# System getting stuck using elastic search

**URL:** <https://discuss.elastic.co/t/system-getting-stuck-using-elastic-search/7418>\
**Category:** Elasticsearch\
**Created:** [April 20, 2012, 10:07am UTC](https://discuss.elastic.co/t/system-getting-stuck-using-elastic-search/7418 "2012-04-20T10:07:07Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![Prashanth](https://avatars.discourse-cdn.com/v4/letter/p/439d5e/32.png) [@Prashanth](https://discuss.elastic.co/u/Prashanth)\
**Post date:** [April 20, 2012, 10:07am UTC](https://discuss.elastic.co/t/system-getting-stuck-using-elastic-search/7418/1 "2012-04-20T10:07:07Z")

</div>

Hi all,

```
    We are getting a strange issue when we use the elastic search

```

in our systems. Following is the exception which is thrown ..

```
    I have Singleton Transport Client instance which is

```

instantiated at the server startup . Have set the openfiles setting  
to unlimited . But still we are getting the following error.  
Application server is not responding because of this issue and we had  
to restart all the servers. This issue coming most of the times so we  
had to switch off the elastic search for now to carry on normal  
process

```
  Your help is highly appreciated.

```

Thanks,  
Prashanth

WARN org.elasticsearch.transport.netty - [Tzabaoth] Exception caught  
on netty layer [[id: 0x31ed2fda]]  
org.elasticsearch.common.netty.channel.ChannelException: Failed to  
create a selector.  
at  
org.elasticsearch.common.netty.channel.socket.nio.NioClientSocketPipelineSink  
$Boss.register(NioClientSocketPipelineSink.java:206)  
at  
org.elasticsearch.common.netty.channel.socket.nio.NioClientSocketPipelineSink.connect(NioClientSocketPipelineSink.java:  
163)  
at  
org.elasticsearch.common.netty.channel.socket.nio.NioClientSocketPipelineSink.eventSunk(NioClientSocketPipelineSink.java:  
113)  
at  
org.elasticsearch.common.netty.channel.DefaultChannelPipeline.sendDownstream(DefaultChannelPipeline.java:  
574)  
at  
org.elasticsearch.common.netty.channel.Channels.connect(Channels.java:  
541)  
at  
org.elasticsearch.common.netty.channel.AbstractChannel.connect(AbstractChannel.java:  
210)  
at  
org.elasticsearch.common.netty.bootstrap.ClientBootstrap.connect(ClientBootstrap.java:  
227)  
at  
org.elasticsearch.common.netty.bootstrap.ClientBootstrap.connect(ClientBootstrap.java:  
188)  
at  
org.elasticsearch.transport.netty.NettyTransport.connectToChannels(NettyTransport.java:  
550)  
at  
org.elasticsearch.transport.netty.NettyTransport.connectToNode(NettyTransport.java:  
503)  
at  
org.elasticsearch.transport.netty.NettyTransport.connectToNode(NettyTransport.java:  
482)  
at  
org.elasticsearch.transport.TransportService.connectToNode(TransportService.java:  
124)  
at org.elasticsearch.client.transport.TransportClientNodesService  
$SimpleNodeSampler.sample(TransportClientNodesService.java:262)  
at org.elasticsearch.client.transport.TransportClientNodesService  
$ScheduledNodeSampler.run(TransportClientNodesService.java:245)  
at java.util.concurrent.ThreadPoolExecutor  
$Worker.runTask(ThreadPoolExecutor.java:886)  
at java.util.concurrent.ThreadPoolExecutor  
$Worker.run(ThreadPoolExecutor.java:908)  
at java.lang.Thread.run(Thread.java:662)  
Caused by: java.io.IOException: Too many open files  
at sun.nio.ch.IOUtil.initPipe(Native Method)  
at sun.nio.ch.EPollSelectorImpl.(EPollSelectorImpl.java:49)  
at  
sun.nio.ch.EPollSelectorProvider.openSelector(EPollSelectorProvider.java:  
18)  
at java.nio.channels.Selector.open(Selector.java:209)  
at  
org.elasticsearch.common.netty.channel.socket.nio.NioClientSocketPipelineSink  
$Boss.register(NioClientSocketPipelineSink.java:204)  
... 16 more  
2012-04-18 15:42:31,074 [elasticsearch[cached]-pool-1805-thread-1]  
(Log4jESLogger.java:105) WARN org.elasticsearch.transport.netty -  
[Tzabaoth] Exception caught on netty layer [[id: 0x4ae0aad1]]  
org.elasticsearch.common.netty.channel.ChannelException: Failed to  
create a selector.  
at  
org.elasticsearch.common.netty.channel.socket.nio.NioClientSocketPipelineSink  
$Boss.register(NioClientSocketPipelineSink.java:206)  
at  
org.elasticsearch.common.netty.channel.socket.nio.NioClientSocketPipelineSink.connect(NioClientSocketPipelineSink.java:  
163)  
at  
org.elasticsearch.common.netty.channel.socket.nio.NioClientSocketPipelineSink.eventSunk(NioClientSocketPipelineSink.java:  
113)  
at  
org.elasticsearch.common.netty.channel.DefaultChannelPipeline.sendDownstream(DefaultChannelPipeline.java:  
574)  
at  
org.elasticsearch.common.netty.channel.Channels.connect(Channels.java:  
541)  
at  
org.elasticsearch.common.netty.channel.AbstractChannel.connect(AbstractChannel.java:  
210)  
at  
org.elasticsearch.common.netty.bootstrap.ClientBootstrap.connect(ClientBootstrap.java:  
227)  
at  
org.elasticsearch.common.netty.bootstrap.ClientBootstrap.connect(ClientBootstrap.java:  
188)  
at  
org.elasticsearch.transport.netty.NettyTransport.connectToChannels(NettyTransport.java:  
550)  
at  
org.elasticsearch.transport.netty.NettyTransport.connectToNode(NettyTransport.java:  
503)  
at  
org.elasticsearch.transport.netty.NettyTransport.connectToNode(NettyTransport.java:  
482)  
at  
org.elasticsearch.transport.TransportService.connectToNode(TransportService.java:  
124)  
at org.elasticsearch.client.transport.TransportClientNodesService  
$SimpleNodeSampler.sample(TransportClientNodesService.java:262)  
at org.elasticsearch.client.transport.TransportClientNodesService  
$ScheduledNodeSampler.run(TransportClientNodesService.java:245)  
at java.util.concurrent.ThreadPoolExecutor  
$Worker.runTask(ThreadPoolExecutor.java:886)  
at java.util.concurrent.ThreadPoolExecutor  
$Worker.run(ThreadPoolExecutor.java:908)  
at java.lang.Thread.run(Thread.java:662)  
Caused by: java.io.IOException: Too many open files  
at sun.nio.ch.IOUtil.initPipe(Native Method)  
at sun.nio.ch.EPollSelectorImpl.(EPollSelectorImpl.java:49)  
at  
sun.nio.ch.EPollSelectorProvider.openSelector(EPollSelectorProvider.java:  
18)  
at java.nio.channels.Selector.open(Selector.java:209)  
at  
org.elasticsearch.common.netty.channel.socket.nio.NioClientSocketPipelineSink  
$Boss.register(NioClientSocketPipelineSink.java:204)  
... 16 more

