Alex McManus created MNG-5288:
---------------------------------
Summary: NullPointerException thrown by DefaultExceptionHandler,
obscuring underlying ProjectBuildingException
Key: MNG-5288
URL: https://jira.codehaus.org/browse/MNG-5288
Project: Maven 2 & 3
Issue Type: Bug
Components: Errors
Affects Versions: 3.0.4
Environment: Linux 2.6.32-5-686
Reporter: Alex McManus
Running the Maven build with -X, I get the following stack trace from Maven:
{code}
[ERROR] Error executing Maven.
java.lang.NullPointerException
at
org.apache.maven.exception.DefaultExceptionHandler.handle(DefaultExceptionHandler.java:104)
at
org.apache.maven.exception.DefaultExceptionHandler.handleException(DefaultExceptionHandler.java:89)
at org.apache.maven.cli.MavenCli.execute(MavenCli.java:553)
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)
{code}
The underlying problem in my build is a custom plugin that fails to resolve an
artifact. I can solve this, but clearly NPEs in Maven's error handling code is
not good. I can see the original exception by putting in an explicit try-catch
in the plugin:
{code}
org.apache.maven.project.ProjectBuildingException: Error resolving project
artifact: Could not find artifact
org.oclc.merlins.service-directory:service-directory-api:pom:1.16.0 for project
org.oclc.merlins.service-directory:service-directory-api:pom:1.16.0
at
org.apache.maven.project.DefaultProjectBuilder.build(DefaultProjectBuilder.java:296)
at
org.apache.maven.project.DefaultProjectBuilder.build(DefaultProjectBuilder.java:267)
at org.apache.maven.project.ProjectBuilder$build.call(Unknown Source)
at
org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:42)
at
org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:108)
at
org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:120)
at
org.oclc.build.tools.mojo.MavenContext.getMavenContext(MavenContext.groovy:374)
at org.oclc.build.tools.mojo.MavenContext$getMavenContext.call(Unknown
Source)
at
org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:42)
at
org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:108)
at
org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:116)
at
org.oclc.build.tools.api.plugin.check.CheckApiMojo.execute(CheckApiMojo.groovy:120)
at
org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:101)
at
org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:209)
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.sonatype.aether.resolution.ArtifactResolutionException: Could
not find artifact
org.oclc.merlins.service-directory:service-directory-api:pom:1.16.0
at
org.sonatype.aether.impl.internal.DefaultArtifactResolver.resolve(DefaultArtifactResolver.java:538)
at
org.sonatype.aether.impl.internal.DefaultArtifactResolver.resolveArtifacts(DefaultArtifactResolver.java:216)
at
org.sonatype.aether.impl.internal.DefaultArtifactResolver.resolveArtifact(DefaultArtifactResolver.java:193)
at
org.sonatype.aether.impl.internal.DefaultRepositorySystem.resolveArtifact(DefaultRepositorySystem.java:286)
at
org.apache.maven.project.DefaultProjectBuilder.build(DefaultProjectBuilder.java:285)
... 32 more
Caused by: org.sonatype.aether.transfer.ArtifactNotFoundException: Could not
find artifact
org.oclc.merlins.service-directory:service-directory-api:pom:1.16.0
at
org.sonatype.aether.impl.internal.DefaultArtifactResolver.resolve(DefaultArtifactResolver.java:528)
... 36 more
{code}
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators:
https://jira.codehaus.org/secure/ContactAdministrators!default.jspa
For more information on JIRA, see: http://www.atlassian.com/software/jira
