# BadRequirementError, Illformed requirement, fail to install offline logstash java plugin for the version reason or others?

**URL:** https://discuss.elastic.co/t/badrequirementerror-illformed-requirement-fail-to-install-offline-logstash-java-plugin-for-the-version-reason-or-others/256619
**Category:** Logstash
**Created:** [November 25, 2020, 8:59am UTC](https://discuss.elastic.co/t/badrequirementerror-illformed-requirement-fail-to-install-offline-logstash-java-plugin-for-the-version-reason-or-others/256619 "2020-11-25T08:59:37Z")
**Posts on this page:** 3
**Page:** 1

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### Author: ![hellopcz](https://avatars.discourse-cdn.com/v4/letter/h/ba9def/32.png) [@hellopcz](https://discuss.elastic.co/u/hellopcz)
#### Post date: [November 25, 2020, 8:59am UTC](https://discuss.elastic.co/t/badrequirementerror-illformed-requirement-fail-to-install-offline-logstash-java-plugin-for-the-version-reason-or-others/256619/1 "2020-11-25T08:59:37Z")

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I've packed logstash offline java plugin but the plugin can not be well installed.  
it may be caused by wrong version. The offline plugin was built by prepare-offline-pack command but plugin name has to be set to logstash\*(wildcard) that logstash can find the installed online logstash java plugin and named it as logstash-offline-plugins-7.9.0, otherwise it can not find installed online logstash java plugin even with the --output parameters.  
Could some expert help to give some advice?

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### Author: ![hellopcz](https://avatars.discourse-cdn.com/v4/letter/h/ba9def/32.png) [@hellopcz](https://discuss.elastic.co/u/hellopcz)
#### Post date: [November 25, 2020, 9:01am UTC](https://discuss.elastic.co/t/badrequirementerror-illformed-requirement-fail-to-install-offline-logstash-java-plugin-for-the-version-reason-or-others/256619/2 "2020-11-25T09:01:13Z")

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![offline_install](https://us1.discourse-cdn.com/elastic/original/3X/d/0/d03856ff777fb97dbc7a50ed8c250242a400a5ed.jpeg)

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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: [December 23, 2020, 9:01am UTC](https://discuss.elastic.co/t/badrequirementerror-illformed-requirement-fail-to-install-offline-logstash-java-plugin-for-the-version-reason-or-others/256619/3 "2020-12-23T09:01:15Z")

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