# Logstash 6.8.3 is crashing 'to\_hash\_with\_metadata'

**URL:** <https://discuss.elastic.co/t/logstash-6-8-3-is-crashing-to-hash-with-metadata/233689>\
**Category:** Logstash\
**Created:** [May 21, 2020, 7:26am UTC](https://discuss.elastic.co/t/logstash-6-8-3-is-crashing-to-hash-with-metadata/233689 "2020-05-21T07:26:54Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![denzhel](https://avatars.discourse-cdn.com/v4/letter/d/e19adc/32.png) [@denzhel](https://discuss.elastic.co/u/denzhel)\
**Post date:** [May 21, 2020, 7:26am UTC](https://discuss.elastic.co/t/logstash-6-8-3-is-crashing-to-hash-with-metadata/233689/1 "2020-05-21T07:26:54Z")

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Hello everyone,

I have 4 identical servers that runs the same deployment of Logstash 6.8.3, one of them, only one crashes with the following error:

[2020-05-21T06:11:31,662][ERROR][logstash.pipeline] Exception in pipelineworker, the pipeline stopped processing new events, please check your filter configuration and restart Logstash. {:pipeline\_id=\>"main", "exception"=\>"undefined method `to_hash_with_metadata' for nil:NilClass", "backtrace"=>["/usr/share/logstash/vendor/bundle/jruby/2.5.0/gems/logstash-filter-multiline-3.0.4/lib/logstash/filters/multiline.rb:273:in `block in merge'", "org/jruby/RubyArray.java:1792:in `each'", "org/jruby/RubyEnumerable.java:1062:in `inject'", "/usr/share/logstash/vendor/bundle/jruby/2.5.0/gems/logstash-filter-multiline-3.0.4/lib/logstash/filters/multiline.rb:272:in `merge'", "/usr/share/logstash/vendor/bundle/jruby/2.5.0/gems/logstash-filter-multiline-3.0.4/lib/logstash/filters/multiline.rb:230:in `previous\_filter!'", "/usr/share/logstash/vendor/bundle/jruby/2.5.0/gems/logstash-filter-multiline-3.0.4/lib/logstash/filters/multiline.rb:173:in `filter'", "/usr/share/logstash/logstash-core/lib/logstash/filters/base.rb:143:in `do\_filter'", "/usr/share/logstash/logstash-core/lib/logstash/filters/base.rb:162:in `block in multi_filter'", "org/jruby/RubyArray.java:1792:in `each'", "/usr/share/logstash/logstash-core/lib/logstash/filters/base.rb:159:in `multi_filter'", "org/logstash/config/ir/compiler/AbstractFilterDelegatorExt.java:115:in `multi\_filter'", "(eval):35713:in `block in initialize'", "org/jruby/RubyArray.java:1792:in `each'", "(eval):35710:in `block in initialize'", "(eval):5411:in `block in filter\_func'", "/usr/share/logstash/logstash-core/lib/logstash/pipeline.rb:358:in `filter_batch'", "/usr/share/logstash/logstash-core/lib/logstash/pipeline.rb:337:in `worker\_loop'", "/usr/share/logstash/logstash-core/lib/logstash/pipeline.rb:304:in `block in start\_workers'"], :thread=\>"#\<Thread:0x37b3ef82 sleep\>"}

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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 18, 2020, 7:27am UTC](https://discuss.elastic.co/t/logstash-6-8-3-is-crashing-to-hash-with-metadata/233689/2 "2020-06-18T07:27:23Z")

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