{:timestamp=>"2016-07-27T07:00:12.692000-0500", :message=>"Exception in pipelineworker, the pipeline stopped processing new events, please check your filter configuration and restart Logstash.", "exception"=>#<NoMethodError: undefined method `to_hash_with_metadata' for nil:NilClass>, "backtrace"=>["/opt/logstash/vendor/bundle/jruby/1.9/gems/logstash-filter-multiline-2.0.5/lib/logstash/filters/multiline.rb:275:in `merge'", "org/jruby/RubyArray.java:1613:in `each'", "org/jruby/RubyEnumerable.java:852:in `inject'", "/opt/logstash/vendor/bundle/jruby/1.9/gems/logstash-filter-multiline-2.0.5/lib/logstash/filters/multiline.rb:274:in `merge'", "/opt/logstash/vendor/bundle/jruby/1.9/gems/logstash-filter-multiline-2.0.5/lib/logstash/filters/multiline.rb:232:in `previous_filter!'", "/opt/logstash/vendor/bundle/jruby/1.9/gems/logstash-filter-multiline-2.0.5/lib/logstash/filters/multiline.rb:175:in `filter'", "/opt/logstash/vendor/bundle/jruby/1.9/gems/logstash-core-2.3.4-java/lib/logstash/filters/base.rb:151:in `multi_filter'", "org/jruby/RubyArray.java:1613:in `each'", "/opt/logstash/vendor/bundle/jruby/1.9/gems/logstash-core-2.3.4-java/lib/logstash/filters/base.rb:148:in `multi_filter'", "(eval):10748:in `initialize'", "org/jruby/RubyArray.java:1613:in `each'", "(eval):10745:in `initialize'", "org/jruby/RubyProc.java:281:in `call'", "(eval):2109:in `filter_func'", "/opt/logstash/vendor/bundle/jruby/1.9/gems/logstash-core-2.3.4-java/lib/logstash/pipeline.rb:267:in `filter_batch'", "org/jruby/RubyArray.java:1613:in `each'", "org/jruby/RubyEnumerable.java:852:in `inject'", "/opt/logstash/vendor/bundle/jruby/1.9/gems/logstash-core-2.3.4-java/lib/logstash/pipeline.rb:265:in `filter_batch'", "/opt/logstash/vendor/bundle/jruby/1.9/gems/logstash-core-2.3.4-java/lib/logstash/pipeline.rb:223:in `worker_loop'", "/opt/logstash/vendor/bundle/jruby/1.9/gems/logstash-core-2.3.4-java/lib/logstash/pipeline.rb:201:in `start_workers'"], :level=>:error}