No data show in Kibana wth vega-lite

I am new to vega-lite and trying to use the following vega-lite script

{
  "$schema": "https://vega.github.io/schema/vega-lite/v2.json",
  "title": "Event counts from all indexes",
  "data": {
    "url": {
      "%context%": true,
      "%timefield%": "_source.time_stamp",
      "index": "flexlm_license_usage-201911",
      "body": {"_source": ["time_stamp", "lic_usage"], "size": 10}
    },
    "format": {"property": "hits.hits"}
  },
  "mark": "line",
  "encoding": {
    "x": {"field": "_source.time_stamp", "type": "temporal"}
    "y": {"field": "_source.lic_usage", "type": "quantitative"}
    }
  }

In kibana, i can only see the x and y axis legend and title but no data.

Running same from dev tools, elasticsearch return following. Please suggest what i am missing here?

{
"took" : 281,
"timed_out" : false,
"_shards" : {
"total" : 2,
"successful" : 2,
"skipped" : 0,
"failed" : 0
},
"hits" : {
"total" : 98298346,
"max_score" : 1.0,
"hits" : [
{
"_index" : "flexlm_license_usage-201911",
"_type" : "doc",
"_id" : "agrlx218 ctolx622 ctolx623_cdslmd_Xcelium_SC_DMS_Option__danicant_gnbsx50536_1573272900000",
"_score" : 1.0,
"_source" : {
"time_stamp" : "2019-11-09T05:15:00+0100",
"lic_usage" : 1
}
},
{
"_index" : "flexlm_license_usage-201911",
"_type" : "doc",
"_id" : "agrlx218 ctolx622 ctolx623_snpslmd_VCSMXRunTime_Net__pistoria_ctosx00212_1573272900000",
"_score" : 1.0,
"_source" : {
"time_stamp" : "2019-11-09T05:15:00+0100",
"lic_usage" : 1
}
},
{
"_index" : "flexlm_license_usage-201911",
"_type" : "doc",
"_id" : "agrlx218 ctolx622 ctolx623_cdslmd_Xcelium_SC_DMS_Option__uppverif_gnbsx50707_1573272900000",
"_score" : 1.0,
"_source" : {
"time_stamp" : "2019-11-09T05:15:00+0100",
"lic_usage" : 4
}
},
{
"_index" : "flexlm_license_usage-201911",
"_type" : "doc",
"_id" : "agrlx218 ctolx622 ctolx623_snpslmd_VCSRuntime_Net__specq_gnbsx50743_1573272900000",
"_score" : 1.0,
"_source" : {
"time_stamp" : "2019-11-09T05:15:00+0100",
"lic_usage" : 2
}
},

Your request and vega encoding look good to me. The best way to check whether your encoding property is set up correctly is to look at VEGA_DEBUG and find the section that shows how your data looks after it's formatted.

Wylie,

Here is the output of VEGA_DEBUG. I am not sure about the error
Failed to load resource: net::ERR_NETWORK_IO_SUSPENDED
:5601/api/console/proxy?path=_aliases&method=GET:1 Failed to load resource: net::ERR_NETWORK_IO_SUSPENDED
:5601/api/console/proxy?path=_template&method=GET:1 Failed to load resource: net::ERR_NETWORK_IO_SUSPENDED
:5601/api/console/proxy?path=_mapping&method=GET:1 Failed to load resource: net::ERR_NETWORK_IO_SUSPENDED
:5601/api/console/proxy?path=_aliases&method=GET:1 Failed to load resource: net::ERR_NETWORK_IO_SUSPENDED
:5601/api/console/proxy?path=_template&method=GET:1 Failed to load resource: net::ERR_NETWORK_IO_SUSPENDED
:5601/api/console/proxy?path=_mapping&method=GET:1 Failed to load resource: net::ERR_NETWORK_IO_SUSPENDED
:5601/api/console/proxy?path=_aliases&method=GET:1 Failed to load resource: net::ERR_NETWORK_IO_SUSPENDED
:5601/api/console/proxy?path=_template&method=GET:1 Failed to load resource: net::ERR_INTERNET_DISCONNECTED
:5601/api/console/proxy?path=_mapping&method=GET:1 Failed to load resource: net::ERR_CONNECTION_REFUSED
:5601/api/console/proxy?path=_aliases&method=GET:1 Failed to load resource: net::ERR_CONNECTION_REFUSED

From the above I searched a bit and found that Kibana vega-lite is unable to reach to my ES cluster on a remote host. So i made entries in my kibana.yml

elasticsearch.hosts: ["http://xxxx:9200"]
vega.enableExternalUrls: "true"

After kibana.yml update, the above errors got vanished but still data is not showing up.
In the VEGA_DEBUG => under Network => _search is showing to following link
http://yyyy:5601/elasticsearch/flexlm_license_usage-201911/_search

however yyyy is my kibana host not Elasticsearch host. What i am missing here?

The request you showed is correct, Kibana proxies your Elasticsearch requests for you. Based on what you've shared I'm not sure what the issue is.