[BUG] OpenSearchNodesClient#info is unable to parse custom roles

[dennisoelkers]

What is the bug?

When a node exists in the cluster having a (custom) role which is not listed in NodeRole, executing OpenSearchClient#nodes#info fails with a JsonParsingException: Invalid enum 'customrole'.

How can one reproduce the bug?

Start a node in the cluster with a custom role.

What is the expected behavior?

OpenSearchClient#nodes#info should succeed, either stripping the custom role from the list of roles of that node, or returning a collection of strings instead of enums.

What is your host/environment?

Operating system, version.

Do you have any screenshots?

If applicable, add screenshots to help explain your problem.

Do you have any additional context?

Add any other context about the problem.

[dennisoelkers]

Btw, this also happens when the search role is added, as suggested here.

[dennisoelkers]

@dblock, @reta: Is this of any relevance for the team? This is blocking adoption of the client for us and there is no response from maintainers of the client yet. We are wondering if deprecating the previous client is a little bit premature?

[reta]

@dennisoelkers we would greatly appreciate a pull request for this issue, if you are up to it, thank you!