---

<div class="post-metadata">

**Author:** ![kimchy](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/kimchy/32/44952_2.png) [@kimchy](https://discuss.elastic.co/u/kimchy)\
**Post date:** [April 21, 2012, 2:56pm UTC](https://discuss.elastic.co/t/system-getting-stuck-using-elastic-search/7418/2 "2012-04-21T14:56:58Z")

</div>

it seems like the open files limit has not been set correctly...

On Fri, Apr 20, 2012 at 1:07 PM, Prashanth [prashanth.byrapu@gmail.com](mailto:prashanth.byrapu@gmail.com)wrote:

> Hi all,
> 
> ```
> We are getting a strange issue when we use the elastic search
> 
> ```
> 
> in our systems. Following is the exception which is thrown ..
> 
> ```
> I have Singleton Transport Client instance which is
> 
> ```
> 
> instantiated at the server startup . Have set the openfiles setting  
> to unlimited . But still we are getting the following error.  
> Application server is not responding because of this issue and we had  
> to restart all the servers. This issue coming most of the times so we  
> had to switch off the Elasticsearch for now to carry on normal  
> process
> 
> ```
> Your help is highly appreciated.
> 
> ```
> 
> Thanks,  
> Prashanth
> 
> WARN org.elasticsearch.transport.netty - [Tzabaoth] Exception caught  
> on netty layer [[id: 0x31ed2fda]]  
> org.elasticsearch.common.netty.channel.ChannelException: Failed to  
> create a selector.  
> at
> 
> org.elasticsearch.common.netty.channel.socket.nio.NioClientSocketPipelineSink  
> $Boss.register(NioClientSocketPipelineSink.java:206)  
> at
> 
> org.elasticsearch.common.netty.channel.socket.nio.NioClientSocketPipelineSink.connect(NioClientSocketPipelineSink.java:  
> 163)  
> at
> 
> org.elasticsearch.common.netty.channel.socket.nio.NioClientSocketPipelineSink.eventSunk(NioClientSocketPipelineSink.java:  
> 113)  
> at
> 
> org.elasticsearch.common.netty.channel.DefaultChannelPipeline.sendDownstream(DefaultChannelPipeline.java:  
> 574)  
> at  
> org.elasticsearch.common.netty.channel.Channels.connect(Channels.java:  
> 541)  
> at
> 
> org.elasticsearch.common.netty.channel.AbstractChannel.connect(AbstractChannel.java:  
> 210)  
> at
> 
> org.elasticsearch.common.netty.bootstrap.ClientBootstrap.connect(ClientBootstrap.java:  
> 227)  
> at
> 
> org.elasticsearch.common.netty.bootstrap.ClientBootstrap.connect(ClientBootstrap.java:  
> 188)  
> at
> 
> org.elasticsearch.transport.netty.NettyTransport.connectToChannels(NettyTransport.java:  
> 550)  
> at
> 
> org.elasticsearch.transport.netty.NettyTransport.connectToNode(NettyTransport.java:  
> 503)  
> at
> 
> org.elasticsearch.transport.netty.NettyTransport.connectToNode(NettyTransport.java:  
> 482)  
> at
> 
> org.elasticsearch.transport.TransportService.connectToNode(TransportService.java:  
> 124)  
> at org.elasticsearch.client.transport.TransportClientNodesService  
> $SimpleNodeSampler.sample(TransportClientNodesService.java:262)  
> at org.elasticsearch.client.transport.TransportClientNodesService  
> $ScheduledNodeSampler.run(TransportClientNodesService.java:245)  
> at java.util.concurrent.ThreadPoolExecutor  
> $Worker.runTask(ThreadPoolExecutor.java:886)  
> at java.util.concurrent.ThreadPoolExecutor  
> $Worker.run(ThreadPoolExecutor.java:908)  
> at java.lang.Thread.run(Thread.java:662)  
