# Logstash FATAL Error

**URL:** https://discuss.elastic.co/t/logstash-fatal-error/132247
**Category:** Logstash
**Created:** [May 17, 2018, 3:57am UTC](https://discuss.elastic.co/t/logstash-fatal-error/132247 "2018-05-17T03:57:01Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![Sunillinus](https://avatars.discourse-cdn.com/v4/letter/s/2bfe46/32.png) [@Sunillinus](https://discuss.elastic.co/u/Sunillinus)
#### Post date: [May 17, 2018, 3:57am UTC](https://discuss.elastic.co/t/logstash-fatal-error/132247/1 "2018-05-17T03:57:02Z")

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Hi,

I'm using logstash 6.2.4 version

I ran into this error in logstash when it is executing to upload log file into kibana.

Can anyone please let me know what would be the reason for this error.

[2018-05-17T00:25:00,098][FATAL][logstash.runner] An unexpected error  
occurred! {:error=\>#\<NoMethodError: undefined method `map_cleanup' for nil:NilCl ass>, :backtrace=>["C:/ELK/logstash-6.2.4/logstash-6.2.4/vendor/bundle/jruby/2.3 .0/gems/logstash-codec-multiline-3.0.9/lib/logstash/codecs/identity_map_codec.rb :55:in`block in start'"]}  
[2018-05-17T00:25:03,785][ERROR][org.logstash.Logstash] java.lang.IllegalSta  
teException: org.jruby.exceptions.RaiseException: (SystemExit) exit

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<div class="post-metadata">

### Author: ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)
#### Post date: [June 14, 2018, 3:57am UTC](https://discuss.elastic.co/t/logstash-fatal-error/132247/2 "2018-06-14T03:57:02Z")

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