#vulnerable code 
                                private void execute() {
        Helper helper = new HelperImpl();

        RequestContext ctx = RequestContext.getCurrentContext();
        HttpServletRequest request = ctx.getRequest();

        RequestResponseParser r = new RequestResponseParser();
        r.setHeaders(getRequestHeadersInfo(request));
        r.setBody(helper.call().request().getBody());
        r.setUri(UrlUtil.getCurrentUrl(request));

        TraceContextHolder.getInstance().getActualTrace().setRequest(r);
    } 
                            #location 9 
                            #vulnerability type NULL_DEREFERENCE
#fixed code
                                private void execute() {
    	
        RequestContext ctx = RequestContext.getCurrentContext();
        HttpServletRequest request = ctx.getRequest();

        RequestResponseParser r = new RequestResponseParser();
        r.setHeaders(getRequestHeadersInfo(request));
        r.setBody(helper.call().request().getBody());
        r.setUri(UrlUtil.getCurrentUrl(request));

        TraceContextHolder.getInstance().getActualTrace().setRequest(r);
    }