# Zen unicast discovery -- pulling hair out :-(
**URL:** https://discuss.elastic.co/t/zen-unicast-discovery-pulling-hair-out/7690
**Category:** Elasticsearch
**Created:** [May 14, 2012, 7:04pm UTC](https://discuss.elastic.co/t/zen-unicast-discovery-pulling-hair-out/7690 "2012-05-14T19:04:31Z")
**Posts on this page:** 11
**Page:** 1
### Author:  [@jessejlt](https://discuss.elastic.co/u/jessejlt)
#### Post date: [May 14, 2012, 7:04pm UTC](https://discuss.elastic.co/t/zen-unicast-discovery-pulling-hair-out/7690/1 "2012-05-14T19:04:31Z")
I'm having a difficult time getting two nodes to communicate with each
other using Zen unicast discovery. I've setup a gist at
[https://gist.github.com/2695724](https://gist.github.com/2695724) that describes the issue, shows the
logs, and lists the two machines' configs. Any help is appreciated.
Thanks!
---
### Author:  [@dadoonet](https://discuss.elastic.co/u/dadoonet)
#### Post date: [May 14, 2012, 7:20pm UTC](https://discuss.elastic.co/t/zen-unicast-discovery-pulling-hair-out/7690/2 "2012-05-14T19:20:03Z")
Not sure but you should add your slave and your master in both nodes config files.
discovery.zen.ping.unicast.hosts: ["153.32.228.250:9300","theothernode:9300"]
HTH
David
Le 14 mai 2012 à 21:04, jessejlt [jessejlt@gmail.com](mailto:jessejlt@gmail.com) a écrit :
> I'm having a difficult time getting two nodes to communicate with each
> other using Zen unicast discovery. I've setup a gist at
> [ElasticSearch zen unicast discovery · GitHub](https://gist.github.com/2695724) that describes the issue, shows the
> logs, and lists the two machines' configs. Any help is appreciated.
> Thanks!
---
### Author:  [@Mohit\_Chawla](https://discuss.elastic.co/u/Mohit_Chawla)
#### Post date: [May 14, 2012, 7:22pm UTC](https://discuss.elastic.co/t/zen-unicast-discovery-pulling-hair-out/7690/3 "2012-05-14T19:22:43Z")
discovery.zen.ping.unicast.hosts should've both hosts in both the
config files, I guess.
On Tue, May 15, 2012 at 12:34 AM, jessejlt [jessejlt@gmail.com](mailto:jessejlt@gmail.com) wrote:
> I'm having a difficult time getting two nodes to communicate with each
> other using Zen unicast discovery. I've setup a gist at
> [ElasticSearch zen unicast discovery · GitHub](https://gist.github.com/2695724) that describes the issue, shows the
> logs, and lists the two machines' configs. Any help is appreciated.
> Thanks!
---
### Author:  [@kimchy](https://discuss.elastic.co/u/kimchy)
#### Post date: [May 15, 2012, 8:52pm UTC](https://discuss.elastic.co/t/zen-unicast-discovery-pulling-hair-out/7690/4 "2012-05-15T20:52:39Z")
Can you post the full log of both the first node in the cluster, and the
new node that you are brining up?
On Mon, May 14, 2012 at 10:04 PM, jessejlt [jessejlt@gmail.com](mailto:jessejlt@gmail.com) wrote:
> I'm having a difficult time getting two nodes to communicate with each
> other using Zen unicast discovery. I've setup a gist at
> [ElasticSearch zen unicast discovery · GitHub](https://gist.github.com/2695724) that describes the issue, shows the
> logs, and lists the two machines' configs. Any help is appreciated.
> Thanks!
---
### Author:  [@jessejlt](https://discuss.elastic.co/u/jessejlt)
#### Post date: [June 4, 2012, 8:55pm UTC](https://discuss.elastic.co/t/zen-unicast-discovery-pulling-hair-out/7690/5 "2012-06-04T20:55:57Z")
I've updated the discovery hosts to include both the primary and new
node: [ElasticSearch zen unicast discovery · GitHub](https://gist.github.com/2695724#file_master.yml)
I turned on discovery trace logging and posted the logs for both nodes
at: [ElasticSearch zen unicast discovery · GitHub](https://gist.github.com/2695724#gistcomment-342383)
Thanks!
-jesse
On May 15, 1:52 pm, Shay Banon [kim...@gmail.com](mailto:kim...@gmail.com) wrote:
> Can you post the full log of both the first node in the cluster, and the
> new node that you are brining up?
>
> On Mon, May 14, 2012 at 10:04 PM, jessejlt [jesse...@gmail.com](mailto:jesse...@gmail.com) wrote:
>
> > I'm having a difficult time getting two nodes to communicate with each
> > other using Zen unicast discovery. I've setup a gist at
> > [https://gist.github.com/2695724that](https://gist.github.com/2695724that) describes the issue, shows the
> > logs, and lists the two machines' configs. Any help is appreciated.
> > Thanks!
---
### Author:  [@jagdeep](https://discuss.elastic.co/u/jagdeep)
#### Post date: [June 5, 2012, 5:14am UTC](https://discuss.elastic.co/t/zen-unicast-discovery-pulling-hair-out/7690/6 "2012-06-05T05:14:40Z")
I have similar master slave configuration and it works well for me. I
have given IP addresses in both ymls, so configuration wise i dont see
any issue. Can you try to increase ping time out.. in case any network
latency is there..
