[ERROR][elasticsearch-service] Unable to retrieve version information from Elasticsearch nodes. self signed certificate in certificate chain

This error message indicates that the Elasticsearch nodes are using a self-signed SSL certificate, which is not trusted by the client making the request.

To resolve this issue, you can do one of the following:

1. Add the self-signed certificate to the trusted certificate store of the client making the request. This will vary depending on the client and operating system being used.

2. Disable SSL verification on the client side. This is not recommended for production environments as it can leave your system vulnerable to man-in-the-middle attacks.

3. Replace the self-signed certificate with a trusted SSL certificate issued by a trusted Certificate Authority (CA). This is the recommended solution for production environments.

Once the SSL certificate issue is resolved, the Elasticsearch nodes should be able to retrieve version information without any errors.