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The following stack trace is being thrown during a project buid. It leaves a red X on the pom.xml, but the project builds correctly. I've seen this with both 1.0 and 1.1.0-SNAPSHOT versions of m2e. eclipse.buildId=M20110909-1335 java.version=1.6.0_26 java.vendor=Sun Microsystems Inc. BootLoader constants: OS=linux, ARCH=x86, WS=gtk, NL=en_US Command-line arguments: -os linux -ws gtk -arch x86 Error Tue Nov 08 13:35:28 EST 2011 Errors running builder 'Maven Project Builder' on project 'TurmericASV1Impl'. java.lang.NullPointerException at org.eclipse.m2e.core.internal.lifecyclemapping.LifecycleMappingFactory.getMavenPluginEmbeddedMetadataSources(LifecycleMappingFactory.java:260) at org.eclipse.m2e.core.internal.lifecyclemapping.LifecycleMappingFactory.getProjectMetadataSources(LifecycleMappingFactory.java:240) at org.eclipse.m2e.core.internal.lifecyclemapping.LifecycleMappingFactory.calculateEffectiveLifecycleMappingMetadata(LifecycleMappingFactory.java:210) at org.eclipse.m2e.core.internal.lifecyclemapping.LifecycleMappingFactory.calculateLifecycleMapping(LifecycleMappingFactory.java:170) at org.eclipse.m2e.core.internal.project.registry.ProjectRegistryManager.setupLifecycleMapping(ProjectRegistryManager.java:526) at org.eclipse.m2e.core.internal.project.registry.ProjectRegistryManager.refresh(ProjectRegistryManager.java:445) at org.eclipse.m2e.core.internal.project.registry.ProjectRegistryManager.refresh(ProjectRegistryManager.java:327) at org.eclipse.m2e.core.internal.project.registry.ProjectRegistryManager.refresh(ProjectRegistryManager.java:278) 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:728) 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:54)
You've probably defined an incomplete lifecycle mapping.
I have got a similar problem but with another trace: eclipse.buildId=M20110909-1335 java.version=1.6.0_22 java.vendor=Sun Microsystems Inc. BootLoader constants: OS=win32, ARCH=x86, WS=win32, NL=de_DE Framework arguments: -product org.eclipse.epp.package.rcp.product Command-line arguments: -os win32 -ws win32 -arch x86 -product org.eclipse.epp.package.rcp.product Error Thu Nov 10 09:54:47 CET 2011 Errors running builder 'Maven Project Builder' on project 'MYProject'. org.eclipse.m2e.core.internal.project.registry.StaleMutableProjectRegistryException at org.eclipse.m2e.core.internal.project.registry.ProjectRegistry.apply(ProjectRegistry.java:57) at org.eclipse.m2e.core.internal.project.registry.ProjectRegistryManager.applyMutableProjectRegistry(ProjectRegistryManager.java:845) at org.eclipse.m2e.core.internal.project.registry.ProjectRegistryManager.refresh(ProjectRegistryManager.java:280) at org.eclipse.m2e.core.internal.project.registry.MavenProjectManager.refresh(MavenProjectManager.java:58) at org.eclipse.m2e.core.internal.builder.MavenBuilder.build(MavenBuilder.java:120) at org.eclipse.core.internal.events.BuildManager$2.run(BuildManager.java:728) 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:54)
*** Bug 363822 has been marked as a duplicate of this bug. ***
closing old/stale bugreports
Moved to https://github.com/eclipse-m2e/m2e-core/issues/
