# Interacting with elasticsearch on EC2 via Java API
**URL:** https://discuss.elastic.co/t/interacting-with-elasticsearch-on-ec2-via-java-api/28818
**Category:** Elasticsearch
**Created:** [September 8, 2015, 7:25am UTC](https://discuss.elastic.co/t/interacting-with-elasticsearch-on-ec2-via-java-api/28818 "2015-09-08T07:25:16Z")
**Posts on this page:** 5
**Page:** 1
### Author:  [@supernovae](https://discuss.elastic.co/u/supernovae)
#### Post date: [September 8, 2015, 7:25am UTC](https://discuss.elastic.co/t/interacting-with-elasticsearch-on-ec2-via-java-api/28818/1 "2015-09-08T07:25:16Z")
Hi, I wrote a program for deleting records according to their timestamp from an elasticsearch node running on an EC2 machine. When I run the program from my local machine, I can connect to the ES node via public IP address and it works as expected. If I try to execute the same program from another EC2 instance within the same availability zone and security group I get an empty result of the execution.
This is how i connect to ES:
```
TransportClient transportClient = new TransportClient();
this.esClient = transportClient.addTransportAddress(new InetSocketTransportAddress(es_address, 9300));
```
This is the relevant part of code
```
FilterBuilder fb = new IndicesFilterBuilder(new RangeFilterBuilder("timestamp")
.from(params.get("start_date"))
.to(params.get("end_date"))
.includeLower(false)
.includeUpper(true), "test").noMatchFilter("none");
//search
SearchResponse sr = this.esClient.prepareSearch()
.setQuery(new MatchAllQueryBuilder())
.setPostFilter(fb)
.setScroll(new TimeValue(10000))
.setSize(10000)//keep the scroll context alive for 10 seconds
.get();
LOG.info("Search request completed in : " + sr.getTook() + " "+ sr.getHits().getTotalHits());
//scroll the result
boolean scroll = true;
while(scroll)
{
for(SearchHit hit : sr.getHits().getHits())
{
bp.add(new DeleteRequest(hit.getIndex(), hit.getType(), hit.getId()));
}
sr = this.esClient.prepareSearchScroll(sr.getScrollId())
.setScroll(new TimeValue(10000)) //keep the scroll context alive for 10 seconds
.get();
LOG.info("Search request completed in : " + sr.getTook());
if (sr.getHits().getHits().length == 0) { //no more results
scroll = false;
}
}
```
According to the program output, I can connect to the node, but from my local machine the search request returns hits and then deletes them, instread from another EC2 instance the same search returns 0 documents. I am not using AWS plugin.
PS. I have a spark and a storm cluster running in the same VPC feeding correctly the same node.
---
### Author:  [@dadoonet](https://discuss.elastic.co/u/dadoonet)
#### Post date: [September 8, 2015, 7:39am UTC](https://discuss.elastic.co/t/interacting-with-elasticsearch-on-ec2-via-java-api/28818/2 "2015-09-08T07:39:47Z")
I'm wondering if you actually hit the exact same cluster or by any chance another one?
So I would try from the application to print the cluster state for example and see if it's the same in both cases.
---
### Author:  [@supernovae](https://discuss.elastic.co/u/supernovae)
#### Post date: [September 8, 2015, 7:56am UTC](https://discuss.elastic.co/t/interacting-with-elasticsearch-on-ec2-via-java-api/28818/3 "2015-09-08T07:56:06Z")
No it is the same node.
this is from my local computer
```
08:50:53.823 [main] DEBUG org.elasticsearch.client.transport - [Anne-Marie Cortez] adding address [[#transport#-1][Matteos-MBP.local][inet[/52.18.78.197:9300]]]
08:50:53.950 [main] DEBUG org.elasticsearch.transport.netty - [Anne-Marie Cortez] connected to node [[#transport#-1][Matteos-MBP.local][inet[/52.18.78.197:9300]]]
08:50:54.121 [main] DEBUG org.elasticsearch.transport.netty - [Anne-Marie Cortez] connected to node [[analytics_node001][5z2etnq6QlCwzENDN9MoxQ][ip-172-31-23-179][inet[/52.18.78.197:9300]]{master=true}]
```
and this is from another ec2 instance
```
07:54:03.133 [main] DEBUG org.elasticsearch.client.transport - [Dragonwing] adding address [[#transport#-1][ip-172-31-24-41][inet[/52.18.78.197:9300]]]
07:54:03.204 [main] DEBUG org.elasticsearch.transport.netty - [Dragonwing] connected to node [[#transport#-1][ip-172-31-24-41][inet[/52.18.78.197:9300]]]
07:54:03.285 [main] DEBUG org.elasticsearch.transport.netty - [Dragonwing] connected to node [[analytics_node001][5z2etnq6QlCwzENDN9MoxQ][ip-172-31-23-179][inet[/52.18.78.197:9300]]{master=true}]
```
From within the ec2 VPC I used the private ip of the es node, but I get no hits also when using the public ip
---
### Author:  [@supernovae](https://discuss.elastic.co/u/supernovae)
#### Post date: [September 8, 2015, 8:17am UTC](https://discuss.elastic.co/t/interacting-with-elasticsearch-on-ec2-via-java-api/28818/4 "2015-09-08T08:17:35Z")
Ok, it was a very stupid mistake caused by the different system times between my pc and any remote EC2 instance
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [July 5, 2017, 11:51pm UTC](https://discuss.elastic.co/t/interacting-with-elasticsearch-on-ec2-via-java-api/28818/5 "2017-07-05T23:51:42Z")