logstash is throwing exception template file not found

Question

I'm trying to install docker-elk stack using docker-compose, elastic search and kibana are working fine, but my logstash is not connecting to elastic search and throwing error shown below, I'm installing this for first time so doesn't have much knowledge about it.

logstash-5-6          | [2017-11-26T06:09:06,455][ERROR][logstash.outputs.elasticsearch] Failed to install template. {:message=>"Template file '' could not be found!", :class=>"ArgumentError", :backtrace=>["/usr/share/logstash/vendor/bundle/jruby/1.9/gems/logstash-output-elasticsearch-7.4.2-java/lib/logstash/outputs/elasticsearch/template_manager.rb:37:in `read_template_file'", "/usr/share/logstash/vendor/bundle/jruby/1.9/gems/logstash-output-elasticsearch-7.4.2-java/lib/logstash/outputs/elasticsearch/template_manager.rb:23:in `get_template'", "/usr/share/logstash/vendor/bundle/jruby/1.9/gems/logstash-output-elasticsearch-7.4.2-java/lib/logstash/outputs/elasticsearch/template_manager.rb:7:in `install_template'", "/usr/share/logstash/vendor/bundle/jruby/1.9/gems/logstash-output-elasticsearch-7.4.2-java/lib/logstash/outputs/elasticsearch/common.rb:58:in `install_template'", "/usr/share/logstash/vendor/bundle/jruby/1.9/gems/logstash-output-elasticsearch-7.4.2-java/lib/logstash/outputs/elasticsearch/common.rb:25:in `register'", "/usr/share/logstash/logstash-core/lib/logstash/output_delegator_strategies/shared.rb:9:in `register'", "/usr/share/logstash/logstash-core/lib/logstash/output_delegator.rb:43:in `register'", "/usr/share/logstash/logstash-core/lib/logstash/pipeline.rb:290:in `register_plugin'", "/usr/share/logstash/logstash-core/lib/logstash/pipeline.rb:301:in `register_plugins'", "org/jruby/RubyArray.java:1613:in `each'", "/usr/share/logstash/logstash-core/lib/logstash/pipeline.rb:301:in `register_plugins'", "/usr/share/logstash/logstash-core/lib/logstash/pipeline.rb:310:in `start_workers'", "/usr/share/logstash/logstash-core/lib/logstash/pipeline.rb:235:in `run'", "/usr/share/logstash/logstash-core/lib/logstash/agent.rb:398:in `start_pipeline'"]}
logstash-5-6          | [2017-11-26T06:09:06,455][INFO ][logstash.outputs.elasticsearch] New Elasticsearch output {:class=>"LogStash::Outputs::ElasticSearch", :hosts=>["//elasticsearch-5-6:9201"]}

Logstash.conf

input {
    tcp {
        port => 5001
    }
}

## Add your filters / logstash plugins configuration here

output {
    elasticsearch {
        hosts => "localhost:9201"
    }
}

Answer 1

providing the custom template and updating its path in output plugin solved the issue.