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.