写入 ES 嵌套文档超限（默认10000个）如何处理？

今天商品同步ES 计划任务报错：

The number of nested documents has exceeded the allowed limit of [10000]. 
This limit can be set by changing the [index.mapping.nested_objects.limit] index level setting.

查看该商品款式（Color，Size, ... 排列组合）较多，每个款式下都配了十几张的图片，这些款式及图片都以嵌套文档的方式写入了ES，导致写入ES的嵌套文档总数超限。

官方对 index.mapping.nested_objects.limit 的介绍：

https://www.elastic.co/guide/en/elasticsearch/reference/current/mapping-settings-limit.html

处理方法：

跟据官方文档描述，修改 index.mapping.nested_objects.limit 配置项即可

新建索引时指定

PUT /xxxxx
{
  "settings": {
    "index.mapping.nested_objects.limit": 60000,
    "number_of_shards": 5,
    "number_of_replicas": 2
  },
  "mappings": {
    ...
  }
}

对已存存的索引进宪修改

PUT xxxx/_settings
{
  "index.mapping.nested_objects.limit": 60000
}