# We are getting Ruby exception error in logstash

**URL:** <https://discuss.elastic.co/t/we-are-getting-ruby-exception-error-in-logstash/319188>\
**Category:** Logstash\
**Created:** [November 17, 2022, 12:21pm UTC](https://discuss.elastic.co/t/we-are-getting-ruby-exception-error-in-logstash/319188 "2022-11-17T12:21:35Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![upreddy](https://avatars.discourse-cdn.com/v4/letter/u/f04885/32.png) [@upreddy](https://discuss.elastic.co/u/upreddy)\
**Post date:** [November 17, 2022, 12:21pm UTC](https://discuss.elastic.co/t/we-are-getting-ruby-exception-error-in-logstash/319188/1 "2022-11-17T12:21:35Z")

</div>

Hi,  
we are getting ruby exception error in logstash as shown in below.  
[ERROR][logstash.filters.ruby][xxxxxxxxxx][634d732ae35f96b2b7a40d6e0005815a22897257fd1aa2279fe1d02125a79ba0] Ruby exception occurred: undefined method `each' for nil:NilClass {:class=>"NoMethodError", :backtrace=>["(ruby filter code):3:in `block in filter\_method'", "/usr/share/logstash/vendor/bundle/jruby/2.5.0/gems/logstash-filter-ruby-3.1.7/lib/logstash/filters/ruby.rb:93:in `inline_script'", "/usr/share/logstash/vendor/bundle/jruby/2.5.0/gems/logstash-filter-ruby-3.1.7/lib/logstash/filters/ruby.rb:86:in `filter'", "/usr/share/logstash/logstash-core/lib/logstash/filters/base.rb:159:in `do_filter'", "/usr/share/logstash/logstash-core/lib/logstash/filters/base.rb:178:in `block in multi\_filter'", "org/jruby/RubyArray.java:1821:in `each'", "/usr/share/logstash/logstash-core/lib/logstash/filters/base.rb:175:in `multi\_filter'", "org/logstash/config/ir/compiler/AbstractFilterDelegatorExt.java:134:in `multi_filter'", "/usr/share/logstash/logstash-core/lib/logstash/java_pipeline.rb:299:in `block in start\_workers'"]}

the ruby part is  
if([abc])  
{   
ruby {  
code =\> "  
event.get('[abc][Steps]').each do |item|  
event.set('[abc][step'+item['stepid'].to\_s+']',item)  
end  
"  
}  
}

---

<div class="post-metadata">

**Author:** ![Badger](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/badger/32/25190_2.png) [@Badger](https://discuss.elastic.co/u/Badger)\
**Post date:** [November 17, 2022, 5:02pm UTC](https://discuss.elastic.co/t/we-are-getting-ruby-exception-error-in-logstash/319188/2 "2022-11-17T17:02:46Z")

</div>

The event.get is returning nil, meaning the field does not exist. You can either save the result of event.get in a local variable and use a conditional before using it, or [wrap](https://discuss.elastic.co/t/locate-json-field-with-jsonpath-logstash/318812/2) the .get/.set in begin/rescue/end.

---

<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:** [December 15, 2022, 5:02pm UTC](https://discuss.elastic.co/t/we-are-getting-ruby-exception-error-in-logstash/319188/3 "2022-12-15T17:02:46Z")

</div>

This topic was automatically closed 28 days after the last reply. New replies are no longer allowed.