[BUG] When used the curl command to call the opensearch interface /_rollover to perform index rotation, the index did not rotate according to the rotation conditions of the passed parameters

[liuwz02]

Describe the bug

When I used the curl command to call the opensearch interface to perform index rotation, the index did not rotate according to the rotation conditions of the passed parameters. Here is my request:

curl -X POST "https://opensearch-master-headless.paas-middleware:9200/testindex/_rollover" -ku xxx:yyy -H 'Content-Type: application/json' -d '
{
  "conditions": {
    "max_docs": 1000
  },
  "settings": {
    "index.number_of_shards": 2,
    "index.number_of_replicas": 0
  }
}'

At the same time, I used the Java client to call the index rotation API, and the index did not rotate according to the rotation strategy.The code is as follows:

RolloverRequest request = new RolloverRequest("testindex", null);
request.addMaxIndexDocsCondition(1000);
request.getCreateIndexRequest().settings(Settings.builder()
        .put("index.number_of_shards", 2)
        .put("index.number_of_replicas", 0));
RolloverResponse rolloverResponse = client.indices().rollover(request, RequestOptions.DEFAULT);

Related component

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To Reproduce

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4. See error

Expected behavior

When any one or more rotation policies are passed in, including index size, number of documents, and maximum indexing time, the index rotates according to the policies.

Additional Details

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[peternied]

[Triage - attendees 1 2 3 4 5]
@liuwz02 Thanks for filing this issue, we would gladly review a pull request for this feature.

[rwali-aws]

[Triage - attendees 1 2 3]

Removing the ClusterManager label as the issue is related to Indexing

[prayascoriolis]

@liuwz02 have you checked for these conditions in which an index doesn't do rollover ? https://opensearch.org/docs/latest/im-plugin/ism/error-prevention/index/#rollover