Regards
Jagdeep
On Jun 5, 1:55 am, jessejlt [jesse...@gmail.com](mailto:jesse...@gmail.com) wrote:
> I've updated the discovery hosts to include both the primary and new
> node:[ElasticSearch zen unicast discovery · GitHub](https://gist.github.com/2695724#file_master.yml)
> I turned on discovery trace logging and posted the logs for both nodes
> at:[ElasticSearch zen unicast discovery · GitHub](https://gist.github.com/2695724#gistcomment-342383)
>
> Thanks!
> -jesse
>
> On May 15, 1:52 pm, Shay Banon [kim...@gmail.com](mailto:kim...@gmail.com) wrote:
>
> > Can you post the full log of both the first node in the cluster, and the
> > new node that you are brining up?
>
> > On Mon, May 14, 2012 at 10:04 PM, jessejlt [jesse...@gmail.com](mailto:jesse...@gmail.com) wrote:
> >
> > > I'm having a difficult time getting two nodes to communicate with each
> > > other using Zen unicast discovery. I've setup a gist at
> > > [https://gist.github.com/2695724thatdescribes](https://gist.github.com/2695724thatdescribes) the issue, shows the
> > > logs, and lists the two machines' configs. Any help is appreciated.
> > > Thanks!
---
### Author:  [@Igor\_Motov](https://discuss.elastic.co/u/Igor_Motov)
#### Post date: [June 5, 2012, 1:32pm UTC](https://discuss.elastic.co/t/zen-unicast-discovery-pulling-hair-out/7690/7 "2012-06-05T13:32:25Z")
Jesse,
You are running elasticsearch version 0.18.7 on master and version 0.19.3
on media-slave. You cannot combine nodes with different elasticsearch
versions into a single cluster.
Igor
On Tuesday, June 5, 2012 1:14:40 AM UTC-4, jagdeep wrote:
> I have similar master slave configuration and it works well for me. I
> have given IP addresses in both ymls, so configuration wise i dont see
> any issue. Can you try to increase ping time out.. in case any network
> latency is there..
>
> Regards
> Jagdeep
>
> On Jun 5, 1:55 am, jessejlt [jesse...@gmail.com](mailto:jesse...@gmail.com) wrote:
>
> > I've updated the discovery hosts to include both the primary and new
> > node:[ElasticSearch zen unicast discovery · GitHub](https://gist.github.com/2695724#file_master.yml)
> > I turned on discovery trace logging and posted the logs for both nodes
> > at:[ElasticSearch zen unicast discovery · GitHub](https://gist.github.com/2695724#gistcomment-342383)
> >
> > Thanks!
> > -jesse
> >
> > On May 15, 1:52 pm, Shay Banon [kim...@gmail.com](mailto:kim...@gmail.com) wrote:
> >
> > > Can you post the full log of both the first node in the cluster, and
> > > the
> > > new node that you are brining up?
> >
> > > On Mon, May 14, 2012 at 10:04 PM, jessejlt [jesse...@gmail.com](mailto:jesse...@gmail.com)
> > > wrote:
> > >
> > > > I'm having a difficult time getting two nodes to communicate with
> > > > each
> > > > other using Zen unicast discovery. I've setup a gist at
> > > > [https://gist.github.com/2695724thatdescribes](https://gist.github.com/2695724thatdescribes) the issue, shows the
> > > > logs, and lists the two machines' configs. Any help is appreciated.
> > > > Thanks!
---
### Author:  [@kimchy](https://discuss.elastic.co/u/kimchy)
#### Post date: [June 10, 2012, 9:03pm UTC](https://discuss.elastic.co/t/zen-unicast-discovery-pulling-hair-out/7690/8 "2012-06-10T21:03:57Z")
It seems like what you call the slave node (bad naming by the way, there
isn't really a slave in elasticsearch cluster model) send ping requests but
receives no responses, so it elects itself as master. Can set discovery
logging to TRACE? I am missing some logging elements where it shows which
addresses it tries to ping. Also, can you remove the [9300-9400] part, and
just use host? It will use the proper port number automatically.
On Mon, Jun 4, 2012 at 10:55 PM, jessejlt [jessejlt@gmail.com](mailto:jessejlt@gmail.com) wrote:
> I've updated the discovery hosts to include both the primary and new
> node: [ElasticSearch zen unicast discovery · GitHub](https://gist.github.com/2695724#file_master.yml)
> I turned on discovery trace logging and posted the logs for both nodes
> at: [ElasticSearch zen unicast discovery · GitHub](https://gist.github.com/2695724#gistcomment-342383)
>
> Thanks!
> -jesse
>
> On May 15, 1:52 pm, Shay Banon [kim...@gmail.com](mailto:kim...@gmail.com) wrote:
>
> > Can you post the full log of both the first node in the cluster, and the
> > new node that you are brining up?
> >
> > On Mon, May 14, 2012 at 10:04 PM, jessejlt [jesse...@gmail.com](mailto:jesse...@gmail.com) wrote:
> >
> > > I'm having a difficult time getting two nodes to communicate with each
> > > other using Zen unicast discovery. I've setup a gist at
> > > [https://gist.github.com/2695724that](https://gist.github.com/2695724that) describes the issue, shows the
> > > logs, and lists the two machines' configs. Any help is appreciated.
> > > Thanks!
---
### Author:  [@AndreyTonteey13](https://discuss.elastic.co/u/AndreyTonteey13)
#### Post date: [October 24, 2013, 10:23am UTC](https://discuss.elastic.co/t/zen-unicast-discovery-pulling-hair-out/7690/9 "2013-10-24T10:23:37Z")
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### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [July 6, 2017, 1:49am UTC](https://discuss.elastic.co/t/zen-unicast-discovery-pulling-hair-out/7690/11 "2017-07-06T01:49:11Z")