---
title: NoClassDefFoundError: org/apache/commons/logging/LogFactory
description: Check the Known Issues 
url: https://www.elastic.co/docs/reference/elasticsearch/clients/java/troubleshooting/no-class-def-found-error
products:
  - Elasticsearch
  - Elasticsearch Client
  - Elasticsearch Java Client
---

# NoClassDefFoundError: org/apache/commons/logging/LogFactory
Check the [Known Issues](/docs/release-notes/elasticsearch/clients/java/known-issues#known-issues-9-0-0)