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Home » Newcomers » Newcomers » 'Building workspace' has encountered a probelm. Errors occurred during the build.(Errors occurred during the build. Errors running builder 'Maven Project Builder' on project XXXXX. java.lang.NullPointerException)
'Building workspace' has encountered a probelm. Errors occurred during the build. [message #1064606] Thu, 20 June 2013 08:19
TenLeftFingers . is currently offline TenLeftFingers .Friend
Messages: 4
Registered: November 2012
Junior Member
I'm getting these errors on a regular basis with a new Eclipse Juno install. They result in a popup dialogue giving the summary error, but more importantly I have to assume that my project isn't building correctly. Do these two stack traces reveal the underlying issue? It pops up every time I save a file.

My Eclipse installation dir looks like this:
/eclipse-ProjectName
->eclipse
->workspace

This is the default from the downloaded zip from eclipse.org, but I installed the plugins I need and then re-zipped to eclipseWithPlugins-w32.zip. I'm using this as a template for all my projects but I'm suspicious now that it is causing confusion to Eclipse.

Many thanks,
Ten

Errors running builder 'Maven Project Builder' on project XXXXX.

java.lang.NullPointerException
	at org.eclipse.m2e.core.internal.lifecyclemapping.LifecycleMappingFactory.getDefaultLifecycleMappingMetadataSource(LifecycleMappingFactory.java:1089)
	at org.eclipse.m2e.core.internal.lifecyclemapping.LifecycleMappingFactory.getProjectMetadataSources(LifecycleMappingFactory.java:287)
	at org.eclipse.m2e.core.internal.lifecyclemapping.LifecycleMappingFactory.calculateEffectiveLifecycleMappingMetadata(LifecycleMappingFactory.java:244)
	at org.eclipse.m2e.core.internal.lifecyclemapping.LifecycleMappingFactory.calculateLifecycleMapping(LifecycleMappingFactory.java:182)
	at org.eclipse.m2e.core.internal.project.registry.ProjectRegistryManager.setupLifecycleMapping(ProjectRegistryManager.java:525)
	at org.eclipse.m2e.core.internal.project.registry.ProjectRegistryManager.refresh(ProjectRegistryManager.java:444)
	at org.eclipse.m2e.core.internal.project.registry.ProjectRegistryManager.refresh(ProjectRegistryManager.java:326)
	at org.eclipse.m2e.core.internal.project.registry.ProjectRegistryManager.refresh(ProjectRegistryManager.java:277)
	at org.eclipse.m2e.core.internal.project.registry.MavenProjectManager.refresh(MavenProjectManager.java:58)
	at org.eclipse.m2e.core.internal.builder.MavenBuilder.build(MavenBuilder.java:87)
	at org.eclipse.core.internal.events.BuildManager$2.run(BuildManager.java:726)
	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
	at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:199)
	at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:239)
	at org.eclipse.core.internal.events.BuildManager$1.run(BuildManager.java:292)
	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
	at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:295)
	at org.eclipse.core.internal.events.BuildManager.basicBuildLoop(BuildManager.java:351)
	at org.eclipse.core.internal.events.BuildManager.build(BuildManager.java:374)
	at org.eclipse.core.internal.events.AutoBuildJob.doBuild(AutoBuildJob.java:143)
	at org.eclipse.core.internal.events.AutoBuildJob.run(AutoBuildJob.java:241)
	at org.eclipse.core.internal.jobs.Worker.run(Worker.java:53)




Problems occurred when invoking code from plug-in: "org.eclipse.core.resources".

java.lang.NullPointerException
	at org.eclipse.m2e.core.internal.lifecyclemapping.LifecycleMappingFactory.getDefaultLifecycleMappingMetadataSource(LifecycleMappingFactory.java:1089)
	at org.eclipse.m2e.core.internal.lifecyclemapping.LifecycleMappingFactory.getProjectMetadataSources(LifecycleMappingFactory.java:287)
	at org.eclipse.m2e.core.internal.lifecyclemapping.LifecycleMappingFactory.calculateEffectiveLifecycleMappingMetadata(LifecycleMappingFactory.java:244)
	at org.eclipse.m2e.core.internal.lifecyclemapping.LifecycleMappingFactory.calculateLifecycleMapping(LifecycleMappingFactory.java:182)
	at org.eclipse.m2e.core.internal.project.registry.ProjectRegistryManager.setupLifecycleMapping(ProjectRegistryManager.java:525)
	at org.eclipse.m2e.core.internal.project.registry.ProjectRegistryManager.refresh(ProjectRegistryManager.java:444)
	at org.eclipse.m2e.core.internal.project.registry.ProjectRegistryManager.refresh(ProjectRegistryManager.java:326)
	at org.eclipse.m2e.core.internal.project.registry.ProjectRegistryManager.refresh(ProjectRegistryManager.java:277)
	at org.eclipse.m2e.core.internal.project.registry.MavenProjectManager.refresh(MavenProjectManager.java:58)
	at org.eclipse.m2e.core.internal.builder.MavenBuilder.build(MavenBuilder.java:87)
	at org.eclipse.core.internal.events.BuildManager$2.run(BuildManager.java:726)
	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
	at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:199)
	at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:239)
	at org.eclipse.core.internal.events.BuildManager$1.run(BuildManager.java:292)
	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
	at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:295)
	at org.eclipse.core.internal.events.BuildManager.basicBuildLoop(BuildManager.java:351)
	at org.eclipse.core.internal.events.BuildManager.build(BuildManager.java:374)
	at org.eclipse.core.internal.events.AutoBuildJob.doBuild(AutoBuildJob.java:143)
	at org.eclipse.core.internal.events.AutoBuildJob.run(AutoBuildJob.java:241)
	at org.eclipse.core.internal.jobs.Worker.run(Worker.java:53)

[Updated on: Thu, 20 June 2013 09:40]

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