Kibana known issues

Details
Starting from version 9.0.0, HTTP/2 is the default protocol when TLS is enabled. This ensures improved performance and security. However, if HTTP/2 is not enabled or TLS is not configured, a deprecation warning will be added.

For more information, refer to #204384.

Impact
Systems that have TLS enabled but don’t specify a protocol will start using HTTP/2 in 9.0.0. Systems that use HTTP/1 or don’t have TLS configured will get a deprecation warning.

Action
Verify that TLS is properly configured by enabling it and providing valid certificates in the settings. Test your system to ensure that connections are established securely over HTTP/2.

If your Kibana server is hosted behind a load balancer or reverse proxy we recommend testing your deployment configuration before upgrading to 9.0.

Details
Starting from version 9.0.0, search sessions are disabled by default. To view, manage, and restore search sessions, the feature needs to be explicitly re-enabled.

Impact
Search sessions will be disabled unless they are explicitly enabled in config.yml.

Action
If you would like to continue using, managing, and restoring search sessions in 9.0, you’ll need to re-enable the feature in your kibana.yml configuration file. If not, no action is necessary.

To re-enable search sessions, add the following in your config.yml:

data.search.sessions.enabled: true