# Logstash java.lang.IllegalStateException

**URL:** <https://discuss.elastic.co/t/logstash-java-lang-illegalstateexception/216407>\
**Category:** Logstash\
**Created:** [January 24, 2020, 11:14am UTC](https://discuss.elastic.co/t/logstash-java-lang-illegalstateexception/216407 "2020-01-24T11:14:05Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Nusko](https://avatars.discourse-cdn.com/v4/letter/n/e56c9b/32.png) [@Nusko](https://discuss.elastic.co/u/Nusko)\
**Post date:** [January 24, 2020, 11:14am UTC](https://discuss.elastic.co/t/logstash-java-lang-illegalstateexception/216407/1 "2020-01-24T11:14:05Z")

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Hello,

I am new to logstash (and so ELK in general). I was trying to set ELK for netflow and I am constantly facing following error:

`[ERROR][logstash.agent] An exception happened when converging configuration {:exception=>LogStash::Error, :message=>"Don't know how to handle 'Java::JavaLang::IllegalStateException' for 'PipelineAction::Create<main>'", :backtrace=>["org/logstash/execution/ConvergeResultExt.java:109:in 'create'", "org/logstash/execution/ConvergeResultExt.java:37:in 'add'", "/home/ounikowski/Desktop/Elastic/logstash-7.5.1/logstash-core/lib/logstash/agent.rb:339:in 'block in converge_state'"]}`

`[FATAL][logstash.runner] An unexpected error occurred! {:error=>#<LogStash::Error: Don't know how to handle Java::JavaLang::IllegalStateException for PipelineAction::Create<main>>, :backtrace=>["org/logstash/execution/ConvergeResultExt.java:109:in create'", "org/logstash/execution/ConvergeResultExt.java:37:in add'", "/home/ounikowski/Desktop/Elastic/logstash-7.5.1/logstash-core/lib/logstash/agent.rb:339:in block in converge_state'"]}`

` [ERROR][org.logstash.Logstash] java.lang.IllegalStateException: Logstash stopped processing because of an error: (SystemExit) exit`

I have read several instructions and discussions, but none of the solutions worked.

I am looking forward to hearing from you.

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**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [February 21, 2020, 11:19am UTC](https://discuss.elastic.co/t/logstash-java-lang-illegalstateexception/216407/2 "2020-02-21T11:19:21Z")

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