siknezevic commented on a change in pull request #27246:
URL: https://github.com/apache/spark/pull/27246#discussion_r436226277
##########
File path:
core/src/main/java/org/apache/spark/util/collection/unsafe/sort/UnsafeExternalSorter.java
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@@ -720,5 +720,14 @@ public void loadNext() throws IOException {
@Override
public long getKeyPrefix() { return current.getKeyPrefix(); }
+
+ private void initializeNumRecords() throws IOException {
+ if (numRecords == 0) {
+ for (UnsafeSorterIterator iter: iterators) {
+ numRecords += iter.getNumRecords();
+ }
+ numRecords += current.getNumRecords();
+ }
+ }
Review comment:
Thank you for the suggestion. It make sense. I will do it and test it.
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