private void warmup() {
        try {
            handle(HttpRequest.createTestRequest("/search/" +
                                                 "?timeout=2s" +
                                                 "&ranking.profile=unranked" +
                                                 "&warmup=true" +
                                                 "&metrics.ignore=true" +
                                                 "&yql=select+*+from+sources+*+where+true+limit+0;",
                                                 com.yahoo.jdisc.http.HttpRequest.Method.GET,
                                                 nullInputStream()));
        }
        catch (RuntimeException e) {
            log.log(Level.INFO, "Exception warming up search handler", e);
        }
    }
If present, responses from this will set the HTTP response header with this key to the host name of this
container-search/src/main/java/com/yahoo/search/handler/SearchHandler.java