[BUG] org.opensearch.client.util.MissingRequiredPropertyException: Missing required property 'DataPathStats.mount'

[KaueMoura]

What is the bug?

When a try to get node stats information the exception is thrown.
org.opensearch.client.util.MissingRequiredPropertyException: Missing required property 'DataPathStats.mount'

How can one reproduce the bug?

Just get a Opensearch client object and execute this code example.

final OpenSearchClient opClient = OpensearchFactory.getInstance();
final OpenSearchNodesClient nodes = opClient.nodes();
final NodesStatsResponse stats = nodes.stats();  // <- Exception here
System.out.println(stats.nodeStats().total());
System.out.println(stats.nodeStats().successful());
System.out.println(stats.nodeStats().failed());

What is the expected behavior?

I would like to run this code in order to get part of the information from the JSON returned in the node stats api.
Request: GET _nodes/stats

"_nodes": {
    "total": 1,
    "successful": 1,
    "failed": 0
},[...]

What is your host/environment?

opensearch-java client version
2.8.4

OpenSearch version
2.11 (Amazon OpenSearch Service)

[dennisoelkers]

Refs #894.

[bubkoltet]

Issue still present in opensearch-java-client 2.16.0 and AWS OpenSearch 2.15.