# Issue with elastic search 5.0.0 - NoClassDefFoundError: org/apache/logging/log4j/Logger

**URL:** https://discuss.elastic.co/t/issue-with-elastic-search-5-0-0-noclassdeffounderror-org-apache-logging-log4j-logger/64262
**Category:** Elasticsearch
**Created:** [October 28, 2016, 8:36am UTC](https://discuss.elastic.co/t/issue-with-elastic-search-5-0-0-noclassdeffounderror-org-apache-logging-log4j-logger/64262 "2016-10-28T08:36:47Z")
**Posts on this page:** 1
**Showing post:** 2

<div class="post-metadata">

### Author: ![ywelsch](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/ywelsch/32/7751_2.png) [@ywelsch](https://discuss.elastic.co/u/ywelsch)
#### Post date: [October 28, 2016, 9:12am UTC](https://discuss.elastic.co/t/issue-with-elastic-search-5-0-0-noclassdeffounderror-org-apache-logging-log4j-logger/64262/2 "2016-10-28T09:12:10Z")

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You have to add logging dependencies:

```auto
        <dependency>
            <groupId>org.apache.logging.log4j</groupId>
            <artifactId>log4j-api</artifactId>
            <version>2.7</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.apache.logging.log4j</groupId>
            <artifactId>log4j-core</artifactId>
            <version>2.7</version>
            <scope>test</scope>
        </dependency>

```

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_[View the full topic](https://discuss.elastic.co/t/issue-with-elastic-search-5-0-0-noclassdeffounderror-org-apache-logging-log4j-logger/64262)._