elasticsearch 报错 Result window is too large 解决方案

我在使用 Elasticsearch 进行search 查询的过程中，出现了 Result window is too large 问题。

这里简单做一个报错复现：

In [1]: import requests
In [2]: requests.get('http://127.0.0.1:9200/cmdb-now/_search?page=1&size=10000000').json()
Out[2]:
{u'error': {u'failed_shards': [{u'index': u'cmdb-now',
    u'node': u'ldeZMZRAR6uZpAiIr5QxBQ',
    u'reason': {u'reason': u'Result window is too large, from + size must be less than or equal to: [10000] but was [10000000]. 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 parameter.',
     u'type': u'query_phase_execution_exception'},
    u'shard': 0}],
  u'grouped': True,
  u'phase': u'query',
  u'reason': u'all shards failed',
  u'root_cause': [{u'reason': u'Result window is too large, from + size must be less than or equal to: [10000] but was [10000000]. 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 parameter.',
    u'type': u'query_phase_execution_exception'}],
  u'type': u'search_phase_execution_exception'},
 u'status': 500}

从上面的报错信息，可以看到ES提示我结果窗口太大了，目前最大值为10000，而我却要求给我10000000。并且在后面也提到了要求我修改index.max_result_window参数来增大结果窗口大小。

我google了修改方法，命令如下：

curl -XPUT http://127.0.0.1:9200/cmdb-now/_settings -d '{ "index" : { "max_result_window" : 100000000}}'

cmdb-now 是我ES索引的名字。

有关官方针对 index 的相关配置介绍，可以点击这里进行查看。