Github user xubo245 commented on a diff in the pull request:
https://github.com/apache/carbondata/pull/2944#discussion_r235835645
--- Diff:
core/src/main/java/org/apache/carbondata/core/scan/processor/DataBlockIterator.java
---
@@ -262,6 +262,7 @@ public void close() {
if (blockletScannedResult != null) {
blockletScannedResult.freeMemory();
}
+ future=null;
--- End diff --
please add white space before/after =---
