# Elasticsearch network host cant be set?
**URL:** https://discuss.elastic.co/t/elasticsearch-network-host-cant-be-set/55596
**Category:** Elasticsearch
**Created:** [July 15, 2016, 7:44am UTC](https://discuss.elastic.co/t/elasticsearch-network-host-cant-be-set/55596 "2016-07-15T07:44:14Z")
**Posts on this page:** 11
**Page:** 1
### Author:  [@Kennedy\_Kan1](https://discuss.elastic.co/u/Kennedy_Kan1)
#### Post date: [July 15, 2016, 7:44am UTC](https://discuss.elastic.co/t/elasticsearch-network-host-cant-be-set/55596/1 "2016-07-15T07:44:14Z")
I have downloaded ES and configure the yml file for network host to be 0.0.0.0. Then when I start it up with **bin/elasticsearch** , it gives me the following error.
```
172.16.1.237:9300}, bound_addresses {[::]:9300}
Exception in thread "main" java.lang.RuntimeException: bootstrap checks failed
initial heap size [268435456] not equal to maximum heap size [2147483648]; this can cause resize pauses and prevents mlockall from locking the entire heap
max file descriptors [4096] for elasticsearch process likely too low, increase to at least [65536]
please set [discovery.zen.minimum_master_nodes] to a majority of the number of master eligible nodes in your cluster
max virtual memory areas vm.max_map_count [65530] likely too low, increase to at least [262144]
at org.elasticsearch.bootstrap.BootstrapCheck.check(BootstrapCheck.java:125)
at org.elasticsearch.bootstrap.BootstrapCheck.check(BootstrapCheck.java:85)
at org.elasticsearch.bootstrap.BootstrapCheck.check(BootstrapCheck.java:65)
at org.elasticsearch.bootstrap.Bootstrap$5.validateNodeBeforeAcceptingRequests(Bootstrap.java:178)
at org.elasticsearch.node.Node.start(Node.java:373)
at org.elasticsearch.bootstrap.Bootstrap.start(Bootstrap.java:193)
at org.elasticsearch.bootstrap.Bootstrap.init(Bootstrap.java:252)
at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:96)
at org.elasticsearch.bootstrap.Elasticsearch.execute(Elasticsearch.java:91)
at org.elasticsearch.cli.SettingCommand.execute(SettingCommand.java:54)
at org.elasticsearch.cli.Command.mainWithoutErrorHandling(Command.java:91)
at org.elasticsearch.cli.Command.main(Command.java:53)
at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:70)
at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:63)
Refer to the log for complete error details.
```
What would be the issue?
---
### Author:  [@warkolm](https://discuss.elastic.co/u/warkolm)
#### Post date: [July 15, 2016, 7:46am UTC](https://discuss.elastic.co/t/elasticsearch-network-host-cant-be-set/55596/2 "2016-07-15T07:46:30Z")
> [@Kennedy\_Kan1](#):
>
> bootstrap checks failed
> initial heap size [268435456] not equal to maximum heap size [2147483648]; this can cause resize pauses and prevents mlockall from locking the entire heap
> max file descriptors [4096] for elasticsearch process likely too low, increase to at least [65536]
> please set [discovery.zen.minimum\_master\_nodes] to a majority of the number of master eligible nodes in your cluster
> max virtual memory areas vm.max\_map\_count [65530] likely too low, increase to at least [262144]
You read all of that right?
---
### Author:  [@Kennedy\_Kan1](https://discuss.elastic.co/u/Kennedy_Kan1)
#### Post date: [July 15, 2016, 7:48am UTC](https://discuss.elastic.co/t/elasticsearch-network-host-cant-be-set/55596/3 "2016-07-15T07:48:02Z")
Hi @warkolm,
Yes, but I could not understand its relationship when I have set the network.host to 0.0.0.0. When I comment it out, ES works again. This is the first time I come across with these events and I am not familiar with what they mean.
---
### Author:  [@es\_yong](https://discuss.elastic.co/u/es_yong)
#### Post date: [July 15, 2016, 10:12am UTC](https://discuss.elastic.co/t/elasticsearch-network-host-cant-be-set/55596/4 "2016-07-15T10:12:06Z")
which version are you using? could you paste your es config file?
---
### Author:  [@Kennedy\_Kan1](https://discuss.elastic.co/u/Kennedy_Kan1)
#### Post date: [July 15, 2016, 10:15am UTC](https://discuss.elastic.co/t/elasticsearch-network-host-cant-be-set/55596/5 "2016-07-15T10:15:39Z")
I am using ES 5 Alpha 4.
Here is my es config file: [http://paste.ubuntu.com/19478337/](http://paste.ubuntu.com/19478337/)
---
### Author:  [@es\_yong](https://discuss.elastic.co/u/es_yong)
#### Post date: [July 15, 2016, 10:20am UTC](https://discuss.elastic.co/t/elasticsearch-network-host-cant-be-set/55596/6 "2016-07-15T10:20:48Z")
😰 I didn't use this version, since it's not free. In ES 2.x, these messages are WARN, so it can be startup success. there is a section of ES document include how to increase heap size and max file descriptors.
---
### Author:  [@es\_yong](https://discuss.elastic.co/u/es_yong)
#### Post date: [July 15, 2016, 10:26am UTC](https://discuss.elastic.co/t/elasticsearch-network-host-cant-be-set/55596/7 "2016-07-15T10:26:30Z")
They are here:
[https://www.elastic.co/guide/en/elasticsearch/guide/current/heap-sizing.html](https://www.elastic.co/guide/en/elasticsearch/guide/current/heap-sizing.html)
[https://www.elastic.co/guide/en/elasticsearch/guide/current/\_file\_descriptors\_and\_mmap.html](https://www.elastic.co/guide/en/elasticsearch/guide/current/_file_descriptors_and_mmap.html)
---
### Author:  [@warkolm](https://discuss.elastic.co/u/warkolm)
#### Post date: [July 15, 2016, 10:58am UTC](https://discuss.elastic.co/t/elasticsearch-network-host-cant-be-set/55596/8 "2016-07-15T10:58:33Z")
> [@es\_yong](#):
>
> I didn't use this version, since it's not free.
Huh?
Yes, it is.
---
### Author:  [@peterkimnyc](https://discuss.elastic.co/u/peterkimnyc)
#### Post date: [July 21, 2016, 3:34pm UTC](https://discuss.elastic.co/t/elasticsearch-network-host-cant-be-set/55596/9 "2016-07-21T15:34:51Z")
I just ran into this error too. Looking at the code, it looks like once you decide to explicitly set network.host, we assume you're doing this because you've moved beyond a simple dev instance and are setting up something that's more production-like.
Since we are assuming this is now a production-like environment, we now enforce some of these checks that we otherwise wouldn't in a simple dev installation.
>
Hope that helps,
Peter
---
### Author:  [@peterkimnyc](https://discuss.elastic.co/u/peterkimnyc)
#### Post date: [July 21, 2016, 3:39pm UTC](https://discuss.elastic.co/t/elasticsearch-network-host-cant-be-set/55596/10 "2016-07-21T15:39:28Z")
Looks like this is already even documented in master! 🙂
[https://www.elastic.co/guide/en/elasticsearch/reference/master/bootstrap-checks.html](https://www.elastic.co/guide/en/elasticsearch/reference/master/bootstrap-checks.html)
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [July 5, 2017, 10:33pm UTC](https://discuss.elastic.co/t/elasticsearch-network-host-cant-be-set/55596/11 "2017-07-05T22:33:38Z")