STEP: Create jaxrs project STEP: Create http annotation: import java.lang.annotation.Documented; import javax.ws.rs.HttpMethod; @Documented @HttpMethod public @ interface MyAnnot { } STEP: save the file (to trigger jaxrs validation) FAIL: NPE thrown in error log: org.jboss.tools.common.validation.JBTValidationException at org.jboss.tools.common.validation.ValidatorManager.validateInJob(ValidatorManager.java:101) at org.eclipse.wst.validation.internal.operations.ValidatorJob.run(ValidatorJob.java:78) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:53) Caused by: java.lang.NullPointerException at org.jboss.tools.ws.jaxrs.core.internal.metamodel.validation.JaxrsHttpMethodValidatorDelegate.validateHttpMethodAnnotation(JaxrsHttpMethodValidatorDelegate.java:66) at org.jboss.tools.ws.jaxrs.core.internal.metamodel.validation.JaxrsHttpMethodValidatorDelegate.validate(JaxrsHttpMethodValidatorDelegate.java:45) at org.jboss.tools.ws.jaxrs.core.internal.metamodel.validation.JaxrsMetamodelValidator.validate(JaxrsMetamodelValidator.java:253) at org.jboss.tools.ws.jaxrs.core.internal.metamodel.validation.JaxrsMetamodelValidator.validate(JaxrsMetamodelValidator.java:168) at org.jboss.tools.ws.jaxrs.core.internal.metamodel.validation.JaxrsMetamodelValidator.validate(JaxrsMetamodelValidator.java:118) at org.jboss.tools.common.validation.ValidatorManager.validate(ValidatorManager.java:117) at org.jboss.tools.common.validation.ValidatorManager.validateInJob(ValidatorManager.java:81) ... 2 more