> Caused by: java.io.IOException: Too many open files  
> at sun.nio.ch.IOUtil.initPipe(Native Method)  
> at sun.nio.ch.EPollSelectorImpl.(EPollSelectorImpl.java:49)  
> at  
> sun.nio.ch.EPollSelectorProvider.openSelector(EPollSelectorProvider.java:  
> 18)  
> at java.nio.channels.Selector.open(Selector.java:209)  
> at
> 
> org.elasticsearch.common.netty.channel.socket.nio.NioClientSocketPipelineSink  
> $Boss.register(NioClientSocketPipelineSink.java:204)  
> ... 16 more  
> 2012-04-18 15:42:31,074 [elasticsearch[cached]-pool-1805-thread-1]  
> (Log4jESLogger.java:105) WARN org.elasticsearch.transport.netty -  
> [Tzabaoth] Exception caught on netty layer [[id: 0x4ae0aad1]]  
> org.elasticsearch.common.netty.channel.ChannelException: Failed to  
> create a selector.  
> at
> 
> org.elasticsearch.common.netty.channel.socket.nio.NioClientSocketPipelineSink  
> $Boss.register(NioClientSocketPipelineSink.java:206)  
> at
> 
> org.elasticsearch.common.netty.channel.socket.nio.NioClientSocketPipelineSink.connect(NioClientSocketPipelineSink.java:  
> 163)  
> at
> 
> org.elasticsearch.common.netty.channel.socket.nio.NioClientSocketPipelineSink.eventSunk(NioClientSocketPipelineSink.java:  
> 113)  
> at
> 
> org.elasticsearch.common.netty.channel.DefaultChannelPipeline.sendDownstream(DefaultChannelPipeline.java:  
> 574)  
> at  
> org.elasticsearch.common.netty.channel.Channels.connect(Channels.java:  
> 541)  
> at
> 
> org.elasticsearch.common.netty.channel.AbstractChannel.connect(AbstractChannel.java:  
> 210)  
> at
> 
> org.elasticsearch.common.netty.bootstrap.ClientBootstrap.connect(ClientBootstrap.java:  
> 227)  
> at
> 
> org.elasticsearch.common.netty.bootstrap.ClientBootstrap.connect(ClientBootstrap.java:  
> 188)  
> at
> 
> org.elasticsearch.transport.netty.NettyTransport.connectToChannels(NettyTransport.java:  
> 550)  
> at
> 
> org.elasticsearch.transport.netty.NettyTransport.connectToNode(NettyTransport.java:  
> 503)  
> at
> 
> org.elasticsearch.transport.netty.NettyTransport.connectToNode(NettyTransport.java:  
> 482)  
> at
> 
> org.elasticsearch.transport.TransportService.connectToNode(TransportService.java:  
> 124)  
> at org.elasticsearch.client.transport.TransportClientNodesService  
> $SimpleNodeSampler.sample(TransportClientNodesService.java:262)  
> at org.elasticsearch.client.transport.TransportClientNodesService  
> $ScheduledNodeSampler.run(TransportClientNodesService.java:245)  
> at java.util.concurrent.ThreadPoolExecutor  
> $Worker.runTask(ThreadPoolExecutor.java:886)  
> at java.util.concurrent.ThreadPoolExecutor  
> $Worker.run(ThreadPoolExecutor.java:908)  
> at java.lang.Thread.run(Thread.java:662)  
> Caused by: java.io.IOException: Too many open files  
> at sun.nio.ch.IOUtil.initPipe(Native Method)  
> at sun.nio.ch.EPollSelectorImpl.(EPollSelectorImpl.java:49)  
> at  
> sun.nio.ch.EPollSelectorProvider.openSelector(EPollSelectorProvider.java:  
> 18)  
> at java.nio.channels.Selector.open(Selector.java:209)  
> at
> 
> org.elasticsearch.common.netty.channel.socket.nio.NioClientSocketPipelineSink  
> $Boss.register(NioClientSocketPipelineSink.java:204)  
> ... 16 more

---

<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, 3:31am UTC](https://discuss.elastic.co/t/system-getting-stuck-using-elastic-search/7418/3 "2017-07-06T03:31:29Z")

</div>