Elasticsearch Version

8.13.x

• Java Version: bundled

• OS Version: N/A (different k8s versions)

Problem Description

ECK operator 2.12.1 fails upgrading Elasticsearch 8.13+ as it is stalled on the following error when calling the desired nodes API:

400 Bad Request: {
    Reason: [node_version] field is required and must have a valid value 
    Type: x_content_parse_exception
    ...
}

Steps to Reproduce

The steps should be (not tested yet):

• Deploy ECK 2.12.1+
• Deploy Elasticsearch 8.11.x?
• Upgrade to Elasticsearch 8.13+

Notes

Note: this is from ECK 2.12.1 that the operator stops to use the deprecated node_version field if the cluster is 8.13+:

• Move desired nodes version gate in the client cloud-on-k8s#7663

Two occurences of this issue have been reported for these versions upgrades:

• 8.11.x -> 8.13.3
• 8.11.4 -> 8.13.2

Each time, the users confirmed that:

• some nodes did not have desired_node.version_deprecated feature
• a restart fixes the issue