jackjlli commented on code in PR #12347:
URL: https://github.com/apache/pinot/pull/12347#discussion_r1477202071
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pinot-core/src/main/java/org/apache/pinot/core/query/aggregation/function/DistinctCountRawThetaSketchAggregationFunction.java:
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@@ -53,7 +53,8 @@ public String extractFinalResult(List<ThetaSketchAccumulator>
accumulators) {
int numAccumulators = accumulators.size();
List<Sketch> mergedSketches = new ArrayList<>(numAccumulators);
- for (ThetaSketchAccumulator accumulator : accumulators) {
+ for (Object object : accumulators) {
Review Comment:
Good question! It could be possible that there is only 1 old server
returning a non-empty intermediate result, which skipped the merge step in
broker.
I've tested this code by setting up a local cluster and running 2 servers
with old version and 1 broker with new version, and I don't see exception any
more. So we should be good with this hotfix PR.
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