tomvanbussel commented on a change in pull request #29772:
URL: https://github.com/apache/spark/pull/29772#discussion_r489506520
##########
File path:
core/src/main/java/org/apache/spark/util/collection/unsafe/sort/UnsafeExternalSorter.java
##########
@@ -516,32 +520,34 @@ public int getNumRecords() {
return numRecords;
}
+ @Override
+ public long getCurrentPageNumber() {
+ throw new UnsupportedOperationException();
+ }
+
public long spill() throws IOException {
synchronized (this) {
- if (!(upstream instanceof UnsafeInMemorySorter.SortedIterator &&
nextUpstream == null
- && numRecords > 0)) {
+ if (inMemSorter == null || numRecords <= 0) {
Review comment:
I think it was originally supposed to mean this, but it could also mean
that all records have been read. This is actually a bug as it would prevent
freeing the memory that's no longer necessary. I've kept this bug here to keep
the changelist as small as possible (there's a little bit more to this than
just removing the check). I'll address this issue in a separate ticket if
that's okay.
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