# An unexpected error occurred! {:error=\>#\<NoMethodError: undefined method

**URL:** <https://discuss.elastic.co/t/an-unexpected-error-occurred-error-nomethoderror-undefined-method/234752>\
**Category:** Logstash\
**Created:** [May 28, 2020, 1:24pm UTC](https://discuss.elastic.co/t/an-unexpected-error-occurred-error-nomethoderror-undefined-method/234752 "2020-05-28T13:24:32Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![Raj\_Techie](https://avatars.discourse-cdn.com/v4/letter/r/ea666f/32.png) [@Raj\_Techie](https://discuss.elastic.co/u/Raj_Techie)\
**Post date:** [May 28, 2020, 1:24pm UTC](https://discuss.elastic.co/t/an-unexpected-error-occurred-error-nomethoderror-undefined-method/234752/1 "2020-05-28T13:24:32Z")

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Hi Currently using logstash version 6.0.1. connecting to ES 5.1.X.  
Got below error like ---  
An unexpected error occurred! {:error=\>#\<NoMethodError: undefined method `<' for nil:NilClass>, :backtrace=>["/appserver/pq-logstash/logstash-6.0.1/vendor/bundle/jruby/2.3.0/gems/logstash-output-elasticsearch-9.0.2-java/lib/logstash/outputs/elasticsearch/common.rb:213:in `get\_event\_type'", "/appserver/pq-logstash/logstash-6.0.1/vendor/bundle/jruby/2.3.0/gems/logstash-output-elasticsearch-9.0.2-java/lib/logstash/outputs/elasticsearch/common.rb:165:in `event_action_params'", "/appserver/pq-logstash/logstash-6.0.1/vendor/bundle/jruby/2.3.0/gems/logstash-output-elasticsearch-9.0.2-java/lib/logstash/outputs/elasticsearch/common.rb:39:in `event\_action\_tuple'", "/appserver/pq-logstash/logstash-6.0.1/vendor/bundle/jruby/2.3.0/gems/logstash-output-elasticsearch-9.0.2-java/lib/logstash/outputs/elasticsearch/common.rb:34:in `block in multi_receive'", "org/jruby/RubyArray.java:2486:in `map'", "/appserver/pq-logstash/logstash-6.0.1/vendor/bundle/jruby/2.3.0/gems/logstash-output-elasticsearch-9.0.2-java/lib/logstash/outputs/elasticsearch/common.rb:34:in `multi_receive'", "/appserver/pq-logstash/logstash-6.0.1/logstash-core/lib/logstash/output_delegator_strategies/shared.rb:13:in `multi\_receive'", "/appserver/pq-logstash/logstash-6.0.1/logstash-core/lib/logstash/output\_delegator.rb:49:in `multi_receive'", "/appserver/pq-logstash/logstash-6.0.1/logstash-core/lib/logstash/pipeline.rb:538:in `block in output\_batch'", "org/jruby/RubyHash.java:1343:in `each'", "/appserver/pq-logstash/logstash-6.0.1/logstash-core/lib/logstash/pipeline.rb:536:in `output\_batch'", "/appserver/pq-logstash/logstash-6.0.1/logstash-core/lib/logstash/pipeline.rb:481:in `worker_loop'", "/appserver/pq-logstash/logstash-6.0.1/logstash-core/lib/logstash/pipeline.rb:439:in `block in start\_workers'"]}  
[2020-05-28T13:23:14,410][INFO][logstash.inputs.beats] Beats inputs: Starting input listener {:address=\>"0.0.0.0:5044"}

Can anyone help on this.

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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 25, 2020, 1:24pm UTC](https://discuss.elastic.co/t/an-unexpected-error-occurred-error-nomethoderror-undefined-method/234752/2 "2020-06-25T13:24:36Z")

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