# About the installed plugins when upgrade Java (8 - \> 11) **URL:** \ **Category:** Elasticsearch\ **Created:** [June 30, 2020, 7:04am UTC](https://discuss.elastic.co/t/about-the-installed-plugins-when-upgrade-java-8-11/239236 "2020-06-30T07:04:56Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![Hyunsoo\_Shim](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/hyunsoo_shim/32/55197_2.png) [@Hyunsoo\_Shim](https://discuss.elastic.co/u/Hyunsoo_Shim)\ **Post date:** [June 30, 2020, 7:04am UTC](https://discuss.elastic.co/t/about-the-installed-plugins-when-upgrade-java-8-11/239236/1 "2020-06-30T07:04:56Z")
Hello, We are using Elasticsearch 6.5.2 on Java 8 currently, and have a plan to upgrade **Java 11** for using G1GC safely. But, we have already installed many custom plugins made of Java 8. Do we need to install them again after Java Upgrade? And is there any backward compatibility issues for custom plugin made of Java 8? Thank you!! ---
**Author:** ![dadoonet](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dadoonet/32/137187_2.png) [@dadoonet](https://discuss.elastic.co/u/dadoonet)\ **Post date:** [June 30, 2020, 8:11am UTC](https://discuss.elastic.co/t/about-the-installed-plugins-when-upgrade-java-8-11/239236/2 "2020-06-30T08:11:01Z")
I believe that the code that has been created On Java8 can be run on Java 11. ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [July 28, 2020, 8:11am UTC](https://discuss.elastic.co/t/about-the-installed-plugins-when-upgrade-java-8-11/239236/3 "2020-07-28T08:11:03Z")
Closed on July 28, 2020, 8:11am UTC This topic was automatically closed 28 days after the last reply. New replies are no longer allowed.