# ES won't start up at all due to a Java issue

**URL:** https://discuss.elastic.co/t/es-wont-start-up-at-all-due-to-a-java-issue/60088
**Category:** Elasticsearch
**Created:** [September 8, 2016, 3:30pm UTC](https://discuss.elastic.co/t/es-wont-start-up-at-all-due-to-a-java-issue/60088 "2016-09-08T15:30:09Z")
**Posts on this page:** 3
**Page:** 1

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### Author: ![Dave\_Florek](https://avatars.discourse-cdn.com/v4/letter/d/71c47a/32.png) [@Dave\_Florek](https://discuss.elastic.co/u/Dave_Florek)
#### Post date: [September 8, 2016, 3:30pm UTC](https://discuss.elastic.co/t/es-wont-start-up-at-all-due-to-a-java-issue/60088/1 "2016-09-08T15:30:09Z")

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java.lang.IllegalArgumentException: Plugin [delete-by-query] is incompatible with Elasticsearch [2.4.0]. Was designed for version [2.3.5]

What do I do? Best to downgrade back to 2.3.5 until 2.4.0 becomes more stable?

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### 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: [September 8, 2016, 4:00pm UTC](https://discuss.elastic.co/t/es-wont-start-up-at-all-due-to-a-java-issue/60088/2 "2016-09-08T16:00:38Z")

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Upgrade the dele by query plugin. That's all what you need.

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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: [July 5, 2017, 10:21pm UTC](https://discuss.elastic.co/t/es-wont-start-up-at-all-due-to-a-java-issue/60088/3 "2017-07-05T22:21:46Z")

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