Elasticsearch聚合返回始终为空的存储桶[]（elasticsearch版本2.4.1）

Question

我有以下代码：

 final String index = ElasticSearchUtils.getIndexNameForExecution(queryId);
        SearchRequestBuilder query = client.prepareSearch(index);
        query.setTypes(indexType.toString());

        query.addAggregation(terms("errors").field("code").size(NUMBER_OF_HITS).order(Terms.Order.count(false)));

        int pageStart = getFrom(page) * size;
        SearchResponse response = query.setFrom(pageStart).setSize(getPageSize(size)).execute().actionGet();

        return response.toString();

部分响应是：

 { "took" : 78, "timed_out" : false, "_shards" : { "total" : 2, "successful" : 2, "failed" : 0 }, "hits" : { "total" : 2, "max_score" : 1.0, "hits" : [ { "_index" : "index_587e1e34e4b040c63c49137f", "_type" : "ERROR", "_id" : "AVmspgsKa7ZIkZu1p32G", "_score" : 1.0, "_source" : { "agent_id" : "{8668b249-9443-e611-87c6-005056aa41d1}", "_v" : "1", "host" : "RHEL65-X86-DEMO", "created_at" : "2017-01-17T13:37:58.496Z", "qid" : "587e1e34e4b040c63c49137f", "errors" : [ { "code" : 769, "module" : "FileHashing", "function" : "FindFiles" } ] } }, { "_index" : "index_587e1e34e4b040c63c49137f", "_type" : "ERROR", "_id" : "AVmspgsKa7ZIkZu1p32H", "_score" : 1.0, "_source" : { "agent_id" : "{7238f027-fbfc-47cf-85b0-c69838e26a2a}", "_v" : "1", "host" : "W8-X64-DEMO", "created_at" : "2017-01-17T13:37:58.501Z", "qid" : "587e1e34e4b040c63c49137f", "errors" : [ { "code" : 769, "module" : "FileHashing", "function" : "FindFiles" } ] } } ] }, "aggregations" : { "errors" : { "doc_count_error_upper_bound" : 0, "sum_other_doc_count" : 0, "buckets" : [ ] } } } And the result of search execution is: 

如您所见，存储桶为空[]，聚合不起作用，但是引发了任何异常。 这是在Elasticsearch 2.4.1中发生的，相同的代码在Elasticsearch 1.4.1中工作

Answer 1

您只需要修复此行

query.addAggregation(terms("errors").field("errors.code").size(NUMBER_OF_HITS).order(Terms.Order.count(false)));
                                              ^
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                                          add this