# Logstash error while executing

**URL:** <https://discuss.elastic.co/t/logstash-error-while-executing/113266>\
**Category:** Logstash\
**Created:** [December 27, 2017, 5:28am UTC](https://discuss.elastic.co/t/logstash-error-while-executing/113266 "2017-12-27T05:28:34Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![syed](https://avatars.discourse-cdn.com/v4/letter/s/a88e57/32.png) [@syed](https://discuss.elastic.co/u/syed)\
**Post date:** [December 27, 2017, 5:28am UTC](https://discuss.elastic.co/t/logstash-error-while-executing/113266/1 "2017-12-27T05:28:34Z")

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Dear Team,

we received below error when we are executing logstash. "we have a trail license till 9th of jan 2018"

[ERROR][logstash.licensechecker.licensemanager] Unable to retrieve license information from license server {:message=\>"Elasticsearch Unreachable: [[http://localhost:9200/](http://localhost:9200/)][Manticore::SocketException] Connection refused (Connection refused)", :class=\>"LogStash::Outputs::ElasticSearch::HttpClient::Pool::HostUnreachableError"}  
[2017-12-27T08:21:55,985][WARN][logstash.licensechecker.xpackinfo] Nil response from License Server  
[2017-12-27T08:21:56,044][INFO][logstash.pipeline] Pipeline started {"[pipeline.id](http://pipeline.id)"=\>".monitoring-logstash"}  
[2017-12-27T08:21:57,183][INFO][logstash.outputs.elasticsearch] Elasticsearch pool URLs updated {:changes=\>{:removed=\>[], :added=\>[[http://logstash\_system:xxxxxx@dcvels01.warbabank.com:9200/](http://logstash_system:xxxxxx@dcvels01.warbabank.com:9200/)]}}  
[2017-12-27T08:21:57,185][INFO][logstash.outputs.elasticsearch] Running health check to see if an Elasticsearch connection is working {:healthcheck\_url=\>[http://logstash\_system:xxxxxx@dcvels01.warbabank.com:9200/](http://logstash_system:xxxxxx@dcvels01.warbabank.com:9200/), :path=\>"/"}  
[2017-12-27T08:21:57,396][WARN][logstash.outputs.elasticsearch] Attempted to resurrect connection to dead ES instance, but got an error. {:url=\>"[http://logstash\_system:xxxxxx@dcvels01.warbabank.com:9200/](http://logstash_system:xxxxxx@dcvels01.warbabank.com:9200/)", :error\_type=\>LogStash::Outputs::ElasticSearch::HttpClient::Pool::BadResponseCodeError, :error=\>"Got response code '503' contacting Elasticsearch at URL '[http://dcvels01.warbabank.com:9200/](http://dcvels01.warbabank.com:9200/)'"}  
[2017-12-27T08:21:57,397][INFO][logstash.outputs.elasticsearch] Using mapping template from {:path=\>nil}  
[2017-12-27T08:21:57,398][ERROR][logstash.outputs.elasticsearch] Failed to install template. {:message=\>"Template file '' could not be found!", :class=\>"ArgumentError", :backtrace=\>["/home/logstash/logstash-6.0.0/vendor/bundle/jruby/2.3.0/gems/logstash-output-elasticsearch-9.0.0-java/lib/logstash/outputs/elasticsearch/template\_manager.rb:37:in `read_template_file'", "/home/logstash/logstash-6.0.0/vendor/bundle/jruby/2.3.0/gems/logstash-output-elasticsearch-9.0.0-java/lib/logstash/outputs/elasticsearch/template_manager.rb:23:in`get\_template'", "/home/logstash/logstash-6.0.0/vendor/bundle/jruby/2.3.0/gems/logstash-output-elasticsearch-9.0.0-java/lib/logstash/outputs/elasticsearch/template\_manager.rb:7:in `install_template'", "/home/logstash/logstash-6.0.0/vendor/bundle/jruby/2.3.0/gems/logstash-output-elasticsearch-9.0.0-java/lib/logstash/outputs/elasticsearch/common.rb:52:in`install\_template'", "/home/logstash/logstash-6.0.0/vendor/bundle/jruby/2.3.0/gems/logstash-output-elasticsearch-9.0.0-java/lib/logstash/outputs/elasticsearch/common.rb:25:in `register'", "/home/logstash/logstash-6.0.0/logstash-core/lib/logstash/output_delegator_strategies/shared.rb:9:in`register'", "/home/logstash/logstash-6.0.0/logstash-core/lib/logstash/output\_delegator.rb:43:in `register'", "/home/logstash/logstash-6.0.0/logstash-core/lib/logstash/pipeline.rb:388:in`register\_plugin'", "/home/logstash/logstash-6.0.0/logstash-core/lib/logstash/pipeline.rb:399:in `block in register_plugins'", "org/jruby/RubyArray.java:1734:in`each'", "/home/logstash/logstash-6.0.0/logstash-core/lib/logstash/pipeline.rb:399:in `register_plugins'", "/home/logstash/logstash-6.0.0/logstash-core/lib/logstash/pipeline.rb:800:in`maybe\_setup\_out\_plugins'", "/home/logstash/logstash-6.0.0/logstash-core/lib/logstash/pipeline.rb:409:in `start_workers'", "/home/logstash/logstash-6.0.0/logstash-core/lib/logstash/pipeline.rb:333:in`run'", "/home/logstash/logstash-6.0.0/logstash-core/lib/logstash/pipeline.rb:293:in `block in start'"]}

Kindly suggest me on this and guide me to fix this issue.

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**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [January 24, 2018, 5:28am UTC](https://discuss.elastic.co/t/logstash-error-while-executing/113266/2 "2018-01-24T05:28:49Z")

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