# Logstash fails to start
**URL:** https://discuss.elastic.co/t/logstash-fails-to-start/181972
**Category:** Logstash
**Created:** [May 21, 2019, 10:05am UTC](https://discuss.elastic.co/t/logstash-fails-to-start/181972 "2019-05-21T10:05:34Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@premkumar](https://discuss.elastic.co/u/premkumar)
#### Post date: [May 21, 2019, 10:05am UTC](https://discuss.elastic.co/t/logstash-fails-to-start/181972/1 "2019-05-21T10:05:34Z")
Hi Team,
I just downloaded logstash (version 7.1.0) for linux and trying to start it. But it get failed with the following error.
[dev@devlinux bin]$ ./logstash -f /home/dev/Desktop/LOGSTASH/logstash-simple.conf
Sending Logstash logs to /media/sf\_ELK/logstash-7.1.0.tar/logstash-7.1.0/logs which is now configured via log4j2.properties
[2019-05-21T05:38:23,289][WARN][logstash.config.source.multilocal] Ignoring the 'pipelines.yml' file because modules or command line options are specified
[2019-05-21T05:38:23,387][INFO][logstash.runner] Starting Logstash {"logstash.version"=\>"7.1.0"}
[2019-05-21T05:38:47,031][INFO][logstash.outputs.elasticsearch] Elasticsearch pool URLs updated {:changes=\>{:removed=\>, :added=\>[[http://localhost:9200/](http://localhost:9200/)]}}
[2019-05-21T05:38:47,591][WARN][logstash.outputs.elasticsearch] Restored connection to ES instance {:url=\>"[http://localhost:9200/](http://localhost:9200/)"}
warning: thread "[main]-pipeline-manager" terminated with exception (report\_on\_exception is true):
java.lang.NoClassDefFoundError: com/fasterxml/jackson/module/afterburner/AfterburnerModule
at com.jrjackson.JrJacksonRuby.\_\_parse(JrJacksonRuby.java:75)
at com.jrjackson.JrJacksonRuby.parse(JrJacksonRuby.java:63)
at com.jrjackson.JrJacksonRuby$INVOKER$s$2$0$parse.call(JrJacksonRuby$INVOKER$s$2$0$parse.gen)
at org.jruby.internal.runtime.methods.JavaMethod$JavaMethodN.call(JavaMethod.java:835)
at org.jruby.ir.targets.InvokeSite.invoke(InvokeSite.java:183)
at
Please find the content of the logstash configuration file.
input { stdin { } }
output {
elasticsearch { hosts =\> ["localhost:9200"] }
stdout { codec =\> rubydebug }
}
Please provide a solution to start the logstash
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### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [June 18, 2019, 10:05am UTC](https://discuss.elastic.co/t/logstash-fails-to-start/181972/2 "2019-06-18T10:05:34Z")
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