java.util.ConcurrentModificationException
at java.util.HashMap$HashIterator.nextEntry(HashMap.java:841)
at java.util.HashMap$KeyIterator.next(HashMap.java:877)
at org.eclipse.jpt.core.internal.GenericJpaFile.dispose(GenericJpaFile.java:110)
at org.eclipse.jpt.core.internal.GenericJpaProject.removeJpaFile(GenericJpaProject.java:373)
at org.eclipse.jpt.core.internal.GenericJpaProject.dispose(GenericJpaProject.java:556)
at org.eclipse.jpt.core.internal.GenericJpaModel$DefaultJpaProjectHolder.remove(GenericJpaModel.java:478)
at org.eclipse.jpt.core.internal.GenericJpaModel.dispose(GenericJpaModel.java:329)
at org.eclipse.jpt.core.internal.JpaModelManager.stop(JpaModelManager.java:158)
at org.eclipse.jpt.core.JptCorePlugin.stop(JptCorePlugin.java:445)
at org.eclipse.osgi.framework.internal.core.BundleContextImpl$3.run(BundleContextImpl.java:1050)
at java.security.AccessController.doPrivileged(Native Method)
at org.eclipse.osgi.framework.internal.core.BundleContextImpl.stop(BundleContextImpl.java:1046)
at org.eclipse.osgi.framework.internal.core.BundleHost.stopWorker(BundleHost.java:457)
at org.eclipse.osgi.framework.internal.core.AbstractBundle.suspend(AbstractBundle.java:531)
at org.eclipse.osgi.framework.internal.core.Framework.suspendBundle(Framework.java:1104)
at org.eclipse.osgi.framework.internal.core.StartLevelManager.decFWSL(StartLevelManager.java:655)
at org.eclipse.osgi.framework.internal.core.StartLevelManager.doSetStartLevel(StartLevelManager.java:312)
at org.eclipse.osgi.framework.internal.core.StartLevelManager.shutdown(StartLevelManager.java:257)
at org.eclipse.osgi.framework.internal.core.SystemBundle.suspend(SystemBundle.java:236)
at org.eclipse.osgi.framework.internal.core.Framework.shutdown(Framework.java:678)
at org.eclipse.osgi.framework.internal.core.Framework.close(Framework.java:576)
at org.eclipse.osgi.framework.internal.core.OSGi.close(OSGi.java:41)
at org.eclipse.core.runtime.adaptor.EclipseStarter.shutdown(EclipseStarter.java:417)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:200)
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:585)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:549)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:504)
at org.eclipse.equinox.launcher.Main.run(Main.java:1236)
at org.eclipse.equinox.launcher.Main.main(Main.java:1212)