# Logstash not connecting elasticsearch?

**URL:** <https://discuss.elastic.co/t/logstash-not-connecting-elasticsearch/20968>\
**Category:** Elasticsearch\
**Created:** [November 27, 2014, 9:26am UTC](https://discuss.elastic.co/t/logstash-not-connecting-elasticsearch/20968 "2014-11-27T09:26:37Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![Siddharth\_Trikha](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/siddharth_trikha/32/133867_2.png) [@Siddharth\_Trikha](https://discuss.elastic.co/u/Siddharth_Trikha)\
**Post date:** [November 27, 2014, 9:26am UTC](https://discuss.elastic.co/t/logstash-not-connecting-elasticsearch/20968/1 "2014-11-27T09:26:37Z")

</div>

I am running ELK setup on a single machine. Everything was working fine  
untill I switched off my internet connection.

My logstash console shows this error when I switch off Internet connection:

```
log4j, [2014-11-27T10:31:57.480] WARN: 

```

org.elasticsearch.transport.netty: [logstash-HP-Pro] exception caught on  
transport layer [[id: 0x7a124750]], closing connection  
java.net.SocketException: Network is unreachable  
at sun.nio.ch.Net.connect0(Native Method)  
at sun.nio.ch.Net.connect(Net.java:465)  
at sun.nio.ch.Net.connect(Net.java:457)  
at sun.nio.ch.SocketChannelImpl.connect(SocketChannelImpl.java:670)  
at  
org.elasticsearch.common.netty.channel.socket.nio.NioClientSocketPipelineSink.connect(NioClientSocketPipelineSink.java:108)  
at  
org.elasticsearch.common.netty.channel.socket.nio.NioClientSocketPipelineSink.eventSunk(NioClientSocketPipelineSink.java:70)  
at  
org.elasticsearch.common.netty.channel.DefaultChannelPipeline.sendDownstream(DefaultChannelPipeline.java:574)  
at  
org.elasticsearch.common.netty.channel.Channels.connect(Channels.java:634)  
at  
org.elasticsearch.common.netty.channel.AbstractChannel.connect(AbstractChannel.java:207)  
at  
org.elasticsearch.common.netty.bootstrap.ClientBootstrap.connect(ClientBootstrap.java:229)  
at  
org.elasticsearch.common.netty.bootstrap.ClientBootstrap.connect(ClientBootstrap.java:182)  
at  
org.elasticsearch.transport.netty.NettyTransport.connectToChannels(NettyTransport.java:705)  
at  
org.elasticsearch.transport.netty.NettyTransport.connectToNode(NettyTransport.java:647)  
at  
org.elasticsearch.transport.netty.NettyTransport.connectToNode(NettyTransport.java:615)  
at  
org.elasticsearch.transport.TransportService.connectToNode(TransportService.java:129)  
at  
org.elasticsearch.discovery.zen.ZenDiscovery.innerJoinCluster(ZenDiscovery.java:338)  
at  
org.elasticsearch.discovery.zen.ZenDiscovery.access$500(ZenDiscovery.java:79)  
at  
org.elasticsearch.discovery.zen.ZenDiscovery$1.run(ZenDiscovery.java:286)  
at  
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)  
at  
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)  
at java.lang.Thread.run(Thread.java:744)

**_EDIT_**

Logstash output config:

```
output {

        elasticsearch { host => localhost }
        stdout { codec => rubydebug }
}

```

So it seams it's unable to connect to ES server.

So is an internet connection be required always?? I am new to the setup.

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---

<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [July 6, 2017, 12:47am UTC](https://discuss.elastic.co/t/logstash-not-connecting-elasticsearch/20968/2 "2017-07-06T00:47:19Z")

</div>