mwkang commented on code in PR #6900:
URL: https://github.com/apache/hbase/pull/6900#discussion_r2061317671
##########
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/StoreScanner.java:
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@@ -832,7 +845,7 @@ private void updateMetricsStore(boolean memstoreRead) {
* @return null is the top cell doesn't change. Otherwise, the NextState to
return
*/
private NextState needToReturn(List<? super ExtendedCell> outResult) {
- if (!outResult.isEmpty() && topChanged) {
+ if (topChanged) {
Review Comment:
Thanks again for the detailed review and your follow-up questions — I really
appreciate it.
I feel that my earlier explanation may not have been clear enough.
To clarify: the main issue is not with partial results, but rather with **a
single row being split into two separate results**.
This split happens because after a topChanged event, if outResult is empty,
StoreScanner doesn't correctly detect that the row has changed.
(Upon reflecting on our [previous
discussion](https://github.com/apache/hbase/pull/6900#discussion_r2039658867),
I realized that my initial explanation may not have been as clear as it should
have been. When I first encountered this issue, I thought it was related to
partial results, which is why I initially mentioned that in
[thread](https://lists.apache.org/thread/2wj5rq922lfxj37ohk5ctr42bn9pyrl4).
However, after further debugging, the core issue is actually that a single row
is being split into two separate Results. I apologize if my earlier explanation
was confusing, and I'm sorry for not making this clearer sooner.)
I’ve [already added a reproducible test
case](https://github.com/apache/hbase/pull/6900#discussion_r2051976496)
([TestTopChanged.testTopChanged](https://github.com/mwkang/hbase/blob/feature/bug-demo-HBASE-29254/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestTopChanged.java)
in the [feature/bug-demo-HBASE-29254
branch](https://github.com/mwkang/hbase/tree/feature/bug-demo-HBASE-29254)) to
demonstrate this behavior.
Please let me know if there’s anything else you would like me to work on to
help move this forward.
Thanks again for your time and support!
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