Curator service failing after Elasticsearch upgrade to major version 9

[yogesh119905]

Type of issue

Missing information

What documentation page is affected

https://www.elastic.co/docs/reference/elasticsearch/curator/curator-ilm

What happened?

After upgrading Elasticsearch to version 9, we are using Elastic Curator 8.0.21. However, the Curator job fails to run and throws an error.
At this time, no information is available to confirm whether this Curator version is compatible with Elasticsearch 9.
Steps to Reproduce:

1. Upgrade Elasticsearch to version 9.
2. Run Curator (v8.0.21) with the existing configuration.
3. Observe the failure.

Expected Behavior:
Curator should execute successfully with the existing configuration after the Elasticsearch upgrade.

Actual Behavior:
Curator fails to run and returns an error.

Additional info

Impact:
Index management tasks cannot be automated through Curator.
Manual intervention is required, which may affect cluster maintenance.

[theletterf]

Thanks for reporting this, @yogesh119905. We'll soon review this issue and work on a solution. We appreciate your commitment to improving our documentation.

[shainaraskas]

Investigating

[shainaraskas]

Hi @yogesh119905! You can use this workaround to get curator 8.x working with Elasticsearch 9.x. We'll look into sharing this workaround in the docs.

[shainaraskas]

9 released