replace parallelQuickSort with mergeSort
Parallel quick sort fails because Table Row is not thread safe.
@@ -656,7 +656,7 @@ public class Table extends Relation implements Iterable<Row> {
Table newTable = emptyCopy(rowCount());
int[] newRows = rows();
- IntArrays.parallelQuickSort(newRows, rowComparator);
+ IntArrays.mergeSort(newRows, rowComparator);
Rows.copyRowsToTable(newRows, this, newTable);
return newTable;
