!MESSAGE Errors running builder 'JAX-RS Builder' on project 'sample2'.
!STACK 0
java.util.ConcurrentModificationException
	at java.util.HashMap$HashIterator.remove(HashMap.java:811)
	at org.jboss.tools.ws.jaxrs.core.internal.metamodel.domain.JaxrsMetamodel.unindexElement(JaxrsMetamodel.java:253)
	at org.jboss.tools.ws.jaxrs.core.internal.metamodel.domain.JaxrsMetamodel.indexElement(JaxrsMetamodel.java:177)
	at org.jboss.tools.ws.jaxrs.core.internal.metamodel.domain.JaxrsMetamodel.add(JaxrsMetamodel.java:158)
	at org.jboss.tools.ws.jaxrs.core.internal.metamodel.builder.ResourceChangedProcessor.postProcessHttpMethod(ResourceChangedProcessor.java:479)
	at org.jboss.tools.ws.jaxrs.core.internal.metamodel.builder.ResourceChangedProcessor.processHttpMethodChangesOnScopeAdditionOrChange(ResourceChangedProcessor.java:387)
	at org.jboss.tools.ws.jaxrs.core.internal.metamodel.builder.ResourceChangedProcessor.processEvent(ResourceChangedProcessor.java:176)
	at org.jboss.tools.ws.jaxrs.core.internal.metamodel.builder.ResourceChangedProcessor.processEntireProject(ResourceChangedProcessor.java:108)
	at org.jboss.tools.ws.jaxrs.core.internal.metamodel.builder.ResourceChangedProcessor.processAffectedResources(ResourceChangedProcessor.java:83)
	at org.jboss.tools.ws.jaxrs.core.internal.metamodel.builder.JaxrsMetamodelBuilder.build(JaxrsMetamodelBuilder.java:123)
	at org.jboss.tools.ws.jaxrs.core.internal.metamodel.builder.JaxrsMetamodelBuilder.build(JaxrsMetamodelBuilder.java:83)
	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)