# Testing connection with Elasticsearch failed due to exception java.util.concurrent.CompletionException: java.net.ConnectException: Connection refused: no further information

**URL:** <https://discuss.elastic.co/t/testing-connection-with-elasticsearch-failed-due-to-exception-java-util-concurrent-completionexception-java-net-connectexception-connection-refused-no-further-information/83513>\
**Category:** Elasticsearch\
**Created:** [April 25, 2017, 8:08am UTC](https://discuss.elastic.co/t/testing-connection-with-elasticsearch-failed-due-to-exception-java-util-concurrent-completionexception-java-net-connectexception-connection-refused-no-further-information/83513 "2017-04-25T08:08:18Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**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:** [April 25, 2017, 8:37am UTC](https://discuss.elastic.co/t/testing-connection-with-elasticsearch-failed-due-to-exception-java-util-concurrent-completionexception-java-net-connectexception-connection-refused-no-further-information/83513/2 "2017-04-25T08:37:53Z")

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There is absolutely no code in the stacktrace coming from elasticsearch.

> Connection refused

Is probably the important message here. Check if elasticsearch is running and if port 9200 is accessible from your machine.

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_[View the full topic](https://discuss.elastic.co/t/testing-connection-with-elasticsearch-failed-due-to-exception-java-util-concurrent-completionexception-java-net-connectexception-connection-refused-no-further-information/83513)._