elasticsearchwriter对 es7.9.2 版本settings不生效

使用elasticsearchwriter往 elasticsearch7.9.2 版本写数据， settings配置没有生效
elasticsearch 版本 7.9.2
datax配置：
"writer": {
"name": "elasticsearchwriter",
"parameter": {
"endpoint": "http://XXXX:9200",
"accessId": "xxxx",
"accessKey": "xxxx",
"index": "XXXXX",
"type": "_doc",
"cleanup": true,
"settings": {"index": {"number_of_shards": 2, "number_of_replicas": 0}},
"column": [
{"name": "company_id", "type": "integer"},
{ "name": "company_nm","type": "text" }
],
"discovery": false,
"dynamic": false,
"batchSize": 1000
}
}
}

Start by reproducing the reported DataX elasticsearchwriter configuration against Elasticsearch 7.9.2, then trace how the writer handles the supplied settings object. Done means the configured shard and replica settings are applied when the index is created.

Written by the indexing model from the issue text.