# Exception in thread "main" java.lang.UnsupportedClassVersionError: org/jruby/Main : Unsupported major.minor version 51.0

**URL:** <https://discuss.elastic.co/t/exception-in-thread-main-java-lang-unsupportedclassversionerror-org-jruby-main-unsupported-major-minor-version-51-0/177364>\
**Category:** Logstash\
**Created:** [April 17, 2019, 6:52pm UTC](https://discuss.elastic.co/t/exception-in-thread-main-java-lang-unsupportedclassversionerror-org-jruby-main-unsupported-major-minor-version-51-0/177364 "2019-04-17T18:52:57Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![mgolubov55](https://avatars.discourse-cdn.com/v4/letter/m/c6cbf5/32.png) [@mgolubov55](https://discuss.elastic.co/u/mgolubov55)\
**Post date:** [April 17, 2019, 6:52pm UTC](https://discuss.elastic.co/t/exception-in-thread-main-java-lang-unsupportedclassversionerror-org-jruby-main-unsupported-major-minor-version-51-0/177364/1 "2019-04-17T18:52:58Z")

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Exception in thread "main" java.lang.UnsupportedClassVersionError: org/jruby/Main : Unsupported major.minor version 51.0

Has anyone successfully resolved this error when trying to implement logstash-plugin

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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:** [May 15, 2019, 6:52pm UTC](https://discuss.elastic.co/t/exception-in-thread-main-java-lang-unsupportedclassversionerror-org-jruby-main-unsupported-major-minor-version-51-0/177364/2 "2019-05-15T18:52:58Z")

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