ElasticSearch: High Level Client Search Scrolling

In this tutorial I will show you how to perform a search scroll using the high level client. If you have not already done so please follow the search tutorial.

The reason you following the search tutorial first is that sets up the search. So you just have to do a few more steps.

Imports:

import org.elasticsearch.action.search.SearchScrollRequest;
import org.elasticsearch.common.unit.TimeValue;

Modify the “SearchRequest”. A recommended timeout is 60000 or 1m.

request.scroll(new TimeValue(60000));

Once you perform the initial search now you will get a “scrollId”. Use that to generate your new “SearchScrollRequest” using that scrollId. One thing to note is the “scrollRequest” timeout value. Set this or it may not work.

final SearchScrollRequest searchScrollRequest = new SearchScrollRequest(scrollId);
searchScrollRequest.scroll(new TimeValue(60000));

Now the searchResponse that we used initially we can repurpose to continue scrolling the results.

searchResponse = client.searchScroll(searchScrollRequest);

We know that their are no more results when the scrollId is null or when getHits length is 0.

searchResponse.getHits().getHits().length > 0