Nathaniel Mishkin created MASSEMBLY-626:
-------------------------------------------
Summary: NullPointerException in PlexusIoURLResource.getContents
Key: MASSEMBLY-626
URL: https://jira.codehaus.org/browse/MASSEMBLY-626
Project: Maven 2.x Assembly Plugin
Issue Type: Bug
Affects Versions: 2.3
Reporter: Nathaniel Mishkin
I have a situation where I can reliably reproduce an NPE during assembly in one
dev environment but not in another. Probably the most notable difference
between the environments is that the working one is running Windows and the
non-working one is running Linux, but it's not clear why that should matter.
The project is unfortunately part of a large multi-module project so I can't
readily attach it here and I haven't yet attempted to boil it down. So
hopefully this stack trace will help:
[ERROR] Failed to execute goal
org.apache.maven.plugins:maven-assembly-plugin:2.3:single (default) on project
system-tests: Execution default of goal
org.apache.maven.plugins:maven-assembly-plugin:2.3:single failed.
NullPointerException -> [Help 1]
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal
org.apache.maven.plugins:maven-assembly-plugin:2.3:single (default) on project
system-tests: Execution default of goal
org.apache.maven.plugins:maven-assembly-plugin:2.3:single 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.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)
Caused by: org.apache.maven.plugin.PluginExecutionException: Execution default
of goal org.apache.maven.plugins:maven-assembly-plugin:2.3:single failed.
at
org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:110)
at
org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:209)
... 19 more
Caused by: java.lang.NullPointerException
at
org.codehaus.plexus.components.io.resources.PlexusIoURLResource.getContents(PlexusIoURLResource.java:38)
at
org.codehaus.plexus.archiver.ArchiveEntry.getInputStream(ArchiveEntry.java:106)
at
org.codehaus.plexus.archiver.zip.AbstractZipArchiver.zipFile(AbstractZipArchiver.java:552)
at
org.codehaus.plexus.archiver.zip.AbstractZipArchiver.addResources(AbstractZipArchiver.java:387)
at
org.codehaus.plexus.archiver.zip.AbstractZipArchiver.createArchiveMain(AbstractZipArchiver.java:312)
at
org.codehaus.plexus.archiver.zip.AbstractZipArchiver.execute(AbstractZipArchiver.java:211)
at
org.codehaus.plexus.archiver.AbstractArchiver.createArchive(AbstractArchiver.java:897)
at
org.apache.maven.plugin.assembly.archive.archiver.AssemblyProxyArchiver.createArchive(AssemblyProxyArchiver.java:512)
at
org.apache.maven.plugin.assembly.archive.DefaultAssemblyArchiver.createArchive(DefaultAssemblyArchiver.java:185)
at
org.apache.maven.plugin.assembly.mojos.AbstractAssemblyMojo.execute(AbstractAssemblyMojo.java:452)
at
org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:101)
... 20 more
The relevant bit of the effective POM is pretty simple, but here it is anyway:
<plugin>
<artifactId>maven-assembly-plugin</artifactId>
<version>2.3</version>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>single</goal>
</goals>
<configuration>
<descriptorRefs>
<descriptorRef>jar-with-dependencies</descriptorRef>
</descriptorRefs>
</configuration>
</execution>
</executions>
<configuration>
<descriptorRefs>
<descriptorRef>jar-with-dependencies</descriptorRef>
</descriptorRefs>
</configuration>
</plugin>
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