This documentation contains work-in-progress information for future Elastic Stack and Cloud releases. Use the version selector to view supported release docs. It also contains some Elastic Cloud serverless information. Check out our serverless docs for more details.
If you are upgrading from Logstash 6.2.x or any earlier version (including 5.x) and have the persistent queue enabled, we strongly recommend that you drain or delete the persistent queue before you upgrade. See Draining the queue for information and instructions.