# Too Many Files Open - Failed to accept a connection
**URL:** https://discuss.elastic.co/t/too-many-files-open-failed-to-accept-a-connection/38020
**Category:** Elasticsearch
**Created:** [December 28, 2015, 6:27am UTC](https://discuss.elastic.co/t/too-many-files-open-failed-to-accept-a-connection/38020 "2015-12-28T06:27:44Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@binurajps](https://discuss.elastic.co/u/binurajps)
#### Post date: [December 28, 2015, 6:27am UTC](https://discuss.elastic.co/t/too-many-files-open-failed-to-accept-a-connection/38020/1 "2015-12-28T06:27:44Z")
Hello Team,
I am getting following exception while starting elastic search.
In my elastic search configuration elasticsearch.yml is as follows.
bootstrap.mlockall: true
[2015-12-28 15:09:31,323][WARN][netty.channel.socket.nio.AbstractNioSelector] Failed to accept a connection.
java.io.IOException: Too many open files
at sun.nio.ch.ServerSocketChannelImpl.accept0(Native Method)
at sun.nio.ch.ServerSocketChannelImpl.accept(ServerSocketChannelImpl.java:241)
at org.elasticsearch.common.netty.channel.socket.nio.NioServerBoss.process(NioServerBoss.java:100)
at org.elasticsearch.common.netty.channel.socket.nio.AbstractNioSelector.run(AbstractNioSelector.java:337)
at org.elasticsearch.common.netty.channel.socket.nio.NioServerBoss.run(NioServerBoss.java:42)
at org.elasticsearch.common.netty.util.ThreadRenamingRunnable.run(ThreadRenamingRunnable.java:108)
at org.elasticsearch.common.netty.util.internal.DeadLockProofWorker$1.run(DeadLockProofWorker.java:42)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:724)
Please advice.
Regards,
Binuraj
---
### Author:  [@voipoclay](https://discuss.elastic.co/u/voipoclay)
#### Post date: [December 28, 2015, 8:27am UTC](https://discuss.elastic.co/t/too-many-files-open-failed-to-accept-a-connection/38020/2 "2015-12-28T08:27:31Z")
I recommend browsing other similar issues for answers.
[https://discuss.elastic.co/search?q=too%20many%20open%20files](https://discuss.elastic.co/search?q=too%20many%20open%20files)
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [July 5, 2017, 11:28pm UTC](https://discuss.elastic.co/t/too-many-files-open-failed-to-accept-a-connection/38020/3 "2017-07-05T23:28:19Z")