# Error: Could not find or load main class org.elasticsearch.tools.JavaVersionChecker

**URL:** <https://discuss.elastic.co/t/error-could-not-find-or-load-main-class-org-elasticsearch-tools-javaversionchecker/296695>\
**Category:** Elasticsearch\
**Created:** [February 9, 2022, 9:02am UTC](https://discuss.elastic.co/t/error-could-not-find-or-load-main-class-org-elasticsearch-tools-javaversionchecker/296695 "2022-02-09T09:02:10Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![nadler](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/nadler/32/97461_2.png) [@nadler](https://discuss.elastic.co/u/nadler)\
**Post date:** [February 9, 2022, 9:02am UTC](https://discuss.elastic.co/t/error-could-not-find-or-load-main-class-org-elasticsearch-tools-javaversionchecker/296695/1 "2022-02-09T09:02:10Z")

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Hi,  
I have implemented an new cluster of elasticearch v7.12.0 with 6 nodes and two masters.  
After the servers were installed i saw that all of the Elasticsearch services are dead. When starting them i got: Error: Could not find or load main class org.Elasticsearch.tools.JavaVersionChecker.  
The java params are:  
JAVA\_HOME=/usr/lib/jvm/default-java  
java version "1.8.0\_152"  
Can you please assist me with this?

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<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [March 9, 2022, 9:02am UTC](https://discuss.elastic.co/t/error-could-not-find-or-load-main-class-org-elasticsearch-tools-javaversionchecker/296695/2 "2022-03-09T09:02:35Z")

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