gortiz commented on code in PR #13035:
URL: https://github.com/apache/pinot/pull/13035#discussion_r1628906266
##########
pinot-query-runtime/src/main/java/org/apache/pinot/query/runtime/plan/MultiStageQueryStats.java:
##########
@@ -284,14 +284,18 @@ public void mergeUpstream(List<ByteBuffer> otherStats) {
myStats.merge(dis);
}
} catch (IOException ex) {
- LOGGER.warn("Error deserializing stats on stage {}. Considering the
new stats empty", i, ex);
+ LOGGER.warn("Error deserializing stats on stage " + i + ".
Considering the new stats empty", ex);
} catch (IllegalArgumentException | IllegalStateException ex) {
- LOGGER.warn("Error merging stats on stage {}. Ignoring the new
stats", i, ex);
+ LOGGER.warn("Error merging stats on stage " + i + ". Ignoring the
new stats", ex);
}
}
}
}
+ public List<StageStats.Closed> getClosedStats() {
+ return Collections.unmodifiableList(_closedStats);
Review Comment:
A unmodifiable list is very light (just an indirection) and TBH I prefer to
be a bit paranoic here so we don't end up modifying it in the future, which
would be difficult to catch.
This method is only called once per query on the broker. I don't think
creating a single small object (that can be probably scalar replaced) would be
problematic.
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