# Logstash 7.16.2(fixed Log4j2 Vulnerability) connected to ElasticSearch 7.6.2 failed

**URL:** <https://discuss.elastic.co/t/logstash-7-16-2-fixed-log4j2-vulnerability-connected-to-elasticsearch-7-6-2-failed/292945>\
**Category:** Logstash\
**Created:** [December 27, 2021, 2:39am UTC](https://discuss.elastic.co/t/logstash-7-16-2-fixed-log4j2-vulnerability-connected-to-elasticsearch-7-6-2-failed/292945 "2021-12-27T02:39:29Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![Badger](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/badger/32/25190_2.png) [@Badger](https://discuss.elastic.co/u/Badger)\
**Post date:** [December 27, 2021, 2:55am UTC](https://discuss.elastic.co/t/logstash-7-16-2-fixed-log4j2-vulnerability-connected-to-elasticsearch-7-6-2-failed/292945/2 "2021-12-27T02:55:25Z")

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That might be [this](https://discuss.elastic.co/t/logstash-not-start-after-upgrade-to-new-version/291849) issue. With 7.15 OSS stopped being a drop-in replacement for Elastic.

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_[View the full topic](https://discuss.elastic.co/t/logstash-7-16-2-fixed-log4j2-vulnerability-connected-to-elasticsearch-7-6-2-failed/292945)._