LosD commented on a change in pull request #229: Upgrade to Elasticsearch 7.3.1
URL: https://github.com/apache/metamodel/pull/229#discussion_r336509950
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File path:
elasticsearch/rest/src/main/java/org/apache/metamodel/elasticsearch/rest/ElasticSearchRestDataSet.java
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@@ -50,12 +50,15 @@ public ElasticSearchRestDataSet(final RestHighLevelClient
client, final SearchRe
@Override
public void closeNow() {
final String scrollId = _searchResponse.getScrollId();
- final ClearScrollRequest clearScrollRequest = new ClearScrollRequest();
- clearScrollRequest.addScrollId(scrollId);
- try {
- client.clearScroll((ClearScrollRequest) clearScrollRequest,
RequestOptions.DEFAULT);
- } catch (IOException e) {
- logger.warn("Could not clear scroll.", e);
+
+ if (scrollId != null) {
+ final ClearScrollRequest clearScrollRequest = new
ClearScrollRequest();
+ clearScrollRequest.addScrollId(scrollId);
+ try {
+ client.clearScroll((ClearScrollRequest) clearScrollRequest,
RequestOptions.DEFAULT);
+ } catch (final IOException e) {
+ logger.warn("Could not clear scroll.", e);
+ }
Review comment:
Is this a local operation, or does the scroll live on the server? If the
latter (as the "...Request" name seems to imply), isn't this a very expensive
operation, when it's not done in batches?
(sorry, it's been waaaaay too long ago that I touched ES)
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