Elasticsearch7 exception [type=illegal_argument_exception, reason=Limit of total fields [1000]

Elasticsearch exception [type=illegal_argument_exception, reason=Limit of total fields [1000] has been exceeded]

chatgpt4 answer:
The error message you’re encountering is caused by an Elasticsearch limitation, which by default allows only up to 1,000 fields in an index. When you exceed this number, Elasticsearch throws an illegal_argument_exception error with the reason: “Limit of total fields [1000] has been exceeded.”

To fix this issue, you can either:

Increase the limit of total fields by updating the index settings:

PUT your_index_name/_settings
{
  "index.mapping.total_fields.limit": 2000
}

Replace your_index_name with the name of your actual index, and set the new limit to an appropriate value (e.g., 2000 in this example).

Reconsider your index design:
If you find yourself needing a significantly higher number of fields, it might be a sign that your index design needs to be revisited. It is often more efficient to have separate indices for different data types or entities, rather than trying to store all information in a single index.

You can also consider using nested objects or flattened object data types for fields with a large number of sub-fields. This helps you to better manage and control the number of fields in your index.

Finally, always remember to clean up unnecessary fields in your documents to avoid hitting the field limit.

即可以修改index默认的配置，增加单个索引的字段限制