Ngone51 commented on a change in pull request #27246:
URL: https://github.com/apache/spark/pull/27246#discussion_r443429947
##########
File path:
core/src/main/java/org/apache/spark/util/collection/unsafe/sort/UnsafeExternalSorter.java
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@@ -681,20 +681,19 @@ private void moveOver(UnsafeSorterIterator iter, int
steps)
ChainedIterator(Queue<UnsafeSorterIterator> iterators) {
assert iterators.size() > 0;
this.numRecords = 0;
- for (UnsafeSorterIterator iter: iterators) {
- this.numRecords += iter.getNumRecords();
- }
this.iterators = iterators;
- this.current = iterators.remove();
+ this.current = null;
Review comment:
this is not necessary?
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