demonstrates the problem.

Full exception trace is as follows:

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-remote-resources-plugin:1.2.1:process (process-remote-resources) on project test-parent: Execution process-remote-resources of goal org.apache.maven.plugins:maven-remote-resources-plugin:1.2.1:process failed. NullPointerException -> [Help 1]
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.apache.maven.plugins:maven-remote-resources-plugin:1.2.1:process (process-remote-resources) on project test-parent: Execution process-remote-resources of goal org.apache.maven.plugins:maven-remote-resources-plugin:1.2.1:process 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:319)
	at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:156)
	at org.apache.maven.cli.MavenCli.execute(MavenCli.java:537)
	at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:196)
	at org.apache.maven.cli.MavenCli.main(MavenCli.java:141)
	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.launchEnhanced(Launcher.java:290)
	at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:230)
	at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:409)
	at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:352)
	at org.codehaus.classworlds.Launcher.main(Launcher.java:47)
	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 com.intellij.rt.execution.application.AppMain.main(AppMain.java:120)
Caused by: org.apache.maven.plugin.PluginExecutionException: Execution process-remote-resources of goal org.apache.maven.plugins:maven-remote-resources-plugin:1.2.1:process failed.
	at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:110)
	at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:209)
	... 25 more
Caused by: java.lang.NullPointerException
	at org.apache.maven.artifact.DefaultArtifact.equals(DefaultArtifact.java:344)
	at java.util.HashMap.put(HashMap.java:376)
	at java.util.HashSet.add(HashSet.java:200)
	at java.util.AbstractCollection.addAll(AbstractCollection.java:305)
	at org.apache.maven.plugin.resources.remote.ProcessRemoteResourcesMojo.aggregateProjectDependencyArtifacts(ProcessRemoteResourcesMojo.java:749)
	at org.apache.maven.plugin.resources.remote.ProcessRemoteResourcesMojo.getProjects(ProcessRemoteResourcesMojo.java:624)
	at org.apache.maven.plugin.resources.remote.ProcessRemoteResourcesMojo.configureVelocityContext(ProcessRemoteResourcesMojo.java:988)
	at org.apache.maven.plugin.resources.remote.ProcessRemoteResourcesMojo.execute(ProcessRemoteResourcesMojo.java:511)
	at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:101)
	... 26 more

Issue Links

• is related to: MDEP-364 'tree' goal fails with an NPE if a project uses version ranges for dependencies