SearchRequest searchRequest = new SearchRequest(indexArr); searchRequest.source(searchSourceBuilder); TimeValue seconds = TimeValue.timeValueSeconds(30); Scroll scroll = new Scroll(seconds); searchRequest.scroll(scroll);

这是一段Java代码，主要是用于向Elasticsearch发起一个Scroll查询请求。其中，indexArr表示要查询的索引，searchSourceBuilder是一个查询条件的构建器，seconds表示查询结果的有效时间为30秒。

在Elasticsearch中，Scroll查询可以用于处理大量数据，它可以在查询结果集中维持一个快照，并且可以分批次地将结果返回。这样可以有效地避免一次性加载过多数据导致内存不足的问题。

相关问题

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.] java代码es解决方法

这个问题是由于您请求的结果窗口超过了Elasticsearch的默认限制导致的。解决方法是使用滚动API来请求大数据集，而不是一次性获取所有结果。

下面是使用滚动API来解决这个问题的Java代码示例：

import org.elasticsearch.action.search.ClearScrollRequest;
import org.elasticsearch.action.search.ClearScrollResponse;
import org.elasticsearch.action.search.SearchRequest;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.action.search.SearchScrollRequest;
import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.common.unit.TimeValue;
import org.elasticsearch.index.query.QueryBuilders;
import org.elasticsearch.search.Scroll;
import org.elasticsearch.search.SearchHit;
import org.elasticsearch.search.builder.SearchSourceBuilder;

import java.io.IOException;

public class ElasticsearchScrollExample {
    private static final String INDEX_NAME = "your_index_name";
    private static final int BATCH_SIZE = 1000;

    public void scrollSearch(RestHighLevelClient client) throws IOException {
        // 创建初始搜索请求
        SearchRequest searchRequest = new SearchRequest(INDEX_NAME);
        SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
        searchSourceBuilder.query(QueryBuilders.matchAllQuery());
        searchSourceBuilder.size(BATCH_SIZE);
        searchRequest.source(searchSourceBuilder);
        searchRequest.scroll(TimeValue.timeValueMinutes(1L));

        // 执行搜索请求
        SearchResponse searchResponse = client.search(searchRequest, RequestOptions.DEFAULT);
        String scrollId = searchResponse.getScrollId();
        SearchHit[] searchHits = searchResponse.getHits().getHits();

        while (searchHits != null && searchHits.length > 0) {
            // 处理搜索结果
            for (SearchHit hit : searchHits) {
                // 处理每个搜索结果
            }

            // 创建滚动请求
            SearchScrollRequest scrollRequest = new SearchScrollRequest(scrollId);
            scrollRequest.scroll(TimeValue.timeValueMinutes(1L));

            // 执行滚动请求
            searchResponse = client.scroll(scrollRequest, RequestOptions.DEFAULT);
            scrollId = searchResponse.getScrollId();
            searchHits = searchResponse.getHits().getHits();
        }

        // 清除滚动上下文
        ClearScrollRequest clearScrollRequest = new ClearScrollRequest();
        clearScrollRequest.addScrollId(scrollId);
        ClearScrollResponse clearScrollResponse = client.clearScroll(clearScrollRequest, RequestOptions.DEFAULT);
        boolean succeeded = clearScrollResponse.isSucceeded();
    }
}

以上代码使用了Elasticsearch的Java高级客户端来执行滚动搜索。您需要将`your_index_name`替换为您要搜索的索引名称，并根据需要调整`BATCH_SIZE`来设置每次获取的结果数量。

我想用searchSourceBuilder参数怎么实现 searchResponse.getHits().getHits()只有一万条，我想获取全部的数据

你可以通过设置searchSourceBuilder的size参数来设置每次获取的结果数量，同时使用searchAfter来获取下一页的数据。以下是一个使用searchSourceBuilder获取所有数据的示例代码：

SearchRequest searchRequest = new SearchRequest("your_index");
SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
searchSourceBuilder.query(QueryBuilders.termQuery("field", "value"));
searchSourceBuilder.size(100); //设置每次获取的结果数量
searchRequest.source(searchSourceBuilder);

SearchResponse searchResponse = client.search(searchRequest, RequestOptions.DEFAULT);
while (searchResponse.getHits().getHits().length != 0) {
    SearchHit[] hits = searchResponse.getHits().getHits();
    for (SearchHit hit : hits) {
        // 处理每个搜索命中(SearchHit)
    }
    String scrollId = searchResponse.getScrollId();
    SearchScrollRequest scrollRequest = new SearchScrollRequest(scrollId);
    scrollRequest.scroll(TimeValue.timeValueMinutes(1L));
    searchResponse = client.scroll(scrollRequest, RequestOptions.DEFAULT);
}

在上面的代码示例中，设置了searchSourceBuilder的size参数为100，即每次获取100条结果。在while循环中，使用searchAfter获取下一页的数据，并处理每个搜索命中(SearchHit)。需要注意的是，使用searchAfter获取下一页数据时，需要按照上一页最后一条数据的排序字段值进行排序。具体的排序方式可以在searchSourceBuilder中设置。另外，使用searchAfter获取下一页数据时，需要在每一次请求中设置上一页的排序字段值和ID，以便正确地获取下一页数据。