jihoonson commented on a change in pull request #11394:
URL: https://github.com/apache/druid/pull/11394#discussion_r665858849
##########
File path:
server/src/main/java/org/apache/druid/client/CachingClusteredClient.java
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@@ -369,6 +373,8 @@ private ClusterQueryResult(Sequence<T> sequence, int
numQueryServers)
query = scheduler.prioritizeAndLaneQuery(queryPlus, segmentServers);
queryPlus = queryPlus.withQuery(query);
+ queryPlus = queryPlus.withQueryMetrics(toolChest);
+
queryPlus.getQueryMetrics().reportQueriedSegmentCount(segmentServers.size()).emit(emitter);
Review comment:
`RetryQueryRunner` is responsible for re-routing the query to new homes
of segments if they are moved during query processing. It uses
`CachingClusteredClient` for re-routing. As a result, this can report the same
segments multiple times if those segments are moved. I think this is OK and
worth documenting.
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