# Hi,i have a problem with NoClassDefFoundError: org/elasticsearch/xpack/XPackPlugin

**URL:** https://discuss.elastic.co/t/hi-i-have-a-problem-with-noclassdeffounderror-org-elasticsearch-xpack-xpackplugin/72425
**Category:** Elasticsearch
**Created:** [January 23, 2017, 3:07am UTC](https://discuss.elastic.co/t/hi-i-have-a-problem-with-noclassdeffounderror-org-elasticsearch-xpack-xpackplugin/72425 "2017-01-23T03:07:12Z")
**Posts on this page:** 4
**Page:** 1

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### Author: ![syf](https://avatars.discourse-cdn.com/v4/letter/s/7feea3/32.png) [@syf](https://discuss.elastic.co/u/syf)
#### Post date: [January 23, 2017, 3:07am UTC](https://discuss.elastic.co/t/hi-i-have-a-problem-with-noclassdeffounderror-org-elasticsearch-xpack-xpackplugin/72425/1 "2017-01-23T03:07:12Z")

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java.lang.NoClassDefFoundError: org/elasticsearch/xpack/XPackPlugin,i try to solve it ,but i can't ,anyone could help me

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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: [January 23, 2017, 7:42am UTC](https://discuss.elastic.co/t/hi-i-have-a-problem-with-noclassdeffounderror-org-elasticsearch-xpack-xpackplugin/72425/2 "2017-01-23T07:42:46Z")

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What are you doing?

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### Author: ![syf](https://avatars.discourse-cdn.com/v4/letter/s/7feea3/32.png) [@syf](https://discuss.elastic.co/u/syf)
#### Post date: [January 23, 2017, 9:20am UTC](https://discuss.elastic.co/t/hi-i-have-a-problem-with-noclassdeffounderror-org-elasticsearch-xpack-xpackplugin/72425/3 "2017-01-23T09:20:57Z")

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I want to make my essay index datebase ?and i configure x-pack in my elasticSearch ,,when i create PreBuiltXPackTransportClient client ,there is a error java.lang.NoClassDefFoundError: org/elasticsearch/xpack/XPackPlugin,and i could solve the problem ,by the way ,do you have a java document about  
elasticsearch .and u can send to me ,my email [syf\_5566@163.com](mailto:syf_5566@163.com) .i don't know how to analyze aan essay.

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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 20, 2017, 9:21am UTC](https://discuss.elastic.co/t/hi-i-have-a-problem-with-noclassdeffounderror-org-elasticsearch-xpack-xpackplugin/72425/4 "2017-02-20T09:21:00Z")

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