# Error "lumberjack All host unavailable, sleeping" when Logstash-to-Logstash communication is configured
**URL:** https://discuss.elastic.co/t/error-lumberjack-all-host-unavailable-sleeping-when-logstash-to-logstash-communication-is-configured/184918
**Category:** Logstash
**Created:** [June 10, 2019, 5:15am UTC](https://discuss.elastic.co/t/error-lumberjack-all-host-unavailable-sleeping-when-logstash-to-logstash-communication-is-configured/184918 "2019-06-10T05:15:32Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@garima](https://discuss.elastic.co/u/garima)
#### Post date: [June 10, 2019, 5:15am UTC](https://discuss.elastic.co/t/error-lumberjack-all-host-unavailable-sleeping-when-logstash-to-logstash-communication-is-configured/184918/1 "2019-06-10T05:15:32Z")
Logstash Version: 6.4.1
Use case: Logstash-to-Logstash Communication
Upstream hostname : node-1 (IP 172.30.64.98)
Downstream hostname : node-2 (IP 172.30.64.115)
In /etc/hosts both hostname are already mentioned and both hosts are accessible by each other.
Execution Steps:
1. Generate a trusted SSL certificate under /usr/share/logstash/bin in Upstream host
`# openssl req -x509 -batch -nodes -newkey rsa:2048 -keyout lumberjack.key -out lumberjack.cert -subj /CN=node1`
2. Copy the SSL certificate and key to the downstream Logstash machine
`# scp /usr/share/logstash/bin/lumberjack.* root@node2:/usr/share/logstash/bin`
3. Start the downstream logstash instance
`# cd /usr/share/logstash/bin`
`# ./logstash -e 'input { beats { codec => json port => 5000 ssl => true ssl_certificate => "lumberjack.cert" ssl_key => "lumberjack.key"} }'`
4. Start the upstream logstash instance
`# cd /usr/share/logstash/bin`
`# ./logstash -e 'input { generator { count => 5 } } output { lumberjack { codec => json hosts => "mydownstreamhost" ssl_certificate => "lumberjack.cert" port => 5000 } }'`
During the Starting of upstream logstance instance I am getting below error
**[ERROR] 2019-05-07 12:16:49.471 [[main]-pipeline-manager] lumberjack - All hosts unavailable, sleeping {:hosts=\>["172.30.64.115"], :e=\>#\, :**
Is there any specific solution to resolve this error ?
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### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [July 8, 2019, 5:15am UTC](https://discuss.elastic.co/t/error-lumberjack-all-host-unavailable-sleeping-when-logstash-to-logstash-communication-is-configured/184918/2 "2019-07-08T05:15:34Z")
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