### Author:  [@M\_B\_I](https://discuss.elastic.co/u/M_B_I)
#### Post date: [August 3, 2018, 7:31am UTC](https://discuss.elastic.co/t/logstash-exeption-undefined-method-for-nil-nilclass/142859/1 "2018-08-03T07:31:43Z")
**Hi all, I have a few filters. Some days I receive an errors :**
_[2018-08-03T07:38:53,905][ERROR][logstash.pipeline] Exception in pipelineworker, the pipeline stopped processing new events,_
\_ please check your filter configuration and restart Logstash.\_
\_ {"exception"=\>"undefined method `>' for nil:NilClass",_ _ "backtrace"=>["(eval):1981:in`initialize'",\_
\_ "org/jruby/RubyArray.java:1613:in `each'",_ _ "(eval):1979:in`initialize'", "org/jruby/RubyProc.java:281:in `call'", "(eval):1999:in`initialize'",\_
\_ "org/jruby/RubyArray.java:1613:in `each'", "(eval):1993:in`initialize'",\_
\_ "org/jruby/RubyProc.java:281:in `call'", "(eval):530:in`filter\_func'",\_
\_ "/usr/share/logstash/logstash-core/lib/logstash/pipeline.rb:370:in `filter_batch'",_ _ "org/jruby/RubyProc.java:281:in`call'", "/usr/share/logstash/logstash-core/lib/logstash/util/wrapped\_synchronous\_queue.rb:224:in `each'",_ _ "org/jruby/RubyHash.java:1342:in`each'", "/usr/share/logstash/logstash-core/lib/logstash/util/wrapped\_synchronous\_queue.rb:223:in `each'",_ _ "/usr/share/logstash/logstash-core/lib/logstash/pipeline.rb:369:in`filter\_batch'",\_
\_ "/usr/share/logstash/logstash-core/lib/logstash/pipeline.rb:350:in `worker_loop'",_ _ "/usr/share/logstash/logstash-core/lib/logstash/pipeline.rb:317:in`start\_workers'"]}\_
\_ [2018-08-03T07:38:54,322][FATAL][logstash.runner] An unexpected error occurred! {:error=\>#\' for nil:NilClass>,_ _ :backtrace=>["(eval):1981:in`initialize'", "org/jruby/RubyArray.java:1613:in `each'",_ _ "(eval):1979:in`initialize'", "org/jruby/RubyProc.java:281:in `call'",_ _ "(eval):1999:in`initialize'", "org/jruby/RubyArray.java:1613:in `each'",_ _ "(eval):1993:in`initialize'", "org/jruby/RubyProc.java:281:in `call'",_ _ "(eval):530:in`filter\_func'", "/usr/share/logstash/logstash-core/lib/logstash/pipeline.rb:370:in `filter_batch'",_ _ "org/jruby/RubyProc.java:281:in`call'", "/usr/share/logstash/logstash-core/lib/logstash/util/wrapped\_synchronous\_queue.rb:224:in `each'",_ _ "org/jruby/RubyHash.java:1342:in`each'", "/usr/share/logstash/logstash-core/lib/logstash/util/wrapped\_synchronous\_queue.rb:223:in `each'",_ _ "/usr/share/logstash/logstash-core/lib/logstash/pipeline.rb:369:in`filter\_batch'",\_
\_ "/usr/share/logstash/logstash-core/lib/logstash/pipeline.rb:350:in `worker_loop'",_ _ "/usr/share/logstash/logstash-core/lib/logstash/pipeline.rb:317:in`start\_workers'"]}\_
**From this messages I don't understand in what config may prevent for this erros ? Or maybe this errors occurs cause there are a lot of events in logstash queque?**
---
### Author:  [@Charaf\_Ahmed](https://discuss.elastic.co/u/Charaf_Ahmed)
#### Post date: [August 3, 2018, 7:34am UTC](https://discuss.elastic.co/t/logstash-exeption-undefined-method-for-nil-nilclass/142859/2 "2018-08-03T07:34:24Z")
Could you have a little more precision on your problem? show logstash.conf file
---
### Author:  [@M\_B\_I](https://discuss.elastic.co/u/M_B_I)
#### Post date: [August 3, 2018, 8:15am UTC](https://discuss.elastic.co/t/logstash-exeption-undefined-method-for-nil-nilclass/142859/3 "2018-08-03T08:15:35Z")
I have a lot of config files, and they are big 🙄 Maybe there is the way to find what config is the causing of the error?
---
### Author:  [@M\_B\_I](https://discuss.elastic.co/u/M_B_I)
#### Post date: [August 6, 2018, 7:04am UTC](https://discuss.elastic.co/t/logstash-exeption-undefined-method-for-nil-nilclass/142859/4 "2018-08-06T07:04:42Z")
I revised all the configs and everything I found :
if [value] \> 3
{
mutate
{
update =\> {"value" =\> 0}
}
}
so I corrected it like this :
if [value] and [value] \> 3
{
mutate
{
update =\> {"value" =\> 0}
}
}
hope it helps
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [September 3, 2018, 7:04am UTC](https://discuss.elastic.co/t/logstash-exeption-undefined-method-for-nil-nilclass/142859/5 "2018-09-03T07:04:42Z")
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