# Graph API not working
**URL:** https://discuss.elastic.co/t/graph-api-not-working/73797
**Category:** Elasticsearch
**Tags:** elastic-stack-graph
**Created:** [February 3, 2017, 6:33am UTC](https://discuss.elastic.co/t/graph-api-not-working/73797 "2017-02-03T06:33:00Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@ahr12](https://discuss.elastic.co/u/ahr12)
#### Post date: [February 3, 2017, 6:33am UTC](https://discuss.elastic.co/t/graph-api-not-working/73797/1 "2017-02-03T06:33:00Z")
I use graph Java API. but I am getting the NullPointerException Errors.
This is my code -\>
package org.formcept.orient;
//import java.net.InetAddress;
import java.net.InetAddress;
import java.util.Collection;
import org.elasticsearch.client.transport.TransportClient;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.transport.InetSocketTransportAddress;
import org.elasticsearch.graph.action.GraphExploreAction;
import org.elasticsearch.graph.action.GraphExploreRequestBuilder;
import org.elasticsearch.graph.action.GraphExploreResponse;
import org.elasticsearch.graph.action.Hop;
import org.elasticsearch.graph.action.Vertex;
import org.elasticsearch.index.query.QueryBuilders;
import org.elasticsearch.transport.client.PreBuiltTransportClient;
/\*\*
- Demo graph client - find elastic meetup attendees and what other meetup groups they frequent
\*/
public class EsGraph {
}
I am getting following error -:
Exception in thread "main" java.lang.NullPointerException
at org.elasticsearch.client.transport.TransportProxyClient.lambda$execute$0(TransportProxyClient.java:59)
at org.elasticsearch.client.transport.TransportClientNodesService.execute(TransportClientNodesService.java:231)
at org.elasticsearch.client.transport.TransportProxyClient.execute(TransportProxyClient.java:59)
at org.elasticsearch.client.transport.TransportClient.doExecute(TransportClient.java:345)
at org.elasticsearch.client.support.AbstractClient.execute(AbstractClient.java:403)
at org.elasticsearch.action.ActionRequestBuilder.execute(ActionRequestBuilder.java:80)
at org.elasticsearch.action.ActionRequestBuilder.execute(ActionRequestBuilder.java:54)
at org.elasticsearch.action.ActionRequestBuilder.get(ActionRequestBuilder.java:62)
at org.formcept.orient.EsGraph.main(EsGraph.java:42)
---
### Author:  [@Mark\_Harwood](https://discuss.elastic.co/u/Mark_Harwood)
#### Post date: [February 3, 2017, 9:48am UTC](https://discuss.elastic.co/t/graph-api-not-working/73797/2 "2017-02-03T09:48:59Z")
Let's start by making sure your data is at least there using the REST API. Can you provide the results of these calls:
```
curl -XGET "http://localhost:9200/meetuprsvps/_search" -d'
{
"query": {
"term": {
"_all": "elasticsearch"
}
}
}'
curl -XGET "http://localhost:9200/meetuprsvps/_xpack/_graph/_explore" -d'
{
"query": {
"term": {
"_all": "elasticsearch"
}
},
"controls": {
"use_significance": true,
"sample_size": 2000
},
"vertices": [
{
"field": "member_id"
}
],
"connections": {
"vertices": [
{
"field": "group_id"
}
]
}
}'
```
The second request is the equivalent of the Java example and the first is just to confirm you have an index with some data.
---
### Author:  [@Mark\_Harwood](https://discuss.elastic.co/u/Mark_Harwood)
#### Post date: [February 3, 2017, 11:17am UTC](https://discuss.elastic.co/t/graph-api-not-working/73797/3 "2017-02-03T11:17:05Z")
A full "Hello, World" example that is working for me on the latest 5.2 release: [https://gist.github.com/markharwood/f9e955f52908129ef364446cfec0a65e](https://gist.github.com/markharwood/f9e955f52908129ef364446cfec0a65e)
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [March 3, 2017, 11:17am UTC](https://discuss.elastic.co/t/graph-api-not-working/73797/4 "2017-03-03T11:17:45Z")
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