I've implemented a JBoss rest service using JBoss RestEasy on JBoss EAP7 .

I've implemented a ContainerRequestFilter that is going to log the incoming request as follows:

public void filter(ContainerRequestContext containerRequestContext) throws IOException {

        //Get request headers

        final MultivaluedMap<String, String> headers = containerRequestContext.getHeaders();

        String httpMethod = containerRequestContext.getRequest().getMethod();

        logger.info(httpMethod.toUpperCase() + " " + uriInfo.getPath());

        InputStream is = containerRequestContext.getEntityStream();

        MessageBodyReader messageBodyReader = providers.getMessageBodyReader(Form.class, Form.class, new Annotation[0], MediaType.APPLICATION_FORM_URLENCODED_TYPE);

        boolean isReadAble = messageBodyReader.isReadable(Form.class, Form.class, new Annotation[0], MediaType.MULTIPART_FORM_DATA_TYPE);

        Form form = (Form) messageBodyReader.readFrom(Form.class, Form.class, new Annotation[0], MediaType.MULTIPART_FORM_DATA_TYPE, headers, is);

I have 2 problems.

1) When the messageBodyReader.readFrom(Form.class, Form.class, new Annotation[0], MediaType.MULTIPART_FORM_DATA_TYPE, headers, is); line is called for the first time I'm getting an ArrayIndexOutOfBounds Exception.  Any subsequent calls work do not return the exception. 

2)  When the messageBodyReader.readFrom method completed successfully I get returned a javax.ws.rs.core.Form but there is no form data in the  parameters MultivaluedMap.

Any help would be appreciated.