# Jar hell?

**URL:** <https://discuss.elastic.co/t/jar-hell/149431>\
**Category:** Elasticsearch\
**Created:** [September 21, 2018, 10:40am UTC](https://discuss.elastic.co/t/jar-hell/149431 "2018-09-21T10:40:52Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![ping\_luo](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/ping_luo/32/46063_2.png) [@ping\_luo](https://discuss.elastic.co/u/ping_luo)\
**Post date:** [September 21, 2018, 10:40am UTC](https://discuss.elastic.co/t/jar-hell/149431/1 "2018-09-21T10:40:53Z")

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when i install a Customized plugin on elasticsearch, i got this error, it's so puzzled

```auto
Caused by: java.lang.IllegalStateException: jar hell!
class: org.joda.time.base.AbstractDateTime
jar1: /usr/share/elasticsearch/plugins/.installing-13215268030509420441/joda-time-2.9.9.jar
jar2: /usr/share/elasticsearch/lib/joda-time-2.9.9.jar
	at org.elasticsearch.bootstrap.JarHell.checkClass(JarHell.java:275)
	at org.elasticsearch.bootstrap.JarHell.checkJarHell(JarHell.java:192)
	at org.elasticsearch.plugins.PluginsService.checkBundleJarHell(PluginsService.java:473)
	... 12 more

```

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<div class="post-metadata">

**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 21, 2018, 11:06am UTC](https://discuss.elastic.co/t/jar-hell/149431/2 "2018-09-21T11:06:50Z")

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Don't include joda-time in your plugin as it's already provided by elasticsearch.

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<div class="post-metadata">

**Author:** ![ping\_luo](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/ping_luo/32/46063_2.png) [@ping\_luo](https://discuss.elastic.co/u/ping_luo)\
**Post date:** [September 26, 2018, 1:39am UTC](https://discuss.elastic.co/t/jar-hell/149431/3 "2018-09-26T01:39:50Z")

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it's work, thanks a lot

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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:** [October 24, 2018, 1:40am UTC](https://discuss.elastic.co/t/jar-hell/149431/4 "2018-10-24T01:40:00Z")

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