解决 Elasticsearch 分页查询记录超过10000时异常

1. 问题一: 查询结果中 hits.total.value 值最大为10000的限制

   解决方法:
   请求时设置 "track_total_hits": true

   1. Rest 请求设置方法:

   curl -X POST "http://192.168.1.101:9200/my_index/_search?pretty" -H 'Content-Type: application/json' -d'
   {
     "track_total_hits": true
     "query": {
       "match_all": {}
     },
     "sort": [
       {
         "timestamp": {
           "order": "desc"
         }
       }
     ]
   }
   '
   

   2. API 设置方法:

   SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder().trackTotalHits(true);
   

2. 问题二: 分页查询 from 大于 10000 时的数据异常

   异常信息

   ...
   Caused by: ElasticsearchException[Elasticsearch exception [type=illegal_argument_exception, reason=Result window is too large, from + size must be less than or equal to: [10000] but was [10100]. See the scroll api for a more efficient way to request large data sets. This limit can be set by changing the [index.max_result_window] index level setting.]]; nested: ElasticsearchException[Elasticsearch exception [type=illegal_argument_exception, reason=Result window is too large, from + size must be less than or equal to: [10000] but was [10100]. See the scroll api for a more efficient way to request large data sets. This limit can be set by changing the [index.max_result_window] index level setting.]];
   ...
   

   解决方法:
   修改 max_result_window 设置的最大索引值，注意以 put 方式提交

   curl -X PUT "http://192.168.1.101:9200/my_index/_settings?pretty" -H 'Content-Type: application/json' -d'
   {
     "index":{
       "max_result_window":1000000
     }
   }
   '