Index sorting in rollover request not supported?

[linkerc]

ES 7.3.0
I'm trying to issue rollover command with index sorting. But I'm getting status 400 with "reason": "unknown index sort field:[ts]"

This is my payload:

POST test/_rollover
{
    "conditions": {
    "max_size": "0gb"
  },
  "settings": {
    "index.number_of_shards": 2,
    "index.sort.field": "ts",
    "index.sort.order": "desc"
  },
  "mappings": {
    "properties": {
      "ts": {
        "type": "date"
      }
    }
  }
}

When the condition is not met, then it just returns good status with "conditions" rc set to false.
But if the condition is met (notice I use 0gb to test empty index), I'm getting the above error code.
If I remove the sort.field and sort.order in "settings", then the rollover api creates the new index.

[linkerc]

It looks like the "mappings" field is not applied for the rollover API.

[spinscale (Alexander Reelsen)]

you may want to take a look at index templates to always apply some mapping when a certain index gets created.

See https://www.elastic.co/guide/en/elasticsearch/reference/7.3/indices-templates.html

[spinscale (Alexander Reelsen)]

Actually I justed tested your example on 7.3.1 and it works as expected.

Can you show a full recreation including all the responses?

[linkerc]

 PUT test-000001
    {
      "aliases": {
      "test": {}
      }
    }

POST test/_rollover
{
  "conditions": {
    "max_size": "0gb"
  },
  "mappings": {
    "properties": {
      "ts": {
        "type": "date"
      }
    }
  },
  "settings": {
    "index.number_of_shards": 2,
    "index.sort.field": "ts",
    "index.sort.order": "desc"
  }
}

I might give 7.3.1 a try.

[linkerc]

Yup. Just confirmed 7.3.1 works.