I have a problem with the Eclipse IDE (Juno RE 2) equipped with jboss development studio. I have several Maven projects working with JPA. In these projects, Eclipse reports the error "This project has a JPA face, but the JPA project cannot be created. See the Error Log for more details.
When I see the .log file in the workspace's .metadata folder, I see this exception:
java.lang.AbstractMethodError: org.jboss.tools.hibernate.jpt.core.internal.jpa2.HibernateJpa2_0PlatformFactory.buildJpaPlatform(Lorg/eclipse/jpt/jpa/core/JpaPlatform$Config;)Lorg/eclipse/jpt/jpa/core/JpaPlatform; at org.eclipse.jpt.jpa.core.internal.platform.InternalJpaPlatformConfig.buildJpaPlatform(InternalJpaPlatformConfig.java:109) at org.eclipse.jpt.jpa.core.internal.platform.InternalJpaPlatformConfig.getJpaPlatform(InternalJpaPlatformConfig.java:102) at org.eclipse.jpt.jpa.core.internal.platform.InternalJpaPlatformManager.getJpaPlatform(InternalJpaPlatformManager.java:288) at org.eclipse.jpt.jpa.core.internal.InternalJpaProjectManager.getJpaPlatform(InternalJpaProjectManager.java:666) at org.eclipse.jpt.jpa.core.internal.InternalJpaProjectManager.buildJpaProjectConfig(InternalJpaProjectManager.java:653) at org.eclipse.jpt.jpa.core.internal.InternalJpaProjectManager.buildJpaProject(InternalJpaProjectManager.java:623) at org.eclipse.jpt.jpa.core.internal.InternalJpaProjectManager.addJpaProject(InternalJpaProjectManager.java:604) at org.eclipse.jpt.jpa.core.internal.InternalJpaProjectManager.buildJpaProject_(InternalJpaProjectManager.java:303) at org.eclipse.jpt.jpa.core.internal.InternalJpaProjectManager$BuildJpaProjectCommand.execute(InternalJpaProjectManager.java:297) at org.eclipse.jpt.common.core.internal.utility.command.CommandJobCommandAdapter.execute(CommandJobCommandAdapter.java:50) at org.eclipse.jpt.common.core.internal.utility.command.JobCommandJob.run(JobCommandJob.java:42) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:53)
I really cannot find the cause of this error. I also cannot go around my head. Any explanation and help would be appreciated.
Edit: Alternatively, when I say maven to update the project, I get
java.lang.NoClassDefFoundError: org/eclipse/jpt/jpa/core/JpaFacet at org.jboss.tools.maven.jpa.configurators.JpaProjectConfigurator.canConfigure(JpaProjectConfigurator.java:171) at org.jboss.tools.maven.jpa.configurators.JpaProjectConfigurator.configure(JpaProjectConfigurator.java:73) at org.eclipse.m2e.core.project.configurator.AbstractLifecycleMapping.configure(AbstractLifecycleMapping.java:109) at org.eclipse.m2e.core.internal.project.ProjectConfigurationManager.updateProjectConfiguration(ProjectConfigurationManager.java:413) at org.eclipse.m2e.core.internal.project.ProjectConfigurationManager.updateProjectConfiguration(ProjectConfigurationManager.java:350) at org.eclipse.m2e.core.ui.internal.UpdateMavenProjectJob.runInWorkspace(UpdateMavenProjectJob.java:74) at org.eclipse.core.internal.resources.InternalWorkspaceJob.run(InternalWorkspaceJob.java:38) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:53)
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