xiangfu0 commented on code in PR #8846:
URL: https://github.com/apache/pinot/pull/8846#discussion_r901020485


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pinot-segment-local/src/main/java/org/apache/pinot/segment/local/segment/creator/impl/stats/LongColumnPreIndexStatsCollector.java:
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@@ -100,8 +97,11 @@ public int getCardinality() {
 
   @Override
   public void seal() {
-    _sortedValues = _values.toLongArray();
-    Arrays.sort(_sortedValues);
-    _sealed = true;
+    if (!_sealed) {

Review Comment:
   If there is no sorting after seal, we should also throw exception in 
collect(Object) if _sealed=true to avoid any unexpected behavior.



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