Github user jihoonson commented on a diff in the pull request:
https://github.com/apache/tajo/pull/671#discussion_r39039858
--- Diff:
tajo-client/src/main/java/org/apache/tajo/jdbc/FetchResultSet.java ---
@@ -25,11 +25,13 @@
import java.io.IOException;
import java.sql.SQLException;
+import java.util.concurrent.Future;
public class FetchResultSet extends TajoResultSetBase {
protected QueryClient tajoClient;
private int fetchRowNum;
private TajoMemoryResultSet currentResultSet;
+ private Future<TajoMemoryResultSet> nextResultSet;
--- End diff --
It looks that ```nextResultSet``` should also be closed when
FetchResultSet.close() is called.
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