jinchengchenghh commented on issue #6527:
URL:
https://github.com/apache/incubator-gluten/issues/6527#issuecomment-2241945758
It failed here
```
final UnsafeSorterSpillWriter spillWriter =
new UnsafeSorterSpillWriter(blockManager, fileBufferSizeBytes,
writeMetrics,
inMemSorter.numRecords());
spillWriters.add(spillWriter);
spillIterator(inMemSorter.getSortedIterator(), spillWriter);
```
numRecords is inMemSorter.numRecords() (pos / 2), numRecordToWrite is
inMemSorter.getSortedIterator().length(), it is in function
`UnsafeSorterIterator.getSortedIterator()`
with null
```
queue.add(new SortedIterator(nullBoundaryPos / 2, 0));
queue.add(new SortedIterator((pos - nullBoundaryPos) / 2, offset));
UnsafeExternalSorter.ChainedIterator(queue)
```
without null
```
return new SortedIterator(pos / 2, offset)
```
nullBoundaryPos and pos are even.
So it should always spill all the records in inMemSorter, I don't known why
the error throws.
Does the customer change the Spark logic?
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