# Logstash stops randomly with NoMethodError: undefined method \`split' for nil:NilClass Exception

**URL:** <https://discuss.elastic.co/t/logstash-stops-randomly-with-nomethoderror-undefined-method-split-for-nil-nilclass-exception/98596>\
**Category:** Logstash\
**Created:** [August 28, 2017, 6:48pm UTC](https://discuss.elastic.co/t/logstash-stops-randomly-with-nomethoderror-undefined-method-split-for-nil-nilclass-exception/98596 "2017-08-28T18:48:26Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![amit.karir](https://avatars.discourse-cdn.com/v4/letter/a/b2d939/32.png) [@amit.karir](https://discuss.elastic.co/u/amit.karir)\
**Post date:** [August 28, 2017, 6:48pm UTC](https://discuss.elastic.co/t/logstash-stops-randomly-with-nomethoderror-undefined-method-split-for-nil-nilclass-exception/98596/1 "2017-08-28T18:48:27Z")

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Hi,

Logstash stops running randomly with below exception message. Would really appreciate any pointers to resolve this issue:

Exception in pipelineworker, the pipeline stopped processing new events, please check your filter configuration and restart Logstash.", "exception"=\># **\<NoMethodError: undefined method `split' for nil:NilClass>** , "backtrace"=>[ **"C:/ELK/logstash-2.2.1/logstash-2.2.1/lib/logstash/filters/eventsplitter.rb:23:in`filter'"** ,  
"C:/ELK/logstash-2.2.1/logstash-2.2.1/vendor/bundle/jruby/1.9/gems/logstash-core-2.2.1-java/lib/logstash/filters/base.rb:151:in `multi_filter'", "org/jruby/RubyArray.java:1613:in`each'",  
"C:/ELK/logstash-2.2.1/logstash-2.2.1/vendor/bundle/jruby/1.9/gems/logstash-core-2.2.1-java/lib/logstash/filters/base.rb:148:in `multi_filter'", "(eval):427:in`filter\_func'",  
"C:/ELK/logstash-2.2.1/logstash-2.2.1/vendor/bundle/jruby/1.9/gems/logstash-core-2.2.1-java/lib/logstash/pipeline.rb:256:in `filter_batch'", "org/jruby/RubyArray.java:1613:in`each'", "org/jruby/RubyEnumerable.java:852:in `inject'", "C:/ELK/logstash-2.2.1/logstash-2.2.1/vendor/bundle/jruby/1.9/gems/logstash-core-2.2.1-java/lib/logstash/pipeline.rb:254:in`filter\_batch'",  
"C:/ELK/logstash-2.2.1/logstash-2.2.1/vendor/bundle/jruby/1.9/gems/logstash-core-2.2.1-java/lib/logstash/pipeline.rb:212:in `worker_loop'", "C:/ELK/logstash-2.2.1/logstash-2.2.1/vendor/bundle/jruby/1.9/gems/logstash-core-2.2.1-java/lib/logstash/pipeline.rb:190:in`start\_workers'"], :level=\>:error}

Here is the eventsplitter.rb file (see line # 23 below where error is thrown):

 ![image](https://us1.discourse-cdn.com/elastic/original/3X/7/0/70ad3c5306de689e7f77067039641c9f421aa648.png)

And this is how it is called from Logstash config:

input {  
rabbitmq {  
durable =\> true  
exchange =\> "XXXXXXXXXXX"   
host =\> "USXXXXXXXXXXX"  
user =\> "XX"  
password =\> "XXX"  
port =\> 5672   
queue =\> "XXXXXXXXXXX"  
vhost =\> "/"  
}  
}  
filter {  
ruby{  
init =\> "  
require 'base64'  
require 'zlib'  
"

```
			code => "
						#UnZIP the dyanamic data and store it into payload_json event field
						event['payload_json'] = Zlib::Inflate.new(-Zlib::MAX_WBITS).inflate(Base64.decode64(event['message']))
			        "
					
					#Removing unwanted fields
					remove_field=>['message']
					remove_field=>['headers']
					
	}
		

	#Breaking http input message into multiple event
	**eventsplitter**

```

\*\* {\*\*  
\*\* row\_split =\> "\n"\*\*  
\*\* field\_split =\> ","\*\*  
\*\* value\_split =\> "~"\*\*

* * *

\*\* }\*\*

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<div class="post-metadata">

**Author:** ![magnusbaeck](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/magnusbaeck/32/44943_2.png) [@magnusbaeck](https://discuss.elastic.co/u/magnusbaeck)\
**Post date:** [August 29, 2017, 5:30am UTC](https://discuss.elastic.co/t/logstash-stops-randomly-with-nomethoderror-undefined-method-split-for-nil-nilclass-exception/98596/2 "2017-08-29T05:30:21Z")

</div>

`event['something']` returns null when the field doesn't exist so that's probably what happened here.

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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:** [September 26, 2017, 5:36am UTC](https://discuss.elastic.co/t/logstash-stops-randomly-with-nomethoderror-undefined-method-split-for-nil-nilclass-exception/98596/3 "2017-09-26T05:36:01Z")

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