# Changes from v2.3.5 to 5.1.1

**URL:** <https://discuss.elastic.co/t/changes-from-v2-3-5-to-5-1-1/72459>\
**Category:** Elasticsearch\
**Created:** [January 23, 2017, 9:52am UTC](https://discuss.elastic.co/t/changes-from-v2-3-5-to-5-1-1/72459 "2017-01-23T09:52:26Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![guybarnea](https://avatars.discourse-cdn.com/v4/letter/g/91b2a8/32.png) [@guybarnea](https://discuss.elastic.co/u/guybarnea)\
**Post date:** [January 23, 2017, 9:52am UTC](https://discuss.elastic.co/t/changes-from-v2-3-5-to-5-1-1/72459/1 "2017-01-23T09:52:26Z")

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hello,  
i have a plugin that workes fine in version 2.3.5.  
we have to make changes in plugin's jar file , in order to succeeded install it in v5.1.1.  
when we try to run the elasticsearch , we get an error.  
can i get the changes between those two versions?  
it may help me resolve the problem.

the error is the following:

ElasticsearchUncaughtExceptionHandler] [] fatal error in thread [main], exiting java.lang.NoClassDefFoundError: org/elasticsearch/index/analysis/AnalysisModule$AnalysisBinderProcessor

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**Author:** ![GyllingSW](https://avatars.discourse-cdn.com/v4/letter/g/6f9a4e/32.png) [@GyllingSW](https://discuss.elastic.co/u/GyllingSW)\
**Post date:** [January 23, 2017, 11:47am UTC](https://discuss.elastic.co/t/changes-from-v2-3-5-to-5-1-1/72459/2 "2017-01-23T11:47:11Z")

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Check out changes here:  
[https://www.elastic.co/guide/en/elasticsearch/reference/current/breaking-changes-5.1.html#breaking\_51\_java\_api\_changes](https://www.elastic.co/guide/en/elasticsearch/reference/current/breaking-changes-5.1.html#breaking_51_java_api_changes)

Basically this would be a compile time error in any recent Java IDE.

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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, 11:47am UTC](https://discuss.elastic.co/t/changes-from-v2-3-5-to-5-1-1/72459/3 "2017-02-20T11:47:26Z")

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Closed on February 20, 2017, 11:47am UTC

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