STEP: Create Dynamic Web Project with JAX-RS Support STEP: Create resource class @Path( "/test" ) public class Resource { @GET() @Path( "/{path}" ) @Produces(MediaType.TEXT_PLAIN) public String get(@BeanParam MyPathParams pathParams) { return "Test" ; } } FAIL: There is an error in Error log Error Tue Jul 01 14:34:53 CEST 2014 org.jboss.tools.common.validation.JBTValidationException at org.jboss.tools.common.validation.ValidatorManager.validate(ValidatorManager.java:123) at org.jboss.tools.common.validation.ValidatorManager.validateInJob(ValidatorManager.java:81) at org.eclipse.wst.validation.internal.operations.ValidatorJob.run(ValidatorJob.java:78) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54) Caused by: java.lang.NullPointerException at org.jboss.tools.ws.jaxrs.ui.internal.validation.JaxrsResourceMethodValidatorDelegate.validateNoUnboundPathAnnotationTemplateParameters(JaxrsResourceMethodValidatorDelegate.java:253) at org.jboss.tools.ws.jaxrs.ui.internal.validation.JaxrsResourceMethodValidatorDelegate.internalValidate(JaxrsResourceMethodValidatorDelegate.java:91) at org.jboss.tools.ws.jaxrs.ui.internal.validation.JaxrsResourceMethodValidatorDelegate.internalValidate(JaxrsResourceMethodValidatorDelegate.java:1) at org.jboss.tools.ws.jaxrs.ui.internal.validation.AbstractJaxrsElementValidatorDelegate.validate(AbstractJaxrsElementValidatorDelegate.java:81) at org.jboss.tools.ws.jaxrs.ui.internal.validation.JaxrsResourceValidatorDelegate.internalValidate(JaxrsResourceValidatorDelegate.java:59) at org.jboss.tools.ws.jaxrs.ui.internal.validation.JaxrsResourceValidatorDelegate.internalValidate(JaxrsResourceValidatorDelegate.java:1) at org.jboss.tools.ws.jaxrs.ui.internal.validation.AbstractJaxrsElementValidatorDelegate.validate(AbstractJaxrsElementValidatorDelegate.java:81) at org.jboss.tools.ws.jaxrs.ui.internal.validation.AbstractJaxrsElementValidatorDelegate.validate(AbstractJaxrsElementValidatorDelegate.java:61) at org.jboss.tools.ws.jaxrs.ui.internal.validation.AbstractJaxrsElementValidatorDelegate.validate(AbstractJaxrsElementValidatorDelegate.java:1) at org.jboss.tools.ws.jaxrs.ui.internal.validation.JaxrsMetamodelValidator.validate(JaxrsMetamodelValidator.java:492) at org.jboss.tools.ws.jaxrs.ui.internal.validation.JaxrsMetamodelValidator.validate(JaxrsMetamodelValidator.java:380) at org.jboss.tools.ws.jaxrs.ui.internal.validation.JaxrsMetamodelValidator.validate(JaxrsMetamodelValidator.java:164) at org.jboss.tools.common.validation.ValidatorManager.validate(ValidatorManager.java:118) ... 3 more