When I put the ancien name of conf file, I get this error :
[2018-05-15T11:51:29,521][INFO ][logstash.outputs.elasticsearch] Elasticsearch pool URLs updated {:changes=>{:removed=>[], :added=>[http://localhost:9200/]}}
[2018-05-15T11:51:29,522][INFO ][logstash.outputs.elasticsearch] Running health check to see if an Elasticsearch connection is working {:healthcheck_url=>http://localhost:9200/, :path=>"/"}
[2018-05-15T11:51:29,541][WARN ][logstash.outputs.elasticsearch] Restored connection to ES instance {:url=>"http://localhost:9200/"}
[2018-05-15T11:51:29,568][INFO ][logstash.outputs.elasticsearch] ES Output version determined {:es_version=>6}
[2018-05-15T11:51:29,568][WARN ][logstash.outputs.elasticsearch] Detected a 6.x and above cluster: the type
event field won't be used to determine the document _type {:es_version=>6}
[2018-05-15T11:51:29,569][INFO ][logstash.outputs.elasticsearch] Using mapping template from {:path=>nil}
[2018-05-15T11:51:29,570][INFO ][logstash.outputs.elasticsearch] Attempting to install template {:manage_template=>{"template"=>"logstash-", "version"=>60001, "settings"=>{"index.refresh_interval"=>"5s"}, "mappings"=>{"default"=>{"dynamic_templates"=>[{"message_field"=>{"path_match"=>"message", "match_mapping_type"=>"string", "mapping"=>{"type"=>"text", "norms"=>false}}}, {"string_fields"=>{"match"=>"", "match_mapping_type"=>"string", "mapping"=>{"type"=>"text", "norms"=>false, "fields"=>{"keyword"=>{"type"=>"keyword", "ignore_above"=>256}}}}}], "properties"=>{"@timestamp"=>{"type"=>"date"}, "@version"=>{"type"=>"keyword"}, "geoip"=>{"dynamic"=>true, "properties"=>{"ip"=>{"type"=>"ip"}, "location"=>{"type"=>"geo_point"}, "latitude"=>{"type"=>"half_float"}, "longitude"=>{"type"=>"half_float"}}}}}}}}
[2018-05-15T11:51:29,586][INFO ][logstash.outputs.elasticsearch] New Elasticsearch output {:class=>"LogStash::Outputs::ElasticSearch", :hosts=>["//localhost:9200"]}
[2018-05-15T11:51:29,970][INFO ][logstash.inputs.beats ] Beats inputs: Starting input listener {:address=>"0.0.0.0:5044"}
[2018-05-15T11:51:29,977][INFO ][org.logstash.beats.Server] Starting server on port: 5044
[2018-05-15T11:51:29,979][INFO ][logstash.pipeline ] Pipeline started successfully {:pipeline_id=>"main", :thread=>"#<Thread:0x6bcbfd4c@/usr/share/logstash/logstash-core/lib/logstash/pipeline.rb:247 sleep>"}
[2018-05-15T11:51:29,980][INFO ][logstash.agent ] Pipelines running {:count=>1, :pipelines=>["main"]}
[2018-05-15T11:52:02,301][FATAL][logstash.runner ] An unexpected error occurred! {:error=>#<SystemCallError: Unknown error (SystemCallError) - >, :backtrace=>["org/jruby/RubyIO.java:1457:in write'", "org/jruby/RubyIO.java:1428:in
write'", "/usr/share/logstash/vendor/bundle/jruby/2.3.0/gems/logstash-output-stdout-3.1.4/lib/logstash/outputs/stdout.rb:43:in block in multi_receive_encoded'", "org/jruby/RubyArray.java:1734:in
each'", "/usr/share/logstash/vendor/bundle/jruby/2.3.0/gems/logstash-output-stdout-3.1.4/lib/logstash/outputs/stdout.rb:42:in multi_receive_encoded'", "/usr/share/logstash/logstash-core/lib/logstash/outputs/base.rb:90:in
multi_receive'", "/usr/share/logstash/logstash-core/lib/logstash/output_delegator_strategies/single.rb:15:in block in multi_receive'", "org/jruby/ext/thread/Mutex.java:148:in
synchronize'", "/usr/share/logstash/logstash-core/lib/logstash/output_delegator_strategies/single.rb:14:in multi_receive'", "/usr/share/logstash/logstash-core/lib/logstash/output_delegator.rb:49:in
multi_receive'", "/usr/share/logstash/logstash-core/lib/logstash/pipeline.rb:477:in block in output_batch'", "org/jruby/RubyHash.java:1343:in
each'", "/usr/share/logstash/logstash-core/lib/logstash/pipeline.rb:476:in output_batch'", "/usr/share/logstash/logstash-core/lib/logstash/pipeline.rb:428:in
worker_loop'", "/usr/share/logstash/logstash-core/lib/logstash/pipeline.rb:386:in `block in start_workers'"]}
[2018-05-15T11:52:02,525][ERROR][org.logstash.Logstash ] java.lang.IllegalStateException: org.jruby.exceptions.RaiseException: (SystemExit) exit