[m2e-wtp-dev] Error: Failed while installing JPA 2.1.

["USHAKOV, Sergey" <s-n-ushakov@xxxxxxxxx>]

Hi and sorry if posting to a wrong area.

I'm just an Eclipse user with a Maven / JPA 2.1 / EclipseLink project.

When checking out the Maven project from Subversion repository I get an error message:
Problem occurred
'Importing Maven projects' has encountered a problem.
Failed while installing JPA 2.1.
java.lang.NullPointerException

My Eclipse configuration is as follows:
- Eclipse Mars : Eclipse IDE for Java EE Developers : 4.5.0.20150621-1200
- Subclipse : 1.10.9 : org.tigris.subversion.subclipse.feature.group
- Maven SCM handler for Subclipse : 0.13.0.201312191101 : org.sonatype.m2e.subclipse.feature.feature.group
- Maven Integration for Eclipse JDT APT : 1.1.1.201411262015 : org.jboss.tools.maven.apt.feature.feature.group

The full error message with a stacktrace from workspace log is appended below. This error message occurs only once upon checking out a project into a previously clean workspace.

Please kindly advise whether I should file a bug at M2E-WTP / learn something basic / get this topic discussed in some other area / provide any more details...

Thank you in advance and best regards,
Sergey


----- Error message from workspace log -----

!ENTRY org.eclipse.wst.common.project.facet.core 4 0 2015-07-20 12:23:24.922
!MESSAGE Failed while installing JPA 2.1.
!STACK 0
java.lang.NullPointerException
	at org.eclipse.jpt.jpa.core.internal.facet.JpaFacetInstallDelegate.defaultResourceLocation(JpaFacetInstallDelegate.java:123)
	at org.eclipse.jpt.jpa.core.internal.facet.JpaFacetInstallDelegate.createPersistenceXml(JpaFacetInstallDelegate.java:107)
	at org.eclipse.jpt.jpa.core.internal.facet.JpaFacetInstallDelegate.createProjectXml(JpaFacetInstallDelegate.java:100)
	at org.eclipse.jpt.jpa.core.internal.facet.JpaFacetInstallDelegate.execute_(JpaFacetInstallDelegate.java:61)
	at org.eclipse.jpt.jpa.core.internal.facet.JpaFacetActionDelegate.execute(JpaFacetActionDelegate.java:35)
	at org.eclipse.wst.common.project.facet.core.internal.FacetedProject.callDelegate(FacetedProject.java:1477)
	at org.eclipse.wst.common.project.facet.core.internal.FacetedProject.modifyInternal(FacetedProject.java:441)
	at org.eclipse.wst.common.project.facet.core.internal.FacetedProject.mergeChangesInternal(FacetedProject.java:1181)
	at org.eclipse.wst.common.project.facet.core.internal.FacetedProject.access$2(FacetedProject.java:1117)
	at org.eclipse.wst.common.project.facet.core.internal.FacetedProject$1.run(FacetedProject.java:324)
	at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:2241)
	at org.eclipse.wst.common.project.facet.core.internal.FacetedProject.modify(FacetedProject.java:339)
	at org.eclipse.m2e.wtp.jpa.internal.configurators.JpaProjectConfigurator.configureFacets(JpaProjectConfigurator.java:152)
	at org.eclipse.m2e.wtp.jpa.internal.configurators.JpaProjectConfigurator.configure(JpaProjectConfigurator.java:108)
	at org.eclipse.m2e.core.project.configurator.AbstractLifecycleMapping.configure(AbstractLifecycleMapping.java:120)
	at org.eclipse.m2e.core.internal.project.ProjectConfigurationManager$3.call(ProjectConfigurationManager.java:501)
	at org.eclipse.m2e.core.internal.project.ProjectConfigurationManager$3.call(ProjectConfigurationManager.java:1)
	at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.executeBare(MavenExecutionContext.java:176)
	at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.execute(MavenExecutionContext.java:151)
	at org.eclipse.m2e.core.internal.project.ProjectConfigurationManager.updateProjectConfiguration(ProjectConfigurationManager.java:494)
	at org.eclipse.m2e.core.internal.project.ProjectConfigurationManager.configureNewMavenProjects(ProjectConfigurationManager.java:281)
	at org.eclipse.m2e.core.internal.project.ProjectConfigurationManager$1.call(ProjectConfigurationManager.java:168)
	at org.eclipse.m2e.core.internal.project.ProjectConfigurationManager$1.call(ProjectConfigurationManager.java:1)
	at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.executeBare(MavenExecutionContext.java:176)
	at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.execute(MavenExecutionContext.java:151)
	at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.execute(MavenExecutionContext.java:99)
	at org.eclipse.m2e.core.internal.embedder.MavenImpl.execute(MavenImpl.java:1355)
	at org.eclipse.m2e.core.internal.project.ProjectConfigurationManager.importProjects(ProjectConfigurationManager.java:136)
	at org.eclipse.m2e.core.ui.internal.wizards.ImportMavenProjectsJob$1.doCreateMavenProjects(ImportMavenProjectsJob.java:68)
	at org.eclipse.m2e.core.ui.internal.wizards.AbstractCreateMavenProjectsOperation.run(AbstractCreateMavenProjectsOperation.java:62)
	at org.eclipse.m2e.core.ui.internal.wizards.ImportMavenProjectsJob.runInWorkspace(ImportMavenProjectsJob.java:77)
	at org.eclipse.core.internal.resources.InternalWorkspaceJob.run(InternalWorkspaceJob.java:39)
	at